無方向性天線 的英文怎麼說

中文拼音 [fāngxiàngxìngtiānxiàn]
無方向性天線 英文
isotropic antenna
  • : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
  • : Ⅰ名詞1 (方形; 方體) square 2 [數學] (乘方) involution; power 3 (方向) direction 4 (方面) ...
  • : Ⅰ名詞1 (性格) nature; character; disposition 2 (性能; 性質) property; quality 3 (性別) sex ...
  • : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
  • 方向 : direction; orientation
  1. On the base of above it, this paper discuss the synthesis of optimum distributed arrays by nonuniform spacing in the sense of dolph - chebyshev. having derived the equations of optimum element distribution, we analyze the exponentially spaced array, which are optimum when the elements are isotropic and equally weighted, and the array by general raised cosine function. the formulate for estimating the sidelobe envelope, beamwidth of the array pattern and clean region width are obtained

    推導了最佳陣元分佈程,分別對陣元和等加權時的最佳分散式陣列? ?指數間隔陣列和採用廣義升餘弦加權的最佳分散式陣列進行了分析,推導了圖旁瓣包絡、波束寬度,干凈掃描區寬度的估計公式,給出了近軸旁瓣電平與陣列參數的關系。
  2. This kind of reflectors possessed the advantages of the traditional reflectors and the phased arrays. the reflectarray is made up of lots of resonant elements. when the feed radiate the reflectarray, the reflected wave could be focused at some desired direction owing to the adjustment of each element

    這種陣列反射具有反射和陣列共同的優勢,它的基本結構就是由大量的源諧振單元組成的單屏或多屏周期陣列,然後由一個饋源照射這個,通過調節介質板上每個單元對于入射波的散射相位,使得反射波在特定的實現同相位,發射出極強的筆形波束。
  3. For power control of listening users, forward power control method are introduced based on full, multichannel, filtered report, and collision method etc. the full report method has redundancy report information, and its real - time performance is bad, multichannel report is introduced to improve the real - time performance, and filtered report is introduced to eliminate the redundancy information, finally the collision method introduced can not only get higher real - time performance but also diminish the redundancy information ; 2. in order to meet the requirements of making the dynamic simulation of trunking group system, the ms ’ s random move equation is brought forward, the simulation of ms ’ s distribution is done and the integrated channel model are presented ; 3. the smart predicative model of power control is introduced to overcome the delay and track the change of the complicated network, with this model, the power control ‘ s performance is greatly improved

    全匯報法存在冗餘的匯報信息,而且實時較差,為了改善實時提出了多通道的匯報式,為了改善冗餘匯報而提出了篩選法,最後介紹的碰撞法在減少冗餘信息的同時又提高了實時;二、為了集群功率控制動態模擬的需要,提出了移動臺的隨機運動程,進行了有關移動臺的分佈模擬,建立了綜合的通道模型;三、希望克服延時和跟蹤復雜網路環境變化,提出了功率控制的智能預測模型,通過智能預測模型可以改善功率控制的能,著重介紹了採用神經網路的法實現智能預測的通用模型,從而跟蹤復雜多變的環境,諸如慢衰落及快衰落(包括多徑衰落、多普勒效應所引起的衰落)等網路特徵,達到預測功率需求;四、採用二級正交碼和智能(空分多址)的法進行組內用戶的識別,改進功率控制效果;五、話權用戶的前和反功率控制法;六、對引入gota的cdma系統提出了復合容量表示法,並作容量分析,探討有關gota系統的qos問題。
  4. Among the effective methods to mitigate the fading in wireless communications is transmit diversity, which can utilize the space diversity of transmit antennae to generate the receive diversity and improve the performance of the forward link

    發送分集技術是對抗通道衰落的重要手段,它能將發送的空間分集轉化為接收機可以利用的分集式,以改善前鏈路的能。
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