Adaptive antenna tuner for a transceiver
First Claim
Patent Images
1. An antenna tuning system operable to provide matching simultaneously at a first transmission frequency and a first receive frequency, the antenna tuning system comprising:
- a first antenna tuner configured to provide a first pass band having a first resonant frequency and a second resonant frequency, the first antenna tuner comprising;
a first low-pass pi network, the first low-pass pi network comprising;
a first shunt connected segment configured to provide a first variable capacitance;
a second shunt connected segment configured to provide a second variable capacitance;
a first series connected segment coupled between the first shunt connected segment and the second shunt connected segment and configured to provide a first inductance;
a first capacitive element configured to provide a third variable capacitance wherein the first capacitive element is coupled in series with the first low-pass pi network; and
an antenna tuner control system operably associated with the first antenna tuner, the antenna tuner control system being operable to control the first variable capacitance, the second variable capacitance, and the third variable capacitance so as to degrade the first pass band of the antenna tuner between the first resonant frequency and the second resonant frequency to provide higher O-factors at the first resonant frequency and the second resonant frequency.
4 Assignments
0 Petitions
Accused Products
Abstract
An antenna tuner provides a pass band with a transmission resonant frequency and a receive resonant frequency. In this manner, the pass band of the antenna tuner can simultaneously provide matching at both a transmission frequency and a receive frequency, when both transmission signals and receive signals are received on the same antenna. The antenna tuner includes a first capacitive element that is coupled to series resonate with the antenna and a low-pass pi network.
-
Citations
25 Claims
-
1. An antenna tuning system operable to provide matching simultaneously at a first transmission frequency and a first receive frequency, the antenna tuning system comprising:
a first antenna tuner configured to provide a first pass band having a first resonant frequency and a second resonant frequency, the first antenna tuner comprising; a first low-pass pi network, the first low-pass pi network comprising; a first shunt connected segment configured to provide a first variable capacitance; a second shunt connected segment configured to provide a second variable capacitance; a first series connected segment coupled between the first shunt connected segment and the second shunt connected segment and configured to provide a first inductance; a first capacitive element configured to provide a third variable capacitance wherein the first capacitive element is coupled in series with the first low-pass pi network; and an antenna tuner control system operably associated with the first antenna tuner, the antenna tuner control system being operable to control the first variable capacitance, the second variable capacitance, and the third variable capacitance so as to degrade the first pass band of the antenna tuner between the first resonant frequency and the second resonant frequency to provide higher O-factors at the first resonant frequency and the second resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
7. The antenna tuning system of claim above 6, wherein:
-
the first transmission frequency defines a first physical uplink channel; the first receive frequency defines a first physical downlink channel, wherein the first physical uplink channel and the first physical downlink channel are associated with a first transport channel; the second transmission carrier frequency is associated with a second physical uplink channel; and the second receive carrier frequency is associated with a second physical downlink channel, wherein the second physical uplink channel and the second physical downlink channel are associated with a second transport channel.
-
-
19. A transceiver, comprising:
-
a transmitter circuit operable to up convert a first transmission signal into a first physical uplink channel; a receiver circuit operable to down convert a first receive signal out of a first physical downlink channel; an antenna tuner operably associated with the transmitter circuit and the receiver circuit, wherein the antenna tuner is configured to provide a first pass band having a first resonant frequency and a second resonant frequency, the antenna tuner comprising; a first low-pass pi network, the first low-pass pi network comprising; a first shunt connected segment configured to provide a first variable capacitance; a second shunt connected segment configured to provide a second variable capacitance; a first series connected segment coupled between the first shunt connected segment and the second shunt connected segment and configured to provide a first inductance; a first capacitive element configured to provide a third variable capacitance wherein the first capacitive element is coupled in series with the first low-pass pi network; and an antenna tuner control system operably associated with the antenna tuner to control the first variable capacitance, the second variable capacitance, and the third variable capacitance such that the first physical uplink channel is within a 3 dB bandwidth of the first resonant frequency and the first physical downlink channel is within a 3 dB bandwidth of the second resonant frequency and so as to degrade the first pass band of the antenna tuner between the first resonant frequency and the second resonant frequency to provide higher Q-factors at the first resonant frequency and the second resonant frequency. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
Specification