CN104638339A - Cavity magic T structure with filtering function - Google Patents
Cavity magic T structure with filtering function Download PDFInfo
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- CN104638339A CN104638339A CN201510089255.4A CN201510089255A CN104638339A CN 104638339 A CN104638339 A CN 104638339A CN 201510089255 A CN201510089255 A CN 201510089255A CN 104638339 A CN104638339 A CN 104638339A
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Abstract
The invention discloses a cavity magic T structure with a filtering function. The cavity magic T structure comprises a medium substrate, an upper metal layer and a lower metal layer, wherein the upper metal layer and the lower metal layer are respectively arranged at the upper surface and the lower surface of the medium substrate; a plurality of metallic through holes are formed in the medium substrate; a first circular resonance cavity, a second circular resonance cavity and a third circular resonance cavity are formed by the upper metal layer, the lower metal layer and the metallic through holes in the circumferences of three preset circles in a surround way; the first circular resonance cavity is respectively coupled and cascaded with the second circular resonance cavity and the third circular resonance cavity, and the upper surface of the medium substrate is provided with a second input feeding structure, a third input feeding structure and two first output feeding structures. The cavity magic T structure has the advantage that by adopting the three circular resonance cavities, the two orthogonal modes of the circular resonance cavities are utilized, so the same-direction output and opposite-direction output functions of the magic T structure are completed in the single-layer medium substrate technology, and the inhibition and filtering functions on the microwaves outside the working frequency band can be realized.
Description
Technical field
The present invention relates to microwave technical field, be specifically related to a kind of cavity evil spirit T structure with filter function.
Background technology
Along with the development of communication system, multifunction device such as filter antenna, filtering Ba Lun, filtering power splitter etc. continue to bring out.The magic T structure with filter function not only can use as traditional power combing, distributor, suppression and filter action can also be played to the microwave be in beyond working frequency range by magic T structure, thus without the need to designing magic T and filter respectively and cascade, thus the size reducing system, the efficiency that reduces junction loss between device, improve system.
The design of the current cavity evil spirit T structure to having filter function both at home and abroad mainly utilizes multi-layer sheet technique (multilayer board or LTCC technique) to realize, and design is complicated, processing cost is very high.
Therefore, prior art existing defects, needs improvement badly.
Summary of the invention
Main purpose of the present invention is the defect for prior art, provides a kind of cavity evil spirit T structure with filter function.
The technological means that technical solution problem of the present invention adopts is: provide a kind of cavity evil spirit T structure with filter function, comprise medium substrate and be arranged at upper metal level and the lower metal layer of described medium substrate upper surface and lower surface respectively; Described medium substrate is provided with multiple plated-through hole; The plurality of plated-through hole is preset circle, second along first respectively and is preset the circle distribution that circle and the 3rd presets circle, surrounds the first circular resonant chamber, the second circular resonant chamber and the 3rd circular resonant chamber to make metal level on this, lower metal layer and these three the plated-through hole correspondences circumferentially presetting circle; Described first circular resonant chamber respectively with described second circular resonant chamber and described 3rd circular resonant chamber coupled cascade, the upper surface of described medium substrate is provided with for the second input feed structure for described second circular resonant chamber feed, for for the 3rd input feed structure of described 3rd circular resonant chamber feed and two are for exporting the first output feed structure of the signal in described first circular resonant chamber.
Have in the cavity evil spirit T structure of filter function provided by the invention, this the first circular resonant chamber and this second circular resonant chamber are by being arranged at the first coupling opening coupled cascade therebetween, and this first circular resonant chamber and the 3rd circular resonant chamber are by being arranged at the second coupling opening coupled cascade therebetween.
Have in the cavity evil spirit T structure of filter function provided by the invention, this first default round circle and the 3rd of presetting with second is respectively preset round tangent, and the described first default circle and described second is preset round circle center line connecting and preset round circle center line connecting perpendicular to the described first default circle with the described 3rd.
In the cavity evil spirit T structure with filter function provided by the invention, described first export feed structure comprise stretch into first in described first circular resonant chamber altogether coplanar waveguide structure and with described first the first microstrip line of being connected of coplanar waveguide structure altogether; Described second input feed structure comprise stretch into second in described second circular resonant chamber altogether coplanar waveguide structure and with described second the second microstrip line of being connected of coplanar waveguide structure altogether; Described 3rd input feed structure comprise stretch into the 3rd in described 3rd circular resonant chamber altogether coplanar waveguide structure and with the described 3rd the 3rd microstrip line that be connected of coplanar waveguide structure altogether.
Have in the cavity evil spirit T structure of filter function provided by the invention, described first presets circle center line connecting that is round and the described second default circle overlaps with the symmetry axis of described first coupling opening, and described first presets circle and the described 3rd default round circle center line connecting and the described 3rd circle center line connecting presetting circle overlaps.
Have in the cavity evil spirit T structure of filter function provided by the invention, these two first export feed structure and preset about described first the circle center line connecting axial symmetry that circle and the described 3rd presets circle.
In the cavity evil spirit T structure with filter function provided by the invention, described first the symmetry axis and described first of the radial direction along described first circular resonant chamber of coplanar waveguide structure presets circle with the described 3rd angle presetting round circle center line connecting altogether is 45 degree.
The cavity evil spirit T structure with filter function with low axial ratio that implementing tool of the present invention provides has following beneficial effect:
Owing to present invention employs three circular resonant chambeies, utilize two patterns orthogonal in circular resonant chamber, make not only to complete in single-layer medium plate technique output in the same way and reverse output function that magic T structure should possess, can also play suppression and filter action to the microwave be in beyond working frequency range, and the amplitude of two output ports and phase place has stronger consistency.
Accompanying drawing explanation
Fig. 1 is the end view with the circular polarization cavity-backed radiator antenna of low axial ratio in one embodiment of the present invention;
Fig. 2 be embodiment illustrated in fig. 1 in the structural representation with the cavity evil spirit T structure of filter function;
Fig. 3 be embodiment illustrated in fig. 1 in the plan structure schematic diagram with the cavity evil spirit T structure of filter function;
Fig. 4 be embodiment illustrated in fig. 1 in using the 3rd input feed structure as return loss during input and loss simulation result figure;
Fig. 5 be embodiment illustrated in fig. 1 in using second input feed structure as return loss during input and loss simulation result figure;
Fig. 6 is the middle phase place difference plot being exported feed structure respectively by the 3rd input feed structure and the second input feed structure as two during input first embodiment illustrated in fig. 1;
Fig. 7 is the middle amplitude difference plot being exported feed structure respectively by the 3rd input feed structure and the second input feed structure as two during input first embodiment illustrated in fig. 1;
Fig. 8 be embodiment illustrated in fig. 1 in the 3rd input feed structure and second input feed structure isolation simulation result figure.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.First-selected embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, the object of these embodiments is provided to be make to disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
The invention provides a kind of circular polarization cavity-backed radiator antenna with low axial ratio.
Simultaneously with reference to shown in Fig. 1, Fig. 2 and Fig. 3, upper metal level 2 and lower metal layer 3 that this cavity evil spirit T structure with filter function comprises medium substrate 1 and is arranged at medium substrate 1 upper surface and lower surface respectively; Medium substrate 1 is provided with multiple plated-through hole 4.In the present embodiment, the thickness of this medium substrate 1 is being 0.508mm, and medium substrate 1 material is Rogers 5880, and the diameter of plated-through hole 4 is 0.6mm.
Wherein, the plurality of plated-through hole 4 arranges formation three circles.Particularly, the plurality of plated-through hole 4 is preset circle, second along first respectively and is preset the circle distribution that circle and the 3rd presets circle, surrounds the first identical circular resonant chamber 6, circular resonant chamber 5, second of size and the 3rd circular resonant chamber 7 to make metal level 2 on this, lower metal layer 3 and these three plated-through hole 4 correspondences circumferentially presetting circle.First circular resonant 5 chamber respectively with the second circular resonant chamber 6 and the 3rd circular resonant chamber 7 coupled cascade, the upper surface of medium substrate 1 is provided with for the second input feed structure for the second circular resonant chamber 6 feed, for first exporting feed structure for the 3rd input feed structure of the 3rd circular resonant chamber 7 feed and two for what export signal in the first circular resonant chamber 5.Be somebody's turn to do particularly, in the present embodiment, the diameter in the first circular resonant chamber 6, circular resonant chamber 5, second and the 3rd circular resonant chamber 7 is 27.44mm.
Wherein, this first export feed structure comprise stretch into first in the first circular resonant chamber 5 altogether coplanar waveguide structure 11 and with first the first microstrip line 10 of being connected of coplanar waveguide structure 11 altogether.Second input feed structure comprise stretch into second in the second circular resonant chamber 6 altogether coplanar waveguide structure 8 and with second the second microstrip line 9 of being connected of coplanar waveguide structure 8 altogether; 3rd input feed structure comprise stretch into the 3rd in the 3rd circular resonant chamber 7 altogether coplanar waveguide structure 12 and with the 3rd the 3rd microstrip line 13 that be connected of coplanar waveguide structure 12 altogether.In the present embodiment, the intermetallic metal strip width of the second coplanar wave guide transmission structure 8 and the 3rd coplanar waveguide structure 12 altogether altogether is 1.55mm, and the gap width of both sides is 0.4mm, and length is 2.4mm; First co-planar waveguide passes the intermetallic metal strip width of structure 11 altogether is 1.55mm for this, and the gap width of both sides is 0.4mm, and length is 2.2mm.
Particularly, this first circular resonant chamber 5 is with this second circular resonant chamber 6 by being arranged at the first coupling opening 16 coupled cascade therebetween, and this first circular resonant chamber 5 and the 3rd circular resonant chamber 7 are by being arranged at the second coupling opening 15 coupled cascade therebetween.In the present embodiment, the width of the first coupling opening 16 and the second coupling opening 15 is 4.76mm.
Further, this first default circle is preset circle and the 3rd respectively and is preset round tangent with second, can save the area of medium substrate 1 like this.In addition, the first circle center line connecting L1 presetting circle and the second default circle presets the circle center line connecting L2 of circle and the 3rd default circle perpendicular to first.Further, this first is preset circle and second and presets the circle center line connecting L1 of circle through the center line of this first coupling opening 16, and this first is preset circle and second preset round circle center line connecting L1 with this and overlap with the symmetry axis of this second feed structure.This first default circle and the circle center line connecting L2 of the 3rd default circle pass the center line of this second coupling opening 15, and this first circle center line connecting L2 presetting circle and the 3rd default circle overlaps with the symmetry axis of the 3rd feed structure.These two first export feed structure and are symmetrical arranged about this first circle center line connecting L2 presetting circle and the 3rd default circle, further, the symmetry axis L3 and first of this first radial direction along the first circular resonant chamber 5 of coplanar waveguide structure 11 altogether presets circle and second to preset the angle of circle center line connecting L2 justified is 45 degree.The symmetry axis of indication is all circular resonant chamber radially-arranged along correspondence in the present invention.
Understandably, each dimensional parameters above is a kind of optimum organization in the present embodiment, but this can not become restriction scope foundation, and each dimensional parameters correspondingly can be arranged according to actual conditions.In addition, mentioned each " default circle " is all coplanar with upper metal level 2 in the present invention, and the axial line of each plated-through hole 4 is all through corresponding " presetting circle ".
Fig. 4 and Fig. 5 be respectively the cavity evil spirit T structure with filter function by the 3rd input feed structure as input and the second input feed structure the simulation results as loss during input and return loss performance, show that cavity evil spirit T structure that this has filter function can be carried out power division and have the effect of filtering in the working band that centre frequency is 9GHz.
Fig. 6 and Fig. 7 be respectively the cavity evil spirit T structure with filter function the 3rd input feed structure as input and the second input feed structure as the phase place of two input structures during input and amplitude difference, result shows: when the 3rd input feed structure is as input, two the 3rd phase differences exported between feed structure are almost 0, and amplitude difference is also almost 0; When the second input feed structure is as input, two the 3rd phase differences exported between feed structure are almost 180, and amplitude difference is almost 0.Above result shows, this cavity evil spirit T structure with filter function has very excellent performance in working band.
Fig. 8 is the simulation result of isolation between magic T two input ports, this result shows, this cavity evil spirit T structure with filter function can ensure to have between two input feed structures the isolation performance of more than 30dB in working band, can meet the demand of most systems.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. there is a cavity evil spirit T structure for filter function, it is characterized in that, comprise medium substrate and be arranged at upper metal level and the lower metal layer of described medium substrate upper surface and lower surface respectively; Described medium substrate is provided with multiple plated-through hole; The plurality of plated-through hole is preset circle, second along first respectively and is preset the circle distribution that circle and the 3rd presets circle, surrounds the first circular resonant chamber, the second circular resonant chamber and the 3rd circular resonant chamber to make metal level on this, lower metal layer and these three the plated-through hole correspondences circumferentially presetting circle; Described first circular resonant chamber respectively with described second circular resonant chamber and described 3rd circular resonant chamber coupled cascade, the upper surface of described medium substrate is provided with for the second input feed structure for described second circular resonant chamber feed, for for the 3rd input feed structure of described 3rd circular resonant chamber feed and two are for exporting the first output feed structure of the signal in described first circular resonant chamber.
2. the cavity evil spirit T structure with filter function according to claim 1, it is characterized in that, this the first circular resonant chamber and this second circular resonant chamber are by being arranged at the first coupling opening coupled cascade therebetween, and this first circular resonant chamber and the 3rd circular resonant chamber are by being arranged at the second coupling opening coupled cascade therebetween.
3. the cavity evil spirit T structure with filter function according to claim 2, it is characterized in that, this first default round circle and the 3rd of presetting with second is respectively preset round tangent, and the described first default circle and described second is preset round circle center line connecting and preset round circle center line connecting perpendicular to the described first default circle with the described 3rd.
4. the cavity evil spirit T structure with filter function according to claim 3, it is characterized in that, described first export feed structure comprise stretch into first in described first circular resonant chamber altogether coplanar waveguide structure and with described first the first microstrip line of being connected of coplanar waveguide structure altogether; Described second input feed structure comprise stretch into second in described second circular resonant chamber altogether coplanar waveguide structure and with described second the second microstrip line of being connected of coplanar waveguide structure altogether; Described 3rd input feed structure comprise stretch into the 3rd in described 3rd circular resonant chamber altogether coplanar waveguide structure and with the described 3rd the 3rd microstrip line that be connected of coplanar waveguide structure altogether.
5. the cavity evil spirit T structure with filter function according to claim 4, it is characterized in that, described first presets circle center line connecting that is round and the described second default circle overlaps with the symmetry axis of described first coupling opening, and described first presets circle and the described 3rd default round circle center line connecting and the described 3rd circle center line connecting presetting circle overlaps.
6. the cavity evil spirit T structure with filter function according to claim 5, is characterized in that, these two first export feed structure and preset about described first the circle center line connecting axial symmetry that circle and the described 3rd presets circle.
7. the cavity evil spirit T structure with filter function according to claim 6, it is characterized in that, described first the symmetry axis and described first of the radial direction along described first circular resonant chamber of coplanar waveguide structure presets circle with the described 3rd angle of circle center line connecting presetting circle altogether is 45 degree.
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| CN201510089255.4A CN104638339B (en) | 2015-02-27 | 2015-02-27 | Cavity evil spirit T structures with filter function |
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| CN201510089255.4A CN104638339B (en) | 2015-02-27 | 2015-02-27 | Cavity evil spirit T structures with filter function |
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| CN104638339A true CN104638339A (en) | 2015-05-20 |
| CN104638339B CN104638339B (en) | 2018-04-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711568A (en) * | 2016-11-24 | 2017-05-24 | 南京邮电大学 | Planar magic T based on substrate integration technology |
| CN109599643A (en) * | 2018-11-29 | 2019-04-09 | 北京无线电测量研究所 | A kind of X-band polarization microwave front-end component |
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| CN101217208A (en) * | 2008-01-11 | 2008-07-09 | 东南大学 | A dual-mode circular high order cavity filter of substrate integration waveguide |
| JP2010021639A (en) * | 2008-07-08 | 2010-01-28 | Fujitsu Ltd | Filter |
| CN102509837A (en) * | 2011-10-25 | 2012-06-20 | 电子科技大学 | Small-sized substrate integrated waveguide band-pass hybrid ring |
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2015
- 2015-02-27 CN CN201510089255.4A patent/CN104638339B/en active Active
Patent Citations (3)
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| CN101217208A (en) * | 2008-01-11 | 2008-07-09 | 东南大学 | A dual-mode circular high order cavity filter of substrate integration waveguide |
| JP2010021639A (en) * | 2008-07-08 | 2010-01-28 | Fujitsu Ltd | Filter |
| CN102509837A (en) * | 2011-10-25 | 2012-06-20 | 电子科技大学 | Small-sized substrate integrated waveguide band-pass hybrid ring |
Non-Patent Citations (1)
| Title |
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| WENJIE FENG: "Compact Planar Magic-T Using E-Plane Substrate Integrated Waveguide (SIW) Power Divider and Slotline Transition", 《IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711568A (en) * | 2016-11-24 | 2017-05-24 | 南京邮电大学 | Planar magic T based on substrate integration technology |
| CN109599643A (en) * | 2018-11-29 | 2019-04-09 | 北京无线电测量研究所 | A kind of X-band polarization microwave front-end component |
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| CN104638339B (en) | 2018-04-13 |
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Effective date of registration: 20210520 Address after: 226000 11 / F, building 4, 58 Chongchuan Road, Chongchuan District, Nantong City, Jiangsu Province Patentee after: NANTONG RESEARCH INSTITUTE FOR ADVANCED COMMUNICATION TECHNOLOGIES Co.,Ltd. Address before: 226019 Jiangsu city of Nantong province sik Road No. 9 Institute of electronic and Information Engineering Nantong University Patentee before: NANTONG University |