CN209232959U - A kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback - Google Patents
A kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback Download PDFInfo
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- CN209232959U CN209232959U CN201920141073.0U CN201920141073U CN209232959U CN 209232959 U CN209232959 U CN 209232959U CN 201920141073 U CN201920141073 U CN 201920141073U CN 209232959 U CN209232959 U CN 209232959U
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Abstract
The utility model discloses a kind of small wide frequency of coplanar wave guide feedback band three-frequency antennas, including medium substrate, radiating element, microstrip feed line, left ground plane and right ground plane；Radiating element, microstrip feed line, left ground plane and right ground plane are printed in medium substrate one side；The single internal big U-lag for being provided with a small U-lag that Open Side Down and an opening upwards of radiation；Big U-lag wraps up small U-lag, and big U-lag is not connected to small U-lag；The upper left corner of left ground plane cuts a rectangle one and the upper right corner cuts a right angled triangle one；The upper left corner of right ground plane cuts a right angled triangle two and the upper right corner cuts a rectangle two.Two U-lags are opened on radiating element, produce two working bands, and two corner cut structures are then loaded on ground plane, the centre frequency for not only having tuned antenna reduces its reflection coefficient, also increases a bandwidth of operation, antenna is set to possess the bandwidth of operation of a variety of frequency bands, small in size, good directionality.
Description
Technical field
The utility model belongs to wireless communication technology field, three frequency of small wide frequency band of specifically a kind of coplanar wave guide feedback
Antenna.
Background technique
With the high speed development of wireless communication system, people are higher and higher to the performance requirement of wireless communication system, as
Higher requirements are also raised in performance for the antenna of one of communication system main element, one of them is exactly to require antenna can
Adapt to the bandwidth of a variety of different communication protocols, such as PCS Personal Communications System (PCS), WLAN (WLAN), global-intercommunication are micro-
Wave accesses (WiMAX) etc..Microstrip antenna can preferably meet can support while structure is simple, small in size, performance is good
The requirement of multiple frequency range is an important directions of current antenna research.On the basis of microstrip antenna, we can be by altogether
The mode of face waveguide feed carries out transformation and optimization in performance to antenna, can work in a variety of different frequency ranges.
In recent years, slot antenna is in WLAN/WiMAX using more and more extensive.Currently in order to realizing multiband antenna, lead to
Coplanar wave guide feedback monopole slot antenna can be often used, this antenna performance is good, and it is small in size, it is easy of integration.Application No. is
The document of 201610065150.X discloses a kind of coplanar wave guide feedback three-frequency antenna applied to WLAN/WiMAX, by
4 pairs of symmetrical small rectangular apertures are loaded inside rectangular radiation patch, although realizing the characteristic of three frequencies, its size is big,
It is not easy of integration；Frequency band is relatively narrow, and process is also easy to produce error, is easy so that antenna operating band generation offset, prevents it from covering
Frequency band needed for lid；And just for the transformation that radiation patch carries out.
Utility model content
In view of the deficiencies of the prior art, the technical issues of the utility model intends to solve is to provide a kind of coplanar wave guide feedback
Small wide frequency band three-frequency antenna.
The technical solution that the utility model solves the technical problem is to provide a kind of small wide frequency of coplanar wave guide feedback
Band three-frequency antenna, it is characterised in that the antenna includes medium substrate, radiating element, microstrip feed line, left ground plane and right ground plane；
Radiating element, microstrip feed line, left ground plane and right ground plane are printed in the medium substrate one side；The radiating element and micro-
Ribbon feeder connection；Microstrip feed line is connect with medium substrate bottom edge；Left ground plane is not connected to radiating element and microstrip feed line, right
Ground plane is not connected to radiating element and microstrip feed line；Microstrip feed line, left ground plane and right ground plane are respectively positioned on radiating element
Lower section；Left ground plane and right ground plane are located at the microstrip feed line left and right sides, left ground plane and right ground plane and microstrip feed line
Distance it is identical；
The big U-lag of a small U-lag that Open Side Down and an opening upwards is provided with inside the radiating element；Big U
Shape slot wraps up small U-lag, and big U-lag is not connected to small U-lag；The upper left corner of left ground plane cuts a rectangle one and the upper right corner
Cut a right angled triangle one；The upper left corner of right ground plane cuts a right angled triangle two and the upper right corner cuts a rectangle
Two.
Compared with prior art, the utility model beneficial effect is:
1, by the way of coplanar wave guide feedback, co-planar waveguide ground plane is located on the same floor this antenna with signal wire, is easy
Realization is connected in series or in parallel with other devices, without punching on substrate, is significantly reduced the thickness of antenna, is made
The volume of antenna further decreases, and realizes miniaturization.
2, two U-lags are opened on radiating element, produce two working bands, are then loaded two on ground plane and are cut
Corner structure has not only tuned the centre frequency of antenna, reduces its reflection coefficient, also increases a bandwidth of operation for antenna,
Antenna is set to possess the bandwidth of operation of a variety of frequency bands.
3, working band is more, and working band meets the multifrequency of 2.2~2.8GHZ, 3.3~4.0GHz, 4.9~7.1GHz
Band characteristic, all has omnidirectional radiation characteristic, good directionality in its working band.
4, working band is wide, the working band of antenna not only cover WLAN 3 frequency ranges (2.4~2.484GHz,
5.15~5.25GHz, 5.725~5.825GHz) and WiMAX 3 frequency ranges (2.5~2.69GHz, 3.4~3.69GHz,
5.25~5.85GHz), more frequencies nearby are also covered on this basis, even if this makes antenna, processing generates error, makes
It obtains working band and generates offset, can also cover the frequency range of WiMAX and WLAN well, maintain the integrality of signal.
5, this antenna has small in size, and structure is simple, and low manufacture cost, working band is more, and working band is wide, good directionality
The advantages that.
Detailed description of the invention
Fig. 1 is a kind of positive structure schematic of embodiment of the utility model.(in figure: 1, medium substrate；2, radiation is single
Member；3, microstrip feed line；4, left ground plane；5, right ground plane；21, small U-lag；22, big U-lag；42, rectangle one；41, right angle
Triangle one；51, right angled triangle two；52, rectangle two；)
Fig. 2 is the reflection coefficient chart of the antenna of the utility model embodiment 1.
Fig. 3 is the voltage standing wave ratio curve graph of the antenna of the utility model embodiment 1.
Fig. 4 is the antenna pattern of the antenna in 2.5GHz of the utility model embodiment 1.
Fig. 5 is the antenna pattern of the antenna in 3.5GHz of the utility model embodiment 1.
Fig. 6 is the antenna pattern of the antenna in 5.5GHz of the utility model embodiment 1.
Specific embodiment
Specific embodiment of the utility model is given below.Specific embodiment is only used for being further described originally practical new
Type does not limit the protection scope of the claim of this application.
The utility model provides a kind of small wide frequency band three-frequency antenna (the abbreviation antenna, referring to figure of coplanar wave guide feedback
1), it is characterised in that the antenna includes medium substrate 1, radiating element 2, microstrip feed line 3, left ground plane 4 and right ground plane 5；Institute
It states and is printed with radiating element 2, microstrip feed line 3, left ground plane 4 and right ground plane 5 in 1 one side of medium substrate；The radiating element 2
It is connected with microstrip feed line 3；Microstrip feed line 3 is connect with 1 bottom edge of medium substrate；Left ground plane 4 and radiating element 2 and microstrip feed line 3
It is not connected to, right ground plane 5 is not connected to radiating element 2 and microstrip feed line 3；Microstrip feed line 3, left ground plane 4 and right ground connection
Face 5 is respectively positioned on 2 lower section of radiating element；Left ground plane 4 and right ground plane 5 are located at 3 left and right sides of microstrip feed line, left ground connection
Face 4 and right ground plane 5 are identical at a distance from microstrip feed line 3；
The radiating element 2 is rectangular patch, and inside is provided with the small U-lag 21 that Open Side Down and an opening upwards
Big U-lag 22；Big U-lag 22 wraps up small U-lag 21, and big U-lag 22 is not connected to small U shape slot 21；The left ground plane 4
It is rectangular patch with right ground plane 5；The upper left corner of left ground plane 4 cuts a rectangle 1 and the upper right corner cuts a right angle
Triangle 1；The upper left corner of right ground plane 5 cuts a right angled triangle 2 51 and the upper right corner cuts a rectangle 2 52；
Preferably, the central axes of small U-lag 21 are conllinear with the central axes of radiating element 2；The central axes of big U-lag 22 and spoke
The central axes for penetrating unit 2 are conllinear；
Preferably, the central axes of radiating element 2, the central axes of microstrip feed line 3 are conllinear with the central axes of medium substrate 1.
Preferably, the shape of small U-lag 21 removes a bottom edge for rectangle annular groove, then in each horizontal connection in U-shaped opening end
One small rectangular channel adjusts the reflection coefficient of antenna for increasing current path.
Preferably, the base width of big U-lag 22 is greater than the width on other sides.
Preferably, rectangle 1 is identical as rectangle 2 52；Right angled triangle 1 is identical as right angled triangle 2 51；It is left
Ground plane 4 and right ground plane 5 are about 3 bilateral symmetry of microstrip feed line.
Preferably, the medium substrate 1 use relative dielectric constant for 4.4 glass-epoxy copper-clad plate (FR-
4)。
Preferably, the radiating element 2, microstrip feed line 3, left ground plane 4 and right ground plane 5 are rectangular metal patch.
Embodiment 1
In the present embodiment the shape of medium substrate 1 be rectangle, use relative dielectric constant for 4.4 FR-4, medium substrate 1
Size be 18mm × 23mm × 1.6mm.
The radiating element 2 is rectangle, and size is 16mm × 13.4mm, top margin of the radiating element 2 apart from medium substrate 1
For 1.1mm, the left side edge apart from medium substrate 1 is 1mm.
The big U-lag of a small U-lag 21 that Open Side Down and an opening upwards is provided with inside the radiating element 2
22；Big U-lag 22 wraps up small U-lag 21, and big U-lag 22 is not connected to small U-lag 21；The central axes of small U-lag 21 and radiation
The central axes of unit 2 are conllinear；The central axes of big U-lag 22 are conllinear with the central axes of radiating element 2；The central axes of radiating element 2,
The central axes of microstrip feed line 3 are conllinear with the central axes of medium substrate 1.
Big U-lag 22 is made of 3 rectangles, and small U-lag 21 is made of 5 rectangles, the square of big 22 horizontal direction of U-lag
The width of shape is 0.5-3mm (the present embodiment 2.5mm), and the width of remaining 7 rectangle is that (the present embodiment is 0.5-0.9mm
0.8mm).The horizontal length of big U-lag 22 is 11.6mm, and vertical length 11.5mm, big U-lag 22 is apart from radiating element 2
Top margin is 0.9mm, and the left side edge apart from radiating element 2 is 2.2mm.The horizontal length of small U-lag 21 is 8.2mm, vertical long
Degree is 8.3mm, and the distance of two small rectangles of small 21 opening of U-lag is 4.6mm, and small U-lag 21 is apart from radiating element 2
Top margin is 0.9mm, and the left side edge apart from radiating element 2 is 3.9mm.
The length and width dimensions of the microstrip feed line 3 are 3mm × 8.5mm.
The left ground plane 4 and right ground plane 5 for by the rectangle of 8mm × 7mm cut respectively a right angled triangle and
One rectangle is constituted.Rectangle 1 is identical as rectangle 2 52；Right angled triangle 1 is identical as right angled triangle 2 51；Left ground connection
Face 4 and right ground plane 5 are about 3 bilateral symmetry of microstrip feed line.The level right angle edge lengths of right angled triangle are 4mm, vertical right angle
Edge lengths are 1.5-4.5mm (the present embodiment 3.2mm).The length and width dimensions for the rectangle cut are 3mm × (2-6mm, this implementation
Example is 4.9mm).Left ground plane 4 and right ground plane 5 are 0.5mm at a distance from radiating element 2, left ground plane 4 and right ground plane
5 at a distance from microstrip feed line 3 be 0.5mm.
Fig. 2 be the present embodiment antenna reflection coefficient curve, as can be seen from Figure 2 antenna 2.15~2.8GHz,
Reflection coefficient in 3.32~4.0GHz, 4.9~7.1GHz frequency range is less than -10dB, this enable antenna work 2.15~
2.8GHz, 3.32~4.0GHz, in 4.9~7.1GHz frequency range, can cover WLAN (WLAN) 2.4~2.484GHz,
5.15~5.25GHz, 5.725~5.825GHz, tri- frequency ranges and worldwide interoperability for microwave accesses (WiMAX) 2.5~2.69GHz,
3.4~3.69GHz, 5.25~5.85GHz, tri- frequency ranges.
Fig. 3 be the present embodiment antenna voltage standing wave ratio curve, as can be seen from the figure above-mentioned reflection coefficient be less than-
The voltage standing wave ratio of the frequency range internal antenna of 10dB is respectively less than 2, meets engine request.
Fig. 4, Fig. 5 and Fig. 6 are respectively the present embodiment antenna corresponding antenna in 2.5GHz, 3.5GHz and 5.5GHz
Antenna pattern, E is electric field in figure, and H is magnetic field, and as can be seen from the figure the radiation pattern of the present embodiment is approximately even
Extremely sub- antenna pattern, this shows that the antenna has good radiation characteristic.Under above three frequency, which is shown
Preferable directionality, meets engine request.
The utility model does not address place and is suitable for the prior art.
Claims (8)
1. a kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback, it is characterised in that the antenna includes medium substrate, radiation
Unit, microstrip feed line, left ground plane and right ground plane；Radiating element, microstrip feed line, a left side are printed in the medium substrate one side
Ground plane and right ground plane；The radiating element is connected with microstrip feed line；Microstrip feed line is connect with medium substrate bottom edge；Left ground connection
Face is not connected to radiating element and microstrip feed line, and right ground plane is not connected to radiating element and microstrip feed line；Microstrip feed line,
Left ground plane and right ground plane are respectively positioned below radiating element；Left ground plane and right ground plane are located at microstrip feed line or so two
Side, left ground plane and right ground plane are identical at a distance from microstrip feed line；
The big U-lag of a small U-lag that Open Side Down and an opening upwards is provided with inside the radiating element；Big U-lag
Small U-lag is wrapped up, big U-lag is not connected to small U-lag；The upper left corner of left ground plane cuts a rectangle one and the upper right corner is cut
One right angled triangle one；The upper left corner of right ground plane cuts a right angled triangle two and the upper right corner cuts a rectangle two.
2. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that small U-lag
Central axes are conllinear with the central axes of radiating element；The central axes of big U-lag are conllinear with the central axes of radiating element.
3. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that radiating element
Central axes, the central axes of microstrip feed line it is conllinear with the central axes of medium substrate.
4. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that small U-lag
Shape removes a bottom edge for rectangle annular groove, then in one small rectangular channel of each horizontal connection in U-shaped opening end.
5. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that big U-lag
Base width is greater than the width on other sides.
6. coplanar wave guide feedback according to claim 1 small wide frequency band three-frequency antenna, it is characterised in that rectangle one with
Rectangle two is identical；Right angled triangle one is identical as right angled triangle two；Left ground plane and right ground plane are about microstrip feed line or so
Symmetrically.
7. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that the medium
Substrate use relative dielectric constant for 4.4 glass-epoxy copper-clad plate.
8. the small wide frequency band three-frequency antenna of coplanar wave guide feedback according to claim 1, it is characterised in that the radiation
Unit, microstrip feed line, left ground plane and right ground plane are rectangular metal patch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920141073.0U CN209232959U (en) | 2019-01-28 | 2019-01-28 | A kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920141073.0U CN209232959U (en) | 2019-01-28 | 2019-01-28 | A kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209232959U true CN209232959U (en) | 2019-08-09 |
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ID=67510935
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920141073.0U Active CN209232959U (en) | 2019-01-28 | 2019-01-28 | A kind of small wide frequency band three-frequency antenna of coplanar wave guide feedback |
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| Country | Link |
|---|---|
| CN (1) | CN209232959U (en) |
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2019
- 2019-01-28 CN CN201920141073.0U patent/CN209232959U/en active Active
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