Title :
A slotted-waveguide power amplifier for spatial power-combining applications
Author :
Bashirullah, Rizwan ; Mortazawi, Amir
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
7/1/2000 12:00:00 AM
Abstract :
A power-amplifier array based on a slotted-waveguide power divider is presented for quasi-optical applications. The advantages of this structure are its low profile and ease of fabrication. Furthermore, efficient heat sinking of power devices is achieved. An X-band version of the power amplifier using eight MESFET´s was designed and fabricated. An output power of 14 W was obtained. At 10 GHz, the amplifier gain and power-combining efficiency were 6.7 dB and 88%, respectively. The 3-dB bandwidth for the circuit was approximately 5%. This technique has the potential to meet the increasing demand for solid-state power amplifiers used in millimeter-wave communications and radar systems
Keywords :
MESFET circuits; arrays; microwave power amplifiers; millimetre wave power amplifiers; power combiners; power dividers; slot line components; 10 GHz; 14 W; 6.7 dB; 88 percent; MESFET; X-band version; power device heat sinking; power-amplifier array; quasi-optical applications; slotted-waveguide power amplifier; slotted-waveguide power divider; solid-state power amplifiers; spatial power-combining applications; Bandwidth; Fabrication; Heat sinks; MESFETs; Millimeter wave communication; Power amplifiers; Power dividers; Power generation; Radar; Solid state circuits;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
