貼片元件 的英文怎麼說
中文拼音 [tiēpiānyuánjiàn]
貼片元件
英文
comp_smd-
Themal reliefs are sometimes also used on vias very near, or in, pads of smt components for the same reason
基於同樣的原因，限熱槽也用於貼片元件內或離元件很近的焊盤。Today, the most advanced alignment methods have used the technology of machine vision and image proceeding, by which the feature marks on dies or substrate are recognized or measured, by which machine movement equipments are leaded to complete alignment. die leveling and auto - focus usually be completed before vision - based alignment of die and substrate
自動對準系統是自動貼片機中的關鍵組件之一，現階段最先進的對準方法是利用機器視覺和圖像處理技術來識別和測量微細標記特徵，然後反饋給控制系統引導機械裝置進行對準定位，在對準之前還必須對晶元進行「調平」以及實現「對焦」獲得清晰的標記圖像。Key technologies are first introduced here such as the phased array antenna theory, dbf ( digital beam forming ) theory and the configuration of transmit and receive ( t / r ) modules. then part of analog circuitry is optimized with the digital technology. cell circular microstrip disk antenna successfully developed based on the theory of microstrip antenna, the four - celled circular microstrip disk antenna arrays are designed, simulated and analyzed with eda tools - hfss, opt1metrics
本文以相控陣雷達組成為主軸，逐一對相控陣雷達關鍵技術中的天線陣原理、數字波束形成（ dbf ）技術和收發（ t r ）組件組成進行詳細的分析，利用數字技術對傳統相控陣雷達設計方案中的模擬電路部分進行改進；在理論設計單元圓形微帶貼片天線單元的基礎上，利用微波模擬軟體hfss和optimetrics對四單元的圓形微帶貼片天線陣進行設計與模擬；對相控陣雷達的幅相監測技術進行理論分析和討論，選擇最佳的幅相監測方案。It is comprised of a sensor head ( a quadrangular pyramid tip, a base, four quartz crystal plates ) and a network analyzer and an apparatus to apply three - axis force. according to mechanics, four plates of the quadrangular pyramid tip correspondingly receive four one - dimension forces when applying a three - axis force to the sensor head. because quartz crystal has a force - frequency effect, namely, resonance frequency change of the quartz crystal is in direct proportion to one - dimension forces applying to it, four certain resonance frequency changes of the four quartz crystal plates are corresponding to a three - axis force
當傳感頭受三軸力作用時，根據力學的分析可以確定三軸力與四角錐體四個面上單向力之間的對應關系，用分別貼在四角錐體四個面上的四片壓電石英晶體作為壓敏元件，由於石英晶體的力頻效應（即石英晶體在受到應力作用時，它的諧振頻率與應力大小成正比） ，從而最終確定了四片石英晶體的諧振頻率改變量與傳感頭上所受三軸力大小和方向之間的對應關系。分享友人