Title :
S/X/Ka-band dichroic mirrors for deep-space antennas
Author :
Besso, P. ; Bozzi, M. ; Formaggi, M. ; Germani, S. ; Perregrini, L.
Author_Institution :
Eur. Space Agency, Darmstadt, Germany
Abstract :
The paper presents two solutions for the design of a 45°-incidence S/X/Ka-band dichroic mirror for a European Space Agency ground station supporting deep space missions. The dichroic mirror is required to reflect completely in S band (2.025-2.3 GHz) and X band (7.145-8.5 GHz) and to be transparent in Ka band (31.8-34.7 GHz). The first mirror, consisting of a thick metal screen perforated periodically with rounded rectangular holes, has been fabricated and measured. A second design, based on a metal screen with hexagonal holes, has also been investigated, and it has been proved that this solution provides better overall antenna performance.
Keywords :
UHF devices; antenna accessories; microwave devices; millimetre wave devices; mirrors; space communication links; 2.025 to 2.3 GHz; 31.8 to 34.7 GHz; 7.145 to 8.5 GHz; European Space Agency ground station; deep-space antennas; dichroic mirrors; hexagonal holes; rounded rectangular holes; Downlink; Feeds; Frequency; Manufacturing; Milling; Mirrors; Optical reflection; Polarization; Space missions; Space stations;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552669
