Title :
An 8.8–9.8 GHz 100W hybrid solid state power amplifier for high power applications
Author :
Forouzanfar, Mehdi ; Feghhi, Rouhollah ; Joodaki, Mojtaba
Author_Institution :
Dept. of Electr. Eng., Ferdowsi Univ. of Mashhad, Mashhad, Iran
Abstract :
This paper presents an 8.8-9.8 GHz hybrid power amplifier (PA) designed with GaN HEMT bare die transistors. Generally, hybrid X-band high power amplifier (HPA) suffers from relatively low bandwidth. However, this paper introduces wideband high gain power amplifier, by using low loss Wilkinson combiner/divider, a modified form of taper-based divider, and wideband matching structures. The optimum values of all elements are determined by using Random and Gradient algorithms. The microstrip matching structures are realized on Rogers4003 and RT/druid5880 substrates. Large-signal simulation results show peak efficiency of 40%, an output power of 100 W and power gain of 50 dB at 9.5GHz. The input and output return losses are respectively less than -12 dB and -10 dB.
Keywords :
HEMT circuits; III-V semiconductors; gallium compounds; gradient methods; hybrid integrated circuits; impedance matching; microwave integrated circuits; microwave power amplifiers; power combiners; power dividers; wide band gap semiconductors; GaN; HEMT bare die transistor; frequency 8.8 GHz to 9.8 GHz; gain 50 dB; gradient algorithms; high power applications; hybrid X-band high power amplifier; hybrid power amplifier; hybrid solid state power amplifier; low loss Wilkinson combiner; low loss Wilkinson divider; microstrip matching structures; power 100 W; random algorithms; taper based divider; wideband high gain power amplifier; wideband matching structures; Gallium nitride; HEMTs; Power amplifiers; Power generation; Wideband; GaN HEMT; High Power Amplifier(HPA); Power Added Efficiency (PAE); Solid State Power Amplifiers(SSPA); X-band;
Conference_Titel :
Electrical Engineering (ICEE), 2014 22nd Iranian Conference on
Conference_Location :
Tehran
DOI :
10.1109/IranianCEE.2014.6999579
