Cavity filter assembly
AssigneeKmw Inc.
InventorsJoung-hoe Kim, Sung Bae Park
Life of this patent
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Abstract
The present disclosure provides a cavity filter assembly installed with an RF filter having an empty area formed between the RF filter and a cavity filter body serving as a ground to reduce the parasitic capacitance by forming the cavity filter body with a first pocket portion configured to install the RF filter and a second pocket portion within the first pocket portion in a position to overlap a transmission line, thereby reducing the insertion loss of the RF filter, which when serving as a low-pass filter, can position the harmonics in the stopband further away from the cutoff frequency and thus effect improved frequency characteristics of the low-pass filter through improvements of, for example, the frequency characteristics in the stopband.
Claims18
A cavity filter assembly, comprising:
- a cavity filter, comprising:
- a hollow container including a first pocket formed on one surface of the cavity filter and a second pocket formed on a first region of a bottom surface of the first pocket;
- and
- one or more resonant rods positioned within the hollow container;
- a radio frequency (RF) filter disposed within the first pocket;
- and
- one or more RF connection members coupled to the RF filter on a second region of the bottom surface of the first pocket,
- wherein the hollow container further comprises:
- at least one through-hole formed in the second region of the bottom surface of the first pocket.
A cavity filter, comprising:
- a container including a first pocket and a second pocket formed under the first pocket in a vertical direction, wherein a cross-sectional area of the first pocket is larger than a cross-sectional area of the second pocket;
- at least one resonant rod disposed in the container;
- and
- a radio frequency (RF) filter disposed in the first pocket,
- wherein the at least one resonant rod is oriented in the vertical direction, and
- wherein the container comprises:
- a through-hole penetrating a bottom surface of the first pocket, wherein the through-hole does not penetrate a bottom surface of the second pocket.
Dependencies are inferred from the claim text.