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2026-04-27 Latest Published

Performance Evaluation of a Dual-Band h-Shaped Metamaterial Perfect Absorber with Polarization-Insensitive Characteristics for Satellite Communication Applications
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By Vanam Chinna Narasimhulu Govardhani Immadi Madhavareddy Venkata Narayana

Progress In Electromagnetics Research M, Vol. 138, 10-21, 2026

doi:10.2528/PIERM26010103 | Google Scholar

Abstract

A compact, double split-ring H-shaped resonator-based polarization-independent dual-band metamaterial microwave absorber (MMA) with an outstanding absorption efficiency was designed and analyzed for satellite communication applications. The H-shaped resonator-based unit cell was printed on an FR4 material using copper as the conducting material. Copper material was chosen for the radiating patch and the ground plane. A detailed parametric analysis was performed by tuning the geometrical parameters of the H-shaped MMA to achieve dual absorption bands with broad bandwidth and high absorptivity. The recommended H-shaped absorber exhibits dual absorption bandwidths of 710 MHz and 1630 MHz with FBW of 22.95% and 19.35%. Furthermore, it maintains an absorptivity of greater than 90% across the entire spectrum of dual operating bands with almost perfect absorption of 99.99% at the resonant frequencies (3.17 GHz, 7.78 GHz) of each band. The MMA maintains an area of 0.09λ × 0.09λ. A simulated absorber model was fabricated, and the results have been tested using an Anritsu Combinational Analyzer (MS2037C) for experimental validation. The simulated and tested outcomes of the developed prototype are in strong alignment, rendering the absorber suitable for S-band and LEO and geostationary satellite uplinks/downlinks, with specific bands often at 7.145-7.235 GHz (uplink) and 8.4-8.5 GHz (downlink).

2026-04-27

PIER M

Vol. 138, 10-21, 2026

doi:10.2528/PIERM26010103

download: 37

Performance Evaluation of a Dual-Band h-Shaped Metamaterial Perfect Absorber with Polarization-Insensitive Characteristics for Satellite Communication Applications

Vanam Chinna Narasimhulu, Govardhani Immadi and Madhavareddy Venkata Narayana

2026-04-14

PIER M

Vol. 138, 1-9, 2026

doi:10.2528/PIERM26021201

download: 99

A Dual-Band Shared-Aperture Antenna Employing a Meshed Patch and AMC-Backed Fabry-Perot Cavity

Chaoyuan Guo, Zhihan Liu and Yufeng Liu

A low-profile, dual-band, shared-aperture antenna with a large frequency ratio is presented, based on a meshed patch and an AMC-backed Fabry-Perot (F-P) cavity. By taking advantage of the weak frequency sensitivity of grid slotting in meshed patches, the upper meshed patch is utilized as both the parasitic patch for the low-frequency antenna and the partially reflective surface (PRS) for the high-frequency F-P cavity, thereby simplifying the overall structure. Meanwhile, the AMC ground is employed to control the reflection phase and reduce the cavity height to λ/4, which enables both antennas to share the same aperture within an 8-mm profile. A prototype is fabricated and tested at 1.6 GHz and 15.14-15.46 GHz. Measured results demonstrate a frequency ratio of 1:9.6, a peak gain of 6.2 dBi at 1.6 GHz, a peak gain of 11.8 dBi in the high-frequency band, and a port isolation better than 17 dB. The proposed antenna features compact size, low profile, and efficient structural reuse, making it attractive for integrated multi-band communication systems.