Short wave broadband receiver

A wide-band receiver and short-wave technology, applied in the field of electronic information, can solve the problems of low dynamic range, reduced sensitivity, and harsh requirements, and achieve the effects of no local oscillator phase noise, high scanning speed, and high MTBF

Inactive Publication Date: 2012-07-11
CHENGDU ZHONGYA TONGMAO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] 3) Even harmonic distortion reduces sensitivity
[0013] 4) Low radiation has stricter requirements on LO leakage indicators
[0014] 5) In general, the dynamic range is lower than the other two structures
If the DC cancellation technique is not applied, this scheme can only be used in modulation schemes without DC components; be...

Method used

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Embodiment Construction

[0035] The invention provides a shortwave wideband receiver.

[0036] see figure 1 Shown: The short-wave broadband receiver is mainly composed of an analog output circuit and a digital output circuit connected to the analog output circuit. The analog output circuit is mainly composed of a limiter circuit 1, an input low-pass filter 2, and a mode selection component circuit connected in sequence , a band-pass filter component 5, an attenuation circuit, an output low-pass filter 8, and an output low-noise amplifier 9, and the output low-noise amplifier 9 is connected to the digital output circuit.

[0037] The digital output circuit adopts an existing digital output circuit, so details will not be repeated here.

[0038] The mode selection component circuit includes a channel switching switch connected to the input low-pass filter 2, and three parallel channels connected to the channel switching switch. The three parallel channels are respectively a low-noise amplifier channel,...

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PUM

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Abstract

The invention provides a short wave broadband receiver, which mainly comprises an analog output circuit and a digital output circuit connected with the analog output circuit, wherein the analog output circuit mainly comprises an amplitude limiting circuit, an input low pass filter, a mode selection assembly circuit, a band-pass filter assembly, an attenuator circuit, an output low pass filter and an output low noise amplifier which are connected sequentially; and the output low noise amplifier is connected with the digital output circuit. The short wave broadband receiver has beneficial effects of high scanning speed, no mirror image or intermediate frequency and no local oscillator phase noise, very suitability for broadband application, no interference signals generated by a local oscillator or frequency mixer, high linearity and low power consumption, less core parts and higher MTBF (Mean Time Between Failures).

Description

technical field [0001] The invention belongs to the technical field of electronic information, and specifically refers to a short-wave broadband receiver. It is mainly used in radio monitoring and broadband receivers in the communication industry. Background technique [0002] The zero-IF receiver is similar to the direct conversion receiver, and its main feature is that it has a phase-locked module to eliminate the local oscillator deviation, so it is more suitable for burst high-speed communication. The main factors affecting its performance are the isolation, dynamic range and noise figure of the quadrature mixer, the amplitude and phase imbalance of the I / Q path, and the deviation of the transceiver frequency and clock. [0003] Zero-IF receivers are highly integrated, do not require IF filters and frequency converters, and often use direct conversion solutions with low cost. However, designing zero-IF receivers in the VHF band will become very complicated and difficult...

Claims

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Application Information

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IPC IPC(8): H04B1/16H04B1/10
Inventor 郝温利张成
Owner CHENGDU ZHONGYA TONGMAO TECH
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