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Circularly polarized microstrip Yagi antenna array with tilted beam for improved monopulse characteristics
Author(s) -
Kong Deok Kyu,
Woo Daewoong,
Kim Jaesik,
Yoon Young J.
Publication year - 2020
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.32413
Subject(s) - optics , microstrip antenna , collinear antenna array , antenna array , coaxial antenna , dipole antenna , antenna measurement , antenna (radio) , patch antenna , monopulse radar , physics , axial ratio , turnstile antenna , microstrip , circular polarization , telecommunications , engineering , radar , radar imaging , continuous wave radar
An antenna array composed of four inclined microstrip Yagi antennas is proposed for a direction finding (DF) system operated in L band. Each element antenna is designed to have a tilted beam toward a central array axis in order to have high gain in the boresight axis of the antenna array. In comparison to a patch antenna array, having the same structure, antenna array gain is improved by a 2.3 dB maximum around the array axis, monopulse slope is increased by 72% and the linearity of the slope is improved significantly. Also, axial ratio is improved by 3 dB max within ±25° from boresight.