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Ultra-wideband microwave receiver and signal segment processing method thereof

A technology of microwave receivers and processing methods, applied in electrical components, transmission systems, etc., can solve problems such as difficult filtering by filters, signal leakage, harmonic interference, and affecting the effective operation of receivers, so as to reduce bandwidth and reduce design difficulty , good practical effect

Active Publication Date: 2015-01-28
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

In the traditional scheme above, in order to effectively suppress the image frequency, the superheterodyne receiving method with double frequency conversion is often used. The first intermediate frequency signal frequency obtained after the first mixer processing is relatively high. If it is within the frequency range of the receiving signal of the machine, the signal leakage, harmonic interference, intermodulation interference, etc. generated by the signal mixing will easily fall into the effective bandwidth range of the first intermediate frequency signal, and it is difficult for subsequent filters to filter out, affecting effective operation of the receiver

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  • Ultra-wideband microwave receiver and signal segment processing method thereof
  • Ultra-wideband microwave receiver and signal segment processing method thereof

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Embodiment Construction

[0030] The present invention will be further elaborated below by describing a specific preferred embodiment in detail in conjunction with the accompanying drawings.

[0031] Such as figure 2 As shown, in the receiver according to the present invention, two signal channels are arranged after the switch filter bank, and the first limiting module, the first low noise amplifier, the first mixer, the band Pass filter (BPF), the second low-noise amplifier, and the first variable attenuator are then connected to the microwave switch; the second limiting module, the third low-noise amplifier, and the second variable attenuator are set in sequence in the other signal channel It is then connected to the same microwave switch as above; the microwave switch is a single-pole double-throw switch (SP2T) whose output is connected to the second mixer; There is a corresponding local oscillator signal.

[0032] The receiver's RF input signal It is 3GHz~12GHz, and the total signal bandwidth ...

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Abstract

The present invention provides an ultra-wideband microwave receiver and a signal segment processing method thereof. The method includes the steps of dividing an input signal of a receiver into a first low-band signal and a high-band signal; performing uplink mixing on the first low-band signal with a fixed local oscillation signal to obtain a second low-band signal; gating the second low-band signal with the high-band signal through a microwave switch to obtain an output signal and mixing the output signal with a wideband local oscillation signal to obtain a first intermediate frequency signal. The ultra-wideband microwave receiver and the signal segment processing method thereof effectively suppress harmonic interference signals and cross interference signals through signal segment processing for the multi-octave ultra-wideband receiver so as to improve the anti-interference performance of the receiver and reduce the design difficulty of wideband local oscillation and have good practicality and application prospects.

Description

technical field [0001] The patent of the invention belongs to the field of microwave receiver design, and in particular relates to an ultra-wideband microwave receiver and a signal segment processing method thereof. Background technique [0002] The microwave receiver mainly completes the pre-selection, filtering, limiting, amplification, frequency conversion and other processing of the signal to meet the requirements of subsequent further signal processing. [0003] With the continuous expansion of the signal frequency band, the signal processing range of the receiving system is required to be wider and wider, and gradually develop towards multi-octave broadband and ultra-wideband reception. However, due to the nonlinear effects of amplifiers, mixers and other devices, interference signals such as harmonics and intermodulation will be generated, especially when the receiver’s operating frequency band is multi-octave, the above interference signals become difficult to suppre...

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Application Information

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IPC IPC(8): H04B1/16H04B1/10
Inventor 李明亮蒋开创王晴李悬雷
Owner SHANGHAI RADIO EQUIP RES INST
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