A novel earth station antenna concept for Ku-band mobile satellite communication systems - Distributed array antenna and key technologies

We have proposed a distributed array antenna (DAA) system for high-speed satellite communications. The DAA system uses multiple small tracking antennas and combines the transmission signals in-phase to increase the antenna gain. DAA system has a problem that the undesired radiation at the sidelobe direction increases as the antenna gain at the main lobe direction increases. In the mobile environment, the conventional technique can suppress the undesired radiation in the limited condition because of changing the direction of the undesired radiation according to the movement of the mobile station. This paper proposes a DAA technique that suppresses the undesired radiation by setting a transmission plate at each antenna aperture and moving them via adaptive control. The transmission plate consisting of a metal patch or slot retransmits electromagnetic waves and changes the amplitude and phase of the waves. To change the radiation patters of each antenna, the transmission plate rotates according to movement of the mobile station. After combining these changed signals, the adaptive control selects the rotate angle of the transmission plate to decrease the undesired radiation at the sidelobe direction. The antenna gain on the main lobe direction after combining is achieved with lower loss because the insertion loss through the transmission plate is smaller. The proposed technique offers more than $2.4$ dB improvement with three antennas and more than $3.5$ dB improvement with four antennas assuming each consists of $8 ¥times 8$ patches.

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“…distributed array antenna (DAA) system; it combines multiple small antennas to create a larger virtual antenna aperture [2].…”

Section: Introductionmentioning

confidence: 99%

Undesired Radiation Suppression Technique with Adaptive Control for Distributed Array Antenna Systems in Mobile Environment

Kouhei

Goto

2020

J. commun. softw. syst. (Online)

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Evaluations for Estimation Method of the Distributed Array Antenna (DAA) Radiation Pattern by Experimental Analysis

Goto

Yamashita

Kouhei

et al. 2018

IEICE Trans. Commun.

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Novel Polarization-Tracking-Free Mobile Satellite Communication Systems and On-Ground Polarization-Forming Technique

Suzuki

Sugiyama

Kobayashi

2012

IEICE Trans. Commun.

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A novel earth station antenna concept for Ku-band mobile satellite communication systems - Distributed array antenna and key technologies

Cited by 5 publications

References 1 publication

Undesired Radiation Suppression Technique with Adaptive Control for Distributed Array Antenna Systems in Mobile Environment

Undesired Radiation Suppression Technique with Adaptive Control for Distributed Array Antenna Systems in Mobile Environment

Evaluations for Estimation Method of the Distributed Array Antenna (DAA) Radiation Pattern by Experimental Analysis

Novel Polarization-Tracking-Free Mobile Satellite Communication Systems and On-Ground Polarization-Forming Technique

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