Investigations on the Terahertz Beam Scanning Antennas with a Wide Scanning Range

2018 ◽  
Author(s):  
Zhang-Cheng Hao ◽  
Wei Hong ◽  
Ji-Xin Chen ◽  
JianFeng Zhai
Keyword(s):  
Beam Scanning ◽  
Scanning Range

Compact line source generator for feeding continuous transverse stub arrays

2021 ◽  
pp. 1-12
Author(s):  
Houtong Qiu ◽  
Xue-Xia Yang ◽  
Meiling Li ◽  
Zixuan Yi
Keyword(s):  
Line Source ◽  
Cylindrical Wave ◽  
Center Frequency ◽  
Continuous Beam ◽  
Cross Polarization ◽  
Beam Scanning ◽  
Rotationally Symmetric ◽  
Planar Wave ◽  
Scanning Range ◽  
Polarization Level

Abstract Based on a substrate integrated lens (SIL), a compact line source generator (LSG) for feeding continuous transverse stub (CTS) arrays with linear-polarized (LP) beam scanning and dual-polarized (DP) operations is presented in this paper. The SIL consists of metamaterial cells with different sizes being arranged as concentric annulus and is printed on the center surface of two substrate layers. The SIL can convert the cylindrical wave generated by the feed probe of SIW-horn to the planar wave for feeding the CTS array. This rotationally symmetric SIL can be used conveniently to design LSG for feeding CTS arrays with the continuous beam scanning and DP operations, which has been verified by the fabrications and measurements. By simply rotating the SIW-horn along the edge of SIL, the 10-element LP-CTS array obtains a measured beam scanning range of ±35° with the highest gain of 20.6 dBi. By setting two orthogonal SIW-horns at the edge of the proposed SIL, the nine-element DP-CTS array with orthogonal radiation stubs is excited. The DP array obtains the gain of 20.3 dBi at the center frequency with the isolation of 28 dB and the cross-polarization level <−25 dB.

scholarly journals Dual-Beam and Tri-Band SIW Leaky-Wave Antenna With Wide Beam Scanning Range Including Broadside Direction

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 176361-176368 ◽  
Author(s):  
Yunjie Geng ◽  
Junhong Wang ◽  
Zheng Li ◽  
Yujian Li ◽  
Meie Chen ◽  
...  
Keyword(s):  
Leaky Wave ◽  
Beam Scanning ◽  
Wide Beam ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Dual Beam ◽  
Scanning Range

scholarly journals Mechanically Reconfigurable, Beam-Scanning Reflectarray and Transmitarray Antennas: A Review

2021 ◽  
Vol 11 (15) ◽  
pp. 6890
Author(s):  
Mirhamed Mirmozafari ◽  
Zongtang Zhang ◽  
Meng Gao ◽  
Jiahao Zhao ◽  
Mohammad Mahdi Honari ◽  
...  
Keyword(s):  
Performance Metrics ◽  
Efficiency Gain ◽  
Beam Scanning ◽  
Gain Bandwidth ◽  
Aperture Efficiency ◽  
Antenna Performance ◽  
Scanning Range

We review mechanically reconfigurable reflectarray (RA) and transmitarray (TA) antennas. We categorize the proposed approaches into three major groups followed by a hybrid category that is made up of a combination of the three major approaches. We discuss the examples in each category and compare their performance metrics including aperture efficiency, gain, bandwidth and scanning range and resolution. We also identify opportunities to build upon or extend these demonstrated approaches to realize further advances in antenna performance.

scholarly journals Line Beam Scanning-Based Ultra-Fast THz Imaging Platform

2019 ◽  
Vol 9 (1) ◽  
pp. 184
Author(s):  
Huachuan Huang ◽  
Qiao Liu ◽  
Yi Zou ◽  
Liguo Zhu ◽  
Zhenhua Li ◽  
...  
Keyword(s):  
Human Body ◽  
Scanning Speed ◽  
Thz Imaging ◽  
High Quality ◽  
Beam Scanning ◽  
Quality Performance ◽  
Optical Components ◽  
Scanning Angle ◽  
Line Beam ◽  
Scanning Range

In order to realize rapid THz detecting and imaging, a line beam scanning-based ultra-fast THz imaging platform is designed combining simple optical components and lightweight mechanical system. The designed THz imaging platform has the resolution of 12 mm, the scanning angle range of ±10.5°, the scanning speed of 0.17 s/frame, and the scanning range of 2 m × 0.8 m; moreover, it can realize rapid human body THz imaging and distinguish metallic objects. Considering its high-quality performance in THz imaging and detecting, it is believed the proposed line beam scanning-based ultra-fast THz imaging platform can be used in the future in various safe screening applications.

Design of a Voltage-Controlled Beam Scanning Antenna Array Based on CRLH TL

2013 ◽  
Vol 427-429 ◽  
pp. 628-631
Author(s):  
Rui Kun Wu ◽  
Guo Tai Chen
Keyword(s):  
Resonant Frequency ◽  
Transmission Line ◽  
Antenna Array ◽  
Bias Voltage ◽  
Power Divider ◽  
Beam Scanning ◽  
Radiation Beam ◽  
Small Antenna ◽  
Scanning Range ◽  
Scanning Antenna

The voltage-controlled beam scanning antenna array based on the CRLH transmission line is designed with series power divider and three small antenna. The resonant frequency of the open-termination power divider is 2.5GHz, and the varactor bias voltage of the small antenna is from 8V to 2V. At the operating frequency of 2.5GHz, the horizontally polarized pattern of the antenna array is measured. When the bias voltage of the varactor is changed, the antenna array radiation beam scanning range is up to 96 degrees, and its radiation from backward to forward can be achieved by controlling the varactor bias voltage.

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