CN1222078C - Integrated double-polarized printed single-dipole antenna - Google Patents
Integrated double-polarized printed single-dipole antenna Download PDFInfo
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- CN1222078C CN1222078C CN 01139622 CN01139622A CN1222078C CN 1222078 C CN1222078 C CN 1222078C CN 01139622 CN01139622 CN 01139622 CN 01139622 A CN01139622 A CN 01139622A CN 1222078 C CN1222078 C CN 1222078C
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Abstract
The present invention relates to an integrated double-polarized printed single dipole antenna which mainly comprises a microwave baseplate, a first single dipole antenna, a second single dipole antenna and a metal grounding plane, wherein the microwave baseplate has a first surface and a second surface; the first single dipole antenna positioned on the first surface of the microwave baseplate is electrically connected with a first microstrip feed-in line and excited by a first feed-in port; the second single dipole antenna positioned on the first surface of the microwave baseplate is electrically connected with a second microstrip feed-in line and excited by a second feed-in port; the second single dipole antenna and the first single dipole antenna are mutually perpendicular; the metal grounding plane positioned on the second surface of the microwave baseplate comprises a main metal grounding plane and a protruded metal grounding plane extending between the first single dipole antenna and the second single dipole antenna. The integrated double-polarized printed single dipole antenna of the present invention has the characteristics of optimal antenna reflection coefficient and isolation degree, low reflection loss and favorable double-polarized radiation.
Description
Technical field
The present invention relates to antenna, refer to a kind of double-polarized printed one pole antenna of integrated form of Wireless LAN especially, it provides polarization diversity (Polarization diversity) to solve the multi-path attenuation effect of wireless telecommunication system.
Background technology
Flourish along with wireless telecommunications, everybody requires more and more higher for communication quality, and product not only is particular about compactly now, and more wanting to have good stable communication quality, and the multi-path attenuation effect has reduced the communication quality of system.Thereby need utilization antenna diversity (antennadiversity) to overcome the multi-path attenuation effect of wireless telecommunication system.
Generally speaking, the antenna diversity of commonly using at present (antenna diversity) is divided into frequency diversity (frequency diversity), time diversity (time diversity) and space diversity (spatial diversity).In frequency diversity (frequency diversity) system, system is switched between different frequency, to overcome the multi-path attenuation effect; In time diversity (time diversity) system, signal is to transmit or receive at different time, to overcome the multi-path attenuation effect; In space diversity (spatial diversity) system, two or more antennas are placed in different locus, to overcome the multi-path attenuation effect.
Gave the 5th, 990, No. 838 patents of the U.S. of Berne this (Bums et al.) on November 23rd, 1999, denomination of invention is " two vertical antenna of single dipole systems (Dual Orthogonal MonopoleAntenna System) ".It discloses a kind of space diversity (spatial diversity) antenna system, it has a pair of antenna of single dipole, be arranged at lower surface on the printed circuit board (PCB) of first and second dielectric layer respectively, one ground plate (ground plane) conductive layer is located between this first and second dielectric layer, wherein this is vertical mutually to antenna of single dipole, one feed-in circuit idol is connected to this to antenna of single dipole, is connected to a main system.
The U.S. the 5th, 990, though No. 838 patents provide the antenna system of a space diversity (spatial diversity), to improve the multi-path attenuation effect of wireless telecommunication system, but it still can't obtain best reflection coefficient (S11) and isolation (S21), to overcome wireless telecommunication system multi-path attenuation effect.Moreover, the U.S. the 5th, 990, No. 838 patents need be used the printed base plate of multilayer, complex structure, manufacturing cost height.
Therefore, be necessary to develop and a kind ofly can effectively solve the above-mentioned antenna system that has technical problem, to obtain best reflection coefficient (S11) and isolation (S21), to overcome the multi-path attenuation effect of wireless telecommunication system.
Summary of the invention
Main purpose of the present invention is: provide a kind of and can obtain best antenna reflection coefficient (S11) and isolation (S21), with the double-polarized printed one pole antenna of integrated form of the multi-path attenuation effect that overcomes wireless telecommunication system.
Another purpose of the present invention is: a kind of double-polarized printed one pole antenna of integrated form that solves the multi-path attenuation effect of wireless telecommunication system with polarization diversity is provided.
Another object of the present invention is to: provide a kind of integrated form simple in structure, low cost of manufacture double-polarized printed one pole antenna.
For achieving the above object, the double-polarized printed one pole antenna of integrated form of the present invention mainly comprises: microwave base plate, first unipole antenna, second unipole antenna and metal ground plate; It is characterized in that: microwave base plate has first surface and second surface; First unipole antenna is positioned on the first surface of microwave base plate, electricity connects first little band feed-in line, excited by the first feed-in port: second unipole antenna is positioned on the first surface of microwave base plate, electricity connects second little band feed-in line, excite by the second feed-in port, and second unipole antenna and first unipole antenna are orthogonal; One metal ground plate is positioned on the second surface of microwave base plate, and metal ground plate comprises main metal ground plate and extends outstanding metal ground plate between first and second unipole antenna.Wherein:
Described main metal ground plate is a rectangle, and its two ends, upper surface are arranged with 45 degree tangent planes adjacent, equal in length.
Described first and second unipole antenna is long straight radiation metal wires, and its length is identical, and resonates in 1/4 wavelength, and is based in respectively on two tangent planes of main metal ground plate, becomes 90 degree angles with tangent plane.
Described first and second unipole antenna is symmetrical in outstanding metal ground plate.
Described outstanding metal ground plate is a rectangle, and it simultaneously is connected between two tangent planes of main metal ground plate, and its length is 1.5 times of first and second unipole antenna length, and its width is 0.8 times of first and second unipole antenna length.
Described outstanding metal ground plate is a T shape or trapezoidal metallic plate, and it simultaneously is connected between two tangent planes of main metal ground plate.
Described first and second little band feed-in line is 50 ohm microstrip.
Technical advantage of the present invention is:
According to the present invention, the outstanding metal ground plate of the double-polarized printed one pole antenna of this integrated form can effectively reduce two coupling amount and reflection losses between the unipole antenna, obtains the good isolation degree, and helps to obtain good impedance matching.Antenna Design of the present invention shows in a kind of embodiment experimental result of 2.4-GHZ Wireless LAN, utilize (2400-2484MHZ) operation in operational frequency bands of this outstanding metal ground plate, can be so that the isolation between two unipole antennas all be lower than-27dB: in addition, the radiation pattern measurement of embodiment also shows that antenna has good dual polarised radiation characteristic.Antenna structure of the present invention is simple, making is easy and save the space, is very easy to simultaneously and the interlock circuit integration, is highly suitable for using on the product of Wireless LAN.
Description of drawings
Fig. 1, be structural representation of the present invention.
Fig. 2, be the experiment and the analog result figure of antenna reflection coefficient of the present invention (S11) and isolation (S21).
Fig. 3, be the width of the fixing outstanding grounding plate of antenna of the present invention, and change the reflection coefficient (S11) and isolation (S21) experimental result picture of different length.
Fig. 4, be the length of the fixing outstanding metal ground plate of antenna of the present invention, and change the reflection coefficient (S11) and isolation (S21) experimental result picture of different in width.
Fig. 5, be the length and the width of the fixing outstanding metal ground plate of antenna of the present invention, and change the reflection coefficient (S11) and isolation (S21) experimental result picture of unipole antenna diverse location.
Fig. 6, for the antenna of the present invention first feed-in port at the radiation pattern experimental result picture of 2450MHZ.
Fig. 7, for the antenna of the present invention second feed-in port at the radiation pattern experimental result picture of 2450MHZ.
Fig. 8, the experimental result picture that in the 2450MHZ frequency band, gains for antenna operation of the present invention.
Fig. 9, be the second example structure schematic diagram of the outstanding metal ground plate of antenna of the present invention.
Figure 10, be the 3rd example structure schematic diagram of the outstanding metal ground plate of antenna of the present invention.
Embodiment
Though the present invention can show as multi-form embodiment, accompanying drawing and explanation are preferred embodiment of the present invention, just as understanding one example of the present invention, do not really want the present invention to be limited to diagram and to illustrate in the described specific embodiment.
Referring to Fig. 1, be the embodiment of the invention (one) that the double-polarized printed one pole antenna 1 of a kind of integrated form mainly comprises: microwave base plate 40, first unipole antenna 10, second unipole antenna 20 and metal ground plate 30.This microwave base plate 40 has first surface 41 (upper surface) and second surface 42 (lower surface); Wherein, first unipole antenna 10 and second unipole antenna 20 are positioned on microwave base plate 40 first surfaces 41, and orthogonal; And metal ground plate 30 is positioned on microwave base plate 40 second surfaces 42, comprise main metal ground plate 31 and extend first unipole antenna 10 and second unipole antenna 20 between outstanding metal ground plate 32.
Main metal ground plate 31 preferred shape are rectangles or approximate rectangular, and outstanding metal ground plate 32 preferred shape also are rectangles or approximate rectangular.In addition, in order to make that these two unipole antennas 10,20 can be respectively and the laying of the tangent plane vertical mutually (angle α=90 are spent) of main metal ground plate 31, thereby two ends, main metal ground plate 31 upper surface are arranged with 45 degree tangent planes adjacent, equal in length, and with the radiation metal wires of unipole antenna 10,20 respectively perpendicular on this tangent plane, and be symmetrical in outstanding metal ground plate 32.First, second unipole antenna 10,20 through first little band feed-in line 11 and second little band feed-in line 21, is excited by the first feed-in port 12 and the second feed-in port 22 respectively; First little band feed-in line 11 and second little band feed-in line 21 is 50 ohm microstrip.Two unipole antennas 10,20 are long straight radiation metal wires, and its length is identical, and resonates in 1/4 wavelength, and is symmetrical in outstanding metal ground plate 32.Outstanding metal ground plate 32 can reduce the coupling amount between two unipole antennas 10,20 effectively; Therefore suitably adjust the position that length L, width D 1 and the unipole antenna of this outstanding metal ground plate 32 lay (being between the interior end points of unipole antenna 10,20 and main metal ground plate 31 tangent planes) apart from d, can obtain the optimum value of isolation (S21), therefore can reduce the amount of intercoupling between two unipole antennas 10,20 significantly, reach desirable isolation effect.
Referring to Fig. 2-5, be according to the double-polarized printed one pole antenna of the integrated form antenna reflection coefficient (S11) that the measured result of antenna reflection coefficient (S11) and isolation (S21) is depicted as under different experimental conditions and the curve chart of isolation (S21).For example: Fig. 2 is the measured curve 201 and the measured curve 201 of its simulation curve 202 and isolation between antennas (S21) and the performance chart of its simulation curve 202 of antenna reflection coefficient of the present invention (S11).From to the analysis of the curve contrast as can be seen: as long as suitably select suitable outstanding metal ground plate size, just can obtain the optimum value of antenna reflection coefficient (S11) and isolation (S21), measured curve among the figure and simulation curve are quite approaching.
Referring to Fig. 6-8, as can be seen from the figure: Wireless LAN under 2.4GHZ frequency band (2400-2484MHZ), the reflection loss of all frequencies all-below the 20dB, its impedance matching is pretty good, and the isolation at two feed-in ports all-below the 27dB, have very good isolation degree.From above-mentioned interpretation, the different installation positions (between the interior end points of unipole antenna 10,20 and main metal ground plate 31 tangent planes apart from d) of different length L, width D 1 and the unipole antenna of outstanding metal ground plate 32 are described, directly influence the reflection coefficient (S11) and the isolation (S21) of antenna.
Be respectively outstanding metal ground plate 32 resulting experimental result under different length L (L=32,44,22,0mm) referring to (S11) curve of the antenna reflection coefficient among Fig. 3 and isolation (S21) curve 301,302,303 and 304; Wherein with the best as a result of curve 301 (being same as the curve 201 among Fig. 2), the isolation at two feed-in ports is best; This moment, length L approximated 1.5 times of unipole antenna length greatly.
Be respectively outstanding metal ground plate 32 resulting experimental result under different in width D1 (D1=17,22,11mm) referring to (S11) curve of the antenna reflection coefficient among Fig. 4 and isolation (S21) curve 401,402,403; Wherein with the best as a result of curve 401 (being same as curve 201 among Fig. 2 and the curve 301 among Fig. 3), the isolation at two feed-in ports is best; This moment, width D 1 approximated 0.8 times of unipole antenna length greatly.
(apart from d, (d=5,2,10,15mm) be resulting experimental result respectively between the interior end points of unipole antenna 10,20 and main metal ground plate 31 tangent planes to be respectively the different installation positions of unipole antenna referring to (S11) curve of the antenna reflection coefficient among Fig. 5 and isolation (S21) curve 501,502,503,504; Wherein with the best as a result of curve 501 (being same as curve 201 among Fig. 2, curve 301 among Fig. 3 and the curve 401 among Fig. 4), the isolation at two feed-in ports is best; This moment approximate 0.25 times of unipole antenna length greatly apart from d.In addition, also find in the experiment, change the distance D 2 between the two feed-in ports, very little for the isolation influence at two feed-in ports.
Referring to Fig. 6,7, be respectively the experimental result of first and second feed-in port at the 2450MHZ radiation pattern; By the result as can be seen, the radiation pattern at two feed-in ports has symmetry, and both E and H plane are orthogonal, present good dual polarised radiation characteristic.The experimental result that Fig. 8 gains in the 2450MHZ frequency band for antenna operation of the present invention can find out that by the result of gained this antenna has good gain.
Referring to Fig. 9,10, metal ground plate 32 second embodiment that give prominence to for the present invention and the structural representation of the 3rd embodiment.Outstanding metal ground plate 32 can be made as T shape or trapezoidal metallic plate, and it simultaneously is connected between two tangent planes of main metal ground plate 31; Under suitable size, two kinds of outstanding metal ground plates also can effectively reduce the coupling amount between two unipole antennas of the present invention, make two feed-in ports obtain good isolation, and help to obtain good impedance matching.
Though above-mentioned description and diagram have disclosed preferred embodiment of the present invention, must recognize various increase, revise and replace all can use preferred embodiment of the present invention, and can not break away from the spirit and the scope of the principle of the invention that institute's claim defines.Be familiar with this skill person and can realize the modification that the present invention can use a lot of forms, structure, layout, ratio, material, element and assembly.Therefore, embodiments disclosed herein and all viewpoints should be regarded as in order to explanation the present invention, but not in order to restriction the present invention.Scope of the present invention should be defined by back patent protection scope, and contains its legal equivalents, is not limited to previous description.
Claims (7)
1, the double-polarized printed one pole antenna of a kind of integrated form mainly comprises: microwave base plate, first unipole antenna, second unipole antenna and metal ground plate; It is characterized in that: microwave base plate has first surface and second surface; First unipole antenna is positioned on the first surface of microwave base plate, electricity connects first little band feed-in line, excite by the first feed-in port, second unipole antenna is positioned on the first surface of microwave base plate, electricity connects second little band feed-in line, excite by the second feed-in port, and second unipole antenna and first unipole antenna are orthogonal; One metal ground plate is positioned on the second surface of microwave base plate, and metal ground plate comprises main metal ground plate and extends outstanding metal ground plate between first and second unipole antenna.
2, the double-polarized printed one pole antenna of integrated form according to claim 1, it is characterized in that: described main metal ground plate is a rectangle, its two ends, upper surface are arranged with 45 degree tangent planes adjacent, equal in length.
3, the double-polarized printed one pole antenna of integrated form according to claim 1, it is characterized in that: described first and second unipole antenna is long straight radiation metal wires, its length is identical, and resonate in 1/4 wavelength, and be based in respectively on two tangent planes of main metal ground plate, become 90 degree angles with tangent plane.
4, the double-polarized printed one pole antenna of integrated form according to claim 3, it is characterized in that: described first and second unipole antenna is symmetrical in outstanding metal ground plate.
5, the double-polarized printed one pole antenna of integrated form according to claim 1, it is characterized in that: described outstanding metal ground plate is a rectangle, and it simultaneously is connected between two tangent planes of main metal ground plate, and its length is 1.5 times of first and second unipole antenna length, and its width is 0.8 times of first and second unipole antenna length.
6, the double-polarized printed one pole antenna of integrated form according to claim 1 is characterized in that: described outstanding metal ground plate is a T shape or trapezoidal metallic plate, and it simultaneously is connected between two tangent planes of main metal ground plate.
7, the double-polarized printed one pole antenna of integrated form according to claim 1 is characterized in that: described first and second little band feed-in line is 50 ohm microstrip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01139622 CN1222078C (en) | 2001-11-26 | 2001-11-26 | Integrated double-polarized printed single-dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01139622 CN1222078C (en) | 2001-11-26 | 2001-11-26 | Integrated double-polarized printed single-dipole antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN1421958A CN1421958A (en) | 2003-06-04 |
| CN1222078C true CN1222078C (en) | 2005-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01139622 Expired - Fee Related CN1222078C (en) | 2001-11-26 | 2001-11-26 | Integrated double-polarized printed single-dipole antenna |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913224B (en) * | 2005-08-09 | 2011-09-14 | 技嘉科技股份有限公司 | Circuit board antenna |
| WO2012097623A2 (en) * | 2011-10-28 | 2012-07-26 | 华为终端有限公司 | Antenna and terminal |
| CN103107415A (en) * | 2011-11-11 | 2013-05-15 | 华硕电脑股份有限公司 | Antenna module |
| CN104282993A (en) * | 2013-07-05 | 2015-01-14 | 启碁科技股份有限公司 | Radio frequency device and wireless communication device |
| CN104868228B (en) * | 2014-02-25 | 2018-05-11 | 华为技术有限公司 | Dual polarized antenna and aerial array |
| CN110444866A (en) * | 2019-08-15 | 2019-11-12 | 河海大学 | A kind of ternary micro-strip dipole antenna based on PEG and yagi aerial structure |
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2001
- 2001-11-26 CN CN 01139622 patent/CN1222078C/en not_active Expired - Fee Related
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Granted publication date: 20051005 Termination date: 20151126 |