微波光子濾波器和移相器研究
發(fā)布時間：2019-04-21 16:26
【摘要】：微波光子學主要研究光信號與微波信號的相互作用,研究的范圍包括工作在微波頻段的光學器件以及微波儀器在光學系統(tǒng)中的應用。與傳統(tǒng)的微波信號處理技術(shù)相比,微波光子學具有廣闊的應用前景,這主要是因為這一信號處理技術(shù)具有工作帶寬大,損耗小,抗電磁干擾能力強等優(yōu)點。本研究主要對微波光子濾波器和微波光子移相器兩個方向進行相關(guān)的探究,由以下幾個部分組成:(1)具有平坦群延時的高精度微波光子陷波濾波器的設計。首先,通過理論分析找出了影響微波光子濾波器群延時的原因:濾波器的沖擊響應分布是否對稱。然后,仿真和實驗驗證了這一結(jié)論。最后,實驗實現(xiàn)了一個陷波微波光子濾波器,濾波器在通帶內(nèi)的幅值抖動很小,陷波深度為40d Bm,群延時抖動不大于±25ps。(2)大帶寬微波光子移相器設計。提出了一種基于雙平行馬赫曾德爾調(diào)制器和可調(diào)諧檢偏器的大帶寬微波光子移相器設計方案,在保證強度輸出不變的情況下實現(xiàn)360°全范圍移相,同時移相器的低頻工作帶寬得到了顯著的提升,可以運用于2~26.5GHz和4~40GHz的電子對抗系統(tǒng)中。(3)大帶寬微波光子移相器的抖動抑制。通過分析找出了導致移相器幅值和相位抖動的原因:電橋的幅值和相位不平衡。并提出了相應的決解方案:加入光濾波器濾除由于電橋幅值和相位不平衡引起的高頻殘余邊帶。最后實驗實現(xiàn)了移相器在4~40GHz頻率范圍內(nèi)從-180°~+180°移相的過程中,相位波動從±12°下降到了±3.8°。
[Abstract]:Microwave photonics mainly studies the interaction between optical signals and microwave signals, including optical devices operating in microwave frequency band and the application of microwave instruments in optical systems. Compared with the traditional microwave signal processing technology, microwave photonics has a broad application prospect, which is mainly because the signal processing technology has the advantages of large bandwidth, low loss and strong ability to resist electromagnetic interference. In this paper, the microwave photon filters and microwave photon phase shifters are discussed, which are composed of the following parts: (1) the design of high precision microwave photon notch filters with flat group delay. Firstly, the reason that affects the delay of microwave photonic filter group is found out by theoretical analysis: whether the impulse response distribution of the filter is symmetric or not. Then, simulation and experiment verify this conclusion. Finally, a notch microwave photonic filter is implemented. The amplitude jitter of the filter in the pass band is very small, and the notch depth of 40 d Bm, group delay jitter is not greater than the design of the multiband microwave photon phase shifter with a range of 25 PS. (2). A design scheme of microwave photon phase shifter with large bandwidth based on double parallel Mach Zehnder modulator and tunable polarizer is presented in this paper, which can realize 360 擄full range phase shifter under the same intensity output. At the same time, the low frequency bandwidth of the phase shifter has been greatly improved, which can be used in the electronic countermeasure system of 2~26.5GHz and 4~40GHz. (3) the jitter suppression of the microwave photon phase shifter with large bandwidth. The reasons for the amplitude and phase jitter of the phase shifter are analyzed: the imbalance between the amplitude and the phase of the bridge. The corresponding decision scheme is put forward: the optical filter is added to filter the high frequency residual sideband caused by the unbalanced amplitude and phase of the bridge. Finally, the phase shift of the phase shifter from-180 擄to 180 擄in the frequency range of 4~40GHz is realized, and the phase fluctuation decreases from 鹵12 擄to 鹵3.8 擄.
【學位授予單位】：暨南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN713;TN623
[Abstract]:Microwave photonics mainly studies the interaction between optical signals and microwave signals, including optical devices operating in microwave frequency band and the application of microwave instruments in optical systems. Compared with the traditional microwave signal processing technology, microwave photonics has a broad application prospect, which is mainly because the signal processing technology has the advantages of large bandwidth, low loss and strong ability to resist electromagnetic interference. In this paper, the microwave photon filters and microwave photon phase shifters are discussed, which are composed of the following parts: (1) the design of high precision microwave photon notch filters with flat group delay. Firstly, the reason that affects the delay of microwave photonic filter group is found out by theoretical analysis: whether the impulse response distribution of the filter is symmetric or not. Then, simulation and experiment verify this conclusion. Finally, a notch microwave photonic filter is implemented. The amplitude jitter of the filter in the pass band is very small, and the notch depth of 40 d Bm, group delay jitter is not greater than the design of the multiband microwave photon phase shifter with a range of 25 PS. (2). A design scheme of microwave photon phase shifter with large bandwidth based on double parallel Mach Zehnder modulator and tunable polarizer is presented in this paper, which can realize 360 擄full range phase shifter under the same intensity output. At the same time, the low frequency bandwidth of the phase shifter has been greatly improved, which can be used in the electronic countermeasure system of 2~26.5GHz and 4~40GHz. (3) the jitter suppression of the microwave photon phase shifter with large bandwidth. The reasons for the amplitude and phase jitter of the phase shifter are analyzed: the imbalance between the amplitude and the phase of the bridge. The corresponding decision scheme is put forward: the optical filter is added to filter the high frequency residual sideband caused by the unbalanced amplitude and phase of the bridge. Finally, the phase shift of the phase shifter from-180 擄to 180 擄in the frequency range of 4~40GHz is realized, and the phase fluctuation decreases from 鹵12 擄to 鹵3.8 擄.
【學位授予單位】：暨南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN713;TN623
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