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Paper Abstract and Keywords
Presentation 2017-11-30 14:35
Efforts toward Transmission Experiments Utilizing Transponder of 21-GHz Band on Broadcasting Satellite
Masafumi Nagasaka, Susumu Nakazawa, Hisashi Sujikai, Shoji Tanaka (NHK)
Abstract (in Japanese) (See Japanese page) 
(in English) The broadcasting satellite BSAT-4a was successfully launched on September 30th, 2017 (JST). BSAT-4a has a 21-GHz-band experimental transponder in addition to the 12-GHz-band broadcasting transponders using right- and left-hand circular polarization. We are planning to use the 21-GHz-band transponder for various experiments, for example, on wideband-transmission and rain-attenuation measurement. As one of the efforts toward the experiments, we fabricated a 21-GHz-band receiving antenna with a 1.5 m parabolic reflector. The receiving frequency is 21.4 to 22.0 GHz and the polarizations are right- and left-hand circular polarization. Measured results showed that the antenna gain and cross-polarization discrimination were more than 48 dBi and 32 dB, respectively. We also confirmed that the fabricated antenna satisfied the reference pattern of Rec. ITU-R BO.1900.
Keyword (in Japanese) (See Japanese page) 
(in English) Satellite Broadcasting / 21-GHz band / Satellite Transponder / Parabolic Antenna / Receiving Antenna / / /  
Reference Info. ITE Tech. Rep., vol. 41, no. 43, BCT2017-94, pp. 43-46, Nov. 2017.
Paper # BCT2017-94 
Date of Issue 2017-11-23 (BCT) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2017-11-30 - 2017-12-01 
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Paper Information
Registration To BCT 
Conference Code 2017-11-CS-IE-AVM-BCT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Efforts toward Transmission Experiments Utilizing Transponder of 21-GHz Band on Broadcasting Satellite 
Sub Title (in English)  
Keyword(1) Satellite Broadcasting  
Keyword(2) 21-GHz band  
Keyword(3) Satellite Transponder  
Keyword(4) Parabolic Antenna  
Keyword(5) Receiving Antenna  
1st Author's Name Masafumi Nagasaka  
1st Author's Affiliation NHK (NHK)
2nd Author's Name Susumu Nakazawa  
2nd Author's Affiliation NHK (NHK)
3rd Author's Name Hisashi Sujikai  
3rd Author's Affiliation NHK (NHK)
4th Author's Name Shoji Tanaka  
4th Author's Affiliation NHK (NHK)
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Speaker Author-1 
Date Time 2017-11-30 14:35:00 
Presentation Time 25 minutes 
Registration for BCT 
Paper # BCT2017-94 
Volume (vol) vol.41 
Number (no) no.43 
Page pp.43-46 
Date of Issue 2017-11-23 (BCT) 

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