نتایج جستجو برای: doherty power amplifier

تعداد نتایج: 501236  

Mahmoud Mohammad-Taheri

A complete procedure for the design of W-band low noise amplifier in MMIC technology is presented. The design is based on a simultaneously power and noise matched technique. For implementing the method, scalable bilateral transistor model parameters should be first extracted. The model is also used for transmission line utilized in the amplifier circuit. In the presented method, input/output ma...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1388

a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...

2010
Mohammad Reza Ghajar

I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. Abstract The rapid evolution of wireless communication technologies increased the need for handheld devices that can support dissimilar standards or bette...

Journal: :Progress In Electromagnetics Research 2014

2011
Byeong-Ok Lim Jae-Hee Yoon Hee-Chang Park Hyoung-Ju Kim

In this paper, we have developed a high power solid-state power amplifier (SSPA) for Sband military radars. The SSPA consists of a high power amplifier (HPA) module combined GaN based power amplifier pallets, a drive amplifier (DA) module, a digital control module and a power supply unit. The SSPA shows the total output power of 62 dBm in S-band.

Journal: :journal of computer and robotics 0
mahmoud mohammad-taheri faculty of electrical, computer and it engineering, qazvin branch, islamic azad university, qazvin, iran

a complete procedure for the design of w-band low noise amplifier in mmic technology is presented. the design is based on a simultaneously power and noise matched technique. for implementing the method, scalable bilateral transistor model parameters should be first extracted. the model is also used for transmission line utilized in the amplifier circuit. in the presented method, input/output ma...

2012
Yoshiaki Kumagai Hiroaki Maeda

Long Term Evolution (LTE) systems are attracting attention as next-generation mobile communication systems. Such systems have come to transfer and manage large volumes of data at high speed. Therefore, base stations have urgent requirements for devices that are friendlier to the environment, easier to install and cheaper to run. Further, there are needs to reduce size and power consumption. Thi...

Journal: :IEEE Transactions on Microwave Theory and Techniques 2008

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