CN204885385U

CN204885385U - Rectangular waveguide wave filter

Info

Publication number: CN204885385U
Application number: CN201520686494.3U
Authority: CN
Inventors: 夏运强
Original assignee: Chengdu University of Information Technology
Current assignee: Chengdu University of Information Technology
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2015-12-16
Anticipated expiration: 2025-09-07

Abstract

The utility model relates to a wave filter. The utility model discloses a rectangular waveguide wave filter through insert the pin in rectangular waveguide wave filter, changes the attenuation characteristic of wave filter, improves the outband decay. The utility model provides a, rectangular waveguide wave filter, including rectangular waveguide, the coupling iris of setting in rectangular waveguide, 2 coupling iriss are a set of to be disposed in pairs, in every group, 2 coupling iris symmetrical arrangement, two lateral walls with rectangular waveguide link to each other respectively, and the coupling iris height equals highly with rectangular waveguide that 2 coupling iris width sums are less than the rectangular waveguide width, the distance is the half -wavelength between every group coupling iris, a serial communication port, the last pin that is provided with of rectangular waveguide, the pin passes the rectangular waveguide roof perpendicularly and inserts in the waveguide. The utility model discloses can insert length among the rectangular waveguide through changing the pin, set up alignment tape such as the position zero point position of attenuateing, very convenient compensation filter attenuation characteristic outward.

Description

Rectangular waveguide filter

Technical field

The utility model relates to filter, particularly a kind of rectangular waveguide filter.

Background technology

Waveguide is a kind of microwave transmission line, is usually made up of copper or aluminium, and its shape and structure all has certain symmetry.Cross section is rectangle, inner regular waveguide of filling uniform dielectric is called rectangular waveguide, as shown in Figure 1.Microwave can enter from one end of waveguide, and export from the other end, corresponding port is called input and output.The long limit a of rectangle is the width of waveguide, and the minor face b of rectangle is the height of waveguide, and they together constitute the main structure parameters of rectangular waveguide.As a=b, just become a kind of special waveguide---square waveguide.The rectangular waveguide that the utility model relates to comprises square waveguide.

Filter is a vitals in Modern Communication System, and the Main Function of filter allows useful signal undampedly by filter, and unwanted signal is maximally decayed by filter.Waveguide filter is a kind of common structure of filter, and have structure simple, function admirable, debugs feature easily, be able to extensive use in a communications system.

Rectangular waveguide filter on the basis of rectangular waveguide 10, increases coupling iris 21 form, as shown in Figures 2 and 3.For 5 rank filters, need to arrange 12 coupling iris 21, these coupling iris 2 one composition is to configuration, often in group, 2 coupling iris balanced configurations, be connected with two sidewalls of rectangular waveguide 10 respectively, coupling iris 21 height is equal with rectangular waveguide height b, 2 coupling iris 21 width sums are less than rectangular waveguide width a, make there is certain distance d between 2 of relative configuration coupling iris 21, often organize spacing distance c=λ/2 between coupling iris 21, λ is wavelength corresponding to the operating frequency of rectangular waveguide filter, as shown in Figure 3.This rectangular waveguide filter volume of prior art is comparatively large, often restricted in actual applications, particularly rectangular waveguide filter operating frequency lower or exponent number is higher time, show more outstanding.

Utility model content

Technical problem to be solved in the utility model, is just to provide a kind of rectangular waveguide filter, by inserting pin in rectangular waveguide filter, changing the attenuation characteristic of filter, improving attenuation outside a channel.

The utility model solve the technical problem, and the technical scheme of employing is, rectangular waveguide filter, comprises rectangular waveguide, the coupling iris be arranged in rectangular waveguide, and described coupling iris 2 composition is to configuration; Often in group, 2 coupling iris balanced configurations, be connected with two sidewalls of rectangular waveguide respectively, coupling iris height is equal with rectangular waveguide height, and 2 coupling iris width sums are less than rectangular waveguide width; The spacing often organizing coupling iris is half-wavelength; It is characterized in that, described rectangular waveguide is provided with pin, described pin passes perpendicularly through rectangular waveguide roof and inserts in waveguide.

Rectangular waveguide filter of the present utility model, increasing attenuation outside a channel zero point by inserting pin in filter, improving the decay of out of band signal.Length, setting position etc. that pin inserts in rectangular waveguide can the outer attenuation zeros position of adjustment belt, very easily adjustment filter attenuation characteristics.

Further, screw thread is provided with between described pin and rectangular waveguide roof.

Between pin and rectangular waveguide roof, screw thread is set, the length that pin inserts waveguide can be adjusted easily, thus change filter transfer characteristic, very practical.

Further, described pin top is provided with swing handle.

The swing handle at pin top has further facilitated the adjustment of pin, because swing handle is in waveguide external, does not affect waveguide characteristic.

Preferably, described pin is positioned on rectangular waveguide axis.

Rectangular waveguide filter has symmetrical structure, and pin is arranged on waveguide axis, can not destroy the symmetry of waveguide, is conducive to ensureing that transmission characteristic is not worsened.

Concrete, described pin is positioned at rectangular waveguide input and/or output.

Rectangular waveguide filter of the present utility model, the pin of increase can be arranged on input, also can be arranged on output, or input and output all arrange pin, introduce zero point outward at the band at filter transfer curve passband two ends, improves fade performance.

The beneficial effects of the utility model are, suitably can reduce the exponent number of filter, and can ensure certain attenuation outside a channel characteristic by inserting pin in waveguide filter, thus reduce filter volume.Also when not increasing filter order and volume, attenuation outside a channel performance can be improved.

Accompanying drawing explanation

Fig. 1 is Rectangular Waveguide Structure schematic diagram;

Fig. 2 is rectangular waveguide filter structural representation;

Fig. 3 is the P-P cutaway view of Fig. 2;

Fig. 4 is example structure schematic diagram;

Fig. 5 is pin and rectangular waveguide configuration relation schematic diagram.

Embodiment

Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.

Embodiment

This routine rectangular waveguide filter structure as shown in Figure 4, comprises rectangular waveguide 10, is arranged on the coupling iris 21 in rectangular waveguide 10 and passes perpendicularly through the pin 20 that rectangular waveguide 10 roof inserts in waveguide and form.Coupling iris 2 one composition is to configuration, and often 2 coupling iris balanced configurations in group, are connected with two sidewalls of rectangular waveguide respectively, and 2 coupling iris 21 width sums are less than rectangular waveguide width a, make to form spacing d between 2 coupling iris 21.Coupling iris 21 height is equal with rectangular waveguide height b, and the spacing c of each group coupling iris is half wavelength lambda/2, and λ is wavelength corresponding to rectangular waveguide filter operating frequency.This routine pin 20 is arranged on the output of rectangular waveguide 10, can introduce zero point in the outside of filter transfer curve, improves the outer attenuation characteristic of filter band.In this example, be provided with screw thread between pin 20 and rectangular waveguide 10 roof, pin 20 top is provided with swing handle 22, by rotating swing handle 22, can adjust the degree of depth that pin 20 inserts rectangular waveguide 10 very easily, thus adjustment filter attenuation characteristic.Pin 20 as shown in Figure 5 can be found out with rectangular waveguide 10 configuration relation schematic diagram, and this routine pin 20 is positioned on rectangular waveguide 10 axis, does not affect the symmetry of filter.

According to different needs, in the utility model, pin 20 also can be arranged on rectangular waveguide 10 input, or arranges 2 pins, lays respectively at input and output.

Claims

1. rectangular waveguide filter, comprises rectangular waveguide, the coupling iris be arranged in rectangular waveguide, and described coupling iris 2 composition is to configuration; Often in group, 2 coupling iris balanced configurations, be connected with two sidewalls of rectangular waveguide respectively, coupling iris height is equal with rectangular waveguide height, and 2 coupling iris width sums are less than rectangular waveguide width; The spacing often organizing coupling iris is half-wavelength; It is characterized in that, described rectangular waveguide is provided with pin, described pin passes perpendicularly through rectangular waveguide roof and inserts in waveguide.

2. rectangular waveguide filter according to claim 1, is characterized in that, is provided with screw thread between described pin and rectangular waveguide roof.

3. rectangular waveguide filter according to claim 2, is characterized in that, described pin top is provided with swing handle.

4. the rectangular waveguide filter according to claim 1,2 or 3, is characterized in that, described pin is positioned on rectangular waveguide axis.

5. rectangular waveguide filter according to claim 4, is characterized in that, described pin is positioned at rectangular waveguide input and/or output.