Title :
Power-combining grids for frequency tuning and beam control applications
Author :
Liang Quan Sun ; Weikle, R.M., II
Author_Institution :
Sch. of Eng. & Appl. Sci., Virginia Univ., Charlottesville, VA, USA
Abstract :
Two new quasi-optical power combining architectures are presented. A coplanar waveguide (CPW)-fed bowtie antenna array is used to combine the outputs of 16 FET´s at 4.7 GHz with a DC-to-RF conversion efficiency of 17%. The arms of the bowtie antennas provide space to accommodate planar tuning and matching networks. A second power-combining array, consisting of 16 FET chips, uses integrated varactors for frequency tuning at 20 GHz. Experimental results for both types of power-combining grid are presented.
Keywords :
circuit tuning; coplanar waveguides; impedance matching; microstrip antenna arrays; microwave oscillators; power combiners; varactors; 17 percent; 20 GHz; 4.7 GHz; CPW-fed bowtie antenna array; DC/RF conversion efficiency; FET chips; beam control applications; coplanar waveguide feed; frequency tuning; integrated varactors; planar matching networks; planar tuning networks; power-combining grids; quasi-optical power combining architectures; Antenna arrays; Antenna feeds; Arm; Circuits; Coplanar waveguides; Frequency; HEMTs; Oscillators; Tuning; Varactors;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705172
