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Dual‐band dual‐sense circularly polarized antenna for S‐ and C‐band applications
Author(s) -
Tran Huy Hung,
Le Tuan Tu,
Nguyen Truong Khang
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.31546
Subject(s) - multi band device , axial ratio , circular polarization , physics , optics , bandwidth (computing) , wavelength , antenna (radio) , electrical engineering , telecommunications , microstrip , engineering
This paper presents a dual‐band dual‐sense circularly polarized (CP) antenna for S‐ and C‐band applications. A semicircular patch and a circular slot are first designed to achieve wide operation bandwidth in the C‐band with right‐hand CP (RHCP), and then, a curved slot is properly inserted around the circular slot for S‐band realization with left‐hand CP (LHCP). Final antenna prototype has an overall size of 0.32 λ L × 0.32 λ L × 0.01 λ L , where λ L is free‐space wavelength at the lowest CP frequency. Experimental results show that good CP characteristics for both RHCP and LHCP can be achieved. The measured −10 dB impedance bandwidth is from 2.2 to 6.5 GHz, equivalent to about 98.8%. Additionally, the measured 3 dB axial‐ratio bandwidths for lower and upper bands are, respectively, 4.9% (2.4‐2.52 GHz) and 40.8% (4.0‐6.05 GHz).