Substrate Integrated Waveguide based Leaky Wave Antenna

Abstract

Leaky Wave Antennas (LWAs) allow electromagnetic wave to leak along its structure. LWAs being low profile have been effortless to fabricate. The SIW can be designed by inserting two rows of metallic via on a dielectric material which work as a wall to prevent the radiation. CRLH property can be generated by cutting the slot on the upper stub which provide the capacitance.In this paper, a periodic CRLH based C-shaped SIW-LWA is proposed which operates in a single band between the frequencies of 13.2 to 15.5 GHz. With the help of SIW and CRLH property designed antenna scans in continuous backward to forward direction with suppressed stop band. This paper shows a substrate integrated waveguide (SIW) based on leaky wave antenna (LWA) including better gain, efficiency and backward to forward beam steering. The periodic C-shaped slot substrate integrated waveguide leaky wave antenna (SIW-LWA) are made-up and the calculated and replicated results acknowledges marvellously. It seems that there is a good contract between them. The beam steering of SIW-LWA is from-60 degree to 29 degree when frequency sweeps from 13.2 GHz to 15.5 GHz. The SIW-LWA offers the peak value of gain as 5.733 dB and peak value of efficiency are 77.545%. The broad side radiation will be at 14 GHz. Below 14 GHz the antenna works as a LH material and scans negative angles and above 14 GHz antenna works as RH material and scans positive angle.This antenna, substrate integrated waveguide leaky wave antenna (SIW-LWA), is proposed only to obtained better beam steering so as to use for such application where beam scanning is used.