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A dual capacitively fed broadband patch antenna with reduced cross‐polarization radiation
Author(s) -
Hsu WenHsiu,
Wong KinLu
Publication year - 2000
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 - 10.1002/1098-2760(20000805)26:3<169::aid-mop10>3.0.co;2-x
Subject(s) - microstrip antenna , patch antenna , capacitive sensing , ground plane , electrical engineering , radiation , antenna efficiency , optoelectronics , antenna measurement , microwave , broadband , optics , materials science , physics , engineering , antenna (radio) , telecommunications
This paper presents a design using dual capacitive feeds to excite a patch antenna with a thick air substrate to achieve a wide operating bandwidth with reduced cross‐polarization radiation. The dual capacitive feeds are fed by equal input powers, but with a 180° phase shift, and have a narrow conducting strip placed below the radiating patch, supported by a conducting post, which is then connected, through via holes in the ground plane, to the microstrip feed network. Experimental results show that the proposed antenna can have greatly reduced cross‐polarization radiation across the entire operating bandwidth, compared to the case with a single capacitive feed. Details of the proposed antenna and experimental results are presented. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 26: 169–171, 2000.