CN207967307U - A kind of small-sized Big Dipper B1 band microstrip center-fed antenna - Google Patents
A kind of small-sized Big Dipper B1 band microstrip center-fed antenna Download PDFInfo
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- CN207967307U CN207967307U CN201820460629.8U CN201820460629U CN207967307U CN 207967307 U CN207967307 U CN 207967307U CN 201820460629 U CN201820460629 U CN 201820460629U CN 207967307 U CN207967307 U CN 207967307U
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- center
- radiation unit
- corner cut
- ground plane
- medium substrate
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Abstract
A kind of small-sized Big Dipper B1 band microstrip center-fed antenna, including：Metal radiation unit, medium substrate, ground plane, feed port and probe；Metal radiation unit is mounted on the upper surface of medium substrate, ground plane is mounted on the lower surface of medium substrate, feed port is mounted on the lower surface of ground plane, distributing point is offered in metal radiation unit, medium substrate and ground plane, probe is connected by feed port with metal radiation unit, and probe feed circuit is formed；Metal radiation unit includes corner cut square-shaped metal patch, U-shaped resonant slots are offered in the middle part of corner cut square-shaped metal patch, the center of U-shaped resonant slots is consistent with the center of corner cut square-shaped metal patch, and probe is located at the center of corner cut square-shaped metal patch.The Bl frequency ranges of dipper system can be completely covered in the utility model, and simple in structure, return loss is low, Yi Zuzhen, and due to introducing apex drive structure so that the antenna obtains low cross polarization and wide axis compares beam angle.
Description
Technical field
The utility model belongs to wireless communication field, and in particular to a kind of small-sized Big Dipper B1 band microstrip center-fed antenna.
Background technology
Antenna is very important component part in radio communication system terminal, it can believe the simulation in wireless device
Number, circuit signal be converted in electromagenetic wave radiation to free surrounding space, the quality of performance directly affects communication quality and performance.
Microstrip antenna have it is small, it is light-weight, the advantages that low section, in the past few decades in circular polarization microstrip antenna it is logical in satellite
Letter and mobile communication field have obtained extensive concern and application.
The BDStar navigation system of our countries is quickly grown these years, it is therefore desirable to high performance navigation satellite signal
Receiver, the design of reception antenna is one of the most important part of whole system design, so the performance to antenna proposes
Higher requirement：Good right-handed circular polarization, low section, miniaturization, good propagation characteristic etc..Meanwhile being met
It is required that circular polarization characteristics under to broaden its impedance bandwidth as far as possible, improve low elevation gain.
Degenerate mode separative element is added by corner cut so that the resonant frequency of degeneracy orthogonal mode generates separation, relative to
Working frequency points, advanced 45 ° of one phase of equiva lent impedance of two resonant frequencies, one lags 45 °, therefore obtains polarization direction just
It hands over, amplitude is equal, the line polarization wave that 90 ° of phase difference.Material is thus formed circular polarization radiations.Other than increase resonant frequency,
Broader bandwidth can be obtained by increasing corner cut.
The modeling of the corner cut square patch antenna of double-fed can overcome antenna standing wave bandwidth and axial ratio bandwidth is relatively narrow asks
Topic, but double-fed introduces feeding network so that and antenna is more complicated, and size is larger, and cost is also relatively high, complicated transmission network
Network can lead to some unnecessary coupling effects.And traditional single feedback corner cut square patch antenna uses the form of offset-fed, structure
Simply, and it is easy to make, is widely used, can also obtains preferable gain and wider axial ratio bandwidth.But offset-fed form
Under distributing point deviate patch center, the polarization signal and stray radiation of larger intersection can be introduced.
Utility model content
The utility model is directed to deficiency in the prior art, provides a kind of small-sized Big Dipper B1 band microstrip center-fed antenna.It should
Antenna uses apex drive structure, can reduce the stray radiation of antenna as far as possible, and apex drive structure can make
Antenna obtains preferable cross polarization and wider 3dB axis compares beam angle.By using the mode of fed by coaxial probe, come real
The matched well of existing antenna, and position of the coaxial inner conductor in radiation patch need to be only adjusted, effectively it can adjust and control
The input impedance of antenna processed.Under the same conditions, it is loaded by gap, increases the active path of electric current, so as to shorten antenna
Electrical length.
To achieve the above object, the utility model uses following technical scheme：
A kind of small-sized Big Dipper B1 band microstrip center-fed antenna, which is characterized in that including：Metal radiation unit, medium substrate,
Ground plane, feed port and probe；The metal radiation unit is mounted on the upper surface of medium substrate, and the ground plane is mounted on
The lower surface of medium substrate, the feed port are mounted on the lower surface of ground plane, metal radiation unit, medium substrate and ground connection
Distributing point is equipped in face, the probe is connected by feed port with metal radiation unit, and probe feed circuit is formed；Its
In, metal radiation unit includes corner cut square-shaped metal patch, and U-shaped is offered in the middle part of the corner cut square-shaped metal patch
The center of resonant slots, the U-shaped resonant slots is consistent with the center of corner cut square-shaped metal patch, and probe is located at corner cut square
The center of metal patch.
To optimize above-mentioned technical proposal, the concrete measure taken further includes：
The material of the metal radiation unit is copper.
The corner cut square-shaped metal patch has cut away a pair in square diagonally, and the square length of side is 41.5mm,
Corner cut is the isosceles right triangle that the length of side is 5mm.
The inside of the U-shaped resonant slots is equipped with fillet.
The medium substrate uses relative dielectric constant for the F-R4 epoxy glass fibers at 4.4, loss tangent angle 0.002
Plate, a length of 50mm, width 50mm, thickness 3mm.
The ground plane is copper foil, long 50mm, wide 50mm.
The utility model has the beneficial effects that：
1, simple and compact for structure, compact, uses thickness for 3mm and cheap FR-4 epoxy glass fiber plates are made
For medium substrate, there are thinner thickness and lower cost of manufacture compared with the antenna of the prior art, be easy to extensive use；
2, Big Dipper B1 frequency ranges can be completely covered in its bandwidth of operation（1561.42 ± 2.048MHz）；
3, the antenna return loss is low, and wider 3dB axis is than wave beam bandwidth, Yi Zuzhen；
4, apex drive structure so that the antenna obtains preferable cross polarization and wide axis compares beam angle；
5, U-shaped resonant slots can effectively change the radial current distribution of radiation patch, keep script surface current maximum
The short-circuit condition that input impedance is zero is broken away from the geometric center close to short-circuit condition, to which feed probes can just be located at spoke
Penetrating patch center realizes the broad head-on radiation of patch as patch excitation；And U-shaped resonant slots are one about geometry
Centrosymmetric structure, so that entire patch is also full symmetric about geometric center, it is therefore provided that the apex drive micro-strip
Antenna realizes broad head-on radiation, to obtain preferable radiance.
Description of the drawings
Fig. 1 is the whole side view of the utility model.
Fig. 2 is the overall top view of the utility model.
Fig. 3 is the axial ratio bandwidth of the utility model.
Fig. 4 is the axis ratio characteristic curve graph in xoz face and yoz face of the utility model at 1.561GHz.
Fig. 5 is the return loss plot figure of the utility model.
Fig. 6 is directional diagram of the utility model at 1.561GHz frequency points.
Reference numeral is as follows：Metal radiation unit 1, corner cut square-shaped metal patch 1-1, U-shaped resonant slots 1-2, medium
Substrate 2, ground plane 3, feed port 4, probe 5.
Specific implementation mode
The utility model is described in further detail presently in connection with attached drawing.
Small-sized Big Dipper B1 band microstrip center-fed antenna as shown in Figure 1 and Figure 2, using apex drive mode, including metal spoke
Penetrate unit 1, medium substrate 2, ground plane 3, feed port 4 and probe 5.Metal radiation unit 1 is located at the upper table of medium substrate 2
Face, ground plane 3 are respectively positioned on the lower surface of medium substrate 2, and feed port 4 is mounted on the lower surface of ground plane 3, metal radiation unit
1, medium substrate 2, be equipped with distributing point on ground plane 3, probe 5 is connected by feed port 4 with metal radiation unit 1, is formed
Probe feed circuit.
Metal radiation unit 1 specifically includes corner cut square-shaped metal patch 1-1, square-shaped metal patch 1-1 and is equipped with U-shaped
The center of type resonant slots 1-2, U-shaped resonant slots 1-2 are consistent with the center of square-shaped metal patch 1-1.Metal radiation unit 1
Material is copper, and size is long 41.5mm, width 41.5mm, and corner cut is the isosceles right triangle that the length of side is 5mm.U-shaped resonant slots
The size of 1-2 is：Outer width a=12.8mm, upper high b=4mm, go to the bottom c=12.8mm, inner width d=6.4mm, inner circle radius r=2.4mm.
U-shaped resonant slots 1-2 can effectively change the radial current distribution of corner cut square-shaped metal patch 1-1, make original
This surface current is maximum and has broken away from the short-circuit condition that input impedance is zero close to the geometric center of short-circuit condition, is visited to feed
Needle 5 can just be located at the broad head-on radiation that radiation patch center realizes patch as patch excitation.And U-shaped resonant slots
It is one about geometric center symmetrical structure to 1-2, so that entire patch is also full symmetric about geometric center.So
So that the apex drive microstrip antenna realizes broad head-on radiation, preferable antenna pattern is obtained.It is removed by corner cut modeling
It can increase other than resonant frequency, can more obtain broader bandwidth.
The material of medium substrate 2 be relative dielectric constant 4.4, loss tangent angle 0.002 F-R4 epoxy glass fiber plates,
A length of 50mm, width 50mm, thickness 3mm.Ground plane 3 is copper foil, and size is long 50mm, width 50mm.
The antenna has simple structure, smaller volume, good radiance and lower cost of manufacture, except this it
Outer apex drive structure makes the antenna obtain preferable cross polarization and wider 3dB axis ratio beam angle and easy group
This important feature of battle array.
Fig. 3 is the axis of antenna than curve graph, which is less than 3dB in 1.551-1.564GHz frequency bands, and axial ratio bandwidth is
13MHz, minimum 1.535dB.It can be seen that the antenna has preferable Circular polarization ratio characteristic.
Fig. 4 is the axis ratio characteristic figure in xoz face and yoz face of the antenna at 1.561GHz, and axis is -50 ° than beam angle and arrives
50°。
Fig. 5 is the return loss simulation curve figure of antenna, and the working frequency range of the antenna is 1.53-1.59GHz, and bandwidth is
60MHz completely covers the B1 frequency ranges of dipper system（1561.42±2.048MHz）.
Fig. 6 is directional diagram of the antenna at 1.561GHz frequency points, and the solid-line curve with equilateral triangle is the xoz planes of antenna
（Phi=0deg）Antenna pattern, with up-side down triangle solid-line curve be yoz planes（phi=90deg）Antenna pattern,
Imaginary curve with square is the xoz planes of antenna（Phi=0deg）Antenna pattern, with circular imaginary curve be yoz
Plane（phi=90deg）Antenna pattern.
It can be seen that the antenna overcomes the deficiency of double-fed, and deviate the feed point discontinuity introducing at patch center
The Bl frequency ranges of dipper system can be completely covered in the problem of larger cross polarization level and stray radiation（1561.42±
2.048MHz）, and its is simple in structure, and return loss is low, Yi Zuzhen.Due to introducing apex drive structure so that the antenna
It obtains low cross polarization and wide axis compares beam angle.The U-shaped cutler feed structure that is open is full symmetric about patch center,
Its symmetrical cross polarization electric current, to which the radiation at far field is cancelled out each other as far as possible, may be implemented high performance with width reverse phase
Antenna pattern.
It should be noted that the use of such as "upper", "lower", "left", "right", "front", "rear" cited in utility model
Language is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness or
Adjustment, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the utility model.
Above are merely preferred embodiments of the utility model, the scope of protection of the utility model is not limited merely to above-mentioned
Embodiment, technical solution belonging to the idea of the present invention belong to the scope of protection of the utility model.It should be pointed out that pair
For those skilled in the art, several improvements and modifications without departing from the principle of the utility model,
It should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna, which is characterized in that including：Metal radiation unit（1）, medium substrate
（2）, ground plane（3）, feed port（4）And probe（5）；The metal radiation unit（1）Mounted on medium substrate（2）Upper table
Face, the ground plane（3）Mounted on medium substrate（2）Lower surface, the feed port（4）Mounted on ground plane（3）Under
Surface, metal radiation unit（1）, medium substrate（2）And ground plane（3）In be equipped with distributing point, the probe（5）Pass through feed
Port（4）With metal radiation unit（1）It is connected, forms probe feed circuit；Wherein, metal radiation unit（1）Just including corner cut
Square metal patch（1-1）, the corner cut square-shaped metal patch（1-1）Middle part offer U-shaped resonant slots（1-2）, institute
State U-shaped resonant slots（1-2）Center and corner cut square-shaped metal patch（1-1）Center it is consistent, probe（5）Just positioned at corner cut
Square metal patch（1-1）Center.
2. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna as described in claim 1, it is characterised in that：The metal radiation
Unit（1）Material be copper.
3. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna as described in claim 1, it is characterised in that：The corner cut is square
Shape metal patch（1-1）The a pair cut away in square is diagonal, and the square length of side is 41.5mm, and corner cut is that the length of side is 5mm
Isosceles right triangle.
4. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna as described in claim 1, it is characterised in that：The U-shaped is humorous
Shake slot（1-2）Inside be equipped with fillet.
5. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna as described in claim 1, it is characterised in that：The medium substrate
（2）Use relative dielectric constant for the F-R4 epoxy glass fiber plates at 4.4, loss tangent angle 0.002, a length of 50mm, width is
50mm, thickness 3mm.
6. a kind of small-sized Big Dipper B1 band microstrip center-fed antenna as described in claim 1, it is characterised in that：The ground plane
（3）For copper foil, long 50mm, wide 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460629.8U CN207967307U (en) | 2018-04-03 | 2018-04-03 | A kind of small-sized Big Dipper B1 band microstrip center-fed antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460629.8U CN207967307U (en) | 2018-04-03 | 2018-04-03 | A kind of small-sized Big Dipper B1 band microstrip center-fed antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207967307U true CN207967307U (en) | 2018-10-12 |
Family
ID=63726910
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820460629.8U Expired - Fee Related CN207967307U (en) | 2018-04-03 | 2018-04-03 | A kind of small-sized Big Dipper B1 band microstrip center-fed antenna |
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| CN (1) | CN207967307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336492A (en) * | 2018-04-03 | 2018-07-27 | 南京信息工程大学 | A kind of small-sized Big Dipper B1 band microstrip center-fed antenna |
-
2018
- 2018-04-03 CN CN201820460629.8U patent/CN207967307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336492A (en) * | 2018-04-03 | 2018-07-27 | 南京信息工程大学 | A kind of small-sized Big Dipper B1 band microstrip center-fed antenna |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 Termination date: 20200403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |