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基于光纖波分復(fù)用的時(shí)頻信號(hào)分發(fā)傳輸技術(shù)
2022年電子技術(shù)應(yīng)用第8期
陳 凌
中國西南電子技術(shù)研究所,，四川 成都610036
摘要： 在數(shù)字相控陣中為保證多通道之間信號(hào)合成效率,，需要系統(tǒng)為相控陣的多個(gè)子陣提供高穩(wěn)定的時(shí)頻信號(hào),。傳統(tǒng)相控陣采用電纜直接分發(fā)傳輸?shù)姆椒ù嬖诜嘁恢滦圆畹膯栴},。提出了一種基于光纖波分復(fù)用的時(shí)頻信號(hào)分發(fā)傳輸技術(shù),，可有效解決數(shù)字相控陣中時(shí)頻信號(hào)高效穩(wěn)定分發(fā)傳輸問題,，分發(fā)傳輸后的各支路信號(hào)幅度隨溫度變化在±0.5 dBm之內(nèi),，相位隨溫度變化在±3°之內(nèi),。該時(shí)頻信號(hào)分發(fā)傳輸技術(shù)已經(jīng)成功應(yīng)用于某數(shù)字相控陣多目標(biāo)統(tǒng)一測(cè)控系統(tǒng)。
中圖分類號(hào)： TN914
文獻(xiàn)標(biāo)識(shí)碼： A
DOI：10.16157/j.issn.0258-7998.222989
中文引用格式： 陳凌. 基于光纖波分復(fù)用的時(shí)頻信號(hào)分發(fā)傳輸技術(shù)[J].電子技術(shù)應(yīng)用,，2022,，48(8)：90-94，100.
英文引用格式： Chen Ling. Time-frequency signal distribution and transmission technology based on optical fiber WDM[J]. Application of Electronic Technique,，2022,，48(8)：90-94，100.
Time-frequency signal distribution and transmission technology based on optical fiber WDM
Chen Ling
Southwest China Institute of Electronic Technology，Chengdu 610036,，China
Abstract： In order to ensure the efficiency of signal synthesis between multiple channels in a digital phased array, the system needs to provide highly stable time-frequency signals for multiple sub-arrays of the phased array. There is a problem of poor amplitude and phase consistency in the method that the traditional phased array uses cables to directly distribute and transmit. In this paper, a time-frequency signal distribution and transmission technology based on optical fiber wavelength division multiplexing is proposed, which can effectively solve the problem of efficient and stable distribution and transmission of time-frequency signals in digital phased arrays. The amplitude of each branch signal after distribution and transmission varies with temperature within ±0.5 dBm, and the phase varies with temperature within ±3°. The time-frequency signal distribution and transmission technology has been successfully applied to a digital phased array multi-target unified measurement and control system.
Key words : digital phased array,；WDM；optical distribution-transmission for time-frequency signal

0 引言

    數(shù)字相控陣廣泛應(yīng)用在通信,、射電天文,、雷達(dá)、聲納,、航天測(cè)控領(lǐng)域,。多個(gè)天線子陣和多通道組成數(shù)字相控陣系統(tǒng)的射頻前端部分，每個(gè)通道接收的信號(hào)經(jīng)AD轉(zhuǎn)換后在數(shù)字域進(jìn)行信號(hào)合成,，形成波束,。信號(hào)合成時(shí)需要在同一時(shí)刻進(jìn)行多通道信號(hào)幅相加權(quán)，從而獲得高質(zhì)量的合成信號(hào),，實(shí)現(xiàn)信號(hào)在天線遠(yuǎn)端波束形成精確指向功能[1-4],。為實(shí)現(xiàn)這個(gè)目標(biāo)，系統(tǒng)必須為多通道提供統(tǒng)一的工作時(shí)鐘,，同時(shí)由于多通道信號(hào)之間的幅度相位存在不一致性[5-9],，系統(tǒng)必須進(jìn)行多通道的幅相精確標(biāo)校。其中時(shí)頻及標(biāo)校信號(hào)的傳輸質(zhì)量直接影響信號(hào)合成效率,。另外,，系統(tǒng)還需要將本振信號(hào)分發(fā)傳輸?shù)较嗫仃囎雨囃瓿墒瞻l(fā)信號(hào)變頻功能。

    傳統(tǒng)電纜分發(fā)傳輸設(shè)計(jì)時(shí)把時(shí)頻信號(hào),、標(biāo)校信號(hào)和本振信號(hào)分別用不同的傳輸網(wǎng)絡(luò)進(jìn)行傳輸：傳輸時(shí)頻信號(hào)時(shí)需要大量功分器和傳輸電纜,，根據(jù)通道數(shù)不同，功分器和傳輸電纜數(shù)量不同,，其設(shè)備數(shù)量多且復(fù)雜,，線纜數(shù)量多重量大，天線子陣空間狹小不便于安裝,，多通道時(shí)頻信號(hào)相位一致性較差,；傳輸標(biāo)校信號(hào)和本振信號(hào)時(shí)根據(jù)通道數(shù)需要大量選擇開關(guān)，與傳輸時(shí)頻信號(hào)一樣,，其設(shè)備組成復(fù)雜,，難安裝，難維護(hù),，多通道標(biāo)校信號(hào)相位一致性較差,。為了獲得更大的天線增益和傳輸距離，數(shù)字相控陣系統(tǒng)信號(hào)通道規(guī)模越來越大,，會(huì)達(dá)到成千上萬個(gè),，且數(shù)字相控陣系統(tǒng)集成度也越來越高,，迫切需要設(shè)計(jì)高效穩(wěn)定的時(shí)頻、標(biāo)校和本振信號(hào)分發(fā)傳輸網(wǎng)絡(luò),。




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作者信息：

陳  凌

(中國西南電子技術(shù)研究所，四川 成都610036)




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