RF front-end architecture for a separate non-50 ohm antenna system
First Claim
1. A front-end for use in a transceiver having a non-50 ohm antenna having a feed point for transmitting and receiving signals in a plurality of frequency ranges, said front-end comprising:
- a switching module having a plurality of switching elements, each switching element having a first end and an opposing second end, the first end operatively connected to the feed point of the antenna, the second end operatively connected to a signal path for conveying the signals in one of the frequency ranges;
a plurality of matching networks for separately matching the signal paths to the antenna; and
a further matching network operatively connected to the feed point of the antenna, located between the switching module and the antenna.
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Abstract
A transceiver system having an RF front-end operatively connected to two separate non-50 ohm antennas for separately providing transmission/reception paths for 1 GHz band and for 2 GHz band. A switching module is operatively connected to each antenna for mode and frequency-range selection within each band. Each switching module has a plurality of switching elements connected to a plurality of signal paths. Matching is separately and independently provided for each signal path. The matching can be achieved by using distributed elements or lumped elements arranged in shunt or series in order to widen the bandwidth. An electrostatic discharge protection circuit is provided between the antenna feed point and the switching module. The protective circuit can also be used as a discrete matching network that can be optimized depending on the phone mechanics and dimensions.
52 Citations
23 Claims
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1. A front-end for use in a transceiver having a non-50 ohm antenna having a feed point for transmitting and receiving signals in a plurality of frequency ranges, said front-end comprising:
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a switching module having a plurality of switching elements, each switching element having a first end and an opposing second end, the first end operatively connected to the feed point of the antenna, the second end operatively connected to a signal path for conveying the signals in one of the frequency ranges;
a plurality of matching networks for separately matching the signal paths to the antenna; and
a further matching network operatively connected to the feed point of the antenna, located between the switching module and the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A multi-band, multi-mode transceiver system, comprising:
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a first non-50 ohm antenna for transmitting and receiving signals in a plurality of frequency ranges in a first frequency band, the first antenna having a feed point;
a second non-50 ohm antenna for transmitting and receiving signals in a plurality of further frequency ranges in a second frequency band, the second antenna having a feed point; and
at least a front-end module and a second module, each front-end module comprising;
a switching module having a plurality of switching elements, each switching element having a first end and an opposing second end, the first end operatively connected to the feed point of the respective antenna, the second end operatively connected to a signal path for conveying the signals of one of the frequency ranges in the respective frequency band;
a plurality of matching networks for separately matching the signal paths to the respective antenna; and
a further matching network operatively connected to the feed point of the respective antenna, located between the switching module and the respective antenna. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification