{"title":"Synthesis of Oversized Smooth-Walled Horns via Phase Rematching Method","authors":"Xiaoyi Liao;Minxing Wang;Shuai Huang;Chen Zhao;Zewei Wu","doi":"10.1109/TAP.2024.3437634","DOIUrl":null,"url":null,"abstract":"Smooth-walled horns realize efficient radiation by introducing high-order modes meeting the requirements for both proportion and phase. However, the excitation of high-order modes depends on the relative phase of hybrid modes, and the modulation of the relative phase is limited by the frequency dispersion. The dependence between the excitation and phase modulation poses considerable challenges in synthesizing smooth-walled horns. This article reveals the hybrid modes conversion mechanism in smooth-walled horn and proposes a phase-rematching method to synthesize oversized smooth-walled horns for high power millimeter-wave applications. In this method, the excitation and phase modulation are independently realized: utilizing a slow taper near the input to modulate the relative phase and compensate for the frequency dispersion and employing a nonmonotonically increasing radius to control the amplitudes of hybrid modes. To verify the proposed method, a W-band highly oversized smooth-walled horn is designed, fabricated, and measured for gyrotron traveling-wave tubes.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Antennas and Propagation","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10632052/","RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Smooth-walled horns realize efficient radiation by introducing high-order modes meeting the requirements for both proportion and phase. However, the excitation of high-order modes depends on the relative phase of hybrid modes, and the modulation of the relative phase is limited by the frequency dispersion. The dependence between the excitation and phase modulation poses considerable challenges in synthesizing smooth-walled horns. This article reveals the hybrid modes conversion mechanism in smooth-walled horn and proposes a phase-rematching method to synthesize oversized smooth-walled horns for high power millimeter-wave applications. In this method, the excitation and phase modulation are independently realized: utilizing a slow taper near the input to modulate the relative phase and compensate for the frequency dispersion and employing a nonmonotonically increasing radius to control the amplitudes of hybrid modes. To verify the proposed method, a W-band highly oversized smooth-walled horn is designed, fabricated, and measured for gyrotron traveling-wave tubes.
光滑壁喇叭通过引入同时满足比例和相位要求的高阶模式来实现高效辐射。然而,高阶模式的激励取决于混合模式的相对相位,而相对相位的调制则受到频率色散的限制。激励和相位调制之间的依赖关系给合成光滑壁喇叭带来了巨大挑战。本文揭示了光滑壁喇叭中的混合模式转换机制,并提出了一种相位匹配方法,以合成超大光滑壁喇叭,用于高功率毫米波应用。在该方法中,激励和相位调制是独立实现的:利用输入附近的慢锥度来调制相对相位并补偿频率色散,同时采用非单调递增的半径来控制混合模式的振幅。为了验证所提出的方法,我们设计、制造并测量了用于陀螺仪行波管的 W 波段高超大光滑壁喇叭。
期刊介绍:
IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques