Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas

A new beam scanning method of a Fabry–Perot cavity (FPC) antenna is proposed. To obtain high gain in a target direction with a reduced sidelobe level (SLL), we devised a tapered partially reflective surface (PRS) as a superstrate. Moreover, to attain various beam scanning directions, a phase-control...

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Main Authors: Wook Jang, Yeong-geun Jeon, Han-jun Maeng, Jongyeong Kim, Dongho Kim
Format: Article
Language:English
Published: MDPI AG 2021-11-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/11/22/11005
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author Wook Jang
Yeong-geun Jeon
Han-jun Maeng
Jongyeong Kim
Dongho Kim
author_facet Wook Jang
Yeong-geun Jeon
Han-jun Maeng
Jongyeong Kim
Dongho Kim
author_sort Wook Jang
collection DOAJ
description A new beam scanning method of a Fabry–Perot cavity (FPC) antenna is proposed. To obtain high gain in a target direction with a reduced sidelobe level (SLL), we devised a tapered partially reflective surface (PRS) as a superstrate. Moreover, to attain various beam scanning directions, a phase-controllable artificial magnetic conductor (AMC) ground plane with a broad reflection phase range and high reflection magnitudes was introduced. In the proposed method, a new formula to satisfy an FP resonance condition in a cavity for a scanned beam is also suggested. According to the formula, the FPC antenna can precisely scan the main beam in designed target directions with well-maintained high gain, which has been hardly achievable. In addition, our method demonstrates the potential of electrical beam-scanning antennas by employing active RF chips on the AMC cells. To validate the method, we fabricated a prototype FPC antenna for a scanned beam at <i>θ</i> = 30°. Furthermore, we conducted an additional simulation for a different beam scanning angle as well. Good agreement between the expected and experimental results verifies our design approach.
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spelling doaj.art-1419df4d3dee4ef79a639acb9eb663e02023-11-22T22:22:12ZengMDPI AGApplied Sciences2076-34172021-11-0111221100510.3390/app112211005Novel Beam Scan Method of Fabry–Perot Cavity (FPC) AntennasWook Jang0Yeong-geun Jeon1Han-jun Maeng2Jongyeong Kim3Dongho Kim4Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, KoreaDepartment of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, KoreaDepartment of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, KoreaThe Specific Radar Team, Hanwha Systems, 491-23, Gyeonggidong-ro, Namsa-myeon, Cheoin-gu, Yongin-si 17121, Gyeonggi-do, KoreaDepartment of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, KoreaA new beam scanning method of a Fabry–Perot cavity (FPC) antenna is proposed. To obtain high gain in a target direction with a reduced sidelobe level (SLL), we devised a tapered partially reflective surface (PRS) as a superstrate. Moreover, to attain various beam scanning directions, a phase-controllable artificial magnetic conductor (AMC) ground plane with a broad reflection phase range and high reflection magnitudes was introduced. In the proposed method, a new formula to satisfy an FP resonance condition in a cavity for a scanned beam is also suggested. According to the formula, the FPC antenna can precisely scan the main beam in designed target directions with well-maintained high gain, which has been hardly achievable. In addition, our method demonstrates the potential of electrical beam-scanning antennas by employing active RF chips on the AMC cells. To validate the method, we fabricated a prototype FPC antenna for a scanned beam at <i>θ</i> = 30°. Furthermore, we conducted an additional simulation for a different beam scanning angle as well. Good agreement between the expected and experimental results verifies our design approach.https://www.mdpi.com/2076-3417/11/22/11005Fabry–Perot cavity (FPC) antennaartificial magnetic conductor (AMC)partially reflective surface (PRS)beamforminghigh gainbeam scanning
spellingShingle Wook Jang
Yeong-geun Jeon
Han-jun Maeng
Jongyeong Kim
Dongho Kim
Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
Applied Sciences
Fabry–Perot cavity (FPC) antenna
artificial magnetic conductor (AMC)
partially reflective surface (PRS)
beamforming
high gain
beam scanning
title Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
title_full Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
title_fullStr Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
title_full_unstemmed Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
title_short Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas
title_sort novel beam scan method of fabry perot cavity fpc antennas
topic Fabry–Perot cavity (FPC) antenna
artificial magnetic conductor (AMC)
partially reflective surface (PRS)
beamforming
high gain
beam scanning
url https://www.mdpi.com/2076-3417/11/22/11005
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