CN2727986Y - Broadband microstrip base station array antenna - Google Patents
Broadband microstrip base station array antenna Download PDFInfo
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- CN2727986Y CN2727986Y CN 200420085883 CN200420085883U CN2727986Y CN 2727986 Y CN2727986 Y CN 2727986Y CN 200420085883 CN200420085883 CN 200420085883 CN 200420085883 U CN200420085883 U CN 200420085883U CN 2727986 Y CN2727986 Y CN 2727986Y
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- antenna
- base station
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- shaped
- microstrip
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Abstract
The utility model discloses a broadband microstrip base station array antenna used for adapting the bandwidth requirement of various radio communication services. The array antenna is composed of a plurality of antenna units vertically fixed on a U-shaped ground plate. Each antenna unit 1 adopts a printing plane rectangular ring integral structure. One face of the rectangular ring 2 is provided with a bandwidth explorer 11 and a core thread 14 of a microstrip line 6, and an n shape 12 and a T shape 13 are connected in series to form the bandwidth explorer 11. The other face is provided with a metal ring 9 which is in a shape like the Chinese character 'hui'. The metal ring 9 which is in a shape like the Chinese character 'hui' is actuated by the explorer 11. The upper part of the rectangular ring 2 is fixed with a parasitic patch 3. An outer conductor of the microstrip line 6 is collinear with the metal ring 9 which is in a shape like the Chinese character 'hui'. The output terminal of the core thread 14 of the microstrip line is connected wit a T-shaped explorer 16. The input terminal 17 is connected with an inner conductor 18 of a coaxial line 4. The utility model can be used as a moderate gain or high gain plate-shaped antenna with the band of frequency of from 1710 MHz to 2170 MHz, and the use of multi-business, such as DCS, PCS, and TD-CDMA can be simultaneously satisfied.
Description
Technical field
The utility model relates to antenna technical field, and specifically a kind of wideband microstrip base station array antenna uses as the antenna for base station in the mobile communication.
Background technology
Along with developing rapidly of mobile communication, the message volume that the user need carry out is more and more, thereby, the broadband character as the antenna for base station of mobile communication important component part is had higher requirement.At present, various microstrip antennas with wideband dipole, band parasitic patch, the high-gain antenna for base station that constitutes as elementary cell as actinal surface coupled patch etc., bandwidth can only cover 824～960MHz frequency range or high-end 1710～1990MHz frequency range of GSM and CDMA low side, and its relative bandwidth has only 15%.Because frequency range is that 1920～2170MHz third generation radio communication service will be soon open-minded, this just wishes that antenna for base station has wideer bandwidth, not only the user of 1850～1990MHz frequency range of 1710～1880MHz frequency range of suitable current digital communication system DCS, Personal Communications Services PCS uses, and to be fit to of the user use of TD-CDMA frequency range at 1920～2170MHz, its relative bandwidth is 24%.So develop wide band base station array antenna is to adapt to the urgent need that wideband communications service is carried out.
The content of utility model
The purpose of this utility model is to overcome the narrow problem of above-mentioned existing antenna frequency band, provides a kind of wideband microstrip high-gain base station array antenna, to adapt to the bandwidth requirement of multiple radio communication service.
The technical scheme that realizes the purpose of this utility model is to adopt a plurality of broadband radiations unit is installed in forming array antenna for base station on the U-shaped ground plate.Each broadband radiation unit adopts by the printing planar rectangular ring of band parasitic patch with the broadband probe excitation and constitutes.Described printing planar rectangular ring adopts two-sided epoxy copper-clad plate, and one side is the broadband probe that is in series by ∏ shape and T shape and the heart yearn of microstrip line, and another side is three-back-shaped quoit; Parasitic patch is fixed on the top of straight-flanked ring, and the below of straight-flanked ring is connected on the U-shaped ground plate by coaxial line.
The outer conductor of described microstrip line and three-back-shaped quoit conllinear, the output of microstrip line heart yearn links to each other with T type probe, and the input of microstrip line heart yearn links to each other with the inner wire of coaxial line.
The utility model constitutes the wide band high-gain antenna array owing to adopt two-sided epoxy copper-clad plate printed circuit to make printing planar rectangular ring, solved the low-cost inefficient production difficult problem of plate antenna, in the broad frequency range of (1710～2170) MHz24%, realized the wide band high-gain plate antenna; Because the utility model adopts the broadband probe structure excitation printing planar rectangular ring that is in series by ∏ shape and T shape, have the reactance compensation characteristic simultaneously, make the impedance bandwidth of its antenna wideer; Because the utility model adopts above active planar rectangular ring, added a parasitic patch in addition, further the bandwidth of broadening antenna is adjusted the size of parasitic patch and the distance of active relatively paster, makes bandwidth the best.Through measuring, promptly in 24% the relative bandwidth, the electric property of antenna has broadband character in (1710～2170) MHz frequency range, wherein, and standing-wave ratio VSWR≤1.5; Horizontal direction HPBW
H=65 °; Vertical direction HPBW
L=7.8 ° ± 0.5 °; Front and back are than F/B 〉=36dB.Being adapted at 1710～1880MHz frequency range of DCS, 1850～1990MHz frequency range of PCS, 1920～2170MHz frequency range of TD-CDMA uses as the base station plate antenna.
Description of drawings
Fig. 1 is cross-sectional structure figure of the present utility model
Fig. 2 is the utility model printing planar rectangular ring structure schematic diagram
Fig. 3 is the utility model coaxial cable and microstrip line connection layout
Fig. 4 is the overall structure figure of the utility model embodiment
Fig. 5 is actual measurement VSWR of the present utility model～f performance diagram
Fig. 6 is the actual measurement elevation radiation patytern of the utility model embodiment at f=1710MHz
Fig. 7 is the actual measurement elevation radiation patytern of the utility model embodiment at f=1940MHz
Fig. 8 is the actual measurement elevation radiation patytern of the utility model embodiment at f=2170MHz
Fig. 9 is the measured level face directional diagram of the utility model embodiment at f=1710MHz
Figure 10 is the measured level face directional diagram of the utility model embodiment at f=1940MHz
Figure 11 is the measured level face directional diagram of the utility model embodiment at f=2170MHz
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to Fig. 1, the utility model broadband microstrip antenna 1 is made up of printing planar rectangular ring 2, parasitic patch 3, microstrip feed line 6, coaxial feeder 4 and the U type ground plate 5 of broadband probe excitation.Parasitic patch 3 is by thickness h
1=1mm the left and right sides length of side is that the square aluminium sheet of a is formed, and with insulating rod 7 parasitic patch 3 is supported on the planar rectangular ring 2, and the length of side a that adjusts parasitic patch 3 reaches the distance H of planar rectangular ring
1, H
2, h
2The function that widening frequency band is not only arranged, and can increase antenna gain.The characteristic impedance of microstrip line 6 is 50 Ω, and the characteristic impedance of coaxial line 4 also is 50 Ω, and coaxial line 4 links to each other with microstrip line 6 and both makes to print the feeder line of planar rectangular loop antenna 2, plays the effect of supporting plane straight-flanked ring antenna 2 again.This U-shaped ground plate is to be the metallic plate 23 of D and to be with two height be H by the broadband
3Side 24 constitute.The effect of U-shaped ground plate is that the bidirectional radiation that becomes printing straight-flanked ring antenna 2 is one-way radiation, and antenna gain is increased.By the width D of change U-shaped ground plate and the height H of side
3, the horizontal plane beamwidth of may command antenna makes it reach the desired width in base station, for example is 65 °, 90 ° etc., allows D=0.9 λ
0, H
3=0.258 λ
0, in 1710～2170MHz frequency range, can realize 65 ° ± 6 ° horizontal plane beamwidth.
With reference to Fig. 2 and Fig. 3, printing planar rectangular ring (2) is to use thickness h
2=2mm size is L
1* L
2Low-cost two-sided epoxy copper-clad plate (8), process with printed circuit technique.What draw oblique line among the figure is exactly three-back-shaped quoit 9, and it is the one side in two-sided epoxy copper-clad plate, the back side for example, and the centre erodes away size and is L
3* L
1Slit 10 form.Another side, for example positive, erode away the broadband probe 11 that the planar rectangular ring is printed in excitation.This broadband probe is in series by ∏ type probe 12 and T type probe 13, has the reactance compensation function, plays key effect in broadening antenna impedance bandwidth.The heart yearn 14 of microstrip feed line 6 also is positioned at the front of double face copper, its live width W
fForm with 11 corrosion processing of broadband probe.The output of this microstrip feed line heart yearn 14 links to each other with T type probe 16, and input 17 links to each other with the inner wire 18 of coaxial feeder 4, is positioned at the ground wire 15 of the three-back-shaped quoit 9 double as microstrip lines 6 at double face copper 8 back sides.The outer conductor 19 of coaxial feeder 4 20 links to each other with three-back-shaped quoit 9 in the junction, and another termination coaxial socket 22 of coaxial line 4 or feeder line link to each other, and link to each other with the feeder line of adjacent cells during the group battle array.Three-back-shaped quoit 9 width W in printing plane are about 0.13 λ
0(λ
0Be the central task wavelength).The planar rectangular ring of broadband probe excitation is from the height H of U-shaped ground plate 5
2Also be about 0.13 λ
0Not only the flatten bidirectional radiation of face straight-flanked ring antenna of U type ground plate 5 is an one-way radiation, and has improved the gain of antenna.U type ground plate 5 is the flat metal plate 23 of D by inner width and is H highly
3Two sides 24 form, adjust the width D and the side height H of U type ground plate 5
3, can also control the horizontal plane half-power beam width of the plate antenna that constitutes by printing planar rectangular ring 2, to satisfy the desired width in base station, as HPBW
H=65 °; HPBW
H=90 °; HPBW
H=120 °.For example, D=0.9 λ
0, H
3=0.258 λ
0Just can make the horizontal H PBW of antenna array
H=65 °; In order to improve the gain of plate antenna, only the printing planar rectangular ring 2 that need encourage the band parasitic patch 3 usefulness broadband probes 11 that the utility model provides in vertical plane group battle array, just can be made the wideband microstrip base station array antenna as elementary cell.
With reference to Fig. 4, embodiment of the present utility model is the array antenna that has the little band radiating element composition of planar rectangular ring of parasitic patch with 8.8 radiating elements are vertically mounted on the U-shaped ground plate 5, the spacing d=0.9 λ between the radiating element
0, equidistantly arrange.Adjust the width of U-shaped ground plate and the height of side, the horizontal plane beamwidth of may command antenna.Be the performance of checking present embodiment, the spy makes following experimental test:
Experimental test 1
Voltage standing wave ratio frequency characteristics to present embodiment is tested, result such as Fig. 5.As seen from Figure 5, in the frequency range of 1710～2170MHz, VSWR≤1.45.
To the vertical plane of present embodiment and horizontal radiation pattern respectively at basic, normal, high three frequencies, i.e. f
L=1710MHz, f
0=1940MHz; f
h=2170MHz tests, and its curve is respectively as Fig. 6～Fig. 8, Fig. 9～Figure 11.
Fig. 6 shows that present embodiment is at f
L=1710MHz Frequency point elevation radiation patytern, its 3db lobe width is 7.7 °, front and back are than being-32.02db.
Fig. 7 shows that present embodiment is at f
LThe elevation radiation patytern of=1940MHz Frequency point, its 3db lobe width is 6.6 °, front and back are than being-36.50db.
Fig. 8 shows that present embodiment is at f
LThe elevation radiation patytern of=2170MHz Frequency point, its 3db lobe width is 6 °, front and back are than being-35.48db.
Fig. 9 shows that present embodiment is at f
LThe horizontal radiation pattern of=1710MHz Frequency point, its 3db lobe width is 66.7 °, front and back are than being-28.14db.
Figure 10 shows that present embodiment is at f
LThe horizontal radiation pattern of=1940MHz Frequency point, its 3db lobe width is 62 °, front and back are than being-30.65db.
Figure 11 shows that present embodiment is at f
LThe horizontal radiation pattern of=2170MHz Frequency point, its 3db lobe width is 59 °, front and back are than being-31.77db.
Half-power beam width and the front and back that can obtain antenna from these directional diagrams respectively are more as shown in the table respectively than (F/B):
| Frequency (MHz) | Half-power beam width | F/B (dB) | |
| Horizontal plane | Vertical plane | ||
| 1710 | 67° | 7.7° | ＞40 |
| 1940 | 62° | 6.7° | ＞40 |
| 2170 | 59° | 6° | ＞40 |
Press the antenna for base station standard, prescribed level face half-power beam width is HPBW
H=65 ° ± 6 ° judgements, measured level ground roll beam width meets the demands fully.F/B is than the requirement of the F/B 〉=27dB that stipulates considerably beyond antenna for base station.Use the standard-gain horn antenna, surveyed the gain of this antenna array on basic, normal, high three frequencies and be respectively 16.9dBi; 18dBi and 17.7dBi considering that gain has ± test error of 0.5dB, and the requirement of base station regulation G=17.5dBi is satisfied in the actual measurement gain fully.
Find out from the antenna electricity index of above actual measurement, the basic radiating element of the tabular array antenna in base station that the planar rectangular loop antenna that the utility model is mainly encouraged by broadband probe 11 constitutes, has the good electric index of broadband, moreover, also confirm can relatively large coaxial line and the bigger two-sided epoxy copper-clad plate of loss of usefulness loss can be with low cost, High-efficient Production produces the better wide band antenna for base station product of consistency.This antenna can have broad application prospects at DCS, PCS, the shared common antenna of TD-CDMA multi-business communication system.
Claims (4)
1. wideband microstrip base station array antenna, comprise a plurality of radiant bodies, coaxial line, U-shaped ground plate, it is characterized in that each radiant body adopts printing planar rectangular ring integrative-structure, the one side of this straight-flanked ring (2) is the broadband probe (11) that is in series by ∏ shape (12) and T shape (13), and the heart yearn (14) of microstrip line (6), another side is three-back-shaped quoit (9); The upper fixed of this straight-flanked ring has parasitic patch (3), and the below is connected on the U-shaped ground plate (5) by coaxial line (4).
2. little tape base according to claim 1 station array antenna, the outer conductor and three-back-shaped quoit (9) conllinear that it is characterized in that microstrip line (6), the output of microstrip line heart yearn (14) links to each other with T type probe (16), and input (17) links to each other with the inner wire (18) of coaxial line (4).
3. little tape base station antenna according to claim 1 is characterized in that printing the hem width W of planar rectangular ring (2) near 0.13 λ
0
4. little tape base station antenna according to claim 1, the length of side a that it is characterized in that parasitic patch (3) is less than half wavelength lambda.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085883 CN2727986Y (en) | 2004-08-30 | 2004-08-30 | Broadband microstrip base station array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085883 CN2727986Y (en) | 2004-08-30 | 2004-08-30 | Broadband microstrip base station array antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2727986Y true CN2727986Y (en) | 2005-09-21 |
Family
ID=35043996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420085883 Expired - Fee Related CN2727986Y (en) | 2004-08-30 | 2004-08-30 | Broadband microstrip base station array antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2727986Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976753A (en) * | 2010-10-19 | 2011-02-16 | 江苏捷士通科技股份有限公司 | Low third-order intermodulation coaxial microstrip conversion device |
| CN102655271A (en) * | 2012-05-21 | 2012-09-05 | 江苏联海通信技术有限公司 | Microstrip antenna and directional antenna comprising same |
| US9627758B2 (en) | 2014-09-17 | 2017-04-18 | Hon Hai Precision Industry Co., Ltd. | Multiband antenna |
-
2004
- 2004-08-30 CN CN 200420085883 patent/CN2727986Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976753A (en) * | 2010-10-19 | 2011-02-16 | 江苏捷士通科技股份有限公司 | Low third-order intermodulation coaxial microstrip conversion device |
| CN102655271A (en) * | 2012-05-21 | 2012-09-05 | 江苏联海通信技术有限公司 | Microstrip antenna and directional antenna comprising same |
| US9627758B2 (en) | 2014-09-17 | 2017-04-18 | Hon Hai Precision Industry Co., Ltd. | Multiband antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |