Vol. 115

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2021-08-30

T-Shaped Tri-Band Antenna Based on Characteristic Mode Analysis for Satellite Applications

By Fateh Lal Lohar, Indra Bhooshan Sharma, Virender Katewa, and Mahendra Mohan Sharma
Progress In Electromagnetics Research C, Vol. 115, 65-80, 2021
doi:10.2528/PIERC21072203

Abstract

This article presents a T-Shaped Tri-Band (TSTB) antenna based on the Characteristic Mode Analysis (CMA) for satellite applications. Tri-band characteristics are achieved by exciting two orthogonal radiating modes for the L5-band and L1-bands, and one higher order radiating mode for the S-band. Initially, cavity model theory is applied to a rectangular antenna to calculate orthogonal modes (TMz010 & TMz001) at L5-band and S-bands, and these modes are validated using the CMA method. With the help of surface current study and modification of a rectangular antenna, the one higher order radiating mode and orthogonal modes are excited by using the CMA method. All desirable radiating modes are excited by a single coaxial feed line in full-wave simulation, which is based on FIT (Finite Integration Technique). The proposed antenna's measured operating frequencies are 1575 MHz (L1-band) for GPS (Global Positioning System) system, 1174 MHz (L5-band), and 2495 MHz (S-band) for IRNSS (Indian Regional Navigation Satellite System) applications, and corresponding impedance bandwidths at S11 ≤ -10 dB are 24 MHz (1563-1587 MHz), 24 MHz (1164-1188 MHz), and 51 MHz (2484-2535 MHz), respectively. The proposed antenna layout is printed on low-cost FR4 material and exhibits good agreement between simulated and measured results using CST and HFSS EM-tool. The proposed antenna is single feed, low profile, and economical with stable broadside radiation patterns along with good gain.

Citation


Fateh Lal Lohar, Indra Bhooshan Sharma, Virender Katewa, and Mahendra Mohan Sharma, "T-Shaped Tri-Band Antenna Based on Characteristic Mode Analysis for Satellite Applications," Progress In Electromagnetics Research C, Vol. 115, 65-80, 2021.
doi:10.2528/PIERC21072203
http://jpier.org/PIERC/pier.php?paper=21072203

References