CN104638360B - Filter antenna - Google Patents
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- CN104638360B CN104638360B CN201510085440.6A CN201510085440A CN104638360B CN 104638360 B CN104638360 B CN 104638360B CN 201510085440 A CN201510085440 A CN 201510085440A CN 104638360 B CN104638360 B CN 104638360B
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- rectangular cavity
- metal layer
- single mode
- medium substrate
- metal level
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Abstract
The invention provides a kind of filter antenna, including upper medium substrate, bindiny mechanism and the lower medium substrate being cascading；Multiple first plated-through holes are provided with upper medium substrate, multiple second plated-through holes are provided with lower medium substrate, the upper and lower surface of upper medium substrate is respectively arranged with the first metal layer and second metal layer, and the upper surface of lower medium substrate and following table are provided with the 3rd metal level and the 4th metal level；3rd metal level, the 4th metal level and the plurality of second plated-through hole surround double-mold rectangular cavity, the first metal layer, second metal layer and the plurality of first plated-through hole surround single mode rectangular cavity, and bimodulus rectangular cavity passes through coupled cascade with single mode rectangular cavity；Two radiating slots that are parallel to each other are provided with the first metal layer, the midpoint Central Symmetry that two radiating slots project on the first metal layer on single mode rectangular cavity.The present invention has the beneficial effect of high out-of-side rejection and low-cross polarization.
Description
Technical field
The present invention relates to field of microwave communication, more particularly to a kind of filter antenna with high out-of-side rejection function.
Background technology
With the high speed development of wireless communication system, for wireless communication terminal powerful while, size is but increasingly
It is small, therefore as the multifunctional module design of balun wave filter, work(filter-divider, filter antenna etc. is increasingly becoming inexorable trend.
Antenna and wave filter, which are integrated, can effectively reduce the chi of the loss of system, the efficiency for improving system and energy reduction system
It is very little.Filter antenna be using antenna as the afterbody resonator for being considered as wave filter while radiating element again, it is and other
Resonator integrates, the conversion formed between electrical power and radio wave, while the echo of the gain of antenna and input damage
The response of consumption responds similar to the transmission response and return loss of wave filter respectively.
At present, the wave filter and antenna for having had a variety of transmission line structures are applied among the design of filter antenna, but
It is less using the filter antenna of substrate integration wave-guide SIW Technology designs, and outside the filter antenna gain response band designed
Suppress not high.
The content of the invention
For filter antenna of the prior art Out-of-band rejection it is not high the defects of, there is provided one kind there is high out-of-side rejection work(
The filter antenna of energy.
The present invention solves the technological means that technical problem uses：A kind of filter antenna is provided, including is cascading
Upper medium substrate, bindiny mechanism and lower medium substrate；Multiple first plated-through holes are provided with the upper medium substrate,
Multiple second metallization are provided with the lower medium substrate, the upper and lower surface of the upper medium substrate is respectively arranged with
The first metal layer and second metal layer, the upper surface of the lower medium substrate and following table are respectively arranged with the 3rd metal level and the 4th
Metal level；It is humorous that 3rd metal level, the 4th metal level and the plurality of second plated-through hole surround double-mold rectangle
Shake chamber, and the first metal layer, the second metal layer and the plurality of first plated-through hole surround single mode rectangular cavity,
The bimodulus rectangular cavity passes through coupled cascade with the single mode rectangular cavity；Set on the lower surface of the lower medium substrate
It is equipped with a feeding microstrip line for being used to feed to the bimodulus rectangular cavity；
Position on the first metal layer corresponding to the single mode rectangular cavity is provided with two radiation that are parallel to each other
Gap, the middle dot center pair that two radiating slots project on the single mode rectangular cavity on the first metal layer
The the first perpendicular bisector axial symmetry for claiming and being projected on the single mode rectangular cavity on the first metal layer.
In filter antenna provided by the invention, the single mode rectangular cavity and the bimodulus rectangular cavity are locally right
Standard, and the second metal layer corresponding to the part of the alignment and the 3rd metal level respectively on be respectively arranged with size
Identical and facing each other first coupling gap and the second coupling gap are with by the bimodulus rectangular cavity and the single mode
Rectangular cavity coupled cascade.
In filter antenna provided by the invention, the feeding microstrip line is along the bimodulus rectangular cavity described
The perpendicular bisector of projection on four metal levels is set, the feeding microstrip line, the first coupling gap and second coupling
The rectangular strip in gap, the length direction of the feeding microstrip line couple gap on the 4th metal level with described second
The length direction of projection be mutually perpendicular to.
In filter antenna provided by the invention, the midpoint in the second coupling gap exists with the single mode rectangular cavity
The midpoint projected in the second metal layer overlaps, and the length direction in the second coupling gap and first perpendicular bisector
It is parallel.
In filter antenna provided by the invention, the bindiny mechanism is bonding medium.
In filter antenna provided by the invention, the bonding medium is prepreg.
Implement filter antenna provided by the invention to have the advantages that：
(1), the method that the filter antenna is cascaded using bimodulus rectangular cavity and single mode rectangular cavity, makes the present invention only
Can be with three transmission poles of interior acquisition using two resonator cascades；
(2), bimodulus rectangular cavity causes the filter antenna of design less than band connection frequency and height used by the invention
Respectively there is a zero point at band connection frequency, higher Out-of-band rejection performance is obtained, so as to improve the selectivity of passband；
(3) two radiating slots of the invention are symmetrical arranged, and make it have ultralow cross polarization characteristics.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the dimensional structure diagram of the filter antenna in the preferred embodiment of the present invention；
Fig. 2 is the top view of the filter antenna in embodiment illustrated in fig. 1；
Fig. 3 a be on the second roof on the filter antenna in embodiment illustrated in fig. 1 without the line of rabbet joint when CURRENT DISTRIBUTION；
Fig. 3 b are CURRENT DISTRIBUTIONs when having the line of rabbet joint on the second roof on the filter antenna in embodiment illustrated in fig. 1；
Fig. 4 is the antenna pattern of the filter antenna in embodiment illustrated in fig. 1；
Fig. 5 is the gain diagram of the filter antenna in embodiment illustrated in fig. 1 and the S21 comparative bid parameters of wave filter.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
The invention provides a kind of filter antenna.
As shown in Figure 1 and Figure 2, the filter antenna include be cascading upper medium substrate 1, bindiny mechanism 2 with
And lower medium substrate 3, the bindiny mechanism 2 are used to connect medium substrate 1 and lower medium substrate 3；Bindiny mechanism 2 can be viscous
Medium is closed, further, the bonding medium is prepreg.It is to be appreciated that the form not limited to this of the bindiny mechanism 2, also
Other common connected modes can be used.
Specifically, multiple first plated-through holes 8 are provided with upper medium substrate 1, are provided with the lower medium substrate 3
Multiple second plated-through holes 9, the upper and lower surface of the upper medium substrate 1 are respectively arranged with the first metal layer 4 and
Two metal levels 5, the upper surface of the lower medium substrate 3 and following table are respectively arranged with the 3rd metal level 6 and the 4th metal level 7；Institute
State the 3rd metal level 6, the 4th metal level 7 and the plurality of second plated-through hole 9 and surround double-mold rectangular cavity 11,
The first metal layer 4, the second metal layer 5 and the plurality of first plated-through hole 8 surround single mode rectangular cavity 10,
The bimodulus rectangular cavity 11 passes through coupled cascade with the single mode rectangular cavity 10；The following table of the lower medium substrate 3
A feeding microstrip line 12 for being used to feed to the bimodulus rectangular cavity 11 is provided with face；It is right on the first metal layer 4
The position of single mode rectangular cavity 10 described in Ying Yu is provided with two radiating slots 15 that are parallel to each other, and two radiating slots 15 are equal
The midpoint Central Symmetry that is projected on the single mode rectangular cavity 10 on the first metal layer 4 and on the single mode square
The first perpendicular bisector axial symmetry that shape resonator 10 projects on the first metal layer 4.First perpendicular bisector refers to the projection
The perpendicular bisector of a line.The single mode rectangular cavity 10 is by two radiating slots 15 to outside radiation signal.
The method that the filter antenna is cascaded using bimodulus rectangular cavity 11 and single mode rectangular cavity 10, makes the present invention only
Can is cascaded with three transmission poles of interior acquisition using two resonators；Bimodulus rectangular cavity 11 of the present invention
So that the filter antenna of design is less than band connection frequency and higher than respectively there is a zero point at band connection frequency, so as to obtain higher band
Outside inhibitory energy, and then improve the selectivity of passband；Being symmetrical arranged for two radiating slots 15 of the present invention, makes the filtering day
Line has ultralow cross polarization characteristics.
Preferably, in the present embodiment, single mode rectangular cavity 10 and the local alignment of bimodulus rectangular cavity 11, and this is right
It is identical and mutual that size is respectively arranged with the second metal layer 5 and the 3rd metal level 6 corresponding to accurate part
First coupling gap 13 and second of face couples gap 14 with by the bimodulus rectangular cavity 11 and the single mode rectangle
The coupled cascade of resonator 10.
Further, feeding microstrip line 12, first couples gap 13 and second and couples the rectangular strip in gap 14.Feedback
The perpendicular bisector of projection of the electric microstrip line 12 along the bimodulus rectangular cavity 11 on the 4th metal level 7 is set, described
The length direction of feeding microstrip line 12 and the described second length direction for coupling projection of the gap 14 on the 4th metal level 7
It is mutually perpendicular to.The midpoint in the second coupling gap 14 projects with the single mode rectangular cavity 10 in the second metal layer 5
Midpoint overlap, and it is described second coupling gap 14 length direction it is parallel with first perpendicular bisector.
As shown in Fig. 3 a Electric Field Distribution, the first metal corresponding to the single mode rectangular cavity 10 from the composition filter antenna
Transverse current distribution among layer 4 is it can be seen that single mode rectangular cavity 10 shakes in TE102Pattern, single mode rectangular cavity 10
Region (such as A and A of the short side of interior close the first metal layer 41Region) sense of current is identical.Therefore, in A and A1Region is respectively set
The radiating slot 15 of one radiation signal, double slit gap cavity-backed radiator antenna can be formed.Set in filter antenna provided by the invention
Projection of two radiating slots 15 on single mode rectangular cavity 10 on the first metal layer 4 geometric center it is symmetrical and close
In the first perpendicular bisector axial symmetry of the projection.Therefore have for cross polarization on filter antenna E faces and H faces such as Fig. 3 b institutes
The full symmetric CURRENT DISTRIBUTION shown, so as to so that the filter antenna obtains relatively low cross polarization characteristics.
As shown in figure 4, the filter antenna of the present invention has a low characteristic of cross polarization, cross polarization less than it is main polarization about
40dB, hence it is evident that less than value of the prior art.
As shown in figure 5, the gain of the filter antenna of the present invention is also consistent with the S21 parameters of the wave filter for filtering,
Two both sides that band connection frequency is symmetrically distributed in outer zero point, it was demonstrated that the high out-of-side rejection for the filter antenna that invention provides
Property.
Filter antenna provided by the invention not only has the function that radiation signal, moreover it is possible to the signal is filtered, due to
In the presence of two with outer zero point, therefore there is good Out-of-band rejection harmonic wave, and single mode rectangular cavity 10 this
The geometric center of projection on one metal level 4 is symmetrical and on the first perpendicular bisector axial symmetry of the projection so that the filter antenna
With relatively low cross-polarized characteristic.
It should be appreciated that for those of ordinary skills, embodiments of the invention are entered above in conjunction with accompanying drawing
Description is gone, but the invention is not limited in above-mentioned embodiment, above-mentioned embodiment is only to illustrate
Property, it is rather than restricted, one of ordinary skill in the art under the enlightenment of the present invention, do not depart from present inventive concept and
In the case of scope of the claimed protection, many forms can be also made, these are belonged within the protection of the present invention.
Claims (3)
1. a kind of filter antenna, it is characterised in that including upper medium substrate, bindiny mechanism and the lower medium being cascading
Substrate；Multiple first plated-through holes are provided with the upper medium substrate, multiple second are provided with the lower medium substrate
Plated-through hole, the upper and lower surface of the upper medium substrate are respectively arranged with the first metal layer and second metal layer, institute
The upper and lower surface for stating lower medium substrate is respectively arranged with the 3rd metal level and the 4th metal level；3rd metal level,
4th metal level and the plurality of second plated-through hole surround double-mold rectangular cavity, the first metal layer, institute
State second metal layer and the plurality of first plated-through hole surrounds single mode rectangular cavity, the bimodulus rectangular cavity and institute
State single mode rectangular cavity and pass through coupled cascade；One is provided with the lower surface of the lower medium substrate to be used for the bimodulus square
The feeding microstrip line of shape resonator feed；
Position on the first metal layer corresponding to the single mode rectangular cavity is provided with two radiating slots that are parallel to each other,
Midpoint Central Symmetry that two radiating slots project on the single mode rectangular cavity on the first metal layer and
The the first perpendicular bisector axial symmetry projected on the single mode rectangular cavity on the first metal layer；The single mode rectangle is humorous
Shake chamber and the bimodulus rectangular cavity local alignment, and the second metal layer corresponding to the part of the alignment and described
3rd metal level respectively on be respectively arranged with size it is identical and facing each other first coupling gap and second coupling gap, with
By the bimodulus rectangular cavity and the single mode rectangular cavity coupled cascade；The feeding microstrip line is along the bimodulus square
The perpendicular bisector of projection of the shape resonator on the 4th metal level is set, the feeding microstrip line, the first coupling gap
And the second coupling rectangular strip in gap, the length direction of the feeding microstrip line couple gap with described second and existed
The length direction of projection on 4th metal level is mutually perpendicular to；The midpoint in the second coupling gap and the single mode rectangle
Midpoint that resonator projects in the second metal layer overlaps, and the length direction in the second coupling gap and described the
One perpendicular bisector is parallel.
2. filter antenna according to claim 1, it is characterised in that the bindiny mechanism is bonding medium.
3. filter antenna according to claim 2, it is characterised in that the bonding medium is prepreg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085440.6A CN104638360B (en) | 2015-02-16 | 2015-02-16 | Filter antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085440.6A CN104638360B (en) | 2015-02-16 | 2015-02-16 | Filter antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104638360A CN104638360A (en) | 2015-05-20 |
| CN104638360B true CN104638360B (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510085440.6A Active CN104638360B (en) | 2015-02-16 | 2015-02-16 | Filter antenna |
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| CN (1) | CN104638360B (en) |
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| US10256522B2 (en) | 2016-03-22 | 2019-04-09 | Huawei Technologies Co., Ltd. | Vertical combiner for overlapped linear phased array |
| CN105762447B (en) * | 2016-04-21 | 2019-04-05 | 南通大学 | Double frequency difference filter |
| CN106067602B (en) * | 2016-05-23 | 2019-08-13 | 南通大学 | Dual polarization filter antenna array |
| CN107104275B (en) * | 2017-04-10 | 2019-11-29 | 南通大学 | A kind of multilayer fabric filter antenna and microwave telecommunication system |
| CN106887680B (en) * | 2017-04-10 | 2019-06-18 | 南通大学 | A kind of filter antenna and microwave telecommunication system based on dieelctric sheet |
| CN108832291B (en) * | 2018-06-25 | 2020-05-19 | 重庆大学 | Substrate integrated waveguide filter antenna |
| CN109244656A (en) * | 2018-10-31 | 2019-01-18 | 南通至晟微电子技术有限公司 | 5G millimeter wave filters broad-band antenna |
| CN109818142A (en) | 2018-12-31 | 2019-05-28 | 瑞声科技（南京）有限公司 | A kind of filter antenna |
| CN109742525B (en) * | 2018-12-31 | 2021-02-23 | 瑞声科技（南京）有限公司 | Filtering antenna |
| CN109921177A (en) * | 2018-12-31 | 2019-06-21 | 瑞声科技（南京）有限公司 | Filter antenna device |
| WO2020258214A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市大疆创新科技有限公司 | Back-fed traveling wave antenna array, radar, and movable platform |
| CN110459858B (en) * | 2019-06-30 | 2021-04-13 | 南通大学 | Filtering antenna based on substrate integrated cavity |
| CN111755784B (en) * | 2020-07-02 | 2021-12-31 | 电子科技大学 | Hybrid electromagnetic coupling compact SIW filter based on evanescent mode loading |
| CN112467389B (en) * | 2020-11-24 | 2023-09-05 | 维沃移动通信有限公司 | Electronic equipment |
| CN116982216A (en) * | 2021-02-20 | 2023-10-31 | 瑞典爱立信有限公司 | Antenna filter unit and base station having the same |
| CN113097711B (en) * | 2021-03-31 | 2022-06-14 | 华南理工大学 | Substrate integrated waveguide filter antenna with high selective radiation efficiency |
| CN113410596B (en) * | 2021-06-11 | 2022-04-01 | 大连海事大学 | Substrate integrated waveguide filter based on single-mode and double-mode mixing |
| CN113871902B (en) * | 2021-09-24 | 2022-10-25 | 西安电子科技大学 | MIMO multi-cavity butterfly filter antenna based on SIW structure |
| CN114069219B (en) * | 2021-11-17 | 2023-12-05 | 中国电子科技集团公司第二十六研究所 | Microstrip phased array antenna unit and array thereof |
| CN115313035B (en) * | 2022-08-17 | 2023-09-12 | 深圳市飞宇信电子有限公司 | SIW-based filter antenna |
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Inventor after: Fu Xiaodong Inventor after: Xu Cui Inventor after: Wang Xueren Inventor after: Liu Zhiqing Inventor after: Gu Xiaofeng Inventor after: Zheng Chaoyi Inventor before: Chu Hui Inventor before: Chen Jianxin Inventor before: Tang Hui Inventor before: Zhou Liheng Inventor before: Qin Wei Inventor before: Lu Qingyuan Inventor before: Bao Zhihua |
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Effective date of registration: 20171218 Address after: 226463 Rudong County, Jiangsu Province, the town of Zhongtian Zhongtian Industrial Park transit Broadband Technology Co., Ltd. Applicant after: Zhongtian Broadband Technology Co., Ltd. Address before: 226019 Jiangsu city of Nantong province sik Road No. 9 Institute of electronic and Information Engineering Nantong University Applicant before: Nantong University |
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Effective date of registration: 20211220 Address after: 226463 Zhongtian Broadband Technology Co., Ltd., Zhongtian Industrial Park, Hekou Town, Rudong County, Nantong City, Jiangsu Province Patentee after: ZHONGTIAN BROADBAND TECHNOLOGY Co.,Ltd. Patentee after: Zhongtian Communication Technology Co., Ltd Address before: 226463 Zhongtian Broadband Technology Co., Ltd., Zhongtian Industrial Park, Hekou Town, Rudong County, Nantong City, Jiangsu Province Patentee before: ZHONGTIAN BROADBAND TECHNOLOGY Co.,Ltd. |