High Gain Periodic 2-D Leaky-Wave Antenna With Backward Radiation for Millimeter-Wave Band

Abdullah Attar,Abdel Razik Sebak

doi:10.1109/ojap.2020.3043634

Abdullah Attar, Abdel Razik Sebak

Open Access

https://doi.org/10.1109/ojap.2020.3043634

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Abstract

A two-dimensional (2D) periodic leaky-wave antenna (LWA) is proposed in this article. Using dielectric-filled wedge-like waveguide as medium for wave propagation, the quasi-TEM wave inside the guide is leaked through periodic rings of narrow slots, resulting in high gain frequency-dependent beam. Due to the two-dimensional nature of the antenna, along with the slots distribution, the radiation has low side lobe level (SLL) without the need to extend the length of the antenna as in the case of periodic one-dimensional (1D) LWA. The measured gain of the antenna is 20.34 dBi with SLL less than −13 dB and cross-polarization less the −28 dB. The antenna is proposed for millimeter-wave (mm-Wave) applications.

Highlights

A S THE continuous use of videos and the Internet-ofThings (IoT) has resulted in noticeable wireless data traffic’s increment rate [1], the utilization of millimeter wave frequencies, which offers large spectrum bandwidth, has been set on motion [1]
Uniform leaky-wave antenna (LWA) radiate in the forward quadrant, able to scan from near-broadside to near-end fire, and have fast wave dominant mode (β < k0) that leaks at the discontinuities [2]
Periodic LWAs, on the other hand, radiates in both backward and forward quadrants. They are able to scan from the end fire of backward quadrant toward partial of the forward quadrant excluding a narrow region around the broadside

Summary

INTRODUCTION

A S THE continuous use of videos and the Internet-ofThings (IoT) has resulted in noticeable wireless data traffic’s increment rate [1], the utilization of millimeter wave (mm-Wave) frequencies, which offers large spectrum bandwidth, has been set on motion [1]. The slots in the left side were loaded with dielectric materials to add phase delay between both sides With this method, the antenna achieves 14.2 dBi gain with total efficiency of 98% and low grating lobe of −13 dB and low cross-polarization of −15 dB at 26.5 GHz. Yet the SLL of this antenna is high (−3 dB for measured results and −5 dB for simulated one) and it has moderate bandwidth of 7.6% (from 25 GHz to 26.5 GHz). Using air-filled double ridge corrugated waveguide, Yang et al in [9] proposed low SLL composite right/left-handed (CRLH) leaky-wave antenna This antenna, has low back lobe (−25 dB), very low cross-polarization (−50 dB), high gain and radiation efficiency (19.5 dBi and 75%, respectively), and good impedance bandwidth and scanning range (15.8% and 51◦, respectively).

ANTENNA DESIGN

Findings

DISCUSSION

CONCLUSION