CN202797290U - T-shaped slot-type coplanar double-frequency microstrip antenna - Google Patents
T-shaped slot-type coplanar double-frequency microstrip antenna Download PDFInfo
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- CN202797290U CN202797290U CN2012202524879U CN201220252487U CN202797290U CN 202797290 U CN202797290 U CN 202797290U CN 2012202524879 U CN2012202524879 U CN 2012202524879U CN 201220252487 U CN201220252487 U CN 201220252487U CN 202797290 U CN202797290 U CN 202797290U
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- strip antenna
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Abstract
The utility model discloses a T-shaped slot-type coplanar double-frequency microstrip antenna. The antenna comprises a microstrip substrate, a radiation sticker, an impedance-matching input microstrip line, a reverse T-shaped metal grounding plate and a semicircular metal grounding plate; wherein the radiation sticker and the impedance-matching input microstrip line are arranged on the upper surface of the microstrip substrate; a T-shaped slot is arranged at a position 4.5 to 5.5 mm away from the top of the radiation sticker; the bottom of the radiation sticker is connected with one end of the impedance-matching input microstrip line, while the other end of the impedance-matching input microstrip line is connected with the bottom of the microstrip substrate; the T-shaped metal grounding plate and the semicircular metal grounding plate are arranged on the lower surface of the microstrip substrate; and the bottom of the semicircular metal grounding plate is connected with the bottom of the microstrip substrate. The T-shaped slot-type coplanar double-frequency microstrip antenna provided by the utility model has stable radiation characteristics within the working frequency band, and has the advantages of low loss, low cost, simple structure and ease of manufacturing.
Description
Technical field
The utility model relates to antenna, relates in particular to a kind of T-shaped open flume type double-frequency micro-strip antenna.
Technical background
Antenna is as an important wireless device in the communication system, and the quality of its performance will directly affect the performance of wireless device.It is little, lightweight that microstrip antenna has a volume, low section, can with the carrier syntype, make simply, cost is low, and is easy of integration, realizes easily the plurality of advantages such as double frequency, multiband work, therefore nearly more than ten years microstrip antenna has obtained widely research and development.The double frequency, the multiband microstrip antenna that are applicable to broadband WLAN are also obtaining research and development.In order to make microstrip antenna realize two-frequency operation, method commonly used has multi-disc method, multimode monolithic method, loads the monolithic method.But its complex structure, difficulty of processing is large.Consider the importance that antenna structure is simply used engineering, after common microstrip antenna is transformed, can satisfy the requirement of WLAN double frequency.But the module gain of microstrip antenna is lower, and therefore the normal micro-strip array antenna that is comprised of the microband paste unit that adopts obtains larger gain or realizes specific directivity.
Although the energy two-frequency operations such as more existing microstrip antennas such as inverted F shaped antenna on the market,, directional properties is poor, and loss is large, therefore satisfies the requirement of WLAN communication system in the urgent need to the array antenna that works out a kind of high-gain, low-loss, two-frequency operation.By correctly size, material and the shape of selective scattering medium, it can stop the propagation of electromagnetic wave on certain direction or all directions, has been widely used in the design of the microwave circuits such as filter, power splitter.The method that utilization is slotted in radiation patch can realize double-frequency micro-strip antenna.
Summary of the invention
The utility model provides a kind of T-shaped open flume type double-frequency micro-strip antenna in order to overcome the deficiency that prior art is narrow at the WLAN (wireless local area network) midband, loss is large.
In order to achieve the above object, the technical solution of the utility model is as follows:
T-shaped open flume type double-frequency micro-strip antenna comprises little belt substrate, radiation patch, impedance matching input microstrip line, inverted T shape metal ground plate and semicircle metal ground plate; Little belt substrate upper surface is provided with radiation patch, impedance matching input microstrip line, be provided with T-shaped fluting apart from radiation patch top 4.5mm～5.5mm place, the radiation patch bottom links to each other with impedance matching input microstrip line one end, and the other end of impedance matching input microstrip line links to each other with the bottom of little belt substrate; Little belt substrate lower surface is provided with inverted T shape metal ground plate and semicircle metal ground plate, and the bottom of semicircle metal ground plate links to each other with the bottom of little belt substrate.
Described little belt substrate is the FR4 material.The length of described little belt substrate is 21mm～23mm, and wide is 21mm～23mm.The length of described radiation patch is 20mm～22mm, and wide is 10mm～14mm.The height of described T-shaped fluting is 4mm～8mm, and long is 12mm～15mm, and groove width is 1mm～3mm.Described impedance matching input microstrip line adopts feed microstrip line to be connected with radiation patch, and characteristic impedance is 50 Ω.The width of described impedance matching input microstrip line is 2mm～3mm.The length of described inverted T shape metal ground plate is 8mm～10mm, and wide is 5mm～8mm, and live width is 1mm～3mm.The radius of described semicircle metallic plate ground plate is 8mm～9mm.The spacing on the top of the bottom of described inverted T shape metal ground plate and semicircle metallic plate ground plate is 0.5mm～1mm.
Have stable radiation characteristic in the utility model working band, loss is low, cost is low, and is simple in structure, be easy to make.
Description of drawings:
Fig. 1 is the structure chart in T-shaped open flume type double-frequency micro-strip antenna front;
Fig. 2 is the structure chart at the T-shaped open flume type double-frequency micro-strip antenna back side;
Fig. 3 is T-shaped open flume type double-frequency micro-strip antenna insertion loss curve chart;
Fig. 4 is the antenna pattern of T-shaped open flume type double-frequency micro-strip antenna when 4.3GHz;
Fig. 5 is the antenna pattern of T-shaped open flume type double-frequency micro-strip antenna when 8GHz.
Embodiment
T-shaped open flume type double-frequency micro-strip antenna comprises little belt substrate 1, radiation patch 2, impedance matching input microstrip line 4, inverted T shape metal ground plate 5 and semicircle metal ground plate 6; Little belt substrate 1 upper surface is provided with radiation patch 2, impedance matching input microstrip line 4, be provided with T-shaped fluting 3 apart from radiation patch 2 tops 4.5mm～5.5mm place, radiation patch 2 bottoms link to each other with impedance matching input microstrip line 4 one ends, and the other end of impedance matching input microstrip line 4 links to each other with the bottom of little belt substrate 1; Little belt substrate 1 lower surface is provided with inverted T shape metal ground plate 5 and semicircle metal ground plate 6, and the bottom of semicircle metal ground plate 6 links to each other with the bottom of little belt substrate 1.
Described little belt substrate 1 is the FR4 material.The length of described little belt substrate 1 is 21mm～23mm, and wide is 21mm～23mm.The length of described radiation patch 2 is 20mm～22mm, and wide is 10mm～14mm.The height of described T-shaped fluting 3 is 4mm～8mm, and long is 12mm～15mm, and groove width is 1mm～3mm.Described impedance matching input microstrip line 4 adopts feed microstrip line to be connected with radiation patch 2, and characteristic impedance is 50 Ω.The width of described impedance matching input microstrip line 4 is 2mm～3mm.The length of described inverted T shape metal ground plate 5 is 8mm～10mm, and wide is 5mm～8mm, and live width is 1mm～3mm.The radius of described semicircle metallic plate ground plate 6 is 8mm～9mm.The spacing on the top of the bottom of described inverted T shape metal ground plate 5 and semicircle metallic plate ground plate 6 is 0.5mm～1mm.
Embodiment 1
T-shaped open flume type double-frequency micro-strip antenna:
Selecting dielectric constant is that 4.4 FR4 material is made little belt substrate, and thickness is 1 mm.The length of little belt substrate is 22.5mm, and wide is 22.5mm.The length of radiation patch is 21.5mm, and wide is 12mm.The height of T-shaped fluting is 5mm, and long is 14mm, and groove width is 1mm.Impedance matching input microstrip line adopts feed microstrip line to be connected with radiation patch, and characteristic impedance is 50 Ω.The width of impedance matching input microstrip line is 2mm.The length of inverted T shape metal ground plate is 8mm, and wide is 6mm, and live width is 2mm.The radius of semicircle metallic plate ground plate is 8.5mm.The spacing on the top of the bottom of inverted T shape metal ground plate and semicircle metallic plate ground plate is 0.5mm.Use software the radiation characteristics such as the insertion loss curve of T-shaped open flume type double-frequency micro-strip antenna and gain to be carried out insertion loss curve such as Fig. 3 of the T-shaped open flume type double-frequency micro-strip antenna of simulated measurement gained.As seen from Figure 3, in 3.7 ~ 5.2GHz, 6.58 ~ 9.2 GHz scopes insertion loss less than-10dB.Fig. 4-Figure 5 shows that respectively antenna pattern and antenna pattern when 4.3GHz, 8GHz of T-shaped open flume type double-frequency micro-strip antenna, gain when frequency is 4.3GHz is 2.7dBi, the half power lobe width is 84.3 °, gain when frequency is 8GHz is 2.9dBi, and the half power lobe width is 63.9 °.
Claims (10)
1. the coplanar double-frequency micro-strip antenna of T-shaped open flume type is characterized in that comprising little belt substrate (1), radiation patch (2), impedance matching input microstrip line (4), inverted T shape metal ground plate (5) and semicircle metal ground plate (6); Little belt substrate (1) upper surface is provided with radiation patch (2), impedance matching input microstrip line (4), be provided with T-shaped fluting (3) apart from radiation patch (2) top 4.5mm～5.5mm place, radiation patch (2) bottom links to each other with impedance matching input microstrip line (4) one ends, and the other end of impedance matching input microstrip line (4) links to each other with the bottom of little belt substrate (1); Little belt substrate (1) lower surface is provided with inverted T shape metal ground plate (5) and semicircle metal ground plate (6), and the bottom of semicircle metal ground plate (6) links to each other with the bottom of little belt substrate (1).
2. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1 is characterized in that described little belt substrate (1) is the FR4 material.
3. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1, the length that it is characterized in that described little belt substrate (1) is 21mm～23mm, wide is 21mm～23mm.
4. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1, the length that it is characterized in that described radiation patch (2) is 20mm～22mm, wide is 10mm～14mm.
5. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1, the height that it is characterized in that described T-shaped fluting (3) is 4mm～8mm, longly is 12mm～15mm, groove width is 1mm～3mm.
6. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1 is characterized in that described impedance matching input microstrip line (4) and radiation patch (2) adopt feed microstrip line to be connected, and characteristic impedance is 50 Ω.
7. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1 is characterized in that the width of described impedance matching input microstrip line (4) is 2mm～3mm.
8. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1, the length that it is characterized in that described inverted T shape metal ground plate (5) is 8mm～10mm, and wide is 5mm～8mm, and live width is 1mm～3mm.
9. a kind of T-shaped open flume type double-frequency micro-strip antenna as claimed in claim 1, the radius that it is characterized in that described semicircle metallic plate ground plate (6) is 8mm～9mm.
10. the coplanar double-frequency micro-strip antenna of a kind of T-shaped open flume type as claimed in claim 1 is characterized in that the spacing on the top of the bottom of described inverted T shape metal ground plate (5) and semicircle metallic plate ground plate (6) is 0.5mm～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202524879U CN202797290U (en) | 2012-05-31 | 2012-05-31 | T-shaped slot-type coplanar double-frequency microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202524879U CN202797290U (en) | 2012-05-31 | 2012-05-31 | T-shaped slot-type coplanar double-frequency microstrip antenna |
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| Publication Number | Publication Date |
|---|---|
| CN202797290U true CN202797290U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202524879U Expired - Fee Related CN202797290U (en) | 2012-05-31 | 2012-05-31 | T-shaped slot-type coplanar double-frequency microstrip antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108598694A (en) * | 2018-04-13 | 2018-09-28 | 吉林大学 | A kind of broadband narrow slot antenna with harmonics restraint effect by feed microstrip line |
| CN109742560A (en) * | 2018-12-29 | 2019-05-10 | 深圳Tcl新技术有限公司 | Directional gain antenna |
-
2012
- 2012-05-31 CN CN2012202524879U patent/CN202797290U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108598694A (en) * | 2018-04-13 | 2018-09-28 | 吉林大学 | A kind of broadband narrow slot antenna with harmonics restraint effect by feed microstrip line |
| CN109742560A (en) * | 2018-12-29 | 2019-05-10 | 深圳Tcl新技术有限公司 | Directional gain antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130531 |