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Amplitude/Phase Temperature Compensation Attenuators With Variable- Q FET Resonators

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5 Author(s)
Hangai, M. ; Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kamakura ; Asao, H. ; Hieda, M. ; Yamaguchi, M.
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Amplitude/phase temperature compensation attenuators have been developed. The circuits are based on new variable-Q field-effect transistor resonators. By employing the configuration, the dynamic range of the attenuation and the phase-shift can be flexibly determined. To verify this methodology, we have fabricated a low phase-shift temperature compensation attenuator and an amplitude/phase temperature compensation attenuator with monolithic microwave integrated circuit technology. The low phase-shift circuit achieved an attenuation dynamic range of 16.9 dB, a phase shift of plusmn5.2deg, and a minimum insertion loss of 4.5 dB in X-band over 75degC temperature variation. The amplitude/phase compensation circuit achieved an attenuation dynamic range of 11.7 dB, a phase shift of +37deg, and a minimum insertion loss of 4.9 dB in X-band over 75degC temperature variation.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:56 ,  Issue: 12 )

Date of Publication:

Dec. 2008

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