Broadband HEMT Amplifier for 26.5 - 40.0 GHz

A broadband amplifier operating over 26.5 to 40 GHz has been developed by using 0.25-µm gate HEMTs. The amplifier has been fabricated by cascading five unit amplifiers. Two balanced-type unit amplifiers are used in an input and an output stages to realize good input/output VSWRs . Three single-ended unit amplifiers are installed in the intermediate stages to achieve higher gain. The developed amplifier shows a noise figure of <= 7.0 dB, a gain of 18.2 +- 1.6 dB and inputfoutput VSWRs of <= 2.0 over 26.5 to 40 GHz.

[2]  M. Sholley,et al.  60 and 70 GHz (HEMT) Amplifiers , 1986, 1986 IEEE MTT-S International Microwave Symposium Digest.

[3]  S. Kamihashi,et al.  Multiconductor Couplers , 1978 .

[4]  J. Berenz,et al.  36.0 - 40.0 GHz HEMT Low Noise Amplifier , 1985, 1985 IEEE MTT-S International Microwave Symposium Digest.

[5]  H. Kawasaki,et al.  Broadband HEMT and GaAs FET Amplifiers for 18 - 26.5 GHz , 1985, 1985 IEEE MTT-S International Microwave Symposium Digest.