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Double-balanced mixer chip with high isolation and high linearity

A double-balanced mixer, high linearity technology, applied in the balance device of modulation conversion, electrical components, demodulation, etc., can solve the problems of unsatisfactory balun working characteristics, damage to the integrity of balun circuit, etc., and achieve optimal Linearity and RF-IF isolation, optimized overall performance, and improved practicability

Pending Publication Date: 2022-04-22
XIAN BORUI JIXIN ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the intermediate frequency signal is extracted from the RF balun end, the integrity of the balun circuit will be destroyed, and the working characteristics of the balun will become unsatisfactory as the frequency changes.

Method used

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  • Double-balanced mixer chip with high isolation and high linearity
  • Double-balanced mixer chip with high isolation and high linearity
  • Double-balanced mixer chip with high isolation and high linearity

Examples

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0022] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0023] Such as figure 1 As shown, it is a circuit topology diagram of a traditional double-balanced mixer. The circuit structure includes a radio frequency balun, a local oscillator balun, and a Schottky diode mixing core; where the local oscillator signal acts on the Schottky diode through the local oscillator balun Mixing core, the RF signal acts on the Schottky diode mixing core through the RF balun, and the intermediate frequency signal is extracted and output from the center tap of the RF balun; it is worth noting that this structure uses a traditional Schottky diode mixing ...

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Abstract

The invention discloses a double-balanced mixer chip with high isolation and high linearity. The double-balanced mixer chip comprises a local oscillator balun, a radio frequency balun, two local oscillator impedance matching networks, two radio frequency impedance matching networks, a Schottky diode mixing core and an intermediate frequency filter network, wherein the local oscillator Balun is connected with the Schottky diode frequency mixing core through the two local oscillator impedance matching networks, the radio frequency Balun is connected with the Schottky diode frequency mixing core through the two radio frequency impedance matching networks, and the radio frequency Balun is connected with the intermediate frequency filtering network. According to the invention, the linearity and RF-IF isolation of the mixer are optimized by changing the topological structures of the Schottky diode mixing core and the intermediate frequency filter network, and the topological structure of the circuit is changed, so that the overall performance of the mixer is optimized, and the practicability of the chip is improved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency integrated circuits, and relates to a double-balanced mixer chip with high isolation and high linearity. Background technique [0002] In the communication system, the mixer is one of the core devices in the microwave transceiver system, and its performance will directly affect the performance of the entire system. It is realized by the nonlinear characteristics of active / passive devices to generate input frequency The sum and difference frequency components of the input signal are shifted. [0003] In the field of electronic reconnaissance, with the continuous surge of high-power transmission and jamming equipment, large dynamic receivers have become important military equipment for the development of various military powers. The high linearity mixer is a key component of the large dynamic receiving front end, and its linearity index directly affects the dynamic range of the receiving sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/14
CPCH03D7/1408
Inventor 杜琳
Owner XIAN BORUI JIXIN ELECTRONICS TECH
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