12- and 21-GHz Dual-Band Dual-Circularly Polarized Offset Parabolic Reflector Antenna Fed by Microstrip Antenna Arrays for Satellite Broadcasting Reception

Masafumi NAGASAKA  Masaaki KOJIMA  Hisashi SUJIKAI  Jiro HIROKAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E102-B   No.7   pp.1323-1333
Publication Date: 2019/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3257
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
reflector antenna,  microstrip antenna,  circular polarization,  dual band antenna,  dual polarized antenna,  

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Summary: 
In December 2018, satellite broadcasting for 4K/8K ultra-high-definition television (UHDTV) will begin in Japan. It will be provided in the 12-GHz (11.7 to 12.75GHz) band with right- and left-hand circular polarizations. BSAT-4a, a satellite used for broadcasting UHDTV, was successfully launched in September 2017. This satellite has not only 12-GHz-band right- and left-hand circular polarization transponders but also a 21-GHz-band experimental transponder. The 21-GHz (21.4 to 22.0GHz) band has been allocated as the downlink for broadcasting satellite service in ITU-R Regions 1 (Europe, Africa) and 3 (Asia Pacific). To receive services provided over these two frequency bands and with dual-polarization, we implement and evaluated a dual-band and dual-circularly polarized parabolic reflector antenna fed by 12- and 21-GHz-band microstrip antenna arrays with a multilayer structure. The antenna is used to receive 12- and 21-GHz-band signals from in-orbit satellites. The measured and experimental results prove that the proposed antenna performs as a dual-polarized antenna in those two frequency bands and has sufficient performance to receive satellite broadcasts.