Quarter Wavelength Fabry–Perot Cavity Antenna with Wideband Low Monostatic Radar Cross Section and Off-Broadside Peak Radiation

Umair, Hassan; Latef, Tarık Abdul; Yamada, Yoshıhıde; Hassan, Tayyab; Mahadi, Wan Nor Liza Binti Wan; Othman, Mohamadariff; Kamardin, Kamilia; Hussein, Mousa I.

doi:10.3390/app11031053

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…Military mobile platforms, such as naval ships and unmanned aerial vehicles, are equipped with multiple antenna systems operating on different frequency bands to perform various missions: radar, electronic warfare (EW), and communications [1][2][3]. However, the installation of multiple antennas often raises the radar detection rate, especially when more antennas are protruded from the body of the mobile platforms, due to increased radar cross sections [4][5][6][7]. Thus, active research has been carried out on a shared-aperture antenna (SAA) to integrate multiple antennas into a limited space below the surface for future mobile platforms [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Cross-Correlation-Based Approach to Pattern Distortion and Mutual Coupling for Shared-Aperture Antennas

et al. 2021

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This paper proposes a pattern distortion coefficient as a new figure of merit to quantitatively evaluate both mutual coupling and pattern distortions in multi-antenna systems. The proposed coefficient is defined as a cross correlation between unaffected and affected far-field patterns of antennas under test, and the input patterns are weighted using a Gaussian function to consider the target operation angle. The feasibility of the proposed approach is validated using a two-antenna system composed of an inverted-F antenna and a microstrip patch antenna, and the amount of mutual coupling is adjusted by changing the distance between the two antennas. The evaluation is further extended to a single-antenna system with a conducting wall that produces strong platform effects with serious pattern distortions. The results demonstrate that the proposed figure of merit provides quantitative insight into the amplitude and phase distortions of far-field patterns that can be caused by both mutual coupling and platform effects.

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Section: Introductionmentioning

confidence: 99%

A Cross-Correlation-Based Approach to Pattern Distortion and Mutual Coupling for Shared-Aperture Antennas

et al. 2021

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“…Research on PRS has been actively conducted in recent years, from the equivalent circuit model to the beam steering technique [ 16 , 17 , 18 ]. However, there are few cases of designing PRS shape considering polarization.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Partially Reflective Surface for Smart Blocks

Kim

Lee

et al. 2021

Sensors

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In general, a partially reflective surface (PRS) is mainly used to increase the gain of an antenna; some metallic objects placed on the PRS degrades the antenna performance because the objects change the periodic structure of the PRS. Herein, we propose a multifunctional PRS for smart block application. When a passenger passes over a smart block, the fare can be simultaneously collected and presented through the LED display. This requires high gain antenna with LED structure. The high gain characteristic helps the antenna identify passengers only when they pass over the block. The multifunctional PRS has a structure in which an LED can be placed in the horizontal direction while increasing the antenna gain. We used the antenna’s polarization characteristics to prevent performance deterioration when LED lines are placed in the PRS. We built the proposed antenna and measured its performance: At 2.41 GHz, the efficiency was 81.4%, and the antenna gain was 18.3 dBi. Furthermore, the half-power beamwidth was 18°, confirming a directional radiation pattern.

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“…Umair et al [13] offer a high-gain and compact antenna that offers both low backscattering and improved gain characteristics. The antenna's construction involves a cavity formed by combining an absorptive Frequency Selective Surface (FSS) with a double-sided Partially Reflective Surface (PRS), placed above a patch resonator.…”

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confidence: 99%