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AssigneeUbe Industries, Ltd.
InventorsRyozo Kitoh, Yoshiaki Fujiyama, Takaki Ono, Atsunori Takasugi, Shotaro Hayashi
Estimating the term…
A dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators in stages, the resonator being filled with a dielectric material between its inner and outer conductors, comprising at least one stage in which the outer conductor of the .lambda./4 coaxial dielectric resonator is grounded via a capacitance or inductance. The dielectric filter is embodied as a low-pass filter, high-pass filter or a band-pass filter. As a result, by utilizing dielectric resonators having a desired resonant frequency, it is possible to readily achieve a dielectric filter having an attenuating pole in the neighborhood of the frequency passband and small in insertion loss.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between said inner and outer conductors, the inner and outer conductors being short-circuited at one end surface of each resonator, wherein the resonators are connected in series so that the inner conductor at said one end surface of one of two neighboring resonators is electrically connected to the inner conductor at the other end surface of the other resonator, and the outer conductor of each resonator is grounded via a respective capacitor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the other conductor of the first capacitor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via a respective second capacitor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the other end of the first inductor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via a respective second inductor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between said inner and outer conductors, the inner and outer conductors being short-circuited at one end surface of each resonator, wherein the resonators are connected in series so that the inner conductor at said one end surface of one of two neighboring resonators is electrically connected to the inner conductor at the other end surface of the other resonator, and the outer conductor of each resonator is grounded via a respective inductor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via the same second capacitor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that, in one connection of the neighboring units, the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other neighboring unit, whereas, in the other connection, the other conductor of the first capacitor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator in the neighboring units in relation to said one connection is grounded via the same second capacitor and the outer conductor of each resonator in the unit out of relation to said one connection is grounded via a respective second capacitor.
Dielectric filter having at least three .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein at least three units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that in at least one connection of the neighboring units, the other conductor of the first capacitor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via a respective second capacitor.
Dielectric filter having at least three .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein at least three units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that, in at least one connection of the neighboring units, the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator in the neighboring units in relation to said at least one connection is grounded via the same second capacitor and the outer conductor of each resonator in the unit out of relation to said at least one connection is grounded via a respective second capacitor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via the same second inductor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that, in one connection of the neighboring units, the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other neighboring unit, whereas, in the other connection, the other end of the first inductor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator in the neighboring units in relation to said one connection is grounded via the same second inductor and the outer conductor of each resonator in the units out of relation to said one connection is grounded via a respective second inductor.
Dielectric filter having at least three .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein at least three units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that, in at least one connection of the neighboring units, the other end of the first inductor of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator is grounded via a respective second inductor.
Dielectric filter having at least three .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein at least three units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that, in at least one connection of the neighboring units, the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, and the outer conductor of each resonator in the neighboring units in relation to said at least one connection is grounded via the same second inductor and the outer conductor of each resonator in the unit out of relation to said at least one connection is grounded via a respective second inductor.
Dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first capacitor, one of two conductors of the first capacitor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the outer unit, the outer conductor of each resonator is grounded via a respective second capacitor, at least one additional unit is interposed between two neighboring units, said additional unit comprising at least two third capacitors connected in series, a connecting portion between two neighboring third capacitors is grounded via an additional .lambda./4 coaxial dielectric resonator, the additional dielectric resonator being filled with a dielectric material between its inner and outer conductors which are short-circuited at one end surface of the additional dielectric resonator, so that the connecting portion between two neighboring third capacitors is electrically connected to the inner conductor at the other end surface of the additional dielectric resonator and the outer conductor of the additional dielectric resonator is directly grounded.
Dielectric filter having plurality of .lambda./4 coaxial dielectric resonators, each resonator having inner and outer conductors and being filled with a dielectric material between its inner and outer conductors, said inner and outer conductors being short-circuited at one end surface of each resonator, wherein a plurality of units are used, each unit comprising the resonator and a first inductor, one end of the first inductor being electrically connected to the inner conductor at the other end surface of the resonator, said units being connected in series so that two neighboring units are electrically connected to each other in such a manner that the inner conductor at said one end surface of the resonator of one of two neighboring units is electrically connected to the inner conductor at said one end surface of the resonator of the other unit, the outer conductor of each resonator is grounded via a respective second inductor, at least one additional unit is interposed between two neighboring units, said additional unit comprising at least two third inductors connected in series, a connecting portion between two neighboring third inductors is grounded via an additional .lambda./4 coaxial dielectric resonator, the additional dielectric resonator being filled with a dielectric material between its inner and outer conductors which are short-circuited at one end surface of the additional dielectric resonator, so that the connecting portion between two neighboring third inductors is electrically connected to the inner conductor at the other end surface of the additional dielectric resonator and the outer conductor of the additional dielectric resonator is directly grounded.
Dependencies are inferred from the claim text.