CN112310631A - Miniaturized microstrip antenna based on PCB - Google Patents
Miniaturized microstrip antenna based on PCB Download PDFInfo
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- CN112310631A CN112310631A CN202011231292.1A CN202011231292A CN112310631A CN 112310631 A CN112310631 A CN 112310631A CN 202011231292 A CN202011231292 A CN 202011231292A CN 112310631 A CN112310631 A CN 112310631A
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- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 abstract description 23
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a miniaturized microstrip antenna based on a PCB (printed circuit board), which comprises a ground plate, a dielectric layer, a radiation patch, metal columns and a coaxial feed column, wherein the dielectric layer is arranged at the top of the ground plate, the radiation patch is arranged at the top of the dielectric layer, the longitudinal side edge of the radiation patch is symmetrically provided with first rectangular grooves with the same shape, the transverse side edge of the front part of the radiation patch is symmetrically provided with second rectangular grooves with the same shape and symmetry, the two second rectangular grooves are separated by a microstrip line, a plurality of metal columns are inserted from the top of the radiation patch and extend to the bottom of the ground plate, the coaxial feed column comprises a first feed column and a second feed column which has the diameter smaller than that of the first feed column and is coaxially arranged with the first feed column, the first feed column is connected with the bottom of the ground plate, and the second feed column extends into the microstrip line from the bottom of the ground plate, the miniaturized microstrip antenna based on PCB increases the bandwidth of the antenna and reduces the size of the antenna.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a miniaturized microstrip antenna based on a PCB.
Background
With the development of modern mobile communication technology and military requirements, communication antennas are being developed toward small-sized users and multiple functions. Microstrip antennas are widely used in wireless communication systems due to their advantages of thin profile, low cost, and easy conformality. The size of the narrow side of a traditional microstrip antenna radiation patch is about half medium wavelength, and when the antenna frequency is low, the antenna size is large and can not meet the requirement in many times.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or the problems occurring in the prior art antenna having a large size.
Therefore, an object of the present invention is to provide a PCB-based miniaturized microstrip antenna capable of effectively increasing the bandwidth of the antenna and reducing the size of the antenna.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a PCB-based miniaturized microstrip antenna, comprising:
a ground plate;
the dielectric layer is arranged on the top of the grounding plate;
the radiation patch is arranged at the top of the dielectric layer, the longitudinal side edge of the radiation patch is symmetrically provided with first rectangular grooves with the same shape, the transverse side edge of the radiation patch at the front part of the radiation patch is symmetrically provided with second rectangular grooves with the same shape and symmetry, and the two second rectangular grooves are separated by a microstrip line;
a plurality of metal posts inserted from the top of the radiating patch and extending to the bottom of the ground plate;
the coaxial feed column comprises a first feed column and a second feed column, the diameter of the second feed column is smaller than that of the first feed column, the second feed column and the first feed column are coaxially arranged, the first feed column is connected with the bottom of the grounding plate, and the second feed column extends into the microstrip line from the bottom of the grounding plate.
As a preferable scheme of the PCB-based miniaturized microstrip antenna of the present invention, the dielectric layer is a dielectric substrate having a dielectric constant of 2.2.
As a preferable solution of the PCB-based miniaturized microstrip antenna according to the present invention, the width of the first rectangular slot is smaller than the length of the longitudinal side of the radiation patch, and the length is smaller than half of the length of the lateral side of the radiation patch.
As a preferable aspect of the miniaturized microstrip antenna based on PCB of the present invention, wherein a width of the second rectangular slot is less than a half of a length of a lateral side of the radiation patch.
As a preferable scheme of the PCB-based miniaturized microstrip antenna of the present invention, a row of through holes adapted to the metal posts is formed at the top of the radiation patch.
Compared with the prior art, the invention has two beneficial effects: two parallel rectangular grooves with the same shape are respectively formed in two sides of the middle line of the long side of the rectangular microstrip antenna, so that the impedance bandwidth of the antenna is improved. The radiating patch is subjected to slotting processing, a current path is increased, the size of the antenna is reduced, and meanwhile, a metal column is introduced to the tail end of the antenna to reduce the size of the antenna. By combining the two modes, the bandwidth of the antenna is increased, and the size of the antenna is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:
fig. 1 is a schematic view of an overall structure of a miniaturized microstrip antenna based on a PCB according to the present invention;
fig. 2 is a front view of the overall structure of a miniaturized microstrip antenna based on a PCB according to the present invention;
fig. 3 is a schematic diagram of a reflection coefficient of a miniaturized microstrip antenna based on a PCB according to the present invention;
fig. 4 is a simulated overall layout diagram of a miniaturized microstrip antenna based on a PCB provided in the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a miniature microstrip antenna based on a PCB (printed Circuit Board), which can effectively increase the bandwidth of the antenna and reduce the size of the antenna.
Fig. 1 to 3 are schematic structural diagrams and schematic reflection coefficients of an embodiment of a PCB-based miniaturized microstrip antenna according to the present invention, and referring to fig. 1 to 3, a main body of the PCB-based miniaturized microstrip antenna according to the present embodiment includes a ground plate 100, a dielectric layer 200, a radiation patch 300, a metal pillar 400, and a coaxial feed pillar 500.
The ground plane 100 is used for grounding and acts as a carrier for the dielectric layer 200.
The dielectric layer 200 is disposed on top of the ground plane 100, which serves as a constituent structure of the miniaturized microstrip antenna for mounting the radiation patch 300. In this embodiment, the dielectric layer 200 is preferably a dielectric substrate having a dielectric constant of 2.2.
The radiating patch 300 is disposed on the top of the dielectric layer 200, the longitudinal side of the radiating patch is symmetrically provided with first rectangular slots 310 with the same shape for increasing current path, the transverse side of the radiating patch is symmetrically provided with second rectangular slots 320 with the same shape and symmetry for increasing antenna impedance bandwidth, and the two second rectangular slots 320 are separated by a microstrip line 330. Preferably, in the present embodiment, the width of the first rectangular groove 310 is less than the length of the longitudinal side of the radiation patch 300, the length is less than half of the length of the lateral side of the radiation patch 300, and the width of the second rectangular groove 320 is less than half of the length of the lateral side of the radiation patch 300.
A plurality of metal posts 400 are provided at the ends of the radiating patch 300, inserted from the top of the radiating patch 300, and extended to the bottom of the ground plate 100 for introducing short circuit loading. Preferably, in this embodiment, a row of through holes matched with the metal posts 400 are formed at the top of the radiation patch 300.
The PCB-based miniaturized microstrip antenna designed as above is subjected to simulation verification on effectiveness.
The antenna simulation model is shown in fig. 4, the antenna is designed by adopting a microstrip antenna and consists of three frequency points of 1290, 1485 and 2584 MHz. The upper part is a two-wire polarized antenna array, the central frequency is 1290 and 2584MHz, the thickness of the dielectric substrate is 1mm, the dielectric constant is 2.2, and the material of the antenna dielectric substrate is F4BMX 220. The miniaturization is achieved by making a rectangular slot in the radiating patch 300 and inserting a metal post 400 on the antenna.
The lower part is a circularly polarized antenna array, the central frequency is 1290MHz, and the size of an antenna unit is 48 mm. The antenna dielectric substrate adopts Wangling F4BTM-2, the dielectric constant is 4.4, and the thickness is 0.8 mm. The antenna adopts coaxial direct feed, realizes the circular polarization function by cutting circles with different radiuses at four corners of the antenna, and realizes the miniaturization purpose by slotting on four edges.
The simulation performance of the antenna at each frequency point is shown in the table above. The two-wire polarized array finds that all the performances of the antenna basically meet the antenna index requirements through actual measurement. The center frequency of the circularly polarized antenna is offset from the index by 20 MHz. The axial ratio bandwidth of the antenna unit is 10MHz, and the requirement of the index is met. The antenna size meets the index requirements. However, the main problem of the present antenna is that the standing wave of the antenna is estimated to be adjusted by the following one-to-two microstrip power dividing network when the circular polarized antenna satisfies the antenna axial ratio and the standing wave of the antenna deviates from the center frequency by about 20 MHz. The axial ratio and axial ratio bandwidth of the antenna meet the index requirement. Therefore, the design of the antenna for achieving the purpose of miniaturization by opening the rectangular slot on the patch and inserting the metal column on the antenna can meet the more reasonable index requirement and meet the practical application. With reference to fig. 1 to 4, a miniaturized microstrip antenna based on PCB of the present embodiment utilizes a dielectric constant with a low dielectric constant as a dielectric layer to reduce the quality factor of the antenna; meanwhile, two parallel second rectangular grooves 320 with the same shape are respectively formed on two sides of a central line of a long side (namely two sides of a transverse side) of the radiation patch 300, so that the impedance bandwidth of the antenna is improved, and the current distribution of each resonance mode is different on a metal surface of the microstrip antenna. If a groove is dug in the same resonance mode, the groove will break the current path of the original resonance mode, so that the current path is lengthened and the size of the antenna is reduced, therefore, a first rectangular groove 310 is formed on the longitudinal side edge of the radiation patch 300, the current path is increased, the size of the antenna is reduced, and meanwhile, a metal column 400 through hole is introduced into the tail end of the radiation patch 300 to reduce the size of the antenna. Compared with the traditional antenna, the miniaturized microstrip antenna based on the PCB is reduced by about 60% in size. The traditional miniaturized antenna mostly adopts a single miniaturization technology to reduce the size of the antenna, the size reduction of the antenna is limited, and the size of the antenna is reduced by about 20 percent compared with the traditional miniaturized antenna. And as can be seen from fig. 3, the antenna operating frequency is 1448MHz, and the antenna gain is about 3 DB.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A miniaturized microstrip antenna based on a PCB, comprising:
a ground plate (100);
a dielectric layer (200) disposed on top of the ground plane (100);
the radiating patch (300) is arranged at the top of the medium layer (200), the longitudinal side edge of the radiating patch is symmetrically provided with first rectangular grooves (310) with the same shape, the transverse side edge of the radiating patch at the front part of the radiating patch is symmetrically provided with second rectangular grooves (320) with the same shape and symmetry, and the two second rectangular grooves (320) are separated by a microstrip line (330);
a plurality of metal posts (400) inserted from the top of the radiating patch (300) and extended to the bottom of the ground plate (100);
the coaxial feed column (500) comprises a first feed column and a second feed column which is smaller than the first feed column in diameter and is coaxially arranged with the first feed column, the first feed column is connected with the bottom of the grounding plate (100), and the second feed column extends into the microstrip line (330) from the bottom of the grounding plate (100).
2. The miniaturized microstrip antenna based on PCB of claim 1, wherein the dielectric layer (200) is a dielectric substrate with a dielectric constant of 2.2.
3. A PCB-based miniaturized microstrip antenna according to claim 1 wherein the width of the first rectangular slot (310) is less than the length of the longitudinal side of the radiating patch (300) and the length is less than half the length of the transverse side of the radiating patch (300).
4. A PCB-based miniaturized microstrip antenna according to claim 1 wherein the width of the second rectangular slot (320) is less than half the length of the lateral side of the radiating patch (300).
5. A PCB-based miniaturized microstrip antenna according to claim 1 wherein the top of the radiating patch (300) is provided with a row of through holes adapted to the metal posts (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231292.1A CN112310631A (en) | 2020-11-06 | 2020-11-06 | Miniaturized microstrip antenna based on PCB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231292.1A CN112310631A (en) | 2020-11-06 | 2020-11-06 | Miniaturized microstrip antenna based on PCB |
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| Publication Number | Publication Date |
|---|---|
| CN112310631A true CN112310631A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011231292.1A Pending CN112310631A (en) | 2020-11-06 | 2020-11-06 | Miniaturized microstrip antenna based on PCB |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555682A (en) * | 2021-07-01 | 2021-10-26 | 北京航空航天大学 | Miniaturized three-frequency-band microstrip antenna |
| CN114914666A (en) * | 2021-02-10 | 2022-08-16 | 华为技术有限公司 | Antenna and electronic equipment |
| CN115548647A (en) * | 2021-06-30 | 2022-12-30 | 华为技术有限公司 | Microstrip antenna and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359589B1 (en) * | 2000-06-23 | 2002-03-19 | Kosan Information And Technologies Co., Ltd. | Microstrip antenna |
| CN104009292A (en) * | 2014-06-05 | 2014-08-27 | 太原理工大学 | Miniaturized broadband microstrip antenna |
| CN107768809A (en) * | 2016-08-18 | 2018-03-06 | 南京理工大学 | A kind of microstrip antenna of low section air dielectric |
| CN210326113U (en) * | 2019-10-11 | 2020-04-14 | 中国人民解放军第六九O五工厂 | Miniaturized conformal antenna |
-
2020
- 2020-11-06 CN CN202011231292.1A patent/CN112310631A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359589B1 (en) * | 2000-06-23 | 2002-03-19 | Kosan Information And Technologies Co., Ltd. | Microstrip antenna |
| CN104009292A (en) * | 2014-06-05 | 2014-08-27 | 太原理工大学 | Miniaturized broadband microstrip antenna |
| CN107768809A (en) * | 2016-08-18 | 2018-03-06 | 南京理工大学 | A kind of microstrip antenna of low section air dielectric |
| CN210326113U (en) * | 2019-10-11 | 2020-04-14 | 中国人民解放军第六九O五工厂 | Miniaturized conformal antenna |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914666A (en) * | 2021-02-10 | 2022-08-16 | 华为技术有限公司 | Antenna and electronic equipment |
| CN114914666B (en) * | 2021-02-10 | 2024-03-26 | 华为技术有限公司 | Antenna and electronic equipment |
| CN115548647A (en) * | 2021-06-30 | 2022-12-30 | 华为技术有限公司 | Microstrip antenna and electronic equipment |
| CN113555682A (en) * | 2021-07-01 | 2021-10-26 | 北京航空航天大学 | Miniaturized three-frequency-band microstrip antenna |
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Application publication date: 20210202 |