Ceramic dielectric waveguide filter

A waveguide filter and ceramic dielectric technology, applied in waveguide devices, resonators, electrical components, etc., can solve the problem of poor remote harmonic suppression performance, achieve the effect of improving remote suppression performance and easy processing and molding

Pending Publication Date: 2019-10-25
MOBI TECH SHENZHEN CO LTD +4
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Problems solved by technology

Since the resonant frequency of the high-order mode of the ceramic resonator is closer to the fundamental mode, the ceramic dielectric waveguide filter is often inferior to the traditional metal coaxial cavity filter in the far-end harmonic suppression performance. If an additional cascaded low-pass filter is used to improve Far-end harmonics will sacrifice key indicators such as passband insertion loss and product size

Method used

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a ...

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Abstract

The invention is applicable to the field of filters, and provides a ceramic dielectric waveguide filter. The ceramic dielectric waveguide filter includes at least one ceramic resonator. A first blindhole with an upward opening is arranged downward in the upper surface of the ceramic resonator, and a second blind hole with a downward opening is arranged upward in the lower surface. The first blindhole and the second blind hole are oppositely arranged, and the first blind hole and the second blind hole are both used for frequency tuning. On the premise of keeping the working mode frequency ofthe ceramic resonator unchanged, the frequency of part of adjacent high-order modes can be raised and kept away from the working frequency, so as to improve the far end suppression performance of thefilter. In addition, the depth required for the first blind hole of the ceramic resonator provided by the invention can be reduced the under the same design size and working frequency, so that the ceramic resonator can be machined and formed, electroplated and debugged in the later period more easily.

Description

technical field [0001] The invention belongs to the field of radio frequency and microwave filters in the field of wireless communication, in particular to a ceramic dielectric waveguide filter. Background technique [0002] A ceramic dielectric waveguide filter is a frequency selective device that uses a specific ceramic material as a carrier and consists of multiple ceramic resonators cascaded. With the rapid development of wireless communication technology, the market has increasingly stringent requirements on the performance and volume of communication base station equipment. Ceramic dielectric waveguide filters have broad application prospects in the future due to their compact size and relatively high quality factor. Since the resonant frequency of the high-order mode of the ceramic resonator is closer to the fundamental mode, the ceramic dielectric waveguide filter is often inferior to the traditional metal coaxial cavity filter in the far-end harmonic suppression pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P7/10
CPCH01P1/2002H01P7/10
Inventor 刘磊
Owner MOBI TECH SHENZHEN CO LTD
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