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CNI系統(tǒng)L波段接收機射頻前端綜合化設計方案探討
2022年電子技術應用第10期
張宇暉
中國西南電子技術研究所,四川 成都610036
摘要: 針對通信導航識別系統(tǒng)(Communiction,Navigation and Identification,CNI)中L波段多功能射頻綜合化的需求,對L波段接收機射頻前端電路進行綜合化設計。通過分析CNI中航管、塔康、精密測距等L波段功能對接收機的性能需求,結合接收機主要工作原理和技術指標選取二次變頻超外差接收機結構作為實現(xiàn)方案,并對接收機射頻前端下變頻電路和中頻電路進行設計,通過復用前級下變頻電路,在中頻放大電路中分功能處理實現(xiàn)射頻前端綜合化設計。計算了兩種放大模式下各級器件的增益、噪聲系數(shù)等指標,結論表明各項指標滿足功能設計需求,該射頻前端綜合化設計方案可以滿足CNI系統(tǒng)L波段接收機射頻綜合化需求。
中圖分類號: TN492
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.223018
中文引用格式: 張宇暉. CNI系統(tǒng)L波段接收機射頻前端綜合化設計方案探討[J].電子技術應用,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
Zhang Yuhui
Southwest China Institute of Electronic Technology,Chengdu 610036,China
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

0 引言

    通信導航識別系統(tǒng)(Communiction,Navigation and Identification,CNI)是一種采用綜合化設計方案的多功能航電設備,主要完成載機與地面的話音及數(shù)據(jù)通信、無線電導航、精密測距、航管及監(jiān)視識別等功能[1]。由于CNI集成功能較多,如果為每個功能單獨設計射頻信道,系統(tǒng)硬件設計勢必會過度冗余,超額的重量、功耗是載機無法接受的。因此,為了滿足CNI系統(tǒng)高集成度需求,在設計射頻信道時需要從頂層設計出發(fā),以相近頻段的功能需求為基礎,根據(jù)各功能信號的工作頻段、信號帶寬、接收靈敏度、動態(tài)范圍等特征進行綜合化設計,實現(xiàn)射頻信道多功能通用化,優(yōu)化系統(tǒng)硬件架構,減少系統(tǒng)重量和功耗。同時,綜合化設計后射頻信道可在系統(tǒng)動態(tài)配置下支持多功能重構,提高功能任務可靠性和系統(tǒng)戰(zhàn)訓能力[2]。本文以航管、塔康、精密測距3個功能為例,對CNI中L波段接收機射頻前端綜合化設計進行研究和討論。




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作者信息:

張宇暉

(中國西南電子技術研究所,四川 成都610036)





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