High Isolation Dual-Polarized SISL Antenna with Out-of-Band Rejection Improvement Using Artificial Magnetic Conductor

High Isolation Dual-Polarized SISL Antenna with Out-of-Band Rejection Improvement Using Artificial Magnetic Conductor

This paper proposes a dual-polarized differential-fed substrate integrated suspended line (SISL) patch antenna with out-of-band rejection level using an artificial magnetic conductor structure. By etching vertical and horizontal symmetrical slots A on an electromagnetically-coupled square patch ante...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters pp. 1 - 5
Main Authors: A, Shaawanatu, Yan, Ningning, Luo, Yu, Ma, Kaixue, Bello, Isah, Moro, Eric Newton, M.S, Abubakar
Format: Journal Article
Language:English
Published: IEEE 12-06-2024
Subjects:
Antenna feeds
Antennas
Artificial magnetic conductor
Conductors
differential-fed
dual-polarized
Filtering
Gain
Magnetic resonance
Magnetic separation
out-of-band rejection level
radiation nulls
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Summary:This paper proposes a dual-polarized differential-fed substrate integrated suspended line (SISL) patch antenna with out-of-band rejection level using an artificial magnetic conductor structure. By etching vertical and horizontal symmetrical slots A on an electromagnetically-coupled square patch antenna with vias connecting patch and feeding line to help the slots maintain good filtering selectivity, an additional resonance (f r2 ) is excited with lower radiation null (f n1 ) and the cancellation of the horizontal current on the radiating patch (RP) generated upper radiation null (f n2 ). On the other hand, a stacked patch (SP) provides upper radiation nulls f n3 , and a 4 × 4 artificial magnetic conductor (AMC) structure further enhances the antenna's rejection level at the upper band edge. The simulated and measured results show that an impedance bandwidth (IBW) of 21.9% (2.93-3.65 GHz) is achieved with a compact size of 0.55λ0 × 0.55λ 0 × 0.06λ 0 (λ 0 is the free-space wavelength at the center frequency). An out-of-band rejection level higher than 17.2 dB and 28.2 dB is obtained at lower and upper bands, respectively, with a maximum gain of approximately 8.2 dBi, and stable radiation patterns are realized within the passband.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2024.3414182