Adaptive antenna optimization network
First Claim
1. A wireless communications device for transmitting signals in a first plurality of transmit frequency bands and for receiving signals in a second plurality of receive frequency bands, the wireless communications device comprising:
- an antenna for transmitting signals to and receiving signals from a wireless communications network; and
an adjustable matching network selectively connecting the antenna to a select one of a third plurality of transmit power amplifiers corresponding to the first plurality of transmit frequency bands for signal transmission, the adjustable matching network matching an impedance of the antenna to the select one transmit power amplifier.
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Accused Products
Abstract
An adjustable matching network is provided for a wireless communications device transmitting and receiving signals in multiple frequency bands via an antenna. The adjustable matching network selectively connecting the antenna to a select power amplifier corresponding to a selected transmit frequency band and automatically matching the impedance of the antenna to the select power amplifier. The adjustable matching network also selectively connecting the antenna to a select bandpass filter corresponding to a selected receive frequency band and automatically matching the impedance of the antenna to the select bandpass filter.
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Citations
40 Claims
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1. A wireless communications device for transmitting signals in a first plurality of transmit frequency bands and for receiving signals in a second plurality of receive frequency bands, the wireless communications device comprising:
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an antenna for transmitting signals to and receiving signals from a wireless communications network; and
an adjustable matching network selectively connecting the antenna to a select one of a third plurality of transmit power amplifiers corresponding to the first plurality of transmit frequency bands for signal transmission, the adjustable matching network matching an impedance of the antenna to the select one transmit power amplifier. - 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, 33, 35, 36, 37, 38, 39, 40)
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34. A wireless communication device for transmitting and receiving signals in multiple transmit and receive frequency bands using Time Division Multiple Access (TDMA) signal formats, the wireless communications device comprising:
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an antenna for transmitting signals to and receiving signals from a wireless communications network;
a transmit/receive switch selectively coupling the antenna to a transmit signal path during a transmit time slot of a frame period of the TDMA signal format, and selectively coupling the antenna to a receive signal path during a receive time slot of the TDMA frame period;
a variable matching network connected in the transmit signal path between the antenna and a selected transmit power amplifier corresponding to a selected transmit frequency band;
an impedance mismatch measuring and quantizing unit connected in the transmit signal path between the selected transmit power amplifier and the variable matching network, the impedance mismatch measuring and quantizing unit measuring forward and reflected power of a signal transmitted on the selected transmit frequency band, and generating mismatch indication signals providing a quantized indication of antenna impedance mismatch, the impedance mismatch measuring and quantizing unit generating the mismatch indication signals during the transmit time slot of the TDMA frame period; and
a control processing unit receiving and processing the mismatch indication signals and providing adjustment control signals to the variable matching network during a portion of the TDMA frame period not utilized by the wireless communications device for transmission.
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Specification