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Branch Line Coupler Inspired Circularly Polarized Leaky-Wave Antenna with Broadside Scanning
Journal
2022 16th European Conference on Antennas and Propagation, EuCAP 2022
Date Issued
2022-01-01
Author(s)
Ahmad, Ayaz
Pandey, Vishakha
Kumar, Busineni Mahesh
Mukherjee, Jayanta
Abstract
In this work, a new microstrip circularly polarized leaky-wave antenna is presented for X-band applications. The design of the proposed leaky-wave antenna is inspired by the conventional 3 dB branch-line coupler. The geometry of the unit cell of the proposed leaky-wave antenna is realized by removing the two collinear feed lines of the branchline coupler. The open stopband is eliminated by optimizing the geometry. The proposed leaky-wave antenna provides impedance bandwidth with | S11 | <-10 dB between 8.2-11.1 GHz. The bandwidth corresponding to axial ratio < 3 dB is 9.4-10.3 GHz. The antenna radiates in the broadside at 9.9 GHz with 14.1 dBic gain.
Subjects