Abstract: The efficiency and linearity of power amplifiers based on the LINC technique are discussed. The use of resistive combiners as well as lossless Chireix combiners are detailed and their impact on amplifier linearity and efficiency are highlighted. The tradeoffs between linearity and efficiency in Chireix combiners are investigated experimentally and optimal choice of Chireix combiners i...

A new wireless communication system denoted as Multi-Code Multi-Carrier CDMA (MC-MC CDMA), which is the combination of Multi-Code CDMA and Multi-Carrier CDMA, is analyzed in this paper. This system can satisfy multi-rate services using multi-code schemes and muti-carrier services used for high rate transmission. The system is evaluated using Traveling Wave Tube Amplifier (TWTA). This type of am...

Enabled by Lee de Forest's invention of the vacuum tube triode in 1906, power amplification of electrical signals has played a key function in electronic systems ever since. Mundane devices we take for granted such as the telephone, the radio, or the television would not exist without this capability. Given such a wide application space, it is not surprising that early on electrical engineers h...

The previous literature on tuned power amplifiers has not made clear the fundamental differences between amplifiers in which the output device acts 1) as a current source, or 2) as a switch. Previous circuits have often operated in contradiction to their design assumptions, resulting in the need for “cut-and-try” design. The new class of amplifiers deseribed here is based on a load network synt...