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- antenna beam width 天線射束寬度
- With the help of statistic principle, the estimtion ormulas ofthe antenna gain loss, beam width and siedlobe level in sparse array are derived. 應用概率統計原理，導出了具有幅相誤差、元失效時稀疏陣天線陣增益損失、束寬度、向、瓣電平的估計公式、得出一些有益結論。
- The paper studies three key problem of base station array antenna for mobile communication, controlled radiation pattern, beam width and passive intermodulation. 本文研究移動通信基站天線中的三個關鍵問題，波束賦形、波瓣寬度、無源交調。
- By applying "slit method",the beam width of THz wave was measured. 利用「狹縫法"測量了太赫茲光束的束寬。
- The estimation results based on these equations show that the rain echo power may deviate from its normal value by a factor of -3 to +6 db depending on the radar height, antenna elevation, wave length, beam width, surface reflectivity and roughness. 根據這些公式的計算結果表明;雨區回波功率與不考慮這些因素情況下的值相比較;可有-3至+6分貝的偏差;具體值取決於雷達離地高度、天線仰角、雷達波長、波束寬度、地表反射係數和粗糙度等.
- Due to the frequency selectivity, non-stationary and multipath effect of the ionosphere, it is difficult to measure the beam width of OTHR antenna in azimuth of this kind of radar. 摘要由於傳輸通道電離層存在頻率選擇性、非平穩性和多徑效應，對天波超視距雷達的方位波束寬度性能進行測試存在著相當的困難。
- In case of electronic scanning the beam width is broader by a factor of two . 電子掃描時，波束寬度展寬一倍。
- The results show that this DBF design can adjust the magnitude and phase of each channel,digitally forming antenna beam. 實驗結果表明,該數字波束形成設計能實時調整各通道的幅度和相位,實現數字波束形成。
- Combining genetic algorithm with LMS,a hybrid genetic algorithm(GA_LMS)for satellite adaptive nulling antenna beam space was proposed. 將遺傳演算法與LMS演算法結合構成一種混合遺傳演算法,並將其用於衛星自適應調零天線的波束空間調零處理。
- It can perform a flexible emissive and receiving antenna beam and have a good anti-jamming ability.This thesis is a previous research before engineering fulfillment. 本文設計了用可實現模擬多種不同工作體制、具有靈活可變的收發波束和較好抗干擾能力的雷達天線平台，為工程實現提供了理論支持。
- It is important to eliminate or degrade the effect caused by the beam width of echo sounders and reflect the true seabed. 為提高海底地形的測量精度，應消除或減弱波束角效應影響。
- When the initial power equals the critical power, a stabile spatial soliton is obtained, and generally the beam width takes periodical contraction or diffraction. 當初始功率等於臨界功率時,可以得到一個穩定的空間孤子,而一般情形下,束寬則作周期的壓縮或展寬變化。
- Results are satisfactory. this method can be applied to multibeam synthesis for arbitrary set of nonuniform elements, as well as beam width stretch and sector shaped beamforming. 該方法可用於任意單元構成的不均勻陣列天線;還可用于波束展寬及扇形波束的合成 In this paper; an effective method of multibeam smart antennas pattern synthesis for base station using digital beamforming technique is presented.
- Because the adjustment of antenna beam direction is in a very small range, so the effection on antenna sidelobe and beamwidth can be omitted, that is to say, it will not make any effection on other performances of the radar system. 由於對天線波束指向的調整在很小的範圍內，故對天線的副瓣及波瓣寬度指標的影響可忽略，從而不會影響到雷達系統的基他性能。
- Compared with the conventional array receiver, optimal transmitting beam width decreases and transmitting power requirement is debased in the distributed array receiver. 與傳統式陣列相比,分散式陣列可以採用更窄的發射光束寬度,降低對發射功率的要求。
- When the input power is smaller than the critical power, the beam width takes quasi-periodical diffraction with the Jacobian elliptic sine and elliptic cosine functions. 當光束初始功率小於臨界功率時，光束束寬則按雅可比橢圓正弦函數和橢圓餘弦函數作準周期展寬變化；
- Technical specifications are all satisfied within required wide frequency range, which include VSWR, main beam width, sidelobe level, gain, and the mutual relation of sum and difference patterns, etc. 在較寬的頻帶內，對於駐波比，主瓣寬度，旁瓣電平，增益，和 與差方向圖對應關係等都得到了滿足。
- The critical power ofthe strongly nonlocal soliton is proportion to the 2th power of the characteristic lengthof the response function and in inverse proportion to the 2th power of beam width. 強非局域孤子的臨界功率與非局域特徵寬度的2次方成正比，與光束束寬的2次方成反比。
- The relative errors of the beam width and far-field divergence angle introduced by the spherical aberration increase with increasing spherical aberration coefficient and decreasing beam order. 束寬和遠場發散角的相對誤差隨球差係數絕對值的增加和光束階數的減小而增加；
- The critical power of the strongly nonlocal soliton is proportion to the 4th power of thecharacteristic length of the response function and in inverse proportion to the 4th powerof beam width. 另外，分析了孤子的傳輸特性，強非局域孤子的臨界功率與非局域特徵長度的4次方成正比，與光束束寬的4次方成反比。
