MCML-BF: A Metal-Column Embedded Microstrip Line Transmission Structure with Bias Feeders for Beam-Scanning Leakage Antenna Design
Shunhu Hou, Shengliang Fang, Youchen Fan, Yuhai Li, Zhao Ma, Jinming Li
TL;DR
This paper introduces a new beam-scanning antenna design using metal columns and liquid crystal metamaterials to improve signal efficiency and scanning range at high frequencies.
Contribution
The novel MCML-BF structure enables fixed-frequency beam scanning with high efficiency and wide scanning range using a liquid crystal layer and bias feeders.
Findings
The MCML structure reduces electromagnetic wave dissipation and improves energy radiation efficiency.
The antenna achieves a 106° continuous beam scan from −52° to 54° at 38 GHz using the holographic principle.
The bias feeder structure minimizes interference between RF signals and DC bias, improving antenna performance.
Abstract
This article proposes a novel fixed-frequency beam scanning leakage antenna based on a liquid crystal metamaterial (LCM) and adopting a metal column embedded microstrip line (MCML) transmission structure. Based on the microstrip line (ML) transmission structure, it was observed that by adding two rows of metal columns in the dielectric substrate, electromagnetic waves can be more effectively transmitted to reduce dissipation, and attenuation loss can be lowered to improve energy radiation efficiency. This antenna couples TEM mode electromagnetic waves into free space by periodically arranging 72 complementary split ring resonators (CSRRs). The LC layer is encapsulated in the transmission medium between the ML and the metal grounding plate. The simulation results show that the antenna can achieve a 106° continuous beam turning from reverse −52° to forward 54° at a frequency of 38 GHz…
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Taxonomy
TopicsAntenna Design and Analysis · Advanced Antenna and Metasurface Technologies · Microwave Engineering and Waveguides