Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (3): 1-5.doi: 10.16180/j.cnki.issn1007-7820.2020.03.001

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Design and Implementation of a Passive High Linear Mixing Component

YAN Yang,SHI Yu   

  1. School ofSchool Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China
  • Received:2019-02-10 Online:2020-03-15 Published:2020-03-25
  • Supported by:
    National Natural Science Fund of China(61471086)


In the RF communication system, the mixer acts as the core device of the receiver, and its linearity directly affects the performance of the entire receiving system. A passive high linear mixing component circuit with the method of the “balanced mixer + absorption filter” to achieve high linearity requirements was designed and implemented in this paper. The balanced mixer was interconnected by a pair of double balanced mixers and the linearity was optimized with the phase cancellation. The nonlinear harmonics generated by the mixers were absorbed by the filter, which blocked the reflection in the space. The two parts worked together to optimize the linearity of the entire component. After actual testing, the IIP2 of the mixing component could reach 94 dBm and the IIP3 could reach 29 dBm with the RF frequency of 30~1 350 MHz, the local oscillator frequency of 3 030~4 350 MHz, and the intermediate frequency of 3 000 MHz. Compared to a single mixer, its linear performance was greatly optimized and was more suitable for high performance receivers.

Key words: radio frequency, passive, high linear, mixing component, balanced mixer, absorption filter

CLC Number: 

  • TN702