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RSS2013 Vol. 25, No. 06
Recommend Articles
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2013,
25: 1341-1344.
doi: 10.3788/HPLPB20132506.1341
Abstract:
This paper reports a continuous-wave 3.5 m mid-infrared laser based on LD end-pumped Nd:YLF/KTA intra-cavity optical parametric oscillator (OPO). A non-critical phase matching cut KTA crystal with 5 mm5 mm20 mm in size was adopted as the nonlinear op...
This paper reports a continuous-wave 3.5 m mid-infrared laser based on LD end-pumped Nd:YLF/KTA intra-cavity optical parametric oscillator (OPO). A non-critical phase matching cut KTA crystal with 5 mm5 mm20 mm in size was adopted as the nonlinear op...
2013,
25: 1345-1350.
doi: 10.3788/HPLPB20132506.1345
Abstract:
A method based on superposition of multiple reconstructed images is presented for coherent noise reduction of the phase image in digital holography. The proposed method obtains multiple off-axis holograms upon rotation of the illuminating light in th...
A method based on superposition of multiple reconstructed images is presented for coherent noise reduction of the phase image in digital holography. The proposed method obtains multiple off-axis holograms upon rotation of the illuminating light in th...
2013,
25: 1351-1353.
doi: 10.3788/HPLPB20132506.1351
Abstract:
In the video of linear CCD camera being irradiated by 532 nm CW laser, the entirely saturated unilateral smear of laser spot was found. The smear area does not represent the distribution of laser. Since this smear lies merely in one side of laser spo...
In the video of linear CCD camera being irradiated by 532 nm CW laser, the entirely saturated unilateral smear of laser spot was found. The smear area does not represent the distribution of laser. Since this smear lies merely in one side of laser spo...
2013,
25: 1354-1358.
doi: 10.3788/HPLPB20132506.1354
Abstract:
In order to resolve the problem that camouflage target could hardly be detected and identified by the classical means, a spectral polarization detection system was introduced and developed at first. Then the spectral polarization experiment about the...
In order to resolve the problem that camouflage target could hardly be detected and identified by the classical means, a spectral polarization detection system was introduced and developed at first. Then the spectral polarization experiment about the...
2013,
25: 1359-1364.
doi: 10.3788/HPLPB20132506.1359
Abstract:
According to the reaction mechanism of laser beam, powder particles and melting pool during the laser cladding process, a mathematical model of powder utilization efficiency was formulated. A quantitive expression describing the relation between the ...
According to the reaction mechanism of laser beam, powder particles and melting pool during the laser cladding process, a mathematical model of powder utilization efficiency was formulated. A quantitive expression describing the relation between the ...
2013,
25: 1365-1369.
doi: 10.3788/HPLPB20132506.1365
Abstract:
In order to improve the imaging quality of pre-magnification digital holography, the imaging systems of pre-magnification digital holography with the plane wave and spherical wave respectively as the reference light are studied and compared theoretic...
In order to improve the imaging quality of pre-magnification digital holography, the imaging systems of pre-magnification digital holography with the plane wave and spherical wave respectively as the reference light are studied and compared theoretic...
2013,
25: 1370-1374.
doi: 10.3788/HPLPB20132506.1370
Abstract:
To study the effect of oil phase and water phase on the wall thickness in the emulsion encapsulation method, an expression of the wall thickness varying with the polymer mass fraction in oil phase and the volume ratio of polymer solution and inner wa...
To study the effect of oil phase and water phase on the wall thickness in the emulsion encapsulation method, an expression of the wall thickness varying with the polymer mass fraction in oil phase and the volume ratio of polymer solution and inner wa...
2013,
25: 1375-1378.
doi: 10.3788/HPLPB20132506.1375
Abstract:
The diamond phase fraction, optical constant and hardness of diamond-like carbon thin films deposited at different radio frequency powers by radio frequency plasma chemical vapor deposition have been investigated. The diamond phase fraction, optical ...
The diamond phase fraction, optical constant and hardness of diamond-like carbon thin films deposited at different radio frequency powers by radio frequency plasma chemical vapor deposition have been investigated. The diamond phase fraction, optical ...
2013,
25: 1379-1382.
doi: 10.3788/HPLPB20132506.1379
Abstract:
Using the reference frame transformation, radiation damping effects in ultra-intense laser-plasma interaction are analyzed based on the motion equation of a radiation electron. The results show that, in both cases of the circularly and the linearly p...
Using the reference frame transformation, radiation damping effects in ultra-intense laser-plasma interaction are analyzed based on the motion equation of a radiation electron. The results show that, in both cases of the circularly and the linearly p...
2013,
25: 1383-1386.
Abstract:
Based on electro-optical theory and adiabatic compression theory, a double-anode magnetic injection gun for TE34,19，170 GHz gyrotron was analyzed and designed with EGUN software. Concerning with the factors such as positions of anode and magnetic fie...
Based on electro-optical theory and adiabatic compression theory, a double-anode magnetic injection gun for TE34,19，170 GHz gyrotron was analyzed and designed with EGUN software. Concerning with the factors such as positions of anode and magnetic fie...
2013,
25: 1387-1390.
Abstract:
To improve the performance of high power microwave (HPM) antennas, a novel X-band left-handed material planar radome is developed. The measurement results of this radome show that the beam of a antenna can be focused by using the left-handed material...
To improve the performance of high power microwave (HPM) antennas, a novel X-band left-handed material planar radome is developed. The measurement results of this radome show that the beam of a antenna can be focused by using the left-handed material...
2013,
25: 1391-1395.
doi: 10.3788/HPLPB20132506.1391
Abstract:
The power series method is used to analyze the nonlinear distortion characteristics of the predistortion linearizer which are contrary to the distortion characteristics of the travelling wave tube amplifier(TWTA), and also the model of the predistort...
The power series method is used to analyze the nonlinear distortion characteristics of the predistortion linearizer which are contrary to the distortion characteristics of the travelling wave tube amplifier(TWTA), and also the model of the predistort...
2013,
25: 1396-1400.
doi: 10.3788/HPLPB20132506.1396
Abstract:
Bremsstrahlung source with high energy electrons will produce a substantial excess of high energy photons, and these photons and electrons severely degrade the fidelity of system generated electromagnetic pulse(SGEMP) simulations. Thus, the developme...
Bremsstrahlung source with high energy electrons will produce a substantial excess of high energy photons, and these photons and electrons severely degrade the fidelity of system generated electromagnetic pulse(SGEMP) simulations. Thus, the developme...
2013,
25: 1401-1404.
doi: 10.3788/HPLPB20132506.1401
Abstract:
A 200-kV flash X-ray radiographic test system based on the principle of Marx generator is introduced. The system has a delay function that it can produce X rays at predetermined time in accordance with the experimental requirement. A 10-stage 200-kV ...
A 200-kV flash X-ray radiographic test system based on the principle of Marx generator is introduced. The system has a delay function that it can produce X rays at predetermined time in accordance with the experimental requirement. A 10-stage 200-kV ...
2013,
25: 1405-1408.
doi: 10.3788/HPLPB20132506.1405
Abstract:
Two GaAs/AlxGa1-xAs infrared quantum well materials with different structure parameters have been made by using metal organic chemical vapor deposition. The photoresponse spectra are obtained at 77 K by use of Fourier transform spectrometer for two s...
Two GaAs/AlxGa1-xAs infrared quantum well materials with different structure parameters have been made by using metal organic chemical vapor deposition. The photoresponse spectra are obtained at 77 K by use of Fourier transform spectrometer for two s...
2013,
25: 1409-1413.
doi: 10.3788/HPLPB20132506.1409
Abstract:
The stacked Blumlein line has significant potential to be applied in the high-power compact pulsed generator. The analytical expression of the output pulse for a lossless stacked Blumlein line is obtained by using Laplace transform in this paper. A t...
The stacked Blumlein line has significant potential to be applied in the high-power compact pulsed generator. The analytical expression of the output pulse for a lossless stacked Blumlein line is obtained by using Laplace transform in this paper. A t...
2013,
25: 1414-1418.
doi: 10.3788/HPLPB20132506.1414
Abstract:
This paper presents a pulse forming network(PFN) stacked Blumlein pulse generator commutated by a single switch, in which the PFN is composed of ceramic capacitors and plate conductors. The shorted discharging characteristic of the shorted parasitic ...
This paper presents a pulse forming network(PFN) stacked Blumlein pulse generator commutated by a single switch, in which the PFN is composed of ceramic capacitors and plate conductors. The shorted discharging characteristic of the shorted parasitic ...
2013,
25: 1419-1426.
doi: 10.3788/HPLPB20132506.1419
Abstract:
Based on a large-scale parallel code named NEPTUNE3D for 3D fully electromagnetic and PIC simulations programmed by our group, we design and develop a Finite Conductivity Wall (FCW) module in order to simulate the gain loss phenomenon in THz travelin...
Based on a large-scale parallel code named NEPTUNE3D for 3D fully electromagnetic and PIC simulations programmed by our group, we design and develop a Finite Conductivity Wall (FCW) module in order to simulate the gain loss phenomenon in THz travelin...
2013,
25: 1427-1430.
doi: 10.3788/HPLPB20132506.1427
Abstract:
The carrier absorption of the doped semiconductor materials is evident in terahertz (THz). The reciprocity study is the basis for preparing the key apparatus in the THz communications. Using a pulsed KrF excimer laser ablation (PLD) technique, the Ni...
The carrier absorption of the doped semiconductor materials is evident in terahertz (THz). The reciprocity study is the basis for preparing the key apparatus in the THz communications. Using a pulsed KrF excimer laser ablation (PLD) technique, the Ni...
2013,
25: 1431-1434.
doi: 10.3788/HPLPB20132506.1431
Abstract:
CO2 laser pump source is one of the most important core components of optically pumped THz gas laser, and its performance will directly affect the stability of the THz laser. A blazed grating is generally employed as a total reflecting tail mirror to...
CO2 laser pump source is one of the most important core components of optically pumped THz gas laser, and its performance will directly affect the stability of the THz laser. A blazed grating is generally employed as a total reflecting tail mirror to...
2013,
25: 1435-1439.
doi: 10.3788/HPLPB20132506.1435
Abstract:
With the development of the power capacity of 110 GHz high-power terahertz waves, the air breakdown by 110 GHz high-power terahertz waves has drawn more and more attention. Several approximations of effective ionization parameters are introduced into...
With the development of the power capacity of 110 GHz high-power terahertz waves, the air breakdown by 110 GHz high-power terahertz waves has drawn more and more attention. Several approximations of effective ionization parameters are introduced into...
2013,
25: 1440-1444.
doi: 10.3788/HPLPB20132506.1440
Abstract:
The subwavelength semiconductor sphere arrays in THz range are simulated with T-matrix method. Based on the numerical results, their optical properties are also discussed. The properties of semiconductor surface plasmon can be tailored within the ter...
The subwavelength semiconductor sphere arrays in THz range are simulated with T-matrix method. Based on the numerical results, their optical properties are also discussed. The properties of semiconductor surface plasmon can be tailored within the ter...
2013,
25: 1445-1449.
doi: 10.3788/HPLPB20132506.1445
Abstract:
The atmosphere is opaque to terahertz wave, hence knowing accurately the location and width of atmospheric transmission windows is crucial to facilitating any type of applications utilizing THz technology. In this paper, the line-by-line integral met...
The atmosphere is opaque to terahertz wave, hence knowing accurately the location and width of atmospheric transmission windows is crucial to facilitating any type of applications utilizing THz technology. In this paper, the line-by-line integral met...
2013,
25: 1450-1454.
doi: 10.3788/HPLPB20132506.1450
Abstract:
Through theoretical analysis and PIC simulation, beam emittances of 140, 220 and 345 GHz FWG-TWTs are studied. The relationships of beam emittance with frequency, structure size and even the related parameters of electron beam are summarized. It is s...
Through theoretical analysis and PIC simulation, beam emittances of 140, 220 and 345 GHz FWG-TWTs are studied. The relationships of beam emittance with frequency, structure size and even the related parameters of electron beam are summarized. It is s...
2013,
25: 1455-1459.
doi: 10.3788/HPLPB20132506.1455
Abstract:
The scheme of elliptical hole-coupling optical resonator is proposed instead of circular hole-coupling resonator which is used in THz FEL in order to increase the output power and resonator quality. Three-dimensional simulations and design on ellipti...
The scheme of elliptical hole-coupling optical resonator is proposed instead of circular hole-coupling resonator which is used in THz FEL in order to increase the output power and resonator quality. Three-dimensional simulations and design on ellipti...
2013,
25: 1460-1464.
doi: 10.3788/HPLPB20132506.1460
Abstract:
The intersubband optical absorption of a semiconductor quantum well driven by an in-plane terahertz electric field is investigated theoretically by employing the extended semiconductor Bloch equations. Our results show that in-plane polarized teraher...
The intersubband optical absorption of a semiconductor quantum well driven by an in-plane terahertz electric field is investigated theoretically by employing the extended semiconductor Bloch equations. Our results show that in-plane polarized teraher...
2013,
25: 1465-1468.
doi: 10.3788/HPLPB20132506.1465
Abstract:
A miniature extracavity terahertz(THz) parametric oscillator is proposed based on surface-emitted technology. Using a small sized pulsed laser to pump MgO:LiNbO3 crystal, the THz-wave is emitted perpendicularly to the crystal surface by optimization ...
A miniature extracavity terahertz(THz) parametric oscillator is proposed based on surface-emitted technology. Using a small sized pulsed laser to pump MgO:LiNbO3 crystal, the THz-wave is emitted perpendicularly to the crystal surface by optimization ...
2013,
25: 1469-1474.
doi: 10.3788/HPLPB20132506.1469
Abstract:
Terahertz inverse synthetic aperture radar (THz-ISAR) works at high frequency band with short wavelength and large bandwidth. Compared to ISAR operated in microwave band, THz-ISAR is more susceptible to the phase error which will cause the spread and...
Terahertz inverse synthetic aperture radar (THz-ISAR) works at high frequency band with short wavelength and large bandwidth. Compared to ISAR operated in microwave band, THz-ISAR is more susceptible to the phase error which will cause the spread and...
2013,
25: 1475-1478.
doi: 10.3788/HPLPB20132506.1475
Abstract:
A novel fabrication technique for high density gate hole arrays used in field emission cold cathodes is present here. This technique has been implemented by combining the micro electromechanical system (MEMS) processes with the microsphere lithograph...
A novel fabrication technique for high density gate hole arrays used in field emission cold cathodes is present here. This technique has been implemented by combining the micro electromechanical system (MEMS) processes with the microsphere lithograph...
2013,
25: 1479-1482.
doi: 10.3788/HPLPB20132506.1479
Abstract:
Several metal hole array(MHA) structures of different sizes and shapes in THz were designed. The detection sensitivity of the structures with ultra-thin and low refractive index polyimide films, was explored on a THz time-domain system. MHAs with dif...
Several metal hole array(MHA) structures of different sizes and shapes in THz were designed. The detection sensitivity of the structures with ultra-thin and low refractive index polyimide films, was explored on a THz time-domain system. MHAs with dif...
2013,
25: 1483-1488.
doi: 10.3788/HPLPB20132506.1483
Abstract:
Based on our previous work which introduced an explicit method to design the slow wave circuit of a 0.14 THz broadband folded waveguide traveling wave tube, a 0.14 THz watt-level folded waveguide traveling wave tube has been designed, with a set of s...
Based on our previous work which introduced an explicit method to design the slow wave circuit of a 0.14 THz broadband folded waveguide traveling wave tube, a 0.14 THz watt-level folded waveguide traveling wave tube has been designed, with a set of s...
2013,
25: 1489-1493.
doi: 10.3788/HPLPB20132506.1489
Abstract:
In order to develop the compact high-power terahertz (THz) source, a 0.22 THz source is designed theoretically by adopting the structure of surface-wave oscillator (SWO). We focus on the influence of the slow-wave structure (SWS) on resonant frequenc...
In order to develop the compact high-power terahertz (THz) source, a 0.22 THz source is designed theoretically by adopting the structure of surface-wave oscillator (SWO). We focus on the influence of the slow-wave structure (SWS) on resonant frequenc...
2013,
25: 1494-1498.
doi: 10.3788/HPLPB20132506.1494
Abstract:
Field emission from carbon nanotube (CNT) has been simulated by a particle-in-cell (PIC) software at pico-second level. The emission current, current density and focus character of a CNT cathode have been discussed. In a diode configuration, the emis...
Field emission from carbon nanotube (CNT) has been simulated by a particle-in-cell (PIC) software at pico-second level. The emission current, current density and focus character of a CNT cathode have been discussed. In a diode configuration, the emis...
2013,
25: 1499-1503.
doi: 10.3788/HPLPB20132506.1499
Abstract:
The measuring methods and experimental results for the parameters including frequency and power of 0.14 THz high-power terahertz pulse are presented. Characterized by high frequency, high peak power and short pulse duration, the terahertz pulse is ex...
The measuring methods and experimental results for the parameters including frequency and power of 0.14 THz high-power terahertz pulse are presented. Characterized by high frequency, high peak power and short pulse duration, the terahertz pulse is ex...
2013,
25: 1504-1508.
doi: 10.3788/HPLPB20132506.1504
Abstract:
Time delay effect on optical dipole antennas space power synthesis is analyzed. Utilizing terahertz time-domain spectroscopy, we obtain terahertz time-domain spectrogram of 34, 500 and 1000 m optical dipole antenna separately. The time delay effect o...
Time delay effect on optical dipole antennas space power synthesis is analyzed. Utilizing terahertz time-domain spectroscopy, we obtain terahertz time-domain spectrogram of 34, 500 and 1000 m optical dipole antenna separately. The time delay effect o...
2013,
25: 1509-1512.
doi: 10.3788/HPLPB20132506.1509
Abstract:
A large current and a high emission current density from printed carbon nanotube (CNT) are reported. To enhance the field-emission current, a small number of metal nano-particles were added to the CNT paste. The metal nano-particles enhanced the emit...
A large current and a high emission current density from printed carbon nanotube (CNT) are reported. To enhance the field-emission current, a small number of metal nano-particles were added to the CNT paste. The metal nano-particles enhanced the emit...
2013,
25: 1513-1518.
doi: 10.3788/HPLPB20132506.1513
Abstract:
Based on the rigorous electromagnetic field theory, the rigorous expression of terahertz waves in micro-ring resonators with shape and fishnet structure is given in this paper. With the boundary conditions of electromagnetic field, the enhancement ef...
Based on the rigorous electromagnetic field theory, the rigorous expression of terahertz waves in micro-ring resonators with shape and fishnet structure is given in this paper. With the boundary conditions of electromagnetic field, the enhancement ef...
2013,
25: 1519-1522.
doi: 10.3788/HPLPB20132506.1519
Abstract:
We show a Josephosn junction terahertz harmonic mixer system, in which the high temperature superconducting (HTS) Josephson junction is set up on a cold figure in the small pulse-tube cryocooler working at the bath temperature of 60 K. We improved th...
We show a Josephosn junction terahertz harmonic mixer system, in which the high temperature superconducting (HTS) Josephson junction is set up on a cold figure in the small pulse-tube cryocooler working at the bath temperature of 60 K. We improved th...
2013,
25: 1523-1526.
doi: 10.3788/HPLPB20132506.1523
Abstract:
Low temperature (LT) InGaAs materials were grown by gas source molecular beam epitaxy, and the influence of growth temperature as well as arsenic pressure on InGaAs material properties was studied. The optimized deposition conditions were established...
Low temperature (LT) InGaAs materials were grown by gas source molecular beam epitaxy, and the influence of growth temperature as well as arsenic pressure on InGaAs material properties was studied. The optimized deposition conditions were established...
2013,
25: 1527-1529.
doi: 10.3788/HPLPB20132506.1527
Abstract:
Tolerance analysis of a filter with different cavity widths is presented, showing that different widths should be used for filters in different frequency bands in order to degrade manufacturing tolerance. Moreover, the effect of various resonant mode...
Tolerance analysis of a filter with different cavity widths is presented, showing that different widths should be used for filters in different frequency bands in order to degrade manufacturing tolerance. Moreover, the effect of various resonant mode...
2013,
25: 1530-1534.
doi: 10.3788/HPLPB20132506.1530
Abstract:
This article presents a 0.34 THz T/R front-end based on Schottky barrier diode (SBD) techniques. It is designed as a superheterodyne structure, and consists of 0.34 THz sub-harmonic mixer, 0.17 THz X8 multiplier chain and bias circuit. The 0.34 THz s...
This article presents a 0.34 THz T/R front-end based on Schottky barrier diode (SBD) techniques. It is designed as a superheterodyne structure, and consists of 0.34 THz sub-harmonic mixer, 0.17 THz X8 multiplier chain and bias circuit. The 0.34 THz s...
2013,
25: 1535-1540.
doi: 10.3788/HPLPB20132506.1535
Abstract:
The quasi-optical feed system is a key component of the millimeter/sub-millimeter sensor. The design theory and methods of millimeter/sub-millimeter wave quasi-optical system are described. The varieties, functions and design process of quasi-optical...
The quasi-optical feed system is a key component of the millimeter/sub-millimeter sensor. The design theory and methods of millimeter/sub-millimeter wave quasi-optical system are described. The varieties, functions and design process of quasi-optical...
2013,
25: 1541-1544.
doi: 10.3788/HPLPB20132506.1541
Abstract:
This paper reviews three kinds of terahertz (THz) radar cross section (RCS) measurement technologies, viz. microwave up-conversion, laser down-conversion and terahertz time-domain spectrum. Their characteristics like set-ups, specialties and applicat...
This paper reviews three kinds of terahertz (THz) radar cross section (RCS) measurement technologies, viz. microwave up-conversion, laser down-conversion and terahertz time-domain spectrum. Their characteristics like set-ups, specialties and applicat...
2013,
25: 1545-1548.
doi: 10.3788/HPLPB20132506.1545
Abstract:
A three-dimensional (3-D) image reconstruction algorithm based on mixed-domain is developed for terahertz holographic imager. Matched filtering in the spatial wave-number domain is employed to focus images in the vertical direction. Combined with bac...
A three-dimensional (3-D) image reconstruction algorithm based on mixed-domain is developed for terahertz holographic imager. Matched filtering in the spatial wave-number domain is employed to focus images in the vertical direction. Combined with bac...
2013,
25: 1549-1554.
doi: 10.3788/HPLPB20132506.1549
Abstract:
Detailed components on conductor surface such as micro-structure and roughness will affect the electromagnetic scattering behavior of target in terahertz regime. For weighting this impact, the effect of different surface micro-structure on the electr...
Detailed components on conductor surface such as micro-structure and roughness will affect the electromagnetic scattering behavior of target in terahertz regime. For weighting this impact, the effect of different surface micro-structure on the electr...
2013,
25: 1555-1560.
doi: 10.3788/HPLPB20132506.1555
Abstract:
The paper points out terahertz imaging algorithm has yet to be developed, in contrast to other matured imaging algorithm. It may be said that there is a terahertz gap in the field of imaging algorithm. Then, based on the classification of terahertz i...
The paper points out terahertz imaging algorithm has yet to be developed, in contrast to other matured imaging algorithm. It may be said that there is a terahertz gap in the field of imaging algorithm. Then, based on the classification of terahertz i...
2013,
25: 1561-1565.
doi: 10.3788/HPLPB20132506.1561
Abstract:
In order to design an optical imaging system working in the terahertz range, a comprehensive analysis and comparison of various optical imaging systems are given, the character and unique advantages of off-axis three-mirror system are presented. With...
In order to design an optical imaging system working in the terahertz range, a comprehensive analysis and comparison of various optical imaging systems are given, the character and unique advantages of off-axis three-mirror system are presented. With...
2013,
25: 1566-1568.
doi: 10.3788/HPLPB20132506.1566
Abstract:
To explore the characteristics of terahertz absorption spectra of lipid macromolecules, terahertz time-domain spectroscopy (THz-TDS) is applied to seven types of plant oils and two types of blend oils. The oils are measured in the frequency range ext...
To explore the characteristics of terahertz absorption spectra of lipid macromolecules, terahertz time-domain spectroscopy (THz-TDS) is applied to seven types of plant oils and two types of blend oils. The oils are measured in the frequency range ext...
2013,
25: 1569-1572.
doi: 10.3788/HPLPB20132506.1569
Abstract:
Antimony doped tin oxide (ATO) powder was prepared by liquid phase chemical coprecipitation method with the SnCl45H2O and SbCl3 used as raw materials. The effects of the doping concentration of Sb on the energy gap, and the transmission characteristi...
Antimony doped tin oxide (ATO) powder was prepared by liquid phase chemical coprecipitation method with the SnCl45H2O and SbCl3 used as raw materials. The effects of the doping concentration of Sb on the energy gap, and the transmission characteristi...
2013,
25: 1573-1576.
doi: 10.3788/HPLPB20132506.1573
Abstract:
The paper focuses on experiments and testing researches on the attenuation of THz electromagnetic radiation due to atmospheres absorption. The difference system with double light paths is designed to minimize systemic errors caused by the instability...
The paper focuses on experiments and testing researches on the attenuation of THz electromagnetic radiation due to atmospheres absorption. The difference system with double light paths is designed to minimize systemic errors caused by the instability...
2013,
25: 1577-1581.
doi: 10.3788/HPLPB20132506.1577
Abstract:
A real-time signal processing system was designed for the 0.14 THz high resolution imaging radar. The hardware structure was established using CPU+GPU+FPGA to enhance its operation ability. In this inverse synthetic aperture radar (ISAR), the range-D...
A real-time signal processing system was designed for the 0.14 THz high resolution imaging radar. The hardware structure was established using CPU+GPU+FPGA to enhance its operation ability. In this inverse synthetic aperture radar (ISAR), the range-D...
2013,
25: 1582-1586.
doi: 10.3788/HPLPB20132506.1582
Abstract:
In order to verify the feasibility of submillimeter wave radiometer in the terminal guidance, the sky brightness temperature and apparent temperature are calculated. Moreover, the experiments for detecting ground metal and coating stealth targets are...
In order to verify the feasibility of submillimeter wave radiometer in the terminal guidance, the sky brightness temperature and apparent temperature are calculated. Moreover, the experiments for detecting ground metal and coating stealth targets are...
2013,
25: 1587-1591.
doi: 10.3788/HPLPB20132506.1587
Abstract:
Using look-ahead unwrap, sum relaxation and delay relaxation of relaxed look-ahead technique, we develop a pipelined parallel adaptive CMA blind equalization algorithm. An iterated short convolution based fast parallel FIR filter is used to analyze t...
Using look-ahead unwrap, sum relaxation and delay relaxation of relaxed look-ahead technique, we develop a pipelined parallel adaptive CMA blind equalization algorithm. An iterated short convolution based fast parallel FIR filter is used to analyze t...
2013,
25: 1592-1596.
doi: 10.3788/HPLPB20132506.1592
Abstract:
Using the terahertz imaging technology for its microwave penetration characteristics and high resolution of infrared imaging, a near-field terahertz passive synthetic aperture imaging system is put forward on the basis of the infrared and millimeter ...
Using the terahertz imaging technology for its microwave penetration characteristics and high resolution of infrared imaging, a near-field terahertz passive synthetic aperture imaging system is put forward on the basis of the infrared and millimeter ...
2013,
25: 1597-1600.
doi: 10.3788/HPLPB20132506.1597
Abstract:
This study puts forward an image segmentation algorithm for passive terahertz images. First of all, the captured original terahertz images are denoised in the preprocessing course. Afterwards, we select the seed regions and the growing criteria by an...
This study puts forward an image segmentation algorithm for passive terahertz images. First of all, the captured original terahertz images are denoised in the preprocessing course. Afterwards, we select the seed regions and the growing criteria by an...
2013,
25: 1601-1604.
doi: 10.3788/HPLPB20132506.1601
Abstract:
A 0.2 THz stepped frequency radar imaging system with 12 GHz bandwidth which uses inverse synthetic aperture to realize two-dimensional high resolution imagery is proposed and designed. The results of Matlab simulation based on system design paramete...
A 0.2 THz stepped frequency radar imaging system with 12 GHz bandwidth which uses inverse synthetic aperture to realize two-dimensional high resolution imagery is proposed and designed. The results of Matlab simulation based on system design paramete...
2013,
25: 1605-1608.
doi: 10.3788/HPLPB20132506.1605
Abstract:
Wide band can be achieved in terahertz (THz) spectrum, so a high resolution terahertz imaging system can be realized according to the radar imaging theory. The stepped THz pulse is obtained by mixing and multiplying the microwave source, and a 220 GH...
Wide band can be achieved in terahertz (THz) spectrum, so a high resolution terahertz imaging system can be realized according to the radar imaging theory. The stepped THz pulse is obtained by mixing and multiplying the microwave source, and a 220 GH...
