Patent ID: 7212782
Filing Date: 2007-05-01
Classification: H01Q,H04B,H04H

Abstract:
1. A low-noise block down-converter receiving M (M≧2) types of polarization signals from each of N (N≧2) satellites, comprising: N frequency converting circuits each corresponding to one satellite and converting frequency bands of M types of polarization signals received from the corresponding satellite into M intermediate frequency bands that do not overlap one another; N first signal couplers each corresponding to one satellite and performing frequency-multiplexing of said M types of polarization signals from the corresponding satellite having their frequency bands converted, to generate a first combined signal; and a signal rearranging circuit selecting any M first combined signals from N of said first combined signals allowing duplicate selection, taking out any one polarization signal from each of the selected first combined signals, and performing frequency-multiplexing of the taken out M polarization signals to generate at least one second combined signal.