CN109346840A - A printed antenna with low-profile reflection aperture structure for small antenna - Google Patents
A printed antenna with low-profile reflection aperture structure for small antenna Download PDFInfo
- Publication number
- CN109346840A CN109346840A CN201811246256.5A CN201811246256A CN109346840A CN 109346840 A CN109346840 A CN 109346840A CN 201811246256 A CN201811246256 A CN 201811246256A CN 109346840 A CN109346840 A CN 109346840A
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- Prior art keywords
- layer
- antenna
- microstrip
- loading
- feeding
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000005855 radiation Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229920005830 Polyurethane Foam Polymers 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000011496 polyurethane foam Substances 0.000 claims 1
- 230000011514 reflex Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005476 soldering Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
- H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
Landscapes
- Details Of Aerials (AREA)
Abstract
The present invention devises a kind of reflex port diametric plane structural printing antenna of small size antenna low section, has the characteristics that the antenna that broad beam, broadband, high front and back ratio, low section minimize, is related to antenna technical field.For solve existing microstrip antenna can not combine broadband, broad beam, high front and back than, small-sized low section a kind of printed antenna invented.Printed antenna of the present invention uses multilayered structure, and top layer uses printed circuit board arrangement, and upper layer and lower layer are using the microstrip line construction coupled；Middle layer is the closing metal cavitg of insulating foams filling, wherein the coaxial line for being used to feed comprising one；Bottom carries out micro-strip using microstrip structure and converts to the feed of coaxial line, forms the big height difference parallel feed mode of low section.The present invention can be used near field hand-held radar detecting equipment and small-sized mobile base station.
Description
Technical field
The present invention relates to antenna technical fields more particularly to a kind of small size antenna low section reflex port gauge structure to print day
Line.
Background technique
Printed antenna has the advantages such as thickness is small, dielectric constant is controllable, structure type is relatively easy, processing performance is good, because
This is applied widely.Printed antenna includes a variety of structure types, and in terms of composition, traditional printing antenna mainly includes two
Element is radiating element, feed structure respectively.
The application scenarios that the present invention program is directed to are the portable detection radar wide-band near field, low section printed circuit board
Antenna, operating center frequency is near 3.3GHz, and distance is not more than 16mm to antenna thickness from top to bottom.
The existing microstrip antenna used on a large scale mostly uses traditional three-decker form, radiating element generally top layer,
With reference to ground in bottom, the mode frequently with bottom feedback or side feedback is fed, but since microstrip antenna is with reference to ground size limitation, often
Biggish back lobe effect can be generated, for hand-held radar detecting equipment, biggish backward echo is often generated, was detecting
Go out false target in journey, is unfavorable for the detection of near-field target, therefore traditional low section microstrip antenna is difficult to meet actual use
Demand.
Summary of the invention
The embodiment provides a kind of printed antenna bores to load catoptric arrangement, can keep low section
Under the premise of structural constraint, broadband wave beam is realized, to influence to target scattering on handheld detecting device after playing reduction.
In order to achieve the above objectives, in a first aspect, the embodiment provides a kind of semi-enclosed bore load reflections
Structure, the bore load catoptric arrangement are a rectangular metal cavity body structure, cavity all round closure, open-top, with radiation list
Member is connected, and opens a circular hole in the middle part of bottom, coaxial feeder is facilitated to pass through.
In the first mode in the cards, with reference to first aspect, the inside cavity is air.
In second of mode in the cards, with reference to first aspect, the inside cavity is filled with relative dielectric constant
It is approximately 1.0 polyurethane foamed material.
In the third mode in the cards, with reference to first aspect with the first mode in the cards, bottom opening
Shape is circle.
In the 4th kind of mode in the cards, with reference to first aspect with the first mode in the cards, bottom opening
For cross type groove, cross groove center is corresponding with top-fed structure.
In the 5th kind of mode in the cards, with reference to first aspect with second of mode in the cards, bottom opening
For rectangle.
In the 6th kind of mode in the cards, with reference to first aspect with second of mode in the cards, bottom opening
For cross type groove, cross groove center is corresponding with top-fed structure.
Second aspect, the embodiment of the invention provides a kind of bores of multilayer to load low section wide-band printing antenna form,
Wherein reflex port gauge structure form by adopting the above technical scheme in any bore structure type constitute.
In the first possible implementation, in conjunction with second aspect, microstrip line unit is radiated in first layer, dipole feed
Unit is in the second layer, and bore load catoptric arrangement is in third layer, with insulation PCB substrate phase between first layer and the second layer
Every the second layer and third layer are welded by Reflow Soldering and be connected.
In second of possible implementation, in conjunction with second aspect, dipole feed element exists in first layer, radiating element
The second layer, and bore load catoptric arrangement is in third layer, is separated by between first layer and the second layer with insulation PCB substrate, second
Layer is solidly connected with third layer with bonding form.
The third aspect, the embodiment of the invention provides a kind of for the low of printed antenna described in second aspect and the third aspect
Section height difference parallel feed scheme realizes antarafacial parallel feed using the combination that coaxial bottom and micro-strip side are presented, to reduce
The whole height of integrated antenna and feed structure, is conducive to over all Integration.
Detailed description of the invention
Illustrate the embodiment of the present invention or technical solution in the prior art in order to clearer, below will to an embodiment with
And attached drawing needed to be used in the description of the prior art does simple introduction, it is required it is emphasized that drawings discussed below only
It is only some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is that printed antenna of embodiment of the present invention bore loads catoptric arrangement schematic diagram；
Fig. 2 is printed antenna of embodiment of the present invention multilayered structure explosive view；
Fig. 3 is the cross section structure schematic diagram of printed antenna of the embodiment of the present invention；
Fig. 4 is another cross section structure schematic diagram of printed antenna of the embodiment of the present invention；
Fig. 5 is printed antenna of embodiment of the present invention return loss test result schematic diagram；
Fig. 6 is that printed antenna of embodiment of the present invention directional diagram is compared from the emulation under 2.9GHz~3.8GHz with test result
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is emphasized that, the described embodiment is only a part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, belongs to the scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have specific range, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Referring to Fig.1, Fig. 1 is that the bore of printed antenna of the embodiment of the present invention loads catoptric arrangement 101, is a surrounding
Closed metal cavity, top is opened wide, bottom has the structure of circular port diameter groove 102, and 103, which turn coaxial configuration for micro-strip, connects
Mouthful, 104 turn coaxial feed power port for micro-strip, and 105 install limiting slot for electric connector.
Bore load catoptric arrangement in the embodiment of the present invention is process using rust-preventing aluminum alloy entirety machinery, whole ruler
Very little is 56mm × 56mm × 13mm, and in order to mitigate weight, surrounding wall thickness is 1mm, and bottom thickness 1.5mm (locally increases 1.5mm
For being formed 103), bottom bore 102 is having a size of φ 8mm, depth 2mm, according to ratio before and after different working frequency range and antenna
It is required that emulation selection can be carried out to bore dimensional parameters.In the present embodiment, coaxial feed power port is having a size of φ 2.3mm, with feed
The coaxial outside dimension in port matches.
Referring to Fig.1,101 be designed as rectangular cavities structure be based primarily upon two considerations, first, in order to press down as far as possible
Backward radiation electric field processed needs to design reasonable boundary condition, and the horizontal bottom of cavity makes electric field cross stream component be zero, surrounding
Metallic walls make electric field vertical component be zero, therefore compared to single table plate is used, this mode can be generated more
Good backward rejection ability.
Referring to Fig.1,103 shape can be designed as round, rectangle or cruciform shape, essence produce it is discontinuous
The metallic channel of property, to form radiation current at the discontinuous place of structure, this portion of electrical current can further reduce the antenna spoke that disappears
The backward radiation wave of unit is penetrated, to improve the front and back ratio of radiation pattern.
It is printed antenna of embodiment of the present invention multilayered structure explosive view referring to Fig. 2, Fig. 2,201 be base drive circuit, is adopted
A microstrip circuit is formed on PCB with etching technics, is mainly used for realizing that micro-strip turns coaxial feed；
Reference Fig. 2,202 load catoptric arrangement for bore shown in FIG. 1, are fabricated using whole machinery, in order to
Welding operation, has carried out silver-plated surface processing 202；
Referring to Fig. 2, it is spirally connected between 201 and 202 with the screw of 4 M2；
Referring to Fig. 2,203 be a section coaxial line, and outside is shielded using gauze screen, to reduce energy leakage to the greatest extent；
203 bottoms pass through the microstrip line on the through-hole and 201 on 202 and carry out spot welding connection；
Referring to Fig. 2,204 be a printed circuit board, and there is the top-fed unit generated by etching technics in top surface, and bottom surface has
The symmetrical dipole radiating element being made up of etching；
Referring to Fig. 2,203 coaxial top outer copper skins and 204 bottom radiating elements carry out spot welding connection, 203 top inner conductors
Spot welding connection is carried out with 204 top surface feed elements；
Referring to Fig. 2, covering copper and passing through Reflow Soldering by 202 top surfaces that electroplate is handled in 204 bottom edges is carried out
It is connected and fixed；Referring to Fig. 2,205 be horizontal plugging electric connector, carries out structure limit by the limiting slot on 202, and by spot welding with
202 bottom spot welding are connected and fixed.
Referring to Fig. 2, the present embodiment should carry out production connection according to following sequence during specific implementation,
The first step fixes 203 top inner conductors and 204 top surface spot welding；
Second step is welded 203 top outer conductors with 204 radiating elements entirely with scolding tin, to guarantee 203 and 204 welderings
Junction product is sufficiently large, and whole uniform force is reliable, can bear certain external force and pull；
Third step fixes with 202 progress Reflow Solderings as a whole with 204 by 203, guarantees 203 before Reflow Soldering
It is stretched out by via hole from 202 bottom surfaces；
The entirety that 201 and 202,203 and 204 form is carried out the fixation that is spirally connected with countersunk head screw by the 4th step；
5th step is pushed into 205 in the limiting slot on 202, and the micro-strip on the probe and 201 bottom surfaces on 205 is welded
Tin carries out welding and is connected；
205 tail portions are carried out full solid welding with 202 and determined by the 6th step, to guarantee that the external force for plugging cable is not transferred to 205
The probe end of heteropleural.
Fig. 3 and Fig. 4 gives cross-sectional view of the printed antenna under different angle in the present embodiment.
Fig. 5 gives actual test of the present embodiment reflection parameters in 3000MHz~5000MHz frequency range as a result, can be with
Find out and be respectively less than -15dB in design frequency range 2900MHz~3500MHz reflection coefficient of the present embodiment, meets design and use
Demand.
Fig. 6 gives the printed antenna directional diagram at typical frequency point, it can be seen that in orientation, reality is surveyed for pitching
Test result differs very little with simulation result, and front and back ratio is all larger than 18dB, has reached actual use demand.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, the change that can be made easily should all be covered those familiar with the art
Within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246256.5A CN109346840B (en) | 2018-10-25 | 2018-10-25 | A printed antenna with low-profile reflection aperture structure for small antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246256.5A CN109346840B (en) | 2018-10-25 | 2018-10-25 | A printed antenna with low-profile reflection aperture structure for small antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109346840A true CN109346840A (en) | 2019-02-15 |
| CN109346840B CN109346840B (en) | 2021-06-08 |
Family
ID=65311495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811246256.5A Active CN109346840B (en) | 2018-10-25 | 2018-10-25 | A printed antenna with low-profile reflection aperture structure for small antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109346840B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070132642A1 (en) * | 2005-12-08 | 2007-06-14 | Elta Systems Ltd. | Patch antenna element and application thereof in a phased array antenna |
| CN202797262U (en) * | 2012-10-08 | 2013-03-13 | 中国电子科技集团公司第五十四研究所 | Broadband loose-coupling phased-array feed-source unit |
| CN107221743A (en) * | 2016-03-21 | 2017-09-29 | 中国工程物理研究院电子工程研究所 | A kind of phased array element of broadband and wideangle circular polarisation |
-
2018
- 2018-10-25 CN CN201811246256.5A patent/CN109346840B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070132642A1 (en) * | 2005-12-08 | 2007-06-14 | Elta Systems Ltd. | Patch antenna element and application thereof in a phased array antenna |
| CN202797262U (en) * | 2012-10-08 | 2013-03-13 | 中国电子科技集团公司第五十四研究所 | Broadband loose-coupling phased-array feed-source unit |
| CN107221743A (en) * | 2016-03-21 | 2017-09-29 | 中国工程物理研究院电子工程研究所 | A kind of phased array element of broadband and wideangle circular polarisation |
Non-Patent Citations (1)
| Title |
|---|
| DONG-ZE ZHENG ET AL: ""Cavity-Backed Self-Phased Circularly Polarized Multidipole Antenna With Wide Axial-Ratio Beamwidth"", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
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| Publication number | Publication date |
|---|---|
| CN109346840B (en) | 2021-06-08 |
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