| 摘要: |
| 采用双平衡场效应管结构和阻抗匹配技术设计了一种适用于短波宽带接收机的高线性
混频器，通过调整场效应管的沟道宽度和偏置电压优化了混频器的性能指标。该混频器射频
输入频率为15～30 MHz，本振输入频率为715～100 MHz，中频输出频率为70
MHz。测试结果表明：输入三阶截点高于40 dBm，变频损耗小于7 dB，1 dB
压缩点高于12 dBm，单边带噪声系数小于7 dB。 |
| 关键词: 短波通信 宽带接收机 高线性混频器 双平衡场效应管 阻抗匹配 |
| DOI： |
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| 基金项目: |
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| Design of a short-wave broadband mixer with high linearity |
| ZHU Hai-tao,ZHANG Hong,XU Tang-hong,WANG Dong,LAN Min |
| () |
| Abstract: |
| The structure of double-balance field effect transistor and resistance-match t
echnology are used to design a high linearity mixer for
the short-wave broadband receiver. The channel-width and bias-vol
tage of the field effect transistor are adjusted to optimize the mixer′s perfor
mance.The RF frequency is 1.5～30MHz,the LO frequency is 71.5～100 MHz and the IF frequency is 70 MHz. The test results show that the IIP3 is ab
ove 40 dBm, the conversion loss is lower than 7 dB, IP-1 dB is abo
ve 12 dBm and SSB noise figure is lower than 7 dB. |
| Key words: short-wave communication broadband receiver high linearity mixer double-balance
field effect transistor resistance match |
