Signal coupling methods and arrangements
First Claim
1. A signal coupling arrangement including two signal paths, a cross-coupling path between the two signal paths for the transfer of a compensating signal, the cross-coupling path providing means for transferring a compensating signal from one of the two signal paths to the other to compensate for an unwanted signal which has been transferred between the two signal paths.
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Accused Products
Abstract
Signal coupling arrangements are described in which the effect of unwanted signals transferred between two antennas is compensated for. In one arrangement a microstrip edge coupler is used as a compensation network to provide a cross-coupling path for the transfer of a compensating signal between two antenna signal paths. In another arrangement, an antenna assembly includes cross-slots which, in association with a conductive ring, provide two mutually orthogonally polarized radiation signals and connections to the conductive ring have closely spaced portions which provide compensation for and minimize the effect of unwanted mutual coupling.
248 Citations
13 Claims
- 1. A signal coupling arrangement including two signal paths, a cross-coupling path between the two signal paths for the transfer of a compensating signal, the cross-coupling path providing means for transferring a compensating signal from one of the two signal paths to the other to compensate for an unwanted signal which has been transferred between the two signal paths.
- 8. A signal coupling arrangement including antennas which operate at two mutually orthogonal polarisations, two input ports, feed means from the ports to two spaced points on a conductive ring, a conductive sheet having a pair of cross slots therein in a plane spaced from that of the conductive ring and centralized with respect to it, for providing two radiation paths at crossed polarisations substantially perpendicular to the plane of the ring, the spaced points on the ring, the ring, and the slots being so arranged that a higher degree of isolation between two radiation signals of orthogonal polarisation may be obtained than the degree of isolation provided by virtue of the orthogonal polarisation of the radiation signals alone.
Specification