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Ultra-wideband radio frequency front-end receiving circuit

A technology of radio frequency front-end and receiving circuit, which is applied in the field of ultra-wideband radio frequency front-end receiving circuit, and can solve problems such as difficult to achieve ultra-wideband and difficult to achieve full-band coverage of ultra-wideband

Active Publication Date: 2019-10-18
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The RF front-end receiving circuit structure often works in narrowband, and it is difficult to achieve ultra-wideband. Even if an ultra-wideband LNA is used for reception, it is difficult to achieve full-band coverage of 0.5GHz-16GHz ultra-wideband, and communication receivers used for communication and detection are usually used separately

Method used

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  • Ultra-wideband radio frequency front-end receiving circuit
  • Ultra-wideband radio frequency front-end receiving circuit
  • Ultra-wideband radio frequency front-end receiving circuit

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0060] See figure 1 , figure 1 It is a structural block diagram of an ultra-wideband radio frequency front-end receiving circuit provided by an embodiment of the present invention. As shown in the figure, an ultra-wideband radio frequency front-end receiving circuit of this embodiment includes an IQ phase-shifting circuit module 1 and a first radio frequency path module 2. The second radio frequency path module 3 and the path selection module 4, wherein, the IQ phase shifting circuit module 1 inputs the local oscillator differential signal LO, and the output ends are respectively connected to the first radio frequency path module 1 and the second radio frequency path module 2, the first radio frequency The channel module 2 inputs the first radio frequency signal RFIN_H, the second radio frequency channel module 2 inputs the second radio frequency signal RFIN_L, the output terminals of the first radio frequency channel module 1 and the second radio frequency channel module 2 ar...

Embodiment 2

[0065] This embodiment is a further description of the UWB RF front-end receiving circuit in Embodiment 1, please refer to figure 2 and image 3 , figure 2 It is a schematic structural diagram of an IQ phase-shifting circuit module provided by an embodiment of the present invention; image 3 It is a schematic structural diagram of an ultra-wideband radio frequency front-end receiving circuit provided by an embodiment of the present invention. As shown in the figure, the IQ phase shifting circuit module 1 includes a clock recovery unit 101, a first buffer Buffer1, a second buffer Buffer2, a first four-phase phase shifting unit 102 and a second four-phase phase shifting unit 103, wherein the clock The recovery unit 101 inputs the local oscillator differential signal LO for amplifying the local oscillator differential signal LO, and the output terminals are respectively connected to the first buffer Buffer1 and the second buffer Buffer2; the first buffer Buffer1 is connected ...

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Abstract

The invention relates to an ultra-wideband radio frequency front-end receiving circuit. The circuit comprises an IQ phase shift circuit module, a first radio frequency path module, a second radio frequency path module and a path selection module. Wherein the first radio frequency path module receives a radio frequency signal of 8GHz-16GHz, and mixes the radio frequency signal with 7GHz-15GHz I-path and Q-path local oscillation differential signals generated by the IQ phase shift circuit module to obtain two paths of mixing differential signals; the second radio frequency path module receives aradio frequency signal of 0.5 GHz to 8 GHz and mixes the radio frequency signal with an I-path local oscillation differential signal and a Q-path local oscillation differential signal of 0 GHz to 7 GHz generated by the IQ phase shift circuit module to obtain two paths of mixing differential signals; and the path selection module selects to output two paths of mixing differential signals generatedby mixing of the first radio frequency path module or two paths of mixing differential signals generated by mixing of the second radio frequency path module according to the path selection signal. The ultra-wideband radio frequency front-end receiving circuit is provided with two paths of radio frequency paths for receiving signals, can cover the full frequency band of 0.5 GHz to 16GHz, and realizes the receiving of ultra-wideband radio frequency signals.

Description

technical field [0001] The invention belongs to the technical field of radio frequency transceiver circuits, and in particular relates to an ultra-wideband radio frequency front-end receiving circuit. Background technique [0002] With the development of wireless communication technology, the requirements for the RF front-end circuit are getting higher and higher, and the RF front-end receiving circuit is the key module of the receiver. FCC (Federal Communications Commission, US Federal Communications Commission) defines a signal with a signal bandwidth greater than 500MHz or a signal with a ratio of the signal bandwidth to the center frequency greater than 25% as an ultra-wideband signal, and a signal with a ratio of the signal bandwidth to the center frequency of 1% to 25%. It is defined as a broadband signal, and a signal whose ratio of the signal bandwidth to the center frequency is less than 1% is defined as a narrowband signal. [0003] The traditional RF front-end re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16
CPCH04B1/16
Inventor 刘马良罗朋朱樟明杨银堂
Owner XIDIAN UNIV