Radio frequency receiving channel circuit for implementing satellite navigation anti-interference antenna

A radio frequency receiving and channel circuit technology, applied in satellite radio beacon positioning system, radio wave measurement system, electrical components and other directions, can solve the problems of complex circuit, cumbersome debugging, no anti-burning function, etc., to achieve large dynamic range, The effect of reducing circuit complexity and power consumption

Pending Publication Date: 2017-09-15
TIANJIN 764 COMM AIRMANSHIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The original RF receiving channel circuit has a small dynamic range of receiving signals, p

Method used

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  • Radio frequency receiving channel circuit for implementing satellite navigation anti-interference antenna
  • Radio frequency receiving channel circuit for implementing satellite navigation anti-interference antenna
  • Radio frequency receiving channel circuit for implementing satellite navigation anti-interference antenna

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[0011] The present invention will be further described below in conjunction with the drawings.

[0012] Reference figure 1 , The radio frequency receiving channel circuit includes a pre-filtering and limiting circuit, a low-noise amplifier circuit, a down-conversion circuit, an automatic gain control circuit, and an intermediate frequency filter circuit. The pre-filtering and limiting circuit is connected to the low-noise amplifier circuit, and the low-noise amplifier circuit is connected to the The down-conversion circuit is connected, and the down-conversion circuit is connected with the automatic gain control circuit and the intermediate frequency filter circuit.

[0013] Reference figure 2 , The pre-filter limiting circuit and low-noise amplifier circuit of the present invention adopt CPD1268M20B filter U1, SMP1330-005 limiter U2, MGA-633P8 amplifier U3, and SF2186E SAW filter U4. The specific connection is: filter U1 Pin 1 is used as the signal input, pin 2 of filter U1 is co...

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Abstract

The invention discloses a radio frequency receiving channel circuit for realizing satellite navigation anti-jamming antenna. The radio frequency receiving channel circuit includes a pre-filter limiting circuit, a low-noise amplifier circuit, a down-conversion circuit, an automatic gain control circuit and an intermediate frequency filter circuit. This design is selective to signals, suppresses out-of-band interference signals and spurious signals, has anti-burnout function (30dBm), has a large dynamic range, and does not produce distortion when the signal amplitude changes, and the signal output is controlled at 0dB The noise figure is guaranteed to be within 1.2, which minimizes the deterioration of the signal-to-noise ratio during signal transmission in the channel, and ensures that the signal can work normally when passing through non-linear devices such as low-noise amplifiers, mixers, and automatic gain controls. An automatic gain control circuit is composed of a chip and related peripheral matching resistors and capacitors, which simplifies the automatic gain control circuit and reduces circuit complexity and power consumption.

Description

technical field [0001] The invention relates to a satellite navigation anti-jamming antenna, in particular to a radio frequency receiving channel circuit for realizing the satellite navigation anti-jamming antenna. Background technique [0002] The radio frequency receiving channel is a necessary circuit for processing satellite high-frequency signals in the satellite navigation anti-jamming antenna. It not only needs very low noise and good sensitivity, but also has a certain dynamic range to ensure its anti-jamming performance. The original RF receiving channel circuit has a small dynamic range of receiving signals, poor signal selectivity, no anti-burnout function, complex circuits, and cumbersome debugging. Contents of the invention [0003] In view of the deficiencies in the prior art, the invention provides a radio frequency receiving channel circuit with a simple circuit for realizing the satellite navigation anti-jamming antenna. The circuit can receive weak satel...

Claims

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Application Information

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IPC IPC(8): G01S19/21G01S19/35H04B1/16H04B1/10H03D7/16
CPCH03D7/16H04B1/10H04B1/16G01S19/21G01S19/35
Inventor 张智拓王长林刘晴晴倪大森项勇跃吴洋董乃菊
Owner TIANJIN 764 COMM AIRMANSHIP
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