Title :
Numerical and experimental investigation of losses in a tray based spatial power amplifier
Author :
Al-Zayed, A. ; Ortiz, S. ; Ozkar, M. ; Mortazawi, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
This paper presents experimental and numerical investigations on a 49-element Ka-band amplifier array. This study is aimed at determining the origin of various losses in the amplifier array. Passive simulation data confirms that the load seen by the active devices is well matched and that most of the power is coupled to the LSE/sub 10/ mode. This means that coherent power combining should take place if there is no phase and amplitude variation due to the active devices and phase correcting dielectric lenses.
Keywords :
MMIC power amplifiers; dielectric-loaded waveguides; electronic engineering computing; finite difference time-domain analysis; horn antennas; microstrip antennas; millimetre wave power amplifiers; power combiners; FDTD simulations; Ka-band amplifier arrays; MMIC amplifiers; active device load matching; coherent power combining; dielectric filled waveguides; hard-horn antennas; microstrip patch antennas; phase correcting dielectric lenses; phase/amplitude variation; power combiners; power coupling; tray based spatial power amplifier losses; Antenna arrays; Dielectrics; Feeds; Frequency; Lenses; Microstrip antenna arrays; Microstrip antennas; Patch antennas; Phased arrays; Power amplifiers;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210520
