槽式天線 的英文怎麼說
中文拼音 [cáoshìtiānxiàn]
槽式天線
英文
notch antenna-
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經營銷售：進口、國產天然膠、丁苯膠、順丁膠、丁腈膠、三元乙丙膠、丁基膠、氯璜化聚乙烯、輪胎類精細、無味、丁基、丁腈、彩色、乳膠類等多種型號天然橡膠、合成橡膠和再生橡膠；硫化促進劑、防老劑、炭黑、石蠟、硬脂酸、氧化鋅、氧化鎂、鈦白粉、古馬龍、工業硫磺粉等各種橡膠化工原輔材料；各種規格epdm彩色顆粒，天橋防滑橡膠地磚、塑膠場地、人造草坪鋪裝、各種規格防滑橡膠安全地磚、橡膠盲道磚、植草磚、樹木圍護磚、屋頂隔熱板、道路橡膠減速塊，專用綠色環保型橡膠輪胎膠粒、膠粉及成品，各類橡膠、塑料膠管、膠帶、膠板，可撓曲橡膠軟接頭，橡膠止水帶，橋梁伸縮裝置，天然膠板式橡膠支座，遇水膨脹橡膠，橡膠、塑料導風筒， pe pp pvc水管、電管、阻燃線槽，地板線槽、 mc尼龍產品、橡塑機械及配件調劑，並承接各種普通、特種橡塑、尼龍產品加工製造。Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results
文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合The antenna design is based on using capacitive loads and slits on two crossed narrow patches with via fed - through feed system, which can reduce the size of the antenna, improve the isolation between two ports and keep considerable bandwidth respectively
通過電容性加載減小整個天線的尺寸，通過在天線上開槽來增加天線埠之間的隔離度，採用viafed - through的饋電方式。This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes
本文採用edge - basedfem為基本方法，結合物理光學法（ po ） 、物理繞射理論（ ptd ） 、邊界積分方程（ bi ） 、區域分解技術（ ddm ）和完全匹配層（ pml ）吸收邊界條件等求解方法構成的混合方法，對電磁散射和輻射問題進行了研究，主要包括以下內容：提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法，並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。The satss is an antenna pointing servo system with ultra - low speed and high accuracy, driven by a rare earth permanent magnet ( repm ) brushless dc torque motor. to reduce torque ripple, the repm brushless dc torque motor has a slotless armature, and uses sinusoidal wave driven technology
衛星天線跟蹤伺服系統為超低速高精度天線指向控制系統，該系統使用稀土永磁式無刷直流力矩電機作為天線的驅動機構，為降低轉矩脈動，電機採用無槽電樞結構設計，並使用正弦波驅動方式。Loading different shapes of slots in the patches of antennas will cut off the original surface current and the current has to flow around the slots that make its route longer. this course is equally satisfactory in result of inserting cascade inductances in the equivalent circuit of antenna
當在貼片表面開不同形式的槽或細縫時，切斷了原來的表面電流路徑，使電流繞槽邊曲折流過而路徑變長，在天線等效電路中相當于引入了級聯電感。分享友人