dual-band 中文意思是什麼

dual-band 解釋
雙頻
  • dual : adj. 二的；二重的；二體的；二元的。 dual personality 雙重人格。n. 【語法】雙數；【數學】對偶。 the D- Monarchy 雙重君主國〈指第一次世界大戰前的奧匈帝國〉。
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. A high efficiency dual - band rf power amplifier has an output and / or input of a high frequency transistor well terminated at the second harmonic frequency for dual - band operation

    本發明乃一種高效率雙頻射頻功率放大器，提供高頻電晶體的輸出端與?或輸入端于雙頻操作中有良好的二階諧波終止。
  2. According to negative temperature coefficient of vbe and positive temperature coefficient of vt, a framework of band - gap voltage reference is investigated. the reference offer a source of pir, distributed three voltage, one as upper - threshold voltage of dual - threshold comparator, the other as lower - threshold voltage of comparator, the other as direct current voltage for second band - pass filter amplifier

    同時利用pnp晶體管發射結電壓的負溫度特性和發射結差值電壓的正溫度特性設計了一個帶隙基準電壓源。此帶隙基準電壓源本身作為熱釋電紅外傳感器的電源電壓，同時分壓提供雙限電壓比較器的上限電平和下限電平以及第二級帶通濾波放大器的直流電平。
  3. Dual band multi - layer advanced load management

    雙頻多層網話務流量控制
  4. Diode switches or voltage controlled varactors implement dual - band resonators such that they can offer low impedance at the second harmonic of each frequency band, while, in some cases, presenting high impedance at the fundamental frequency as an rf choke circuit

    利用二極體開關或電壓控制變容器實施雙頻共振器以提供在雙頻操作中每一個頻段之二階諧波的低阻抗，同時在一些實施例里也提供主頻段的高阻抗、兼具有射頻阻塞電路作用。
  5. Secondly, because the band of the traditional microstrip antenna is very narrow. and the isolation can ’ t meet the requirement when the coaxial - line feeding is used to realize the dual polarization. the following work lays heavy stress on analysis of the way of widening the bandwidth and developing the isolation of the antenna

    傳統的微帶天線帶寬較窄，採用普通同軸線饋電實現雙極化的時候，隔離度不能夠滿足天線的要求，所以在接下來工作中，重點分析了微帶天線頻帶展寬和隔離度改善的方法。
  6. Using a dual - band mobile phone, which works in both the 900mhz and 1800mhz bands, will also give you a better chance of successfully contacting the 999 emergency centre

    此外，雙頻型號的行動電話能在900兆赫及1800兆赫的波段內操作，因此，有較大機會成功聯絡999緊急熱線中心。
  7. The result shows that the ability of anti - interference from strong - narrow band can be improved by using albefaction filter, the interference resisting property of the dual tap filter is much better than that of predicted error filter

    模擬結果表明，加白化濾波器確實能提高系統的抗強窄帶干擾的能力，同時也表明雙向抽頭濾波器的抗干擾性能比預測誤差橫向濾波器的性能要好。
  8. 7. based on the comparison with dual band gps phase and c / acode, ambiguity function method, least squares search, ambiguity solution covariance, cholesky disintegrate and least square ambiguity decorrelation adjustment, it is considered the method of ambiguity function using double gps antennas to move baseline and the equation of dual differential carrier phase

    在分析雙頻p碼偽距法、模糊度函數法、最小二乘搜索法、模糊度協方差法、 cholesky分解法、和lambda演算法的基礎上，重點研究基於雙gps天線動一動基線載波相位雙差整周模糊度確定方法。
  9. For the sake of making user randomly communicate between gsm900 and dcs1800 networks with a single handset, this thesis devoted to design and realize a rf ( radio frequency ) subsystem for gsm900 / dcs1800 dual band handset according to gsm 05. 05 protocol provided by etsi, which the structure of single board can realize gsm900 / dcs1800 dual band of the handset

    為了使用戶可用一部手機在gsm900 dcs1800兩個移動通信網上自動漫遊通話，本論文根據歐洲電信標準學會（ etsi ）提出的gsm05 . 05協議，設計實現gsm900 dcs1800雙頻段手機中射頻子系統。它單片的實現了手機的雙頻段gsm900 dcs1800 ，而且隨時可以根據網路的需要，實現無縫（不斷線）自動切換。
  10. When all of the dual - band network equipment is made by the same manufacturer and the gsm 1800 network has reached a considerable scale, the support of gprs by both bands can be considered

    當雙頻網路設備為同一廠家，並且gsm1800有相當的規模時，可以考慮在兩個頻段同時支持gprs 。
  11. Secondly, a microstrip antenna used in portable reader and the two novel tag antennas which are a dual - band dipole antenna and a circular polarized microstrip antenna are developed

    提出並研製了新型的雙頻段（ 900mhz / 2 . 4ghz ）電子標簽天線、圓極化微帶型標簽天線以及便攜式讀出裝置用微帶天線。
  12. In this thesis, one kind of the dual - band dual - polarized antenna is mainly researched

    本文就主要針對一種雙頻雙極化天線進行研究。
  13. The test results accord with the simulation results well. grounded on the simulation and measurement, it proves that this antenna can be the dual - band dual - polarized antenna unit

    最後，對天線陣元進行組陣分析，研究了天線單元間距對天線方向圖的影響，並得出了優化的天線陣元間距值。
  14. As the vigorous development of the mobile communication technology, the research of the dual - band dual - polarized antenna is very urgent. it is also of theoretical significance and practical value

    隨著移動通信技術的發展，對雙頻雙極化基站陣列天線的研究就變得十分迫切，同時也具有理論意義和實用價值。
  15. Thirdly, based on the analysis of the microstrip antenna above, the dual - band dual - polarized antenna is designed and simulated. the simulation results meet the results of the requirement of the antenna design

    在以上對微帶天線分析的基礎上，對雙頻雙極化天線單元進行了設計與模擬，模擬結果較好的達到了天線設計要求。
  16. In current communication system, the application of dual - band dual - polarized antenna satisfies the needs of communication system ’ s upgrade, solves the problem of multipath fading, reduces the number and lowers the cost of the antennas

    在現代通信系統中，雙頻雙極化天線的應用能夠滿足通信系統的不斷升級的要求，能有效解決多徑衰落問題，能減少天線數量、降低天線成本。
  17. Dual band seamless handovers

    雙頻無縫切換
  18. Dual - band terminal

    雙頻終端
  19. Moreover, cutting the top patch into two or three sub - patches can meet the dual - band even multi - band operation. the effects of mobile handsets case and bandwidth are investigated chapter 2 gives system concerns of mobile antenna design

    此外，頂部貼片劃分為兩個或者更多的小貼片能夠使天線在雙頻、三頻甚至多頻工作。
  20. Dual - band mobile phone

    雙頻手機
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