Single matching inductor for receivers to operate frequency bands in a multi-band radio frequency device
A multi-band radio frequency device uses a single matching inductor to provide matching impedance for multiple receivers, each operating over a different frequency band. The single matching inductor replaces individual matching inductors for each frequency band.
1 . A front end module comprising:
a plurality of duplexers, each duplexer configured to receive radio frequency signals within a specific frequency band of a plurality of frequency bands; and
a single impedance matching inductor configured to provide impedance matching for a plurality of receive signal paths between receive nodes of the plurality of duplexers and at least one low noise amplifier;
an antenna switching module in communication with at least one antenna and having a plurality of first switch positions, the antenna switching module configured to provide communication, responsive to a first control signal, between the at least one antenna and a selected duplexer of the plurality of duplexers; and
a single tuning inductor configured to provide tuning for the antenna switching module for each of the plurality of first switch positions.
2 . The front end module of claim 1 further comprising the at least one antenna configured to receive radio frequency signals within the plurality of frequency bands.
3 . The front end module of claim 1 further comprising a first low noise amplifier switch in communication with a first end of the single impedance matching inductor and having a plurality of second switch positions, the first low noise amplifier switch configured to provide communication, responsive to a second control signal, between the single impedance matching inductor and a selected duplexer of the plurality of duplexers.
4 . The front end module of claim 3 wherein the at least one low noise amplifier is a shared low noise amplifier that is configured to amplify the receive radio frequency signals in each frequency band of the plurality of frequency bands.
5 . The front end module of claim 4 wherein the shared low noise amplifier is configured to receive the receive radio frequency signal at a second end of the single impedance matching inductor.
6 . The front end module of claim 3 wherein the at least one low noise amplifier includes a plurality of low noise amplifiers, each low noise amplifier of the plurality of low noise amplifiers configured to amplify the receive radio frequency signal from a specific frequency band of the plurality of frequency bands.
7 . The front end module of claim 6 further comprising a second low noise amplifier switch in communication with a second end of the single impedance matching inductor, the second low noise amplifier switch being configured to be in communication with a selected low noise amplifier of the plurality of low noise amplifiers.
8 . The front end module of claim 7 wherein the selected low noise amplifier is in communication with the second end of the single impedance matching inductor via the second low noise amplifier switch.
9 . The front end module of claim 8 wherein the selected low noise amplifier is associated with the selected duplexer.
10 . The front end module of claim 1 wherein the single impedance matching inductor is a surface mount inductor.
11 . The front end module of claim 1 further comprising at least one receiver configured to process the receive radio frequency signals, wherein the at least one receiver includes a filter that can be adjusted to provide additional impedance matching functionality.
12 . A multi-band radio frequency device comprising:
at least one antenna configured to receive and transmit radio frequency signals within a plurality of frequency bands;
a plurality of duplexers, each duplexer configured to receive radio frequency signals within a specific frequency band of the plurality of frequency bands; and
a single impedance matching inductor configured to provide impedance matching for a plurality of receive signal paths between receive nodes of the plurality of duplexers and at least one low noise amplifier;
an antenna switching module in communication with the at least one antenna and having a plurality of first switch positions, the antenna switching module configured to provide communication, responsive to a first control signal, between the at least one antenna and a selected duplexer of the plurality of duplexers; and
a single tuning inductor configured to provide tuning for the antenna switching module for each of the plurality of first switch positions.
13 . The multi-band radio frequency device of claim 12 wherein the at least one antenna includes a plurality of antennas, each antenna configured to receive and transmit radio frequency signals for a different frequency band of the plurality of frequency bands.
14 . The multi-band radio frequency device of claim 12 further comprising a first low noise amplifier switch in communication with a first end of the single impedance matching inductor and having a plurality of second switch positions, the first low noise amplifier switch configured to provide communication, responsive to a second control signal, between the single impedance matching inductor and a selected duplexer of the plurality of duplexers.
15 . The multi-band radio frequency device of claim 12 wherein the single impedance matching inductor is a surface mount inductor.
16 . The multi-band radio frequency device of claim 12 further comprising at least one receiver configured to process the receive radio frequency signals, wherein the at least one receiver includes a filter that can be adjusted to provide additional impedance matching functionality.
17 . The multi-band radio frequency device of claim 12 wherein the at least one low noise amplifier is a shared amplifier that is configured to amplify the receive radio frequency signals in each frequency band of the plurality of frequency bands.
18 . The multi-band radio frequency device of claim 12 wherein the at least one low noise amplifier includes a plurality of low noise amplifiers, each low noise amplifier of the plurality of low noise amplifiers is configured to amplify the receive radio frequency signal from a specific frequency band of the plurality of frequency bands.
19 . The front end module of claim 1 wherein the single tuning inductor is a surface mount device.
20 . The multi-band radio frequency device of claim 12 wherein the single tuning inductor is a surface mount device.