Asymmetric meander line slot‐based X‐band leaky wave antenna

Abstract

This article presents broadband, high gain, and highly efficient, leaky wave antenna for X‐band applications. The proposed leaky wave antenna consists of periodic unit cells created by a combination of modified asymmetric meander line slots and an array of metallic via. The proposed unit cell configuration work as a composite left hand‐right hand leaky wave transmission line and it is characterized using dispersion analysis. The simulated and measurement results indicate that the proposed antenna offers a wide bandwidth of 52.94% (*with stop band of 2.1%) and a large beam scanning range from −59° to 70° with a maximum measured gain of 13.1 dBi.

A periodic meandering microstrip line leaky‐wave antenna with consistent gain and wide‐angle beam scanning

“…To realize enhanced reflection coefficient, transmission coefficient, and gain, a graphene-based optical LWA is designed in. 24 To reduce the period length of the unit cell, LWAs based on microstrip rampart lines 25,26 and meandering slots 27,28 are investigated. In, 27,28 the composite right/left-handed (CRLH) transmission properties are obtained due to the meandering slots and thus the antennas can scan from backward to forward.…”

“…24 To reduce the period length of the unit cell, LWAs based on microstrip rampart lines 25,26 and meandering slots 27,28 are investigated. In, 27,28 the composite right/left-handed (CRLH) transmission properties are obtained due to the meandering slots and thus the antennas can scan from backward to forward. However, this type of LWAs suffer from the open-stop band (OSB) effect when the beam scans through the broadside, causing the degradation of the gain and the deterioration of the reflection coefficient at broadside frequency.…”

Dual‐Beam Leaky‐Wave Radiations with Independent Controls of Amplitude, Angle, and Polarization Based on SSPP Waveguide

“…[14][15][16][17][18][19][20][21][22] In addition, the SSPP leaky-wave antennas (LWAs) have attracted much attention in recent years, which have advantages of low profile, low cost, and flexible design. [23][24][25][26][27][28][29][30][31][32][33][34] As the rapid development of wireless communications, the technology of multibeam radiations and multipolarization modulations has attracted more and more attention and may find practical application in point-to-multipoint communications (e.g., satellite communications and personal terminals). Many efforts have been made to achieve dual-beam radiations of leaky waves, such as symmetrical side-beam radiations, [35] dual-beam radiations based on dual-mode SSPPs, [36] or multiperiod structures, [37,38] but these works were only limited to the single polarization.…”

A miniaturized CRLH based SIW leaky‐wave antenna for continuous backward‐to‐forward fast beam scanning with low side lobe levels

“…An endfire to near broadside scanning SIW LWA is proposed in Ali and Khan, 19 but it has quite large dimensions. Recently, different types of LWAs are proposed such as scanning rate enhanced LWA, 20 circularly polarized LWA, 21 compact spoof surface plasmon polariton LWA, 22 wide beam scanning LWA, 23 periodic microstrip LWA with highly stable gain, 24 dual‐polarized dual‐band LWA, 25 asymmetric meander line slot‐based X‐band LWA, 26 and so forth. However, most of the reported structures either have a smaller beam scanning range or larger dimensions.…”