论文信息 - Dual Circularly Polarization X band 2Gbps Downlink Communication System of Earth Observation Satellite

Dual Circularly Polarization X band 2Gbps Downlink Communication System of Earth Observation Satellite

We are developing 2.8Gbps down link in X band (8025-8350MHz) from small SAR observation satellites. The modulation is 64APSK of DVB-S2X with symbol rate of 300Msps. Dual polarization channels are applied to the system. We have tested an engineering model of the transmitter, and the on-board antenna with high crosspolarization discrimination (XPD). The ground antenna with high XPD is also developed. This down link system will be demonstrated in 2019 by JAXA advanced small satellite.

Hirobumi Saito | Makoto Mita | Tomoki Kaneko | Yasuhiro Ohikata

[1] Ming Chen,et al. A wide-band square-waveguide array polarizer , 1973 .

[2] Takashi Kitsuregawa,et al. Advanced technology in satellite communication antennas: Electrical and mechanical design , 1990 .

[3] Zhou Hao,et al. Very Low Earth Orbit mission concepts for Earth Observation: Benefits and challenges. , 2014 .

[4] Sang Gyu Lee,et al. Depolarization Mitigation using Frequency Offset in the Dual-Polarized X-Band for EESS , 2006, 2006 International Workshop on Satellite and Space Communications.

[5] Zhensen Wu,et al. Analytic Specific Attenuation Model for Rain for Use in Prediction Methods , 2001 .

[6] H. Saito,et al. Dual circularly polarization antenna with High XPD for downlink communication of earth observation sateliite , 2017, 2017 IEEE Conference on Antenna Measurements & Applications (CAMA).