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Dual-Circularly Polarized Offset Parabolic Reflector Antenna with Microstrip Antenna Array for 12-GHz Band Satellite Broadcasting Reception

Masafumi NAGASAKA, Susumu NAKAZAWA, Shoji TANAKA

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Summary :

Japan Broadcasting Corporation (NHK) started test satellite broadcasting of ultra-high-definition television (UHDTV) on August 1st, 2016. The test broadcasting is being provided in the 12-GHz (11.7 to 12.75GHz) band with right-hand circular polarization. In 2018, left-hand circular polarization in the same frequency band will be used for satellite broadcasting of UHDTV. Because UHDTV satellite broadcasting uses the 16APSK modulation scheme, which requires a higher carrier-to-noise ratio than that used for HDTV in Japan, it is important to mitigate the cross-polarization interference. Therefore, we fabricated and tested a dual-circularly polarized offset parabolic reflector antenna that has a feed antenna composed of a 2×2 microstrip antenna array, which is sequentially rotated to enhance the polarization purity. Measured results showed that the fabricated antenna complied with our requirements, a voltage standing wave ratio of less than 1.4, antenna gain of 34.5dBi (i.e., the aperture efficiency was 69%), and cross-polarization discrimination of 28.7dB.

Publication
IEICE TRANSACTIONS on Communications Vol.E101-B No.2 pp.340-348
Publication Date
2018/02/01
Publicized
2017/08/22
Online ISSN
1745-1345
DOI
10.1587/transcom.2017ISP0012
Type of Manuscript
Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016)
Category
Antennas

Authors

Masafumi NAGASAKA
  Japan Broadcasting Corporation
Susumu NAKAZAWA
  Japan Broadcasting Corporation
Shoji TANAKA
  Japan Broadcasting Corporation

Keyword