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Broadband radio frequency sampling mixer

A mixer and radio frequency technology, applied in the field of radio frequency, can solve the problems of complex structure, high cost and low reliability, and achieve the effect of small size, low cost and good phase noise.

Inactive Publication Date: 2017-08-11
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional broadband samplers are generally implemented in hybrid integrated circuits, which require the use of microstrip circuits and bare chips, which have the disadvantages of complex structure, high cost, and low reliability, and are not conducive to integration with other parts of the circuit.

Method used

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0022] Such as figure 1 As shown, the pulse generator generates an extremely narrow switching pulse signal containing rich harmonics, and outputs it to the microstrip-slot conversion balun, and the microstrip-slot conversion balun divides the switching pulse signal into Two pulse signals of 180°, and load the two pulse signals on both ends of the Schottky sampling diode pair through the sampling capacitor and the sampling resistor. The pulse is equivalent to controlling the switch of the Schottky sampling diode pair, as long as the pulse amplitude is greater than the Schottky sampling diode The conduction voltage of the Terkyn sampling diode can turn on the sampling gate circuit, the Schottky sampling diode is conducting, and the input RF signal is sampled. The sampled signal is first held by the sampling capacitor, and then the intermediate fre...

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Abstract

The invention discloses broadband radio frequency sampling mixer, and belongs to the technical field of radio frequency. The mixer comprises a pulse generator, a microstrip line-trough line conversion Balun and a sampling gate diode circuit. The pulse generator in the mixer provided by the invention makes an input 50MHz local oscillator signal generate abundant harmonic components needed by sampling, harmonic frequency covers 2MHz-6GHz, the generated pulse signal is high in signal amplitude and good in phase noise, meanwhile the pulse signal can be prevented from returning back to the input end of an local oscillator, and isolation degrees of the local oscillator, radio frequency and intermediate frequency are improved; the microstrip line / trough line Balun adopts a microstrip line and trough line conversion structure, as the 1 / 4 wave length trough line forming circuit is used, the microstrip line / trough line Balun has an extremely small insertion loss and standing-wave coefficient, reflection of the microwave pulse signal is reduced, and transmission of the microwave pulse signal is more facilitated; an intermediate frequency signal generated by sampling and mixing is high in signal amplitude and good in signal purity; the whole circuit can be integrated onto a printed circuit board, so that the volume is small and the cost is low.

Description

technical field [0001] The invention belongs to the field of radio frequency technology, and in particular relates to a broadband radio frequency sampling mixer. Background technique [0002] The broadband sampling mixer converts the microwave signal into a lower frequency intermediate frequency signal, while keeping the amplitude information and phase information of the microwave signal from being lost. Therefore, it has been widely used in frequency conversion systems with low local vibration. Broadband sampling technology is a very important technology in various systems such as vector network analyzers, ultra-wideband communication receivers, sampling oscilloscopes, microwave counters, and phase-locked loop devices. [0003] The existing broadband sampling mixer adopts the method of microwave hybrid integration. In the cavity, the bare chips and thin film resistors are connected together through the microstrip sheet, gold wire and gold mesh to form a broadband sampling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/14H03K3/021
CPCH03D7/1408H03K3/021
Inventor 姚廷明许延峰段喜东孙国泉殷军杨彪张治海
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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