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1887

Shunt-inductance-coupled waveguide filters with expanded second stopband

Shunt-inductance-coupled waveguide filters with expanded second stopband

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© The Institution of Electrical Engineers
Published

A computer-aided design is described for inductive iris and inductive double-strip coupled filters with increased-width resonator sections. The theory includes both the higher-order-mode interaction of all discontinuities and the finite thickness of the irises and inserts. The step-wall discontinuity effect is included in the optimisation process as an additional design parameter. Design examples for midband frequencies of about 11 and 16 GHz are given; the corresponding stop-band attenuation is higher than 50 dB, or 40 dB, up to 18.5 GHz, or 24.5 GHz, respectively.

Inspec keywords: passive filters; CAD; band-stop filters; microwave filters; waveguide components

Other keywords: shunt inductance coupled filters; computer-aided design; step-wall discontinuity effect; higher-order-mode interaction; stop band attenuation; microwave filters; inductive iris; optimisation process; discontinuities; waveguide filters; finite thickness; expanded second stopband; inductive double-strip coupled filters; midband frequencies

Subjects: Waveguide and microwave transmission line components; Design; Passive filters and other passive networks

References

    1. 1)
      • Y. Konishi , K. Uenakada . The design of a bandpass filter with inductive strip—Planar circuit mounted in waveguide. IEEE Trans. , 869 - 873
    2. 2)
      • H. Patzelt , F. Arndt . Double-plane steps in rectangular waveguides and their application for transformers, irises and filters. IEEE Trans. , 155 - 163
    3. 3)
      • R. Vahldieck , J. Bornemann , F. Arndt , D. Grauerholz . W-band low-insertion loss E-plane filter. IEEE Trans.
    4. 4)
      • G.L. Matthaei , L. Young , E.M.T. Jones . (1964) , Microwave filters, impedance-matching networks, and coupling structures.
    5. 5)
      • F. Arndt , J. Bornemann , R. Vahldieck , D. Grauerholz . E-plane integrated circuit filters with improved stopband attenuation. IEEE Trans. , 1391 - 1394
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