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Quality and performance of tunable waveguide backshorts

Quality and performance of tunable waveguide backshorts

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© The Institution of Electrical Engineers
Published

A technique is presented for determining the quality of tunable short circuits used as backshorts in waveguide mixers. A backshort, suitable for use in a reduced height 345 GHz Schottky mixer block, has been fabricated in a novel manner and the VSWR determined, using our technique, to be >90 at room temperature.

Inspec keywords: solid-state microwave circuits; tuning; mixers (circuits); waveguide components

Other keywords: short circuits; 345 GHz; VSWR; waveguide mixers; submillimetre wavelengths; MM-wave circuit; Schottky mixer block; reduced height; tunable waveguide backshorts; THF

Subjects: Modulators, demodulators, discriminators and mixers; Solid-state microwave circuits and devices; Waveguide and microwave transmission line components

References

    1. 1)
      • F.J. Tischer . Excess conduction losses at millimetre wavelengths. IEEE Trans. , 11 , 853 - 858
    2. 2)
      • M.K. Brewer , A.V. Räisänen . Dual-harmonic non-contacting millimetre waveguide backshorts: Theory, design and test. IEEE Trans. , 5 , 708 - 714
    3. 3)
      • S.R. Davies , L.T. Little . The effect of mixer mount loss on the performance of SIS receivers. Int. J. of IR and MM Waves , 2 , 89 - 100
    4. 4)
      • R.L. Eisenhart , P.J. Khan . Theoretical and experimental analysis of a waveguide mounting structure. IEEE Trans. , 706 - 719
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