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Design and fabrication of a high gain, low cost, LHCP Fabry‐Perot antenna at Ku band
Author(s) -
Azizi Yousef,
Komjani Nader,
Karimipour Majid
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31539
Subject(s) - polarizer , optics , antenna gain , return loss , antenna (radio) , materials science , grating , microstrip antenna , optoelectronics , physics , antenna factor , engineering , electrical engineering , birefringence
A single‐layer left‐handed circularly polarized (CP) Fabry‐Perot cavity antenna (FPCA) with stable gain performance around at the center frequency is designed, fabricated and tested at 14.5 GHz. The FPCA is fed by a linearly polarized (LP) microstrip patch aligned along slant 45° and is composed of single‐layer double‐sided top layer, which is designed to act as partially reflecting surface (PRS) and polarizer simultaneously, and a high impedance surface (HIS) as a ground layer. Several classes of unit cell configurations are investigated for top layer of FPCA to meet the requirements of CP behavior of antenna on the best form. Employing the transmission line model, the design process of PRS and polarizer is accelerated. It is done by estimating the initial value of unit cell parameters. Circuit model of unit cell configurations is introduced to ADS software and corresponding value of the element dimensions are optimized based on desired reflection and transmission coefficients of PRS which are essentially enforced by well‐known ray optics model. After optimizing design parameters of PRS in CST MWS by considering periodic boundary condition to account for mutual coupling effects and also tuning the HIS layer dimension to satisfy the resonance condition, the final structure can be assembled and simulated that have a 16.5 dB peak gain and good performance. Measurement results show that the antenna has roughly 15 dBi peak gain, the axial ratio (AR), return loss and 3 dB realized gain bandwidths (BW) of 7%, 1.7%, and 5%, respectively, at 14.5 GHz which are good achievements.