Non-coplanar strip line-fed wideband dual polarized bowtie antenna

Song Lizhong; Fang Qingyuan; Nie Yuming; Jin Ming

doi:10.3788/HPLPB201426.023007

Volume 26 Issue 02

Jan. 2014

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Article Navigation > High Power Laser and Particle Beams > 2014 > 26(02): 023007

Zhu Lianyan, Liao Cheng, Yang Dan, et al. Air breakdown threshold and maximum transmitted energy density of 110 GHz terahertz waves[J]. High Power Laser and Particle Beams, 2013, 25: 1435-1439. doi: 10.3788/HPLPB20132506.1435

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Song Lizhong, Fang Qingyuan, Nie Yuming, et al. Non-coplanar strip line-fed wideband dual polarized bowtie antenna[J]. High Power Laser and Particle Beams, 2014, 26: 023007. doi: 10.3788/HPLPB201426.023007

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Non-coplanar strip line-fed wideband dual polarized bowtie antenna

doi: 10.3788/HPLPB201426.023007

1.
School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China;
2.
State Key Laboratory of Millimeter Waves,Nanjing 210096,China

Received Date: 2013-07-12
Rev Recd Date: 2013-11-15
Publish Date: 2014-02-15

Abstract

Abstract

Considering the demand for dual-polarized wideband antenna in communication systems and radar systems, a wideband dual polarized bowtie antenna excited by non-coplanar strip line is proposed in this paper. Dual polarization is realized by two sets of orthogonal bowtie dipoles. The orthogonal bowtie dipoles are fed by a novel balun (a transition from microstrip line into strip line). The tapered microstrip line fed by a coaxial connector is converted into a non-coplanar strip line. Then, the non-coplanar strip line providing symmetrical electric field distribution is a balanced structure which satisfies the balanced feed requirements of bowtie dipoles. Experimental investigations indicate that the impedance bandwidth of 69.23% is available, and the voltage standing wave ratio (VSWR) is below 2 over the frequency range from 8 GHz to 12 GHz. In order to improve the antenna radiation and gain, the dual-polarized antenna is placed in a back cavity. The measure results show that the VSWR is approximately below 3 from 6.8 GHz to 18 GHz, the antenna gain is higher than 0.11 dB from 8 GHz to 12 GHz and the front to back ratio of the coplanar polarization is above 15 dB. The antenna designed can be used in wideband communication systems.
- dual polarized antenna,
- wideband antenna,
- bowtie antenna,
- balun,
- non-coplanar strip line

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