A Study of LDMOS Switched Mode Power Amplifiers
نویسندگان
چکیده
منابع مشابه
DEPARTMENT OF TECHNOLOGY AND BUILT ENVIRONMENT A Study of Different Switched Mode Power Amplifiers for the Burst Mode Operation
Power-amplifier efficiency is a significant issue for the overall efficiency of most wireless system. Therefore, currently there are different kind of Switched mode power amplifiers are developed which are showing very high efficiency also at higher frequencies but all of these amplifiers are subjected to drive with the constant envelope signals. Whereas, for the increasing demand of high data ...
متن کاملPrediction of IMD in LDMOS Transistor Amplifiers Using a New Large-Signal Model
In this paper, the intermodulation distortion (IMD) behavior of LDMOS transistors is treated. First, an analysis is performed to explain measured IMD characteristics in different classes of operation. It is shown that the turn-on region plays an important role in explaining measured IMD behavior, which may also give a clue to the excellent linearity of LDMOS transistors. Thereafter, with this k...
متن کاملA new generation of Gallium Nitride (GaN) based Solid State Power Amplifiers for Satellite Communication
The introduction of Gallium Nitride High Electron Mobility Transistors (GaN HEMT) in early 2000 has left an undeniable mark on the entire satellite communication landscape. It is now possible for the first time since the introduction of the Solid State Microwave Technology to design and manufacture Power Amplifiers that exceed by several orders of magnitude the reliability, linearity, power den...
متن کاملDigital Predistortion of Power Amplifiers for Multichannel Wireless Systems
An LDMOS RF high power amplifier with improved intermodulation distortion performance using digital predistortion is presented. The application of digital linearization method is being tested with the help of circuit simulation software ADS.
متن کاملBasic considerations and topologies of switched-mode assisted linear power amplifiers
The paper presents a combined power amplifier system consisting of a linear amplifier unit with a switched-mode (class D) current dumping stage arranged in parallel. With this topology the fundamental drawback of conventional linear power amplifiers the high loss is avoided. Compared to a pure class D (switching) amplifier the presented system needs no output filter to reduce the switching freq...
متن کامل