Title :
High performance dichroic design for orbiting VLBI Earth station antenna applications
Author :
Wu, T.K. ; Shillue, W.P.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
The National Radio Astronomy Observatory is constructing an Earth station at Green Bank to communicate with two orbiting VLBI satellites, RADIOASTRON and VSOP. The frequency allocations for the communication between this Earth station and the two satellites are in the X and Ku bands. To meet this dual-band communication requirement, the reflector antenna with a frequency selective surface (FSS) or dichoric has been selected. This FSS should be designed to reflect Ku-band signals (13.5 to 15.5 GHz) and to pass X-band signals (7 to 9 GHz). In order to reduce the antenna´s noise temperature, the RF loss (including the ohmic loss) of the FSS should also be minimized. The authors describe the selected FSS design and the good agreement between the predicted and measured FSS performance.<>
Keywords :
radiotelescopes; radiowave interferometry; reflector antennas; satellite antennas; satellite ground stations; 13.5 to 15.5 GHz; 7 to 9 GHz; Earth station antenna; FSS; Green Bank; Ku-band; National Radio Astronomy Observatory; RADIOASTRON; RF loss; SHF; VSOP; X-band; antenna noise temperature; dichroic design; dual-band communication; frequency allocations; frequency selective surface; ohmic loss; orbiting VLBI satellites; reflector antenna; Artificial satellites; Dual band; Frequency selective surfaces; Observatories; Radio astronomy; Radio spectrum management; Reflector antennas; Satellite broadcasting; Satellite ground stations; Signal design;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221813
