Transponder systems are disclosed for routing signals from a plurality of input frequency channels at each of a plurality of receive antennas to a plurality of output frequency channels at each of a plurality of transmit antennas. The routing is preferably processed at an intermediate frequency. A plurality of bandpass filters are coupled to each receive antenna to define input signal paths. First and second mixers are positioned in series with each bandpass filter. A mixing signal at the first mixer adjusts the frequency of a selected one of the input signals to pass it through the bandpass filter and onto the respective input signal path. A mixing signal on the second mixer translates the frequency of that input signal to have a frequency order in the intermediate frequency band that corresponds with the frequency order of a selected one of the output frequency channels at its respective transmit antenna. Each of the transmit antennas is coupled to a common signal path of an adder. The adder has a plurality of intermediate signal paths which are each connected through a plurality of switches to a selected one of the input signal paths.
申请公布号
US5924031(A)
申请公布日期
1999.07.13
申请号
US19970781370
申请日期
1997.01.21
申请人
HUGHES ELECTRONICS CORPORATION
发明人
COPELAND, WILBERT B.;BALLHAUS, WILLIAM L.;BRUNNER, ROBERT A.;BERMAN, ARNOLD L.;MILLIKEN, SAMUEL A.