A Ka-band power-combined amplifier based on a six-way quasi-planar power divider/Combiner

Abstract

A Ka-band power-combined amplifier is presented based on a six way quasi-planar power divider/combiner. The directional coupler and three-stage travelling wave waveguide power divider/combiner are combined and analyzed respectively. The measured passive result shows that the back-to-back insertion loss is less than 1.5dB over the frequency range of 27-33GHz, which demonstrates the low-loss performance of the proposed dividing/combing structure. Based on the passive power divider/combiner, a six-way power-combined amplifier has been implemented with six medium power amplifier chips. The measured P-1dB of the power-combined amplifier is greater than 26.5dBm in this frequency band. The obtained combining efficiency is about 83-89%.

A New Theoretical Approach of Studying Resonances in Single Finline Transitions

“…HPAs can work either in pulsed or continuous mode and tubes are nowadays the best option in case of pulsed mode for megawatt output powers in RADAR applications. Concerning SSPAs (Solid State Power Amplifiers) in recent years kilowatthigh frequency continuous wave have been developed along with new HPAs design strategies and architectures [6][7][8][9][10][11][12][13][14][15]. The most efficient and compact structure capable of delivering large amounts of power in the range of millimeter waves is certainly the one called Spatial Power Amplifier (SPA), or Spatial Power Combiner (SPC).…”