CN202217783U - Broadband miniaturized micro-strip grid array antenna - Google Patents
Broadband miniaturized micro-strip grid array antenna Download PDFInfo
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- CN202217783U CN202217783U CN2011202438224U CN201120243822U CN202217783U CN 202217783 U CN202217783 U CN 202217783U CN 2011202438224 U CN2011202438224 U CN 2011202438224U CN 201120243822 U CN201120243822 U CN 201120243822U CN 202217783 U CN202217783 U CN 202217783U
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- array antenna
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- little band
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Abstract
The utility model relates to a broadband miniaturized micro-strip grid array antenna. The antenna comprises a thin medium substrate, a metal thin layer which is adhered to the lower surface of the thin medium substrate and serves as a ground plate, and a metal paster which is adhered to the upper surface of the thin medium substrate. The metal paster comprises a plurality of radiation units and transmission lines for connecting the radiation units, wherein each radiation unit has an oval cross section. The antenna is printed on a PCB. A 50 Omega coaxial line is directly utilized for feeding. The oval radiation units are adopted for increasing impedance and gaining width, and the sine type transmission lines are employed to reduce the size of the antenna. The antenna is provided with seven radiation units. The structural parameters of the antenna are optimized through a genetic algorithm on a parallel machine. The antenna prototype is processed and tested, and a simulation result matches a test result. If S11 is less than -10dB, a bandwidth reaches to 25% and a 3dB gain bandwidth reaches to 16.3%. Compared with a conventional grid array antenna bandwidth, the antenna of the utility model allows the bandwidth to be greatly improved, enables the dimension of the antenna to be reduced by 47%, and enables the gain to reach 13.7dBi.
Description
Technical field
The utility model relates to a kind of little band raster array antenna of Wideband miniaturization that is applied to WLAN, belongs to field of antenna in the wireless device.
Background technology
Antenna is the critical component in the wireless device, and it is bearing the function of power conversion function and directed radiation (or reception), directly determines the efficient of electromagnetic energy in the space transmission, influences the entire wireless communication system work.Flourish along with the radio communication cause; Antenna performance many special and requirements harshness have been proposed; Cell phone, global positioning system (GPS), synthetic aperture radar (SAR), satellite communication, personal communication (GSM 900/DCS1800); The particularly 3G (Third Generation) Moblie of present stage, and WLAN field requires antenna will possess broadband, structure miniaturization, simple in structure, low preparation cost simultaneously and is fit to performance such as production in enormous quantities.The traditional antenna type is difficult to satisfy simultaneously above-mentioned all properties requirement.
A kind of little band raster array antenna of Wideband miniaturization that is applied to WLAN has been obtained some achievements at aspects such as miniaturization, the beamwidth of antenna, high-gain, feeding classifications, can satisfy the requirement to antenna of present WLAN.
Also has the some shortcomings part in the grid array antenna in the past.At first, the input impedance of antenna many times is higher than 50 Ω, so if antenna just must impedance transformer through 50 Ω coaxial feedings commonly used the time.The second, the frequency bandwidth of grid array antenna is very narrow, and the bandwidth of the VSWR of most antennas＜2 o'clock only has 2.6%, and the 3dB gain bandwidth is less than 7%.The 3rd, traditional grid array antenna size is bigger, is difficult to satisfy the requirement to antenna miniaturization of our current wireless local area network (LAN).
The utility model content
The technical problem that the utility model will solve provides the little band raster array antenna of a kind of broadband miniaturization, directly uses 50 Ω coaxial feedings.Be used to reduce the physical size of present antenna, increase the beamwidth of antenna, simplify feeding classification, improve the gain of antenna.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: the little band raster array antenna of a kind of broadband miniaturization, directly use 50 Ω coaxial feedings; This antenna comprise the thin-medium substrate, attached to said thin-medium substrate lower surface as the thin metal layer of ground plate and attached to the metal patch of said thin-medium substrate upper surface; Said metal patch comprises that several cross sections are oval-shaped radiating element and the transmission line that connects said radiating element.
Preferably, said cross section is that oval-shaped radiating element is 7, arranges according to the mode of 2 of fronts, 3 of centres, 2 of back.
Preferably, the long limit L of said radiating element
aLength is 65.6mm; Minor face L
bLength is 45.5mm.
Preferably, said transmission line is sinusoidal pattern, its amplitude A
mBe 8.4mm.
Preferably, the length of transmission line L that connects two adjacent radiating elements
tBe 55mm.
Preferably, the thickness h of said thin-medium substrate
2Be 6.42mm.
Preferably, the cross section of said transmission line is rounded, its diameter W
tBe 3.6mm.
Miniaturization little band raster array antenna in the utility model broadband has proposed a kind of new little band raster array antenna; It does not directly need impedance transformer with 50 Ω coaxial feedings; In order to increase frequency bandwidth and to realize miniaturization; Antenna has adopted oval radiating element and sinusoidal pattern transmission line to constitute grid cell, and on parallel machine, combines the Finite Difference-Time Domain separating method that the structural parameters of antenna are optimized with genetic algorithm.
The utility model can be applied to transmitting and receiving of wireless mode such as WLAN 802.11a/b/g/n, and it is complicated that the utility model can solve in the present antenna feeding classification, the problem that physical size is excessive and bandwidth is narrower.
Description of drawings
Fig. 1 is the structure chart of the little band raster array antenna of the utility model.
Fig. 2 is the measured value and the simulation value of the utility model antenna return loss.
Fig. 3 is the gain diagram of the utility model antenna.
Fig. 4 is the directional diagram on the utility model antenna YZ plane.
Embodiment
Through embodiment the present invention is carried out concrete description below, be necessary to be pointed out that at this present embodiment only is used for invention is further specified, can not be interpreted as restriction protection range of the present invention.The person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Miniaturization little band raster array antenna in a kind of broadband is directly used 50 Ω coaxial feedings; This antenna comprise the thin-medium substrate, attached to said thin-medium substrate lower surface as the thin metal layer of ground plate and attached to the metal patch of said thin-medium substrate upper surface; Said metal patch comprises that several cross sections are oval-shaped radiating element and the transmission line that connects said radiating element.
The little band raster array antenna of the utility model Wideband miniaturization is to obtain through improving some fundamental sum traditional antenna of innovation, and its basic thought is exactly: through some new structures, reduce the physical size of present antenna; Increase the beamwidth of antenna; Simplify feeding classification, improve the gain of antenna, this antenna is directly with 50 Ω coaxial feedings; Adopt oval radiating element to increase impedance and gain bandwidth, and reduce size with the sinusoidal pattern transmission line.This antenna has 7 radiating elements, processes antenna prototype and tests, and emulation and test result are coincide, S
11＜-10dB Time Bandwidth has reached 25%, and the 3dB gain bandwidth reaches 16.3%, compares traditional grid array antenna bandwidth and is greatly improved, and the while antenna size has reduced 47% gain and reached 13.7dBi.
The structural parameters of antenna are: the result of the structural parameters process genetic algorithm optimization of grid array antenna is (unit: mm): h as follows
2=6.42, L
a=65.6, L
b=45.5, A
m=8.4, L
t=55 and W
t=3.6.
According to the said structure parameter, processing and fabricating antenna model and carried out performance test.Test result (Fig. 3; Fig. 4; Shown in Figure 5) show the S11 of the little band raster array antenna of this Wideband miniaturization＜-the 10dB frequency range is respectively from 2.32GHz to 2.98GHz; Relative bandwidth has reached 25%, and the physical size of antenna has also dwindled 47% simultaneously, shows that this antenna has the impedance bandwidth and good miniaturization characteristic of broad.
Above-mentioned description to embodiment is can understand and use the utility model for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the utility model is not limited to the embodiment here, and those skilled in the art should be within the protection range of the utility model for improvement and modification that the utility model is made according to the announcement of the utility model.
Claims (7)
1. the little band raster array antenna of broadband miniaturization is directly used 50 Ω coaxial feedings; It is characterized in that: this antenna comprise the thin-medium substrate, attached to said thin-medium substrate lower surface as the thin metal layer of ground plate and attached to the metal patch of said thin-medium substrate upper surface; Said metal patch comprises that several cross sections are oval-shaped radiating element and the transmission line that connects said radiating element.
2. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1 is characterized in that: said cross section is that oval-shaped radiating element is 7, arranges according to the mode of 2 of fronts, 3 of centres, 2 of back.
3. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1 is characterized in that: the long limit L of said radiating element
aLength is 65.6mm; Minor face L
bLength is 45.5mm.
4. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1, it is characterized in that: said transmission line is sinusoidal pattern, its amplitude A
mBe 8.4mm.
5. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1 is characterized in that: the length of transmission line L that connects two adjacent radiating elements
tBe 55mm.
6. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1 is characterized in that: the thickness h of said thin-medium substrate
2Be 6.42mm.
7. the little band raster array antenna of a kind of broadband miniaturization as claimed in claim 1, it is characterized in that: the cross section of said transmission line is rounded, its diameter W
tBe 3.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202438224U CN202217783U (en) | 2011-07-12 | 2011-07-12 | Broadband miniaturized micro-strip grid array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202438224U CN202217783U (en) | 2011-07-12 | 2011-07-12 | Broadband miniaturized micro-strip grid array antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217783U true CN202217783U (en) | 2012-05-09 |
Family
ID=46017017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202438224U Expired - Fee Related CN202217783U (en) | 2011-07-12 | 2011-07-12 | Broadband miniaturized micro-strip grid array antenna |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319491A (en) * | 2014-10-21 | 2015-01-28 | 华南理工大学 | Broadband grid antenna array |
| CN104319491B (en) * | 2014-10-21 | 2017-01-04 | 华南理工大学 | A kind of broadband grid antenna array |
| CN110429376A (en) * | 2019-07-31 | 2019-11-08 | 西安天和防务技术股份有限公司 | Antenna element, aerial array and antenna |
| CN110459862A (en) * | 2019-08-23 | 2019-11-15 | 深圳大学 | A kind of millimeter wave grid array antenna based on slot radiation |
-
2011
- 2011-07-12 CN CN2011202438224U patent/CN202217783U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319491A (en) * | 2014-10-21 | 2015-01-28 | 华南理工大学 | Broadband grid antenna array |
| CN104319491B (en) * | 2014-10-21 | 2017-01-04 | 华南理工大学 | A kind of broadband grid antenna array |
| CN110429376A (en) * | 2019-07-31 | 2019-11-08 | 西安天和防务技术股份有限公司 | Antenna element, aerial array and antenna |
| CN110459862A (en) * | 2019-08-23 | 2019-11-15 | 深圳大学 | A kind of millimeter wave grid array antenna based on slot radiation |
| CN110459862B (en) * | 2019-08-23 | 2021-05-18 | 深圳大学 | Millimeter wave grid array antenna based on slot radiation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20180712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |