Radio frequency front end module with high band selectivity
First Claim
1. A wireless networking device for transmitting and receiving radio frequency signals, the device comprising:
- an antenna configured to transmit an output radio frequency signal and to receive an input radio frequency signal;
a front end module, the front end module including an integrated circuit to transmit the output radio frequency signal to the antenna and to receive the input radio frequency signal from the antenna under a time-division multiplexing framework, the integrated circuit amplifying the output radio frequency signal and the input radio frequency signal, said front end module configured to adjust characteristics of a band pass filter to process signals from a different frequency band;
wherein the integrated circuit includes;
a transmit-receive switch having a transmit port, a receive port and an antenna port, the transmit-receive switch during operation alternates between coupling the antenna port to the transmit port and coupling the antenna port to the receive port;
a power amplifier configured to amplify the output radio frequency signal, when the antenna port is coupled to the transmit port;
a low noise amplifier configured to amplify the input radio frequency signal when the antenna port is coupled to the receive port; and
two external filter leads coupling the band pass filter outside the integrated circuit between the low noise amplifier and the receive port of the transmit-receive switch; and
a radio signal component configured to modulate a carrier wave to construct the output radio frequency signal, and to demodulate the input radio frequency signal to extract an information-bearing signal.
1 Assignment
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Accused Products
Abstract
A radio frequency front end module is provided for a high power capability and a high signal band selectivity. The front end module includes an external filter and an integrated circuit coupled with the external filter via two external filter leads. The integrated circuit includes a transmit-receive switch, a power amplifier and a low noise amplifier. The transmit-receive switch alternates between coupling an antenna port to a transmit port and coupling the antenna port to a receive port. The power amplifier amplifies a modulated radio frequency signal. The low noise amplifier amplifies a received radio frequency signal when the antenna port is coupled to the receive port. The external filter can be replaced to adapt to various requirements of signal frequency bands, without the need of modifying the layout of the integrated circuit.
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Citations
20 Claims
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1. A wireless networking device for transmitting and receiving radio frequency signals, the device comprising:
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an antenna configured to transmit an output radio frequency signal and to receive an input radio frequency signal; a front end module, the front end module including an integrated circuit to transmit the output radio frequency signal to the antenna and to receive the input radio frequency signal from the antenna under a time-division multiplexing framework, the integrated circuit amplifying the output radio frequency signal and the input radio frequency signal, said front end module configured to adjust characteristics of a band pass filter to process signals from a different frequency band; wherein the integrated circuit includes; a transmit-receive switch having a transmit port, a receive port and an antenna port, the transmit-receive switch during operation alternates between coupling the antenna port to the transmit port and coupling the antenna port to the receive port; a power amplifier configured to amplify the output radio frequency signal, when the antenna port is coupled to the transmit port; a low noise amplifier configured to amplify the input radio frequency signal when the antenna port is coupled to the receive port; and two external filter leads coupling the band pass filter outside the integrated circuit between the low noise amplifier and the receive port of the transmit-receive switch; and a radio signal component configured to modulate a carrier wave to construct the output radio frequency signal, and to demodulate the input radio frequency signal to extract an information-bearing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for transmitting and receiving radio frequency signals, the method comprising:
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receiving an input frequency signal at an antenna; transmitting, via an integrated circuit, an output radio frequency signal to the antenna and receiving an input radio frequency signal from the antenna under a time-divisional multiplexing framework, the integrated circuit amplifying the output radio frequency signal and the input radio frequency signal, a front end module adjusting characteristics of a band pass filter to process signals from a different frequency band; wherein the integrated circuit further comprises; alternating operation of a transmit-receive switch having a transmit port, a receive port, and an antenna port between coupling the antenna port to the transmit port and coupling the antenna port to the receive port; amplifying the output radio frequency signal with a power amplifier when the antenna port is coupled to the transmit port; amplify the input radio frequency signal with a low noise amplifier configured when the antenna port is coupled to the receive port; and coupling, via two external filter leads, the band pass filter outside the integrated circuit between the low noise amplifier and the receive port of the transmit-receive switch; and modulating a carrier wave to construct the output radio frequency signal, and to demodulate the input radio frequency signal to extract an information-bearing signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification