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horn antenna 喇叭形天線。

horn fly

The works of this paper are mainly about the study for ultra wide - band ( uwb ) signal radiating - designing for effective uwb antenna , and uwb signal scattering - investigating of composite scattering for targets upon ground . firstly , the radiating characters of uwb signal and development of uwb antenna are discussed an uwb planar horn antenna is designed this antenna is characterized with u - balun , simple construction and perfect performance 本文的研究是“九五”國防預研“超寬帶( uwb )雷達體制及關鍵技術研究”項目工作的一部分,主要包括兩方面內容:超寬帶信號的輻射-高效超寬帶天線的研制;超寬帶信號的散射-地表目標的復合散射研究。

Four tem - horn antennas have been made . using these antennas two - element rain gutter tem - horn array , two - element stacked tem - horn array , four - element rain gutter tem - horn array and four - element stacked tem - horn array are been mades up of . the results of experiment accord with theory and numerical stimulation 最后,對tem喇叭天線陣列進行了原理性實驗研究,設計了帶地板結構的半tem喇叭天線,組成二元槽狀陣列、二元疊狀陣列、四元槽狀陣列、四元疊狀陣列等,應用小信號測試,得到的結果與理論和數值模擬相一致。

In this paper , the signal processing of sum and difference patterns of amplitude dual - plane monopulse radar and the effect of amplitude - plane non - consistency are analyzed from the coordinates relationship of four - horn antenna at length , and its corresponding simulation is verified , which bring convenience to engineering implementation 文中從四喇叭天線的位置坐標關系,詳細分析了雙平面振幅和差式單脈沖雷達信號處理過程以及三通道幅相不一致性的影響,并且進行了相應的仿真,為工程實現帶來了很大的便利。

It has the good qualities of both tem horn antenna and dipole antenna , less dimensions construction , good direction and higher efficiency . its impedance and radiation are analyzed . good agreements are obtained from experiment and calculation 這種平面喇叭天線采用了新型的平衡饋電方式,結構簡單,性能良好,同時結合了tem喇叭和振子天線的優點,結構維數低,具有較強的方向性、較高的效率,在uwbsar軌道系統實驗中取得了比較理想的結果。

Secondly , in this paper , the four typical uwb antennas of tem horn antenna , log - periodic antenna , biconical antenna and helical antenna are theoretically analyzed and the uwb antenna design methods are generalized and discussed 其次,本文對tem喇叭天線、對數周期天線、雙錐形天線和螺旋天線四種典型的超寬帶天線進行了理論分析,總結并討論超寬帶天線的設計方法和手段。

Then , using the opening transmission line model , the deduction of the tem - horn antenna far - field radiation formula is introduced . comparing with the traditional nb antenna array , the brief theory of uwb antenna is analyzed 然后介紹了應用開路傳輸線理論模型對tem喇叭天線軸上遠場輻射的推導過程,并對比傳統窄帶天線陣列,分析了超寬帶天線陣列的一般工作原理。

On the assumption that a cabin and a horn antenna were under the bottom of an airplane , fdtd method was applied to analyze the antenna patterns which are generally affected by the body of the airplane 摘要假定飛機腹部加裝了某一形狀的炮艙和矩形喇叭天線,用時域有限差分法( fdtd )分析了這樣的外形對天線輻射特性的影響。

Just as nb antenna array the pattern of uwb tem - horn antenna array is concern with the number and distance of elements at which the pattern lie in 陣列某一面方向圖僅與這一面的單元個數及單元間距有關與其它面的陣列單元個數和單元間距無關。