Dual-mode dielectric resonator bandstop filter
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United States of America Patent
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Aug 25, 1998
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N/A
app pub date -
Jun 3, 1996
filing date -
Jun 3, 1996
priority date (Note) -
Expired
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Abstract
An electromagnetic bandstop filter comprises a microwave circuit, at least one microwave resonator, coupling means that couples electromagnetic energy to and from the microwave resonator, and an impedance transformer coupled to, and in series with, the coupling means, wherein the transformer is coupled to the resonator only through the coupling means, and wherein the impedance transformer is shunt coupled to the microwave circuit. The impedance transformer comprises at least two series-connected transmission line sections of different impedances.
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