Long Slot Ridged SIW Leaky Wave Antenna Design Using Transverse Equivalent Technique

TL;DR

This paper introduces a novel ridged SIW leaky wave antenna with controllable side lobe levels and low cross-polarization, achieved through a transverse equivalent network analysis and validated by measurements.

Contribution

It presents a new ridged SIW LWA design with an accurate transverse equivalent analysis and demonstrates its effectiveness through theoretical, numerical, and experimental validation.

Findings

Good side lobe level and low cross polarization achieved

Theoretical and numerical wavenumber calculations match measurements

Design shows consistent performance in simulations and experiments

Abstract

A novel ridged SIW leaky wave antenna (LWA) with controllable side lobe level and low cross-polarization is proposed and fabricated. Longitudinally continuous asymmetric ridges beside SIW sidewalls provide an asymmetric field distribution around the long slot centered on the upper plane of the structure, in way that the slot can radiate. An accurate transverse equivalent network analysis is presented for calculating the properties of the proposed LWA. The wavenumbers of the leaky-mode are calculated theoretically and numerically. The designed ridged SIW LWA shows a good SLL and cross polarization. Measurement results are also consistent with the simulation results.