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Harmonic mixer with low local oscillator power

A harmonic mixer, low local oscillator technology, applied in the field of communication, can solve the problems of insufficient local oscillator power, frequency conversion loss and noise figure index deterioration, and achieve the performance of frequency conversion loss and noise figure, low conversion loss and noise. Coefficient performance, the effect of resolving production difficulty and cost

Active Publication Date: 2015-11-18
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the operating frequency of the mixer increases to the high end of the millimeter wave frequency and the terahertz frequency band, the frequency conversion loss and noise figure index of this type of mixer deteriorate rapidly due to insufficient local oscillator power

Method used

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  • Harmonic mixer with low local oscillator power
  • Harmonic mixer with low local oscillator power
  • Harmonic mixer with low local oscillator power

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Embodiment 1

[0039] image 3 It is a structural diagram of a low local oscillator power harmonic mixer of the present invention, as shown in the figure, including a mixing diode DC bias circuit and a low loss local oscillator intermediate frequency duplexer; wherein, the diode is connected to the circuit on both sides of the pad Completely symmetrical, the specific structure includes: a diode pair (2) composed of two diode junctions, two low-loss film capacitors (6) in a symmetrical structure, two decoupling capacitors (3) in a symmetrical structure, and two plate capacitors (4) and a DC decoupling filter circuit composed of two high-capacity broadband capacitors (5) and a DC resistance bias network (11); one of the capacitors (6), (3), (4), and (5) use gold wire interconnection;

[0040] The diode pair (2) is located in the mouth of the radio frequency input waveguide (1), and the radio frequency signal can be directly coupled to the diode pair, thereby reducing the radio frequency power...

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Abstract

The invention provides a harmonic mixer with low local oscillator power in an embodiment. The harmonic mixer comprises a mixer diode DC bias circuit and a low-loss local oscillator intermediate-frequency duplexer, wherein the mixer diode DC bias circuit comprises a diode pair (2) composed of two diode junctions, two structurally symmetrical low-loss thin-film capacitors (6), a DC decoupling filter circuit composed of two decoupling capacitors (3), two plate capacitors (4) and two high-capacitance broadband capacitors (5) of a symmetrical structure, and a DC resistance bias network (11); the low-loss local oscillator intermediate-frequency duplexer comprises a local oscillator matching filter (10), a local oscillator input waveguide (8) to a suspended stripline waveguide probe transition circuit (9) and an intermediate-frequency low-pass filter (7), all of which are orderly connected with each other. The harmonic mixer with low local oscillator power is capable of realizing low variable-frequency loss and noise coefficient properties under the condition of low local oscillator power; as a result, the problems of technical indices of the existing solutions and the manufacturing difficult and the cost of a local oscillator frequency doubling chain are solved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a harmonic mixer with low local oscillator power. Background technique [0002] As an important part of systems such as microwave and millimeter wave radar, guidance, communication and test instruments, mixers have always been an important research topic in the field of millimeter wave and terahertz. With the continuous improvement of the requirements of various systems on the working bandwidth, the receiving sensitivity of the receiving system, and the detection distance and other indicators, higher requirements are also put forward for the frequency conversion loss and noise figure of the mixer. The mixers working at the low-end frequencies of microwave, millimeter wave and terahertz mainly include active mixers based on MMIC technology and Schottky barrier diode mixers based on hybrid integrated circuit technology. [0003] The active MMIC mixer working in the millimete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/16
Inventor 代秀朱伟峰韦柳泰徐从玉
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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