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Narrowband amplifier with excellent power combining efficiency

Narrowband amplifier with excellent power combining efficiency

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© The Institution of Engineering and Technology
Published

Based on a coaxial waveguide power-dividing/combining circuit, a four-device solid-state power amplifier with excellent power combining efficiency is presented. The fabricated power amplifier combining four monolithic microwave integrated circuit power amplifiers shows a 13–16.65 dB small-signal gain over a wide bandwidth of 7–13.5 GHz. The measured maximum output power at 1 dB compression is 25.4 dBm at 11 GHz, with a power-combining efficiency of 91%.

Inspec keywords: power amplifiers; coaxial waveguides; MMIC; power combiners

Other keywords: bandwidth 7 GHz to 13.5 GHz; frequency 11 GHz; solid-state power amplifier; fabricated power amplifier; monolithic microwave integrated circuit; power-combining efficiency; power-dividing/combining circuit; gain 13 dB to 16.65 dB; narrowband amplifier; coaxial waveguide

Subjects: Waveguide and microwave transmission line components; Waveguides and microwave transmission lines; Amplifiers; Microwave integrated circuits

References

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      • X. Jiang , S.C. Ortiz , A. Mortazawi . A Ka-band power amplifier based on the traveling-wave power-dividing/combining slotted-waveguide circuit. IEEE Trans. Microw. Theory Tech. , 2 , 633 - 639
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      • D.M. Pozar . (1990) Microwave engineering.
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      • P. Jia , L.-Y. Chen , A. Alexanian , R.A. York . Broad-band high-power amplifier using spatial power-combining technique. IEEE Trans. Mircow. Theory Tech. , 12 , 2469 - 2475
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      • N.S. Cheng , T.P. Dao , M.G. Case , D.B. Rensch , R.A. York . A 120-watt X-band spatially combined solid state amplifier. IEEE Trans. Mircow. Theory Tech. , 12 , 2557 - 2561
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      • K. Song , Y. Fan , Y. Zhang . Broad-band power divider based on radial waveguide. Microw. Opt. Tech. Lett. , 3 , 595 - 597
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