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A Compact and Fast 1 × 4 Continuously Steerable Endfire Phased-Array Antenna Based on Liquid Crystal

Wang, Dongwei ; Polat, Ersin ; Tesmer, Henning ; Jakoby, Rolf ; Maune, Holger (2021):
A Compact and Fast 1 × 4 Continuously Steerable Endfire Phased-Array Antenna Based on Liquid Crystal.
In: IEEE Antennas and Wireless Propagation Letters, 20 (10), pp. 1859-1862. IEEE, ISSN 1536-1225, e-ISSN 1548-5757,
DOI: 10.1109/LAWP.2021.3096035,
[Article]

Abstract

This letter presents a planar endfire Yagi-Uda antenna phased array fed by a corporate network. The phase of each radiating element is controlled by a loaded line phase shifter based on liquid crystal technology. The phase shifters are meandered to minimize the dimension of the array and are measured to provide maximum differential phase shift of 400\circ with a figure-of-merit of 54\circ \rm dB⁻¹ at 28.4 GHz. Each phase shifter is tuned individually by applying bias voltage through high impedance chromium line together with dc blocks. The array is designed for full-range scanning in E-plane with >\!360\circ phase shifters. Measurements show that it can be steered from −40\circ to 40\circ by applying dc bias in the range of 0–5 V and from −50\circ to 60\circ with degraded patterns. The maximum gain of the phased array antennas is measured to be 4.5 dBi. The array beam is able to be fast steered within approximately 1 s.

Item Type: Article
Erschienen: 2021
Creators: Wang, Dongwei ; Polat, Ersin ; Tesmer, Henning ; Jakoby, Rolf ; Maune, Holger
Title: A Compact and Fast 1 × 4 Continuously Steerable Endfire Phased-Array Antenna Based on Liquid Crystal
Language: English
Abstract:

This letter presents a planar endfire Yagi-Uda antenna phased array fed by a corporate network. The phase of each radiating element is controlled by a loaded line phase shifter based on liquid crystal technology. The phase shifters are meandered to minimize the dimension of the array and are measured to provide maximum differential phase shift of 400\circ with a figure-of-merit of 54\circ \rm dB⁻¹ at 28.4 GHz. Each phase shifter is tuned individually by applying bias voltage through high impedance chromium line together with dc blocks. The array is designed for full-range scanning in E-plane with >\!360\circ phase shifters. Measurements show that it can be steered from −40\circ to 40\circ by applying dc bias in the range of 0–5 V and from −50\circ to 60\circ with degraded patterns. The maximum gain of the phased array antennas is measured to be 4.5 dBi. The array beam is able to be fast steered within approximately 1 s.

Journal or Publication Title: IEEE Antennas and Wireless Propagation Letters
Journal volume: 20
Number: 10
Publisher: IEEE
Uncontrolled Keywords: Phase shifters;Phased arrays;Antenna arrays;Antenna measurements;Gain;Voltage measurement;Standards;Beam steering;liquid crystal (LC);loaded line;planar array;printed circuits
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics > Microwave Engineering
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics
Date Deposited: 01 Nov 2021 10:52
DOI: 10.1109/LAWP.2021.3096035
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