Mimo and diversity front-end arrangements for multiband multimode communication engines
First Claim
1. A receive front-end module for use in a multi-band, multi-mode communication device, the communication device having a plurality of electrically separated antennas, said receive front-end module comprising:
- at least two feed points adapted to connect separately to at least two of said plurality of antennas for receiving communication signals in the communication device;
a plurality of signal paths, operatively connected to the feed points for simultaneously receiving communication signals in a plurality of frequency bands, wherein each signal path has a filter for filtering the communication signals in the corresponding frequency band; and
at least one isolation component, disposed in the signal paths, for providing cross-band isolation between at least two of the signal paths, wherein at least two of said plurality of signals paths are adapted to simultaneously receive communication signals in a plurality of frequency bands from one of the antennas through one of the two feed points, and at least a different one of the said plurality of signal paths is adapted to receive communication signals from another one of the antennas through the other of the two feed points in a further frequency band different from the said plurality of frequency bands.
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Accused Products
Abstract
A receive front-end module having one or more 2 GHz Rx paths and one or more W-CDMA Rx paths for use in a portable communication device, such as a mobile phone or a communicator device. The module comprises at least two feed points operatively connected to two electrically separate antennas for receiving communication signals. The module also comprises filters for filtering the communication signals in corresponding frequency band, and means for providing cross-band isolation. The cross-band isolation is achieved by using linear amplifiers in different signal paths, for example. Advantageously, the module comprising three signal paths so that one or more modules can be used together to achieve MIMO/diversity functionality.
61 Citations
36 Claims
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1. A receive front-end module for use in a multi-band, multi-mode communication device, the communication device having a plurality of electrically separated antennas, said receive front-end module comprising:
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at least two feed points adapted to connect separately to at least two of said plurality of antennas for receiving communication signals in the communication device; a plurality of signal paths, operatively connected to the feed points for simultaneously receiving communication signals in a plurality of frequency bands, wherein each signal path has a filter for filtering the communication signals in the corresponding frequency band; and at least one isolation component, disposed in the signal paths, for providing cross-band isolation between at least two of the signal paths, wherein at least two of said plurality of signals paths are adapted to simultaneously receive communication signals in a plurality of frequency bands from one of the antennas through one of the two feed points, and at least a different one of the said plurality of signal paths is adapted to receive communication signals from another one of the antennas through the other of the two feed points in a further frequency band different from the said plurality of frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of enhancing reception of communication signals in a multi-band, multi-mode communication device, the communication device having a plurality of electrically separated antennas, and a plurality of signal paths for receiving communication signals in a plurality of frequency bands, said method comprising:
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providing at least a first feed point and a second feed point, the first and second feed points adapted to connect separately to at least two of said plurality of antennas; operatively connecting at least two of said plurality of signal paths to the first feed point for receiving communication signals through the first feed point, and at least a different one of said plurality of signal paths to the second feed point for receiving communication signals through the second feed point, each of the signal paths connected to the first and second feed points has a filter for filtering the communication signals in the corresponding frequency band; and providing cross-band isolation between at least two of said plurality of signal paths, wherein the communication signals received in at least one of the signal paths connected to the first feed point and the communication signals received in at least one of the signal paths connected to the second feed point are transmitted in the same frequency band and transmission mode, and wherein the two signal paths connected to the first feed points are adapted to receive communication signals in different frequency bands.
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34. A multi-band, multi-mode communication device, comprising:
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a plurality of electrically separated RF antennas, including a first antenna and a second antenna, and a front-end module comprising; at least a first feed point and a second feed point separately connected to the first and second antennas, and a plurality of signal paths operatively connected to the first and second feed points for receiving communication signals in a plurality of frequency bands, each signal path having a filter for filtering the communication signals in the corresponding frequency band, wherein the communication signals received in at least one of the signal paths connected to the first feed point and the communication signals received in at least one of the signal paths connected to the second feed point are transmitted in the same frequency band and transmission mode, and the communication signals received in another different one of the signal paths connected to the first feed point are transmitted in a different frequency band. - View Dependent Claims (35, 36)
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Specification