Mutual Coupling Reduction between Closely-Placed MSAs for Bi-Static Radar Using Wave Absorber

Takenori YASUZUMI; Koudai TAKAHASHI; Naoki SANO; Ryosuke SUGA; Osamu HASHIMOTO

doi:10.1587/transele.E96.C.77

Mutual Coupling Reduction between Closely-Placed MSAs for Bi-Static Radar Using Wave Absorber

Takenori YASUZUMI, Koudai TAKAHASHI, Naoki SANO, Ryosuke SUGA, Osamu HASHIMOTO

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This paper presents a new simple method for reducing mutual coupling between dual-element microstrip antennas (MSAs) for bistatic radar using a wave absorber. The two elements are closely placed on a substrate by the distance of λ₀/4 through the wall-shaped absorber. The height and width of the absorber were optimized for minimum mutual coupling with the electromagnetic simulator. It was found that less than -60 dB minimum mutual coupling can be achieved by the impedance matching of the absorber in a near field. The influence for the reflection characteristics from the absorber is small enough, and the reduction of the antenna gain is only 1.1 dB. The rate of the lost power characteristics showed that the absorption improves the mutual couplings. Then the proposed structure for a practical configuration was investigated. The measurement results of the optimized structure tallied well with the simulation results.

Publication: IEICE TRANSACTIONS on Electronics Vol.E96-C No.1 pp.77-83

Publication Date: 2013/01/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E96.C.77

Type of Manuscript: PAPER

Category: Microwaves, Millimeter-Waves

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Takenori YASUZUMI, Koudai TAKAHASHI, Naoki SANO, Ryosuke SUGA, Osamu HASHIMOTO, "Mutual Coupling Reduction between Closely-Placed MSAs for Bi-Static Radar Using Wave Absorber" in IEICE TRANSACTIONS on Electronics, vol. E96-C, no. 1, pp. 77-83, January 2013, doi: 10.1587/transele.E96.C.77.
Abstract: This paper presents a new simple method for reducing mutual coupling between dual-element microstrip antennas (MSAs) for bistatic radar using a wave absorber. The two elements are closely placed on a substrate by the distance of λ₀/4 through the wall-shaped absorber. The height and width of the absorber were optimized for minimum mutual coupling with the electromagnetic simulator. It was found that less than -60 dB minimum mutual coupling can be achieved by the impedance matching of the absorber in a near field. The influence for the reflection characteristics from the absorber is small enough, and the reduction of the antenna gain is only 1.1 dB. The rate of the lost power characteristics showed that the absorption improves the mutual couplings. Then the proposed structure for a practical configuration was investigated. The measurement results of the optimized structure tallied well with the simulation results.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E96.C.77/_p

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@ARTICLE{e96-c_1_77,
author={Takenori YASUZUMI, Koudai TAKAHASHI, Naoki SANO, Ryosuke SUGA, Osamu HASHIMOTO, },
journal={IEICE TRANSACTIONS on Electronics},
title={Mutual Coupling Reduction between Closely-Placed MSAs for Bi-Static Radar Using Wave Absorber},
year={2013},
volume={E96-C},
number={1},
pages={77-83},
abstract={This paper presents a new simple method for reducing mutual coupling between dual-element microstrip antennas (MSAs) for bistatic radar using a wave absorber. The two elements are closely placed on a substrate by the distance of λ₀/4 through the wall-shaped absorber. The height and width of the absorber were optimized for minimum mutual coupling with the electromagnetic simulator. It was found that less than -60 dB minimum mutual coupling can be achieved by the impedance matching of the absorber in a near field. The influence for the reflection characteristics from the absorber is small enough, and the reduction of the antenna gain is only 1.1 dB. The rate of the lost power characteristics showed that the absorption improves the mutual couplings. Then the proposed structure for a practical configuration was investigated. The measurement results of the optimized structure tallied well with the simulation results.},
keywords={},
doi={10.1587/transele.E96.C.77},
ISSN={1745-1353},
month={January},}

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TY - JOUR
TI - Mutual Coupling Reduction between Closely-Placed MSAs for Bi-Static Radar Using Wave Absorber
T2 - IEICE TRANSACTIONS on Electronics
SP - 77
EP - 83
AU - Takenori YASUZUMI
AU - Koudai TAKAHASHI
AU - Naoki SANO
AU - Ryosuke SUGA
AU - Osamu HASHIMOTO
PY - 2013
DO - 10.1587/transele.E96.C.77
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E96-C
IS - 1
JA - IEICE TRANSACTIONS on Electronics
Y1 - January 2013
AB - This paper presents a new simple method for reducing mutual coupling between dual-element microstrip antennas (MSAs) for bistatic radar using a wave absorber. The two elements are closely placed on a substrate by the distance of λ₀/4 through the wall-shaped absorber. The height and width of the absorber were optimized for minimum mutual coupling with the electromagnetic simulator. It was found that less than -60 dB minimum mutual coupling can be achieved by the impedance matching of the absorber in a near field. The influence for the reflection characteristics from the absorber is small enough, and the reduction of the antenna gain is only 1.1 dB. The rate of the lost power characteristics showed that the absorption improves the mutual couplings. Then the proposed structure for a practical configuration was investigated. The measurement results of the optimized structure tallied well with the simulation results.
ER -