volume | PIER Journals

2018-06-04

Planar Cavity-Backed Self-Diplexing Antenna Using Two-Layered Structure

Arvind Kumar,

Mr. Arvind Kumar

ECE

NIT

India

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Singaravelu Raghavan

Dr. Singaravelu Raghavan

Department of Electronics and Communication Engineering

National Institute of Technology (NIT)

India

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Progress In Electromagnetics Research Letters, Vol. 76, 91-96, 2018

doi:10.2528/PIERL18031605 | Google Scholar

Abstract

A design of a half-mode substrate integrated waveguide (HMSIW) cavity-backed self-diplexing antenna is proposed with a two-layer structure. The top layer comprises two HMSIW based cavities, and radiating patches are etched on the top-cladding of each cavity. The radiating patches are excited by two distinct printed microstrip lines on the backside of the bottom layer by using shorting-pins. The shorting-pin excites the corresponding cavity in its dominant mode, which resonates at two different frequencies in X-band. The simulated results demonstrate that the proposed design resonates at 8.20 GHz and 10.55 GHz with an isolation of higher than -25 dB between two excitations, which helps to introduce the self-diplexing phenomenon. Also, both resonant frequencies can be tuned independently by varying the dimensions of the corresponding cavity. Moreover, HMSIW cavity-backed structure and proposed feeding technique reduce the overall size of the antenna significantly, while it maintains high gain and unidirectional radiation characteristics for both operating frequencies.

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Arvind Kumar, and Singaravelu Raghavan, "Planar Cavity-Backed Self-Diplexing Antenna Using Two-Layered Structure," Progress In Electromagnetics Research Letters, Vol. 76, 91-96, 2018.
doi:10.2528/PIERL18031605

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