中图分类号： TN492
文献标识码： A
DOI：10.16157/j.issn.0258-7998.223018
中文引用格式： 张宇晖. CNI系统L波段接收机射频前端综合化设计方案探讨[J].电子技术应用，2022，48(10)：1-4，8.
英文引用格式： Zhang Yuhui. Discussion on integrated design scheme of RF front-end for CNI L-band receiver[J]. Application of Electronic Technique，2022，48(10)：1-4，8.

Discussion on integrated design scheme of RF front-end for CNI L-band receiver

Abstract： In this paper, according to the needs of L-band multi-function RF integration of CNI, the integrated design of the L-band receiver RF front-end circuit is carried out.By analyzing the performance requirements of L-band functions such as ATC,TACAN and DMEP on the receiver, combined with the main working principle and technical indicators of the receiver, the structure of the dual-conversion superheterodyne receiver is selected as the implementation scheme.The RF front-end down-conversion circuit and IF circuit of the receiver are designed, and the integrated design of the RF front-end is realized by multiplexing the down-conversion circuit and dividing the functions in the IF circuit.The gain, noise figure and other indicators of the devices at all levels under the two amplification modes are calculated. The conclusion shows that the indicators meet the design requirements of the functions,and the RF front-end integrated design scheme in this paper can meet the RF integration requirements of the CNI system L-band receiver.

Key words : CNI；L-band receiver；RF front-end；integrated design