Polarization Reconfigurable High-Gain Fabry-Perot Cavity Antenna

We propose an innovative polarization reconfigurable high-gain Fabry-Perot cavity (FPC) antenna. The antenna can electrically select its polarization among three linear polarization (LP) modes of x -, y -, and 45°-direction with stable high gain. To achieve these properties, we devise a novel pola...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-09, Vol.70 (9), p.7727-7734
Main Authors: Jeon, Yeong-Geun, Yun, Gwang-Ro, Kim, Jongyeong, Kim, Dongho
Format: Article
Language:English
Subjects:
Antenna design
Antenna feeds
Antenna gain
Antennas
Conversion
Fabry-Perot interferometers
Fabry–Perot (FP) resonance
Fabry–Perot cavity (FPC) antenna
Gain
Ground plane
High gain
Impedance
Impedance matching
Linear polarization
p-i-n diode
partially reflective surface (PRS) antenna
PIN photodiodes
polarization conversion
Polarizers
Reconfiguration
Reflection
Reflector antennas
Resonance
resonant cavity antenna
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Summary:We propose an innovative polarization reconfigurable high-gain Fabry-Perot cavity (FPC) antenna. The antenna can electrically select its polarization among three linear polarization (LP) modes of x -, y -, and 45°-direction with stable high gain. To achieve these properties, we devise a novel polarization conversion partially reflective surface (PCPRS) as a superstrate. The PCPRS plays two crucial roles simultaneously; it reconfigures antenna polarization and maintains high gain using an FP resonance between the PCPRS and a ground plane. The FP resonance, which is the key point in our antenna design, is essential to maximize both antenna gain and polarization reconfigurability. Therefore, in order to stably achieve the FP resonance for all three polarization modes, we have designed the PCPRS to keep its reflection behavior as constant as possible for all LP modes. To the best of our knowledge, this is the first FPC antenna introducing a partially reflective surface (PRS) which also functions as an active polarizer. Consequently, the proposed antenna attains remarkable polarization conversion performance with higher than 20 dB cross-polarization suppression level for all polarization modes. Moreover, in all modes, our antenna well maintains reasonably high gain of about 15 dBi with good impedance matching properties. Good agreement between measurements and simulations proves the validity of our design approach.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3162083