CN107768783B

CN107768783B - Square annular filter

Info

Publication number: CN107768783B
Application number: CN201710975179.6A
Authority: CN
Inventors: 朱巧芬; 刘秀红; 王华英; 韩海燕; 郎利影; 王雪光
Original assignee: Hebei University of Engineering
Current assignee: Hebei University of Engineering
Priority date: 2017-10-19
Filing date: 2017-10-19
Publication date: 2020-09-11
Anticipated expiration: 2037-10-19
Also published as: CN107768783A

Abstract

The invention discloses a square ring filter which comprises an upper component, a middle component, a lower component, an input port, an output port, a waveguide and a metal film, wherein the output port comprises a first output port, a second output port and a third output port, the waveguide comprises a first waveguide, a second waveguide, a third waveguide, a fourth waveguide, a fifth waveguide and a sixth waveguide, the metal film comprises a first metal film and a second metal film, the input port and the first output port are positioned between the upper component and the middle component, the first metal film is positioned between the first waveguide and the second waveguide, a barrier is arranged in the second waveguide, the second output port and the third output port are positioned between the lower component and the middle component, and the second metal film is arranged between the fifth waveguide and the fourth waveguide. The device enables light to be emitted from different output ports by arranging the barriers in the waveguide, can control the ratio of light intensity at different output ports, analyzes the energy of three output ports, and achieves the functions of filtering and beam splitting.

Description

Square annular filter

Technical Field

The invention relates to a filter, in particular to a square ring filter.

Background

Electronic technology is the science of designing and manufacturing circuits with certain specific functions by using electronic devices according to the principle of electronics to solve practical problems, and comprises two major branches of information electronic technology and power electronic technology. Information electronics technology includes Analog electronics technology and Digital electronics technology. The electronic technology is a technology for processing electronic signals, and the processing mode mainly comprises the following steps: signal generation, amplification, filtering and conversion. The information of electronic technology needs to be spread, namely, the transmission of waveform signals, and the signals can be distorted in each link of generation, conversion and transmission due to the environment and the existence of interference, sometimes, even in quite many cases, the distortion is serious, so that the signals and the information carried by the signals are buried in noise deeply, and people have to filter the signals. People mainly adopt a filter to filter signals, and the filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.

The square ring filter is a commonly used filter, and currently, the research on the square ring filter mainly has three ports, namely one input port and two output ports, but the existing filter cannot adjust the light intensity ratio of the output ports, which brings inconvenience to people.

Disclosure of Invention

The present invention is directed to a square loop filter to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a square ring filter comprises an upper component, a middle component, a lower component, an input port, an output port, a waveguide and a metal film, wherein the output port comprises a first output port, a second output port and a third output port, the waveguide comprises a first waveguide, a second waveguide, a third waveguide, a fourth waveguide, a fifth waveguide and a sixth waveguide, the metal film comprises a first metal film and a second metal film, the input port and the first output port are positioned between the upper component and the middle component, the input port and the first output port are positioned in two opposite directions, the input port is communicated with the first output port through the first waveguide, the first metal film is positioned between the first waveguide and the second waveguide, a barrier is arranged in the second waveguide, two sides of the second waveguide are respectively communicated with the upper part of the third waveguide and the upper part of the sixth waveguide, the lower part of the third waveguide and the lower part of the sixth waveguide are both communicated with the upper part of the fourth waveguide, the second output port and the third output port are located between the lower component and the middle component, the second output port and the third output port are located in two opposite directions, the second output port is communicated with the third output port through a fifth waveguide, a second metal film is arranged between the fifth waveguide and the fourth waveguide, and the first metal film, the second waveguide, the third waveguide, the fourth waveguide and the sixth waveguide are located in the middle component.

As a further scheme of the invention: the first waveguide, the second waveguide, the third waveguide, the fourth waveguide, the fifth waveguide and the sixth waveguide are all hollow metal tubes, and the obstacles are made of metal materials.

As a further scheme of the invention: the left side of the middle part is also provided with a protruding part made of metal material.

Compared with the prior art, the invention has the beneficial effects that: the device has reasonable design and simple structure, can enable light to be emitted from different output ports by arranging the barriers in the waveguide, can control the ratio of light intensity at different output ports, and can analyze the energy of the three output ports, thereby realizing the functions of filtering and beam splitting; the device is also provided with a protruding part which can prevent the electromagnetic waves of the input port and the second output port from being coupled and enhance the working accuracy of the device.

Drawings

Fig. 1 is a schematic structural diagram of a square loop filter.

FIG. 2 shows L in a square loop filter₄294nm, and 711.1nm as the wavelength of incident light.

FIG. 3 shows L in a square loop filter₄Field intensity profile at 438nm, wavelength of incident light 897.5 nm.

FIG. 4 shows L in a square loop filter₄Field intensity profile at 558nm and at 1098nm wavelength of incident light.

FIG. 5 shows L in a square loop filter₄Field intensity profile at 438nm, wavelength of incident light 680.4 nm.

FIG. 6 shows L in a square loop filter₄Field intensity profile at 438nm, wavelength of incident light 975.3 nm.

FIG. 7 shows L in a square loop filter₄Field intensity distribution plot at 526nm for an incident light wavelength of 1013 nm.

FIG. 8 shows L in a square loop filter₄Field intensity distribution plot at 502nm and at 810.7nm for the wavelength of the incident light.

FIG. 9 shows L in a square loop filter₄Field intensity profile at 438nm, wavelength of incident light 618.9 nm.

Wherein: 1-input port, 2-first output port, 3-second output port, 4-third output port, 5-first waveguide, 6-second waveguide, 7-third waveguide, 8-fourth waveguide, 9-fifth waveguide, 10-sixth waveguide, 11-first metal film, 12-second metal film, 13-obstacle, 14-protrusion.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 9, a square ring filter includes an upper part, a middle part, a lower part, an input port 1, an output port, a waveguide and a metal film, the output port includes a first output port 2, a second output port 3 and a third output port 4, the waveguide includes a first waveguide 5, a second waveguide 6, a third waveguide 7, a fourth waveguide 8, a fifth waveguide 9 and a sixth waveguide 10, the metal film includes a first metal film 11 and a second metal film 12, the input port 1 and the first output port 2 are located between the upper part and the middle part and the input port 1 and the first output port 2 are located in two opposite directions, the input port 1 is communicated with the first output port 2 through the first waveguide 5, the first metal film 11 is located between the first waveguide 5 and the second waveguide 6 and an obstacle 13 is disposed in the second waveguide 6, two sides of the second waveguide 6 are respectively communicated with an upper part of the third waveguide 7 and an upper part of the sixth waveguide 10, the lower part of the third waveguide 7 and the lower part of the sixth waveguide 10 are both communicated with the upper part of the fourth waveguide 8, the second output port 3 and the third output port 4 are positioned between the lower part and the middle part and the second output port 3 and the third output port 4 are positioned in two opposite directions, the second output port 3 is communicated with the third output port 4 through the fifth waveguide 9, the second metal film 12 is arranged between the fifth waveguide 9 and the fourth waveguide 8, and the first metal film 11, the second metal film 12, the second waveguide 6, the third waveguide 7, the fourth waveguide 8 and the sixth waveguide 10 are all positioned in the middle part. The first waveguide 5, the second waveguide 6, the third waveguide 7, the fourth waveguide 8, the fifth waveguide 9 and the sixth waveguide 10 are all hollow metal tubes, and the barrier 13 is made of metal materials. The left side of the middle part is also provided with a protrusion 14 made of a metal material.

The working principle of the invention is as follows: the waveguide being a type for confiningOr a structure for guiding electromagnetic waves. The first waveguide 5, the second waveguide 6, the third waveguide 7, the fourth waveguide 8, the fifth waveguide 9 and the sixth waveguide 10 are all in a symmetrical structure, and the widths of the first waveguide 5, the second waveguide 6, the third waveguide 7, the fourth waveguide 8, the fifth waveguide 9 and the sixth waveguide 10 are all W. The first waveguide 5 and the fifth waveguide 9 are both L in length₁The second waveguide 6 and the fourth waveguide 8 have a length L₂The third waveguide 7 and the sixth waveguide 10 have a length L₃The thicknesses of the first metal film 11 and the second metal film 12 are both D, the width of the obstacle 13 is T, and the distance from the obstacle 13 to the input port 1 is L₄. The protruding part 14 on the middle component can prevent the electromagnetic waves of the input port 1 and the second output port 3 from being coupled, and the accuracy is improved.

W has a width of 24nm, D has a thickness of 12nm, L₁Has a length of 1000nm, L₂Has a length of 500nm, L₃Has a length of 452nm, by L₄The length of the three output ports can enable light to be emitted from different output ports, the ratio of light intensity at different output ports can be controlled, and the energy of the three output ports can be analyzed, so that the functions of filtering and beam splitting are realized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A square ring filter is characterized by comprising an upper component, a middle component, a lower component, an input port, an output port, a waveguide and a metal film, wherein the output port comprises a first output port, a second output port and a third output port, the waveguide comprises a first waveguide, a second waveguide, a third waveguide, a fourth waveguide, a fifth waveguide and a sixth waveguide, the metal film comprises a first metal film and a second metal film, the input port and the first output port are positioned between the upper component and the middle component, the input port and the first output port are positioned in two opposite directions, the input port is communicated with the first output port through the first waveguide, the first metal film is positioned between the first waveguide and the second waveguide, an obstacle is arranged in the second waveguide, two sides of the second waveguide are respectively communicated with the upper part of the third waveguide and the upper part of the sixth waveguide, the lower part of the third waveguide and the lower part of the sixth waveguide are both communicated with the upper part of the fourth waveguide, the second output port and the third output port are positioned between the lower part and the middle part, the second output port and the third output port are positioned in two opposite directions, the second output port is communicated with the third output port through a fifth waveguide, a second metal film is arranged between the fifth waveguide and the fourth waveguide, the first metal film, the second waveguide, the third waveguide, the fourth waveguide and the sixth waveguide are all positioned in the middle part, and a protruding part made of a metal material is further arranged on the left side of the middle part; the first waveguide, the second waveguide, the third waveguide, the fourth waveguide, the fifth waveguide and the sixth waveguide are all hollow metal tubes, and the barrier is made of metal materials; the distance from the obstacle to the input port is L4, and the length of the L4 is changed, so that the ratio of the light intensity at different output ports is controlled.