A filtering unit and filter

A filter unit and filter technology, which is applied to waveguide-type devices, waveguides, resonators, etc., can solve the problems of large area and high filter cost.

Active Publication Date: 2020-01-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this technical solution, the stopband can only be suppressed to 6.52 times of the baseband signal, and the area is relatively large, which will also lead to higher cost of the entire filter

Method used

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  • A filtering unit and filter
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  • A filtering unit and filter

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] like figure 1 , figure 2 and image 3 as shown, figure 1 and image 3 Structural schematic diagrams of two filters provided for the embodiments of the present invention; figure 2 A side view of the filter unit provided by the embodiment of the present invention. Optionally, the filter may be a second-order filter.

[0042] In order to achieve the above effects, an embodiment of the present invention provides a filter unit...

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Abstract

A filtering unit (60), the filtering unit (60) comprising: adopting two slow-wave resonance units (3) to couple with each other, each slow-wave resonance unit (3) using a CPW transmission line (10), a gradient CPW transmission line and (20) It is composed of ground branches (40), which can generate slow-wave characteristics, and push the high-order harmonics of the baseband signal to high frequencies to achieve wide stop-band characteristics; in addition, by using the slow-wave effect, rational design of the filter size can also The overall area of ​​the filter is reduced, the cost is reduced, and the coupling of two slow-wave resonance units (3) can enhance the passband performance of the filter, increase the bandwidth, increase the flatness in the passband and reduce the insertion loss.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a filtering unit and a filter. Background technique [0002] With the development of communication technology, the operating frequency band of the communication system is wider and wider, and the unwanted signals and various noises received by the communication system are also increasing. This makes the modern communication system have a strong suppression of out-of-band signals, and the design is more complicated. A filter with a good out-of-band suppression function can greatly simplify the complexity of the communication system, simplify the design, and reduce the cost. Among the existing wide stopband filters, many designs use the method of adding transmission zeros to suppress the high-order harmonics of the baseband signal, and some filters are generated by SIR (Stepped Impedance Resonator) wide stopband. [0003] One solution in the prior art is to add a s...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01P1/20
CPCH01P1/2013H01P1/2039H01P3/003H01P5/028H01P7/086H01P1/20H01L23/66H01P3/006H01P5/08
Inventor杨秉正钱慧珍罗讯
OwnerHUAWEI TECH CO LTD