As the important component to lengthen the communication distance and enlarge the covering area of wlan , the power amplifier ( pa ) and antenna functions with more and more significance 隨著wlan的廣泛應用,作為增加wlan通信距離、增大wlan覆蓋范圍的重要的高頻部件? ?雙向功放和天線的作用越來越重要。
Since the envelope of modulated signal fluctuates , these methods generate unwanted intermodulation distortion ( imd ) products in a nonlinear radio frequency ( rf ) power amplifier ( pa ) . so it is necessary to use linearization technique to reduce the adjacent channel interference ( aci ) 但包絡變化的調(diào)制信號經(jīng)過非線性射頻功放后會產(chǎn)生交調(diào)分量,因此必須采用線性化技術來減少由此產(chǎn)生的鄰道干擾。
With 8mm mmw integrated circuit , a power amplifier ( pa ) is successfully developed in my project , an researching project of " ten - five " . problems such as the difficulties in devices of small volumes designing and manufacturing caused by high frequency and short wavelength are solved 本文結合“十五”軍事電子預研課題,實現(xiàn)了一種基于毫米波mmic功率放大芯片的毫米波功率放大器的研制,以及在此基礎上的混合集成高效平面結構的功率合成技術的研究,以進一步提高功率。
In order to verify memory effects of nonlinear power amplifier ( pa ) and to design and optimize pa with reducing memory effects , this paper analyzes existence of electrical and thermal memory effects with different tone spacing two - tone input signal and modulated signal source through mathematical derivation and advanced design system ( ads ) software simulation , and presents a method which can optimize pa with memory effects 摘要為了證實非線性功放記憶效應的存在同時為了設計和優(yōu)化功放以減小記憶效應,通過理論推導和ads仿真的方法分析了不同間隔的雙音輸入和調(diào)制輸入的情況下電記憶和熱記憶效應的存在,同時提出了種優(yōu)化功放記憶效應性能的方法。