CN103326090B - Tee joint band high-temperature superconducting filter - Google Patents
Tee joint band high-temperature superconducting filter Download PDFInfo
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- CN103326090B CN103326090B CN201310191842.5A CN201310191842A CN103326090B CN 103326090 B CN103326090 B CN 103326090B CN 201310191842 A CN201310191842 A CN 201310191842A CN 103326090 B CN103326090 B CN 103326090B
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Abstract
The invention discloses a tee joint band high-temperature superconducting filter which is characterized by comprising two multi-branch-knot loading resonators, an incoming feeder and an output feeder. The first multi-branch-knot loading resonator (4) and the second multi-branch-knot loading resonator (5) are arranged face to face in a central symmetry mode. A distance exists between the two multi-branch-knot loading resonators. The output feeder (7) and the first multi-branch-knot loading resonator (4) form a feed structure of a gap coupler, and the incoming feeder (6) and the second multi-branch-knot loading resonator (5) form a feed structure of the gap coupler. According to the band high-temperature superconductivity filter, the three-frequency-band band-pass filtering function can be achieved, the requirement of the system for filtering on three frequency band signals which are not adjacent is met, control of the bandwidth of the filter can be achieved, an extra transmission zero can be led to a stop band of the filter, and the characteristics of the stop band of the filter are effectively improved. The tee joint band high-temperature superconductivity filter is compact in structure, small in size, flexible in design, easy to integrate, suitable for manufacturing high-temperature superconducting thin films with a high quality factor.
Description
Technical field
The invention belongs to microwave telecommunication devices technical field, relate to a kind of filter.
Background technology
Along with the develop rapidly of modern wireless communication systems, also day by day increase the requirement of comb filter application, the research for comb filter innovative design also just becomes very popular recently.Realizing that multiband shares is an important topic of modern microwave communication system.As the Primary Component of in communication system, the key technology that the multifrequencyization design of microwave filter becomes wherein.Usually, insert the method for a stopband at a broad passband to realize multiband microwave filter, can be realized by a broadband band-pass filter and a narrow-band band-elimination filters in series; Or realized by the method for two different band pass filter parallel connections, in order to realize the impedance matching of input/output terminal, usually need to insert impedance matching network between port and filter.But above-mentioned application is all the method for designing based on one-segment filter, external impedance matching network takies larger circuit area and larger insertion loss by causing simultaneously, increases the complexity of design.For overcoming such deficiency, the normal multimode resonator that adopts designs comb filter.Compound eseparation ring resonator design comb filter can be adopted; In toroidal cavity resonator, apply degenerate mode also can design many passbands band pass filter; Q-RING can also be adopted to load the method for resonator; And Q-RING short circuit minor matters load the method for resonator.Like this, each band connection frequency can be adjusted to desirable value by size by controlling corresponding resonator easily.In addition, apply step impedance resonator and also can build many passbands band pass filter.But the correlation between step impedance resonator resonance frequency adds the complexity of design of filter.High-temperature superconductor multi-pole filter with many band-pass behavior can also be designed with multiple double helix resonator.
High temperature superconductor technology is a high-tech technology of getting up in fast development in recent years, as everyone knows, high-temperature superconductor microwave device has lower loss and better performance than conventional device, the microstrip filter adopting high-temperature superconducting thin film to make has extremely low pass-band loss and high adjacent frequency interference rejection capability, therefore in radio frequency, field of microwave communication, there is boundless application prospect, the designing technique of super conductive filter is also very ripe, and has realized small lot sizable application at moving communicating field.But, build at application high temperature superconducting materia the trial only having minority in many passbands band pass filter up to now.
Summary of the invention
The object of the invention is to design a kind of three passband high temperature superconduction wave filters, the filter characteristic of three passbands can be realized, meet the filtering requirements of system to three non-adjacent frequency band signals, there is structure little, compact conformation, the features such as flexible design, the high-temperature superconducting thin film that applicable use has high quality factor makes.
Technical solutions according to the invention are: in traditional micro-strip resonantor, load multiple open circuit minor matters form multimode resonator, be applicable to design the three-passband filter that simultaneously can carry out filtering to the signal of three frequency ranges, micro-band is bent be beneficial to and realizes miniaturization, adopt the source load coupling structure between disresonance point to introduce extra transmission zero to improve stopband characteristic simultaneously.
Specifically, three passband high temperature superconduction wave filters of the present invention by two racemosus save load resonator, incoming feeder and output feeders three part form.First racemosus joint loads resonator (4) and the second racemosus joint loading resonator (5) adopts face-to-face placement in a center of symmetry, two racemosus joints load between resonator and leave spacing (9), output feeder (7) and the first racemosus save and load the feed structure that resonator (4) forms slot-coupled, and incoming feeder (6) and the second racemosus save and load the feed structure that resonator (5) forms slot-coupled.As described in Figure 4.
Two racemosus joint of the present invention load resonator pattern feature can by change load minor matters (1) size regulate; The spacing (9) that the coupled characteristic of two racemosus joint loading resonators can be loaded between resonator (4) and the second racemosus joint loading resonator (5) by change first racemosus joint regulates; Incoming feeder (6), output feeder (7) save with the first racemosus respectively and load resonator (4), the second racemosus is saved the coupled characteristic loading resonator (5) and can be regulated by the spacing (8) changing input and output feeder line and resonator.
Another technical scheme of the present invention is, on the basis of last technical scheme, resonator (5) side is loaded, between incoming feeder (6) and output feeder (7) in the first racemosus joint loading resonator (4) or the second racemosus joint, add the half-wave resonator (10) of a bending, form one improve high-temperature superconductor three-passband filter, half-wave resonator (10) respectively and incoming feeder (6), output feeder form slot-coupled between (7).As described in Figure 5.Spacing (11) between the half-wave resonator (10) bent respectively by change and incoming feeder (6), the spacing (12) between the half-wave resonator (10) bent and output feeder (7) can regulate source load coupling characteristic, thus introduce the extra transmission zero (18) of as described in Figure 7 two and (19), raising stopband characteristic.
Racemosus joint of the present invention loads resonator, is to form a racemosus joint the upper loading three open circuit minor matters (1) of half-wave resonator (2) to load resonator.As described in Figure 1.
Half-wave resonator of the present invention (2), can be the spiral or sped structure of orthoscopic, hairpin-type, half block hairpin-type, many broken-line types, symmetric double, the physical form of the half-wave resonator of these structures can be identical, also can be different.
The advantage that the present invention is compared with prior art had: the present invention is not increasing under circuit area and processed complex degree prerequisite, adopts the loading of racemosus joint can realize three frequency range band-pass filtering functions, meets the filtering requirements of system to three non-adjacent frequency band signals; Employing gap coupled structure can realize the control to filter bandwidht; Adopt the source load coupling structure of disresonance point can introduce extra transmission zero at the stopband of filter, effectively improve the stopband characteristic of filter; Compact conformation of the present invention, volume is little, flexible design, is easy to integrated, and circuit fabrication is convenient; The high-temperature superconducting thin film that applicable use has high quality factor makes.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation that racemosus joint involved in the present invention loads resonator.Wherein, 1 is the different open circuit minor matters of three sizes loaded, and 2 is an orthoscopic half-wave resonator, 3 for this reason racemosus joint load the plane of symmetry of resonator structure.
Accompanying drawing 2 is the strange mould schematic equivalent circuit that racemosus joint involved in the present invention loads resonator.
Accompanying drawing 3 is the even mould schematic equivalent circuit that racemosus joint involved in the present invention loads resonator.
Accompanying drawing 4 is a kind of three passband high temperature superconduction wave filter schematic diagrames adopting two racemosus joints to load the face-to-face placement formation in a center of symmetry of resonator involved in the present invention, realizes the filtering characteristic of three passbands.4 is that the first racemosus joint loads resonator, 5 is that the second racemosus joint loads resonator, 6 is incoming feeder, 7 is output feeder, 8 save for input and output feeder line and racemosus the slot-coupled spacing loaded between resonator, and 9 is the slot-coupled spacing that the first racemosus joint loads between resonator 4 and the second racemosus joint loading resonator 5.
Accompanying drawing 5 is the schematic diagram of three passband high temperature superconduction wave filters of a kind of improvement involved in the present invention, introduces the source load coupling of disresonance point.4 is that the first racemosus joint loads resonator, 5 is that the second racemosus joint loads resonator, 6 is incoming feeder, 7 is output feeder, 8 save for input and output feeder line and racemosus the slot-coupled spacing loaded between resonator, and 9 is the slot-coupled spacing that the first racemosus joint loads between resonator 4 and the second racemosus joint loading resonator 5, and 10 is the half-wave resonator bent, 11 is the half-wave resonator 10 of bending and the spacing of incoming feeder 6, and 12 is the half-wave resonator 10 of bending and the spacing of output feeder 7.
Accompanying drawing 6 is the frequency response chart of a kind of three passband high temperature superconduction wave filters involved in the present invention.13 be reflex response curve S 11,14 be transmission response curve S 21,15 is first passband, and 16 is second passband, and 17 is the 3rd passband.
Accompanying drawing 7 is the frequency response chart of three passband high temperature superconduction wave filters of a kind of improvement involved in the present invention.18,19 is two transmission zeros that the three passband high temperature superconduction wave filters improved increase newly.
Embodiment
The present invention will be described further by following examples by reference to the accompanying drawings.
As shown in Figure 1, the half-wave resonator prototype that the racemosus joint in filter of the present invention loads, the open circuit minor matters 1 that it loads three different sizes by the half-wave resonator 2 of orthoscopic are formed.This structural advantages is to utilize a resonator to realize multiple pattern, and then realize comb filtering characteristic, compared to traditional employing multiple resonator cascade or insert the method for band stop filter design comb filter to have volume little, compact conformation, the advantages such as flexible design.Meanwhile, symmetrical minor matters load to be convenient to carry out the even and odd mode analysis as Fig. 2 and Fig. 3.
Multiple open circuit minor matters that described racemosus joint loads resonator adopt Central Symmetry mode to load, and be designed to different sizes, in design of filter, in view of the consideration of miniaturization, minor matters of each can being opened a way bend.
Embodiment 1: a kind of three passband high temperature superconduction wave filters.
As shown in Figure 4, first racemosus joint loading resonator 4 as above and the second racemosus joint are loaded resonator 5 adopts face-to-face placement in a center of symmetry to form two primary resonance unit of high-temperature superconductor three-passband filter, incoming feeder 6, output feeder 7 all adopt the weak coupling mode of slot-coupled and racemosus to save to load resonator 4 and 5 and are coupled, be conducive to like this producing transmission zero, improve stopband characteristic.
Fig. 6 is the frequency response chart of a kind of high-temperature superconductor three-passband filter of the racemosus joint loading resonator design making that application the present invention proposes.This resonator can produce three passbands independent of each other, and band internal characteristic is better.
Embodiment 2: a kind of three passband high temperature superconduction wave filters of improvement.
As shown in Figure 5, structure and the embodiment 1 of primary resonance unit and input and output feeder line remain unchanged, but on the filter construction basis of embodiment 1, add the half-wave resonator 10 of a bending, the spacing of it and incoming feeder 6 and output feeder 7 is respectively 11 and 12, the source load coupling structure of this disresonance point introduces two extra transmission zeros, makes the stopband characteristic of filter better compared to embodiment 1.
Fig. 7 is the frequency response chart of three passband high temperature superconduction wave filters of a kind of improvement of the racemosus joint loading resonator design making that application the present invention proposes.Relative to the frequency response of embodiment 1, increase two transmission zeros 18 and 19 in Fig. 7 newly, effectively improve the stopband characteristic of passband two and passband three.
Above-mentioned full-wave electromagnetic field simulation software is Sonnet.Observe described filter by figure and there are good performance index.
Claims (3)
1. three passband high temperature superconduction wave filters, it is characterized in that by two racemosus save load resonator, incoming feeder and output feeders three part form; First racemosus joint loads resonator (4) and the second racemosus joint loading resonator (5) adopts face-to-face placement in a center of symmetry, two racemosus joints load between resonator and leave spacing (9), output feeder (7) and the first racemosus save and load the feed structure that resonator (4) forms slot-coupled, and incoming feeder (6) and the second racemosus save and load the feed structure that resonator (5) forms slot-coupled;
Described racemosus joint loads resonator, is to form the upper loading three open circuit minor matters (1) of half-wave resonator (2);
The half-wave resonator (10) that described three passband high temperature superconduction wave filters also comprise bending is positioned at the first racemosus joint and loads resonator (4) or the second racemosus joint loads resonator (5) side, between incoming feeder (6) and output feeder (7).
2. three passband high temperature superconduction wave filters according to claim 1, it is characterized in that described half-wave resonator (10) respectively and incoming feeder (6), output feeder form slot-coupled between (7).
3. three passband high temperature superconduction wave filters according to claim 1, it is characterized in that described half-wave resonator (2), be the spiral or sped structure of orthoscopic, hairpin-type, half block hairpin-type, many broken-line types, symmetric double, its physical form is identical or not identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191842.5A CN103326090B (en) | 2013-05-22 | 2013-05-22 | Tee joint band high-temperature superconducting filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191842.5A CN103326090B (en) | 2013-05-22 | 2013-05-22 | Tee joint band high-temperature superconducting filter |
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| CN103326090A CN103326090A (en) | 2013-09-25 |
| CN103326090B true CN103326090B (en) | 2015-07-08 |
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| CN103762403B (en) * | 2013-12-31 | 2015-07-15 | 电子科技大学 | Three-passing-band filter |
| CN113224483A (en) * | 2021-03-23 | 2021-08-06 | 中南民族大学 | Three-passband filter based on SLR structure |
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| CN102035057B (en) * | 2010-10-30 | 2013-06-12 | 华南理工大学 | Bandwidth controllable three-frequency micro-strip filter |
| CN102361110B (en) * | 2011-10-08 | 2013-09-04 | 上海大学 | Small-sized double-module double-frequency micro-strip filter |
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