Radiation Pattern Reconfigurable Waveguide Slot Array Antenna Using Liquid Crystal

Abstract

In this paper, we proposed a radiation pattern reconfigurable waveguide slot array antenna using liquid crystal (LC). Together with the waveguide slot, the designed complementary electric-field-coupled resonator functions like a switch controlled by the dielectric constant of the LC, which can control the antenna element to radiate or not. Thus, the array factor and radiation pattern can be manipulated. The proposed antenna was simulated, fabricated, and measured. Its radiation direction can be reconfigured to 46° or 0° at about 15 GHz.

Design and Fabrication of Reflective Phase Shifter for Two‐Dimensional Terahertz Beam‐Scanning Reflectarray

“…Besides, LCs also have excellent dielectric tunability in the terahertz frequency band, so the LC‐based phase shifter ensures the reflection phase control by varying the voltage. Furthermore, it provides a large phase shift range and wide bandwidth, which allows the LC‐based reflectarray to increase the freedom of control for each unit [ 17–19 ] . Moreover, the LC materials are easily produced and have a low bias voltage, which is beneficial for the design and fabrication of related complex array structures.…”

Hibridinių meandrinių struktūrų dažninių charakteristikų tyrimas

“…Meandrinės struktūros plačiai naudojamos daugelyje mikrobangų įtaisų, o šie dažnai naudojami daiktų interneto įrenginiuose: antenose (Ghosh et al, 2017;Islam et al, 2019;Yamaguchi et al, 2018;Jais et al, 2012;Rahardi et al, 2020;Shao et al, 2018;Zhang et al, 2018), antenų gardelėse (Alqadami et al, 2020;Alsath et al, 2013;Chen et al, 2019;Li et al, 2018;Olan-Nuñez et al, 2020), vėlinimo linijose (Hui & Li, 2017;Salim et al, 2019;Szczepaniak & Susek, 2020), filtruose (Hou et al, 2017;Karpuz et al, 2015;Khodenkov & Shokirov, 2017;Xu et al, 2020), rezonatoriuose (Chakraborty et al, 2016;Guo et al, 2020;Podilchak et al, 2016;Zhong et al, 2017), fazės keitikliuose (Al-Saedi et al, 2018;Shu et al, 2018;Trinh et al, 2019), bėgančiosios bangos elektroniniuose vamzdžiuose (Socuéllamos et al, 2020;Wang et al, 2020) ir kitur. Daugeliu atvejų meandrinės struktūros projektuojamos siekiant atlikti signalų sinchronizaciją, t. y. pavėlinant vieną signalą kito signalo atžvilgiu.…”

“…2017; Podilchak et al, 2016;Chakraborty et al, 2016;Guo et al, 2020), phase shifters (Shu et al, 2018;Al-Saedi et al, 2018;Trinh et al, 2019), etc. Currently, the miniaturisation of existing microwave devices is one of the most relevant areas of research (Akkader et al, 2022).…”