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Paper Abstract and Keywords
Presentation 2017-07-27 10:35
Estimation of Cross-Polarization Discrimination Degradation of Ka-band Satellite Communication Signals due to Lightning Discharges
Yasuyuki Maekawa (Osaka Electro-Comm. Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Increase and decrease of rapid changes in cross-polarization discrimination (XPD) of Ka-band satellite radio wave caused by thunderstorm events are investigated using the beacon signal (19.45GHz, right-hand circular polarization) of CS-3 and N-Star observed at 1 or 0.1 sec intervals in Osaka Electro-Communication University, Neyagawa, Osaka, from 1990 to 2006. A considerable amount of rapid changes in XPD shows increase of XPD values, meaning decrease of depolarization, although the previous C-band low elevation angle observations conducted by the international satellite communications links primarily showed decrease of XPD values. This tendency is consistently explained examining the increase and decrease of the observed XPD and cross-polar phases, under the assumption of appropriate XPD and cross-polar phases due to the alignment and mean canting angles of ice crystals at the discharging point. Also, the XPD values and cross-polar phases are directly traced during the rapid changes at the discharging point using those measured at 0.1 sec interval. It is found that the XPD values due to the alignment of ice crystals disappear in about 0.5 sec, while the mean canting angles of ice crystals move from nearly vertical around 90°to horizontal around 0°in this short period.
Keyword (in Japanese) (See Japanese page) 
(in English) Satellite communications / Ka-band / Cross-polarization discrimination / Cross-polar phase / Lightning discharge / Rapid changes / Ice crystals / Canting angles  
Reference Info. IEICE Tech. Rep., vol. 117, no. 150, AP2017-53, pp. 47-50, July 2017.
Paper # AP2017-53 
Date of Issue 2017-07-19 (AP), 2017-07-20 (SAT) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP SAT SANE  
Conference Date 2017-07-26 - 2017-07-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Radio propagation, Antennas and Propagation, Sattelite Communication 
Paper Information
Registration To AP 
Conference Code 2017-07-AP-SAT-SANE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimation of Cross-Polarization Discrimination Degradation of Ka-band Satellite Communication Signals due to Lightning Discharges 
Sub Title (in English)  
Keyword(1) Satellite communications  
Keyword(2) Ka-band  
Keyword(3) Cross-polarization discrimination  
Keyword(4) Cross-polar phase  
Keyword(5) Lightning discharge  
Keyword(6) Rapid changes  
Keyword(7) Ice crystals  
Keyword(8) Canting angles  
1st Author's Name Yasuyuki Maekawa  
1st Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Comm. Univ.)
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Speaker
Date Time 2017-07-27 10:35:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2017-53,IEICE-SAT2017-9 
Volume (vol) IEICE-117 
Number (no) no.150(AP), no.152(SAT) 
Page pp.47-50(AP), pp.19-22(SAT) 
#Pages IEICE-4 
Date of Issue IEICE-AP-2017-07-19,IEICE-SAT-2017-07-20 


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