Design of a digital PAD based on I/Q demodulation principle

geng zhe-qiao; cui yan-yan; hou mi; pei guo-xi

Volume 17 Issue 12

Dec. 2005

Turn off MathJax

Article Contents

Abstract

References

Article Navigation > High Power Laser and Particle Beams > 2005 > 17(12): 0-

Yang Wei, Hui Haohao, Ma Hongju, et al. KDP crystal antireflective coatings prepared by spin coating method[J]. High Power Laser and Particle Beams, 2013, 25: 3348-3352. doi: 3348

Citation:

geng zhe-qiao, cui yan-yan, hou mi, et al. Design of a digital PAD based on I/Q demodulation principle[J]. High Power Laser and Particle Beams, 2005, 17.

Yang Wei, Hui Haohao, Ma Hongju, et al. KDP crystal antireflective coatings prepared by spin coating method[J]. High Power Laser and Particle Beams, 2013, 25: 3348-3352. doi: 3348

Citation:

geng zhe-qiao, cui yan-yan, hou mi, et al. Design of a digital PAD based on I/Q demodulation principle[J]. High Power Laser and Particle Beams, 2005, 17.

PDF( 137 KB)

Design of a digital PAD based on I/Q demodulation principle

1.
Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

Publish Date: 2005-12-15

Abstract

Abstract

Conventional analog I/Q demodulator suffers from phase and amplitude imbalance and DC offset, which cause big error into the measurement. A digital PAD is designed. Based on I/Q demodulation principle, using digital algorithms, such as digital filter and Hilbert transform, the conventional measurement error can basically be removed. Measuremental results show that the digital PAD has a maximum phase error of ±0.5° and a resolution of 0.2°. Its temperature coefficient is -0.1°/℃. Its dynamic ranges for phase-measurement and amplitude-measurement are -18~5 dBm and -20~0 dBm, respectively. The digital PAD can meet the need of the BEPCⅡ phasing system.
- i/q demodulator,
- pad(phase-amplitude detector),
- phasing system,
- linac,
- hilbert transform

FullText(HTML)

References(0)

References

Relative Articles

[1]	Shao Zhuoxia, Zhang Tong, Dong Ziqiang, Zhou Zeran, He Zhigang, Wang Lin, Lu Yalin. Development of linear accelerator microwave system for terahertz near-field high-throughput material physical property testing system[J]. High Power Laser and Particle Beams, 2025, 37(1): 014004. doi: 10.11884/HPLPB202537.240168
[2]	Ni Wangbiao, Yu Yongbo, Xuan Ke, Xu Wei, Li Chuan, Liu Gongfa. Energy adjustment and application of the HLS-II linac[J]. High Power Laser and Particle Beams, 2023, 35(9): 094002. doi: 10.11884/HPLPB202335.230144
[3]	Liu Qinghua, Li Jing, Shan Lijun, Xiao Dexin, Pan Qing, Liu Yu, Wang Hanbin, Hu Dongcai, Zhang Peng, Li Shoutao, Wang Jianxin, Zhang Demin, Yan Longgang, Zhang Xiaoli, Gan Kongyin, Zhang Chengxin, Li Peng, Shen Xuming, Bo Wei, Chen Yunbin, Li Xiaohui, Wang Shuaihua, Yu Yong, Chen Hao, Hu Xiutai, Ma Guowu, Zhou Kui, Zhou Zheng, Wang Yuan, Yang Xingfan, Wu Dai, Li Ming, Chen Menxue, Hu Jinguang, Zhao Jianheng, Fan Guobin. High-energy CT system with 10 lp/mm spatial resolution[J]. High Power Laser and Particle Beams, 2022, 34(12): 124001. doi: 10.11884/HPLPB202234.220322
[4]	Yang Jing, Du Yaoyao, Wang Lin, Ye Qiang, Ma Huizhou, Wei Shujun, Yue Junhui, Sui Yanfeng, Gao Guodong, Tang Xuhui, Cao Jianshe. Development of digital BPM front-end conditioning circuit for BEPCII linac[J]. High Power Laser and Particle Beams, 2021, 33(5): 054005. doi: 10.11884/HPLPB202133.210046
[5]	Yang Jing, Cao Jianshe, Du Yaoyao, Wang Lin, Ma Yufei, Zhang Xing’er, Ye Qiang, Ma Huizhou, Wei Shujun, Yue Junhui, Sui Yanfeng. Design and implementation of digital delay and pulse generator of BEPC II linear accelerator[J]. High Power Laser and Particle Beams, 2020, 32(7): 074001. doi: 10.11884/HPLPB202032.200018
[6]	Ren Tianqi, Tang Leilei, Zhou Zeran. Upgrade of low level RF system based on Micro Telecom Computing Architecture (MTCA) for HLS-II LINAC[J]. High Power Laser and Particle Beams, 2020, 32(8): 084006. doi: 10.11884/HPLPB202032.200080
[7]	Wang Qian, Luo Qing, Sun Baogen. Design and simulation of a bunch length monitor for linac based on single cavity[J]. High Power Laser and Particle Beams, 2017, 29(11): 115101. doi: 10.11884/HPLPB201729.170258
[8]	Liu Yongtao, Huang Guirong, Shang Lei, Lin Hongxiang, Li Chao, Zhao Zhouyu, Du Baiting. SLED phase reverse system based on FPGA[J]. High Power Laser and Particle Beams, 2015, 27(08): 085103. doi: 10.11884/HPLPB201527.085103
[9]	Zhang Meng, Li Xuan, Deng Haixiao, Gu Qiang. Corrugated pipe as beam energy stabilizer[J]. High Power Laser and Particle Beams, 2014, 26(01): 015106. doi: 10.3788/HPLPB201426.015106
[10]	Zou Junying, Fang Jia, Sun Baogen, Yang Yongliang, Lu Ping, Zhou Zeran, Ma Tianji, Xu Hongliang. Characterization test of Libera Brilliance Single Pass processor[J]. High Power Laser and Particle Beams, 2012, 24(12): 2893-2896. doi: 10.3788/HPLPB20122412.2893
[11]	shu zhao, shen lianguan, sun yuan, wang xiucui, li mujun, pei yuanji. Optimized design on thermal stabilization of Linac tube based on solid 3D reconstruction[J]. High Power Laser and Particle Beams, 2011, 23(01): 0- .
[12]	sun yuan, shen lianguan, wang xiucui, pei yuanji. Simulation design and power distribution calculations of linac collinear load based on Kanthal alloy[J]. High Power Laser and Particle Beams, 2011, 23(10): 0- .
[13]	zhong shaopeng, zhao minghua, wang baoliang. Design and test of sub-harmonic cavity's coupler for 150 MeV linac of Shanghai synchrotron radiation facility[J]. High Power Laser and Particle Beams, 2010, 22(05): 0- .
[14]	peng jun, fu shi-nian. Design of 7 MeV drift tube linac as injector of proton accelerator for cancer therapy[J]. High Power Laser and Particle Beams, 2008, 20(04): 0- .
[15]	su zhi-jun, xin jian, jia qing-long. Focus measurement of electron linear accelerator[J]. High Power Laser and Particle Beams, 2007, 19(11): 0- .
[16]	li ji-hao, sun bao-gen, he duo-hui, lu ping, wang jun-hua, cao yong, zheng pu. Signal processing system for beam position monitor at HLS 200 MeV LINAC[J]. High Power Laser and Particle Beams, 2005, 17(09): 0- .
[17]	wei yong, li quan-feng. Ａnalysis on quadrupole system condition analysis of 9MeV traveling wave ＬＩＮＡＣ[J]. High Power Laser and Particle Beams, 2003, 15(03): 0- .
[18]	xi de-xun, zhou chang-bing. Uniformity calibration system of electron beam scan with BP ANN[J]. High Power Laser and Particle Beams, 2002, 14(01): 0- .
[19]	lu ping, sun bao gen, li wei min, xu hong liang, liu zu ping, pei yuan ji, hong jun, wang jun hua, he duo hui. Design of 200MeV energy spectrum analytic system of linac in NSRL[J]. High Power Laser and Particle Beams, 2002, 14(05): 0- .
[20]	jin xiao, xu zhou, yang xin-fan, cai gong-he, shen xu-min, den ren-pei, li min, du xin-shao, yang mao-rong, li zhen-hong, qian ming-quan, cai lin, pan qing, cen yun, liu jie, lu he-ping, zhao kui, zhan bao-cen, wang li-fang, xie da-lin, hao jian-kui, hu ke-song, zhou chuan-ming. Research of photo-cathode RF gun and superconducting accelerator experiment[J]. High Power Laser and Particle Beams, 2001, 13(06): 0- .