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Microwave frequency agile active filter with distributed and MMIC elements

Microwave frequency agile active filter with distributed and MMIC elements

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A microwave agile active filter is presented which uses microwave integrated circuit (MIC) and monolithic microwave integrated circuit (MMIC) technologies. The resonators consist of a modified MIC half wavelength resonator λ/2 with an MMIC amplifier and phase shifter for feedback. They provide extremely low loss and high Q values. A microwave high-Q active bandpass filter is realised using a varactor diode for tuning.

Inspec keywords: active filters; circuit feedback; MMIC amplifiers; microwave integrated circuits; band-pass filters; hybrid integrated circuits; Q-factor; circuit tuning; varactors; resonators; MMIC phase shifters; microwave filters

Other keywords: MMIC amplifier; MMIC elements; distributed elements; monolithic microwave integrated circuit; low loss; MIC technology; high Q values; MMIC phase shifter; modified MIC half wavelength resonator; microwave agile active filter; varactor diode tuning; microwave integrated circuit; active bandpass filter; feedback

Subjects: Microwave integrated circuits; Hybrid integrated circuits; Semiconductor integrated circuits; Active filters and other active networks

References

    1. 1)
      • H. Trabelsi , C. Cruchon . A varactor-tuned active microwave bandpass filter. IEEE Microw. Guid. Wave Lett. , 6 , 231 - 232
    2. 2)
      • C.Y. Chang , T. Itoh . Narrowband planar microwave active filter. Electron. Lett. , 18 , 1228 - 1229
    3. 3)
      • Chang, C.Y., Itoh, T.: `A varactor-tuned active microwave band-pass filter', IEEE MTT-S. Dig., 1990, p. 499–502.
    4. 4)
      • Jiao, H., Guillon, P., Madrangeas, B.: `Microwave frequency agile active filters for MIC and MMIC applications', IEEE MTT-S Symp. Dig., 1990, p. 503-506.
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19981457
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