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In this paper we demonstrate high gain, high efficiency, single and balanced Doherty power amplifiers (PAs) that have the ability to transmit signals which occupy the full frequency band from 1930MHz–1995MHz. The PAs have been designed using a new generation of Freescale LDMOS power transistors [1], in which the drain side video-bandwidth (VBW) has been enhanced. For the first time we will show the...
This paper presents the design of a bondwire antenna with detailed equations showing the derivation of the radiated power, radiation pattern, and the transmitter to receiver link-budget for a bondwire-antenna for short-range radio communications in the 6.5 GHz frequency range. The bondwire antenna is then used to design a high-gain, narrowband duplexer-less LNA/PA blocks for a transceiver with the...
This paper presents the design of a bondwire antenna with detailed equations showing the derivation of the radiated power, radiation pattern, and the transmitter to receiver link-budget for a bondwire-antenna for short-range radio communications in the 6.5 GHz frequency range. The bondwire antenna is then used to design a high-gain, narrowband duplexer-less LNA/PA blocks for a transceiver with the...
This paper proposes a measurement setup for analyzing and measuring the nonlinearity and memory effects in active power device as well as power amplifier (PA). In order to reduce the memory effect in the measurement data, new dynamic measurement setup with combination of two bias tees is developed for realizing short termination at envelope frequencies. Furthermore, for full automatic control of the...
The influence of envelope source and load terminations on the RF performance of high power GaN amplifiers is investigated. An error-corrected two-tone measurement system has been developed enabling load- and source pull measurements in the envelope frequency bandwidth. Measured results on a 0.5 /spl mu/m-HEMT with a gate width of 8/spl times/125 /spl mu/m show a variation of 1 dB output power and...
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