volume | PIER Journals

2024-04-29

A Compact Four Port High-Isolation SIW-Backed Self-Quadruplexing Antenna with a Swastik Shaped Slot for C Band Applications

Anil Kumar Katta,

Dr. Anil Kumar Katta

Department of ECE, AU College of Engineering

Andhra University

India

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Praveen Babu Choppala

Dr. Praveen Babu Choppala

Department of ECE, AU College of Engineering(A)

Andhra University

India

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Progress In Electromagnetics Research C, Vol. 143, 57-66, 2024

doi:10.2528/PIERC24022702

Abstract

A compact planar self-quadruplexing antenna backed with the SIW technology with high isolation between the input ports is designed and demonstrated for the simultaneous quad-band operation of the antenna. The SIW cavity is integrated with a Swastik shaped slot and two metallic vias to generate four distinct frequency bands with high gain and low cross polarization. Utilizing four distinct orthogonal patches with different lengths, each independently connected to a 50-Ω microstrip feed line, makes the antenna operate at four frequency bands of 4.8, 5.5, 6.6, and 7.6 GHz. The minimum value of Front-To-Back-Ratio (FTBR) is 18 dB, and the minimum isolation between the input ports is 28.4 dB. The measured values of peak gains in the frequency bands 4.8, 5.5, 6.6 and 7.6 GHz are 5.05, 6.20, 6.45 and 6.32 dBi, respectively. Hence, a single antenna consists of four signals transmitting or receiving simultaneously from four individual input ports without interfering with each other and with high isolation between the input ports confirms the self-quadruplexing property of the antenna. This antenna configuration enables the independent tuning of each resonant frequency according to specific application needs by manipulating a single parameter, that is the length of the patch and without disturbing other performance parameters of the antenna. To validate the simulation results, the antenna is fabricated and tested. The measurement findings match the simulation results closely, which confirms the quad-band operation of the antenna design. Simple configuration, compact size, high gain, and low cross polarization of the antenna make the proposed planar antenna suitable for practical multiband applications and for handheld transceivers with high isolation between the input ports.

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Anil Kumar Katta, and Praveen Babu Choppala, "A Compact Four Port High-Isolation SIW-Backed Self-Quadruplexing Antenna with a Swastik Shaped Slot for C Band Applications," Progress In Electromagnetics Research C, Vol. 143, 57-66, 2024.
doi:10.2528/PIERC24022702

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