CN1190020C - Integrated dual-frequency printed single dipole antenna - Google Patents
Integrated dual-frequency printed single dipole antenna Download PDFInfo
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- CN1190020C CN1190020C CNB021228035A CN02122803A CN1190020C CN 1190020 C CN1190020 C CN 1190020C CN B021228035 A CNB021228035 A CN B021228035A CN 02122803 A CN02122803 A CN 02122803A CN 1190020 C CN1190020 C CN 1190020C
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- frequency
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- metal wire
- monodipole
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Abstract
The present invention relates to an integrated dual-frequency printed single dipole antenna which mainly comprises a microwave baseplate, a first dual-frequency single dipole antenna, a second dual-frequency single dipole antenna and a grounding plane, wherein the baseplate is provided with a first surface and a second surface, and the first and the second dual-frequency single dipole antennas arranged on the first surface of the baseplate are excited by a first feed-in port or a second feed-in port via a first microstrip feed-in wire or a second microstrip feed-in wire. Each of the first and the second dual-frequency single dipole antennas comprises a first horizontal radiation metal wire, a second horizontal radiation metal wire and a vertical radiation metal wire. One end of the vertical radiation metal wire is a feed-in point which is connected with the first microstrip feed-in wire or the second microstrip feed-in wire. The grounding plane is arranged on the second surface of the baseplate, wherein the grounding plane comprises a main grounding plane and a protruded grounding plane which extends between a first and a second antennas.
Description
Technical field
The present invention is relevant for a kind of antenna system, more relevant for a kind of integrated dual-frequency printed single dipole antenna that is applied to WLAN.
Background technology
Flourish along with wireless telecommunications, everybody requires also 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, however the multi-path attenuation effect has reduced the communication quality of system significantly.Thereby need utilization antenna diversity (antenna diversity) to overcome the multi-path attenuation effect of wireless telecommunication system.
Generally speaking, public antenna diversity (antenna diversity) is reached with frequency diversity (frequency diversity), time diversity (time diversity) or space diversity (spatialdiversity) at present.In frequency diversity (frequency diversity), system is switched between different frequency, to overcome the multi-path attenuation effect.In time diversity (time diversity) system, signal transmits or receives in 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 U.S. the 5th of Berne this (Burns et al.) on November 23rd, 1999,990, No. 838 patents, denomination of invention is " two vertical antenna of single dipole systems (Dual Orthogonal MonopoleAntenna System) ", it proposes a kind of space diversity (spatial diversity) antenna system, it has a pair of antenna of single dipole, lay respectively at one and have the upper and lower surface of the printed circuit board (PCB) of first and second dielectric layer, one ground plane (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 is coupled 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 this design is only applicable to single operation, and still can't obtain preferable isolation between two feed-in ports of this antenna system (its isolation S21 is higher than-20dB).Moreover, the U.S. the 5th, 990, No. 838 patents need be used the printed base plate of multilayer, need complicated structure and high manufacturing cost.
Therefore, be necessary to seek a kind of antenna system that can effectively solve the aforementioned prior art problem, being applicable to the operation of double frequency-band such as 2.4GHz and 5.2GHz WLAN system, can obtain simultaneously preferable isolation (S21 is lower than-20dB) and can more effectively improve the multi-path attenuation effect of wireless telecommunication system.
Summary of the invention
Main purpose of the present invention provides a kind of integrated dual-frequency printed single dipole antenna, can obtain the operational capacity of double frequency-band, goes for the operation as 2.4GHz and 5.2GHz WLAN system.
Secondary objective of the present invention provides a kind of integrated dual-frequency printed single dipole antenna, has preferable isolation between two feed-in ports of this antenna, with effective multi-path attenuation effect of improving wireless telecommunication system.
Another object of the present invention provides a kind of integrated dual-frequency printed single dipole antenna, and it has simple structure and can be with the low cost manufacturing.
For reaching above-mentioned purpose, the invention provides a kind of integrated dual-frequency printed single dipole antenna, it mainly comprises: a microwave base plate, one first double-frequency monodipole, one second this substrate of double-frequency monodipole and a ground plane.This substrate has a first surface and a second surface.
This first and second double-frequency monodipole is located on the first surface of this substrate and is orthogonal.This first or second double-frequency monodipole all is by a little band feed-in line, excites via a feed-in port.This first and second double-frequency monodipole all comprises one first horizontal radiation metal wire, one second horizontal radiation metal wire and a vertical radiation metal wire.Respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, the first horizontal radiation metal wire is connected to an end of vertical radiation metal wire, this end is positioned at the opposite end of feed-in port, the second horizontal radiation metal wire is connected to the diverse location that the first horizontal radiation metal wire is connected with the vertical radiation metal wire, and the other end of two horizontal radiation metal wires (openend) extends in the same direction, makes its affiliated double-frequency monodipole form a F font.Respectively in this first and second double-frequency monodipole inside, all have from the path of feed-in port via vertical radiation metal wire to the first horizontal radiation metal wire openend, constitute first resonance path of its affiliated double-frequency monodipole operation, and determine first (lower) frequency of operation of its affiliated double-frequency monodipole.In addition, respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, from the path of feed-in port via vertical radiation metal wire to the second horizontal radiation metal wire openend, constitute second resonance path of its affiliated double-frequency monodipole operation, and determine second (higher) frequency of operation of its affiliated double-frequency monodipole.Therefore, this first and second double-frequency monodipole can have the operational capacity of double frequency-band.
This ground plane is positioned on the second surface of this substrate, and wherein this ground plane comprises a main ground plane and and extends outstanding ground plane between this first and second antenna.This main ground plane is a rectangle or approximate rectangular, has two adjacent rescinded angles on it, cuts out into the tangent plane of one 45 degree respectively, and the both sides identical length of rescinded angle together.This first and second double-frequency monodipole is located at respectively on two rescinded angle limits of this main ground plane, ornaments (angle α) and its orientation of being vertical (90 degree) with the rescinded angle limit are mutually symmetrical in this outstanding ground plane, make this outstanding ground plane can effectively reduce two coupling amounts between double-frequency monodipole, obtain the good isolation degree to obtain good impedance matching.
Description of drawings
Fig. 1 is the structure chart of integrated dual-frequency printed single dipole antenna of the present invention;
Fig. 2 is the experimental result according to one embodiment of the invention antenna reflection coefficient (S11) and isolation (S21):
Fig. 3 is in the radiation pattern experimental result of 2450MHz according to one embodiment of the invention antenna first feed-in port;
Fig. 4 is in the radiation pattern experimental result of 2450MHz according to one embodiment of the invention antenna second feed-in port;
Fig. 5 is in the radiation pattern experimental result of 5250MHz according to one embodiment of the invention antenna first feed-in port;
Fig. 6 is in the radiation pattern experimental result of 5250MHz according to one embodiment of the invention antenna second feed-in port;
Fig. 7 is according to the measurement of one embodiment of the invention antenna in the gain of 2.4GHz WLAN system frequency band internal antenna;
Fig. 8 is according to the measurement of one embodiment of the invention antenna in the gain of 5.2GHz WLAN system frequency band internal antenna; And
Fig. 9 a-9b is the dual-frequency printed single dipole antenna structure chart of other embodiment of the present invention.
Description of reference numerals:
1: integrated dual-frequency printed single dipole antenna
10: the first double-frequency monodipoles
11: the first horizontal radiation metal wires
12: the second horizontal radiation metal wires
13: the vertical radiation metal wire
14: little band feed-in line
15: the feed-in port
16: load point
α: the angle on first (the second) double-frequency monodipole and main ground plane 31 rescinded angle limits
20: the second double-frequency monodipoles
30: ground plane
31: main ground plane
32: outstanding ground plane
40: microwave base plate
41: first surface
42: second surface
910: the first double-frequency monodipoles
911: the first horizontal radiation metal wires
912: the second horizontal radiation metal wires
913: the vertical radiation metal wire
920: the second double-frequency monodipoles
931: main ground plane
932: outstanding ground plane
701,702,801,802: curve
Embodiment
Though the present invention can show as multi-form embodiment, but shown in the accompanying drawing and in hereinafter being illustrated as embodiments of the invention, and please understand this paper for one example of the present invention, and be not that intention is in order to be limited to the present invention in icon and/or the described specific embodiment.
Please refer to Fig. 1, a kind of integrated dual-frequency printed single dipole antenna 1 mainly comprises a microwave base plate 40, one first double-frequency monodipoles 10, one second double-frequency monodipoles 20, and a ground plane 30.This microwave base plate 40 has a first surface 41 (upper surface) and a second surface 42 (lower surface), wherein this first double-frequency monodipole 10 and one second double-frequency monodipole 20 are positioned on microwave base plate 40 first surfaces 41, and orthogonal, and this ground plane 30 is positioned on microwave base plate 40 second surfaces 42.This ground plane 30 comprises a main ground plane 31 and an outstanding ground plane 32 and extends 20 of this first double-frequency monodipole 10 and one second double-frequency monodipoles.
According to the present invention, the printed circuit board (PCB) that microwave base plate 40 is generally made with glass fiber-reinforced BT (bismaleimide-triazine) resin or FR4 glass reinforced epoxy (fiberglass reinforced epoxyresin), the pliability sheet substrate of also can polyimide (polyimide) making (flexible film substrate).First double-frequency monodipole 10 and one second double-frequency monodipole 20 are printed on microwave base plate 40 first surfaces 41, and this ground plane 30 is printed on microwave base plate 40 second surfaces 42.
Roughly has same structure according to first double-frequency monodipole 10 of the present invention and second double-frequency monodipole 20.With reference to Fig. 1, this double-frequency monodipole 10 and 20 mainly comprises: one first horizontal radiation metal wire 11, one second horizontal radiation metal wire 12, a vertical radiation metal wire 13 and a load point 16.One feed-in metal wire 14 is arranged on the first surface 41 of this microwave base plate 40.This first and second horizontal radiation metal wire 11,12 and vertical radiation metal wire 13 are printed on the first surface 41 of this substrate 40, and wherein this vertical radiation metal wire 13 is roughly vertical with this second horizontal radiation metal wire 12 with this first horizontal radiation metal wire 11.This load point 16 is positioned on this vertical radiation metal wire 13, in order to connect this feed-in metal wire 14 and vertical radiation metal wire 13, with transmitting signals.In this embodiment, this first horizontal radiation metal wire 11 is connected near an end of this vertical radiation metal wire 13 or its, this end is positioned at the opposite end of this load point 16, this second horizontal radiation metal wire 12 is connected to the diverse location that this first horizontal radiation metal wire 11 is connected with this vertical radiation metal wire 13, and the other end (openend) of this two horizontal radiations metal wire 11,12 extends in the same direction, makes this antenna 10 and 20 form a F font.In the embodiment in figure 1, the double-frequency monodipole 10 of this F font and 20 is provided with in back-to-back mode.
Via the path of vertical radiation metal wire 13, constitute first resonance path of this double-frequency monodipole 10 and 20 operations from this load point 16, and determine first (lower) frequency of operation of this antenna 10 and 20 to these first horizontal radiation metal wire, 11 openends.In addition, via the path of vertical radiation metal wire 13, constitute second resonance path of antenna 10 and 20 operations to these second horizontal radiation metal wire, 12 openends from this load point 16, and second (higher) frequency of operation of decision antenna 10 and 20.
Main ground plane 31 preferable rectangular or approximate rectangular shapes, and outstanding metal ground plane 32 also is a rectangle or approximate rectangular shape.In addition, in order to make these two double-frequency monodipoles 10 and 20 can be the ornaments (angle α) of vertical (90 degree) respectively with the edge of main metal ground plane 31, thereby two adjacent angular of main ground plane 31 are cut out into the tangent plane of one 45 degree, and the radiation metal wires of antenna of single dipole 10 and 20 is vertically placed on the limit of this rescinded angle.
First and second double-frequency monodipole 10 and 20 via one first little band feed-in line 14, is excited by a feed-in port 15 respectively, and wherein little band feed-in line 14 is preferably 50 ohm microstrip.First and second double-frequency monodipole 10 and 20 has same structure, same size and is configured to be symmetrical in outstanding ground plane 32.Should can reduce by two coupling amounts between double-frequency monodipole effectively by outstanding ground plane 32.An isolation (S21) optimum value can be obtained, therefore coupling amount mutual between two double-frequency monodipoles can be significantly reduced, and the multi-path attenuation effect of improving wireless telecommunication system.
Reality according to integrated dual-frequency printed single dipole antenna 1 of the present invention is shown in Fig. 2 to Fig. 8 as measurement.The experimental result of reflection coefficient of antenna of the present invention (S11) and isolation (S21) is shown in Fig. 2.As shown in Figure 2, in WLAN under 2.4GHz frequency band (2400-2484MHz) and 5.2GHz frequency band (5150-5350MHz), the reflection coefficient of all frequencies all-below the 10dB, represent that its impedance matching is greatly improved, and the isolation of two feed-in ports all-therefore below the 28dB, can provide isolation preferably.
Fig. 3 to Fig. 6 is that these two feed-in ports are in the radiation pattern experimental result of 2450MHz and 5250MHz; By the result as can be seen, the radiation pattern of two feed-in ports has symmetry, and both are in conjunction with providing antenna one bigger radiation pattern of the present invention to contain the scope of lid.Fig. 7 and Fig. 8 can find out that by the gained result this antenna has good gain for antenna of the present invention operates in the experimental result that gains in 2450MHz and the 5250MHz frequency band respectively.
Fig. 9 (a) to (b) is other example structure figure of integrated dual-frequency printed single dipole antenna of the present invention.In the embodiment shown in Fig. 9 (a), the width of the first horizontal radiation metal wire 911, the second horizontal radiation metal wire 912 and the vertical radiation metal wire 913 of two F shape double-frequency monodipoles 910,920 can be different.And in the embodiment shown in Fig. 9 (b), two F shape double-frequency monodipoles 910,920 can be put (with respect to back-to-back the putting among Fig. 1) face-to-face.
Though aforesaid description and icon have illustrated embodiments of the invention, must recognize variously increase, many modifications and replace and may be used in the embodiment of the invention, and can not break away from the spirit and the scope of the principle of the invention that defines as appended claim.Be familiar with this operator and can know from experience the modification that the present invention may be used in a lot of forms, structure, layout, ratio, material, assembly and assembly.Therefore, this paper, should be regarded as in order to explanation the present invention in all viewpoints in this illustrated embodiment, but not in order to restriction the present invention.Scope of the present invention should be defined by applying for a patent the claim scope, and contains its legal equivalents, is not limited to previous description.
Claims (8)
1. integrated dual-frequency printed single dipole antenna is characterized by: comprise:
One microwave base plate, this substrate have a first surface and a second surface;
One first double-frequency monodipole is positioned on the first surface of this substrate, via one first little band feed-in line, is excited by one first feed-in port;
One second double-frequency monodipole is positioned on the first surface of this substrate, via one second little band feed-in line, is excited by one second feed-in port; And
One ground plane is positioned on the second surface of this substrate, and this ground plane comprises a main ground plane and and extends outstanding ground plane between this first and second double-frequency monodipole,
Wherein this first and this second double-frequency monodipole all comprise:
One first horizontal radiation metal wire;
One second horizontal radiation metal wire; And
One vertical radiation metal wire, the one end is a load point, be connected to this first or this second little band feed-in line;
This first horizontal radiation metal wire is connected to an end of this vertical radiation metal wire, this end is positioned at the opposite end of this load point, this second horizontal radiation metal wire is connected to the diverse location that this first horizontal radiation metal wire is connected with this vertical radiation metal wire, and the other end of this two horizontal radiations metal wire extends in the same direction, makes first double-frequency monodipole and second double-frequency monodipole form a F font respectively;
First and second double-frequency monodipole is orthogonal, has same structure, same size and be configured to be symmetrical in outstanding ground plane.
2. integrated dual-frequency printed single dipole antenna as claimed in claim 1, it is characterized by: respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, from the path of load point via vertical radiation metal wire to the first horizontal radiation metal wire openend, constitute first resonance path of its affiliated double-frequency monodipole operation, and determine first frequency of operation of its affiliated double-frequency monodipole.
3. integrated dual-frequency printed single dipole antenna as claimed in claim 1, it is characterized by: respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, from the path of load point via vertical radiation metal wire to the second horizontal radiation metal wire openend, constitute second resonance path of its affiliated double-frequency monodipole operation, and determine second frequency of operation of its affiliated double-frequency monodipole.
4. integrated dual-frequency printed single dipole antenna as claimed in claim 1 is characterized by: this main ground plane is a rectangle or approximate rectangular, has two adjacent rescinded angles on it, cuts out into the tangent plane of one 45 degree respectively.
5. integrated dual-frequency printed single dipole antenna as claimed in claim 1 is characterized by: this first and this second little band feed-in line be 50 ohm microstrip.
6. integrated dual-frequency printed single dipole antenna as claimed in claim 1 is characterized by: this first and this second antenna of single dipole be symmetrical in this outstanding ground plane.
7. integrated dual-frequency printed single dipole antenna as claimed in claim 1 is characterized by: respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, the vertical radiation metal wire is roughly vertical with first and second horizontal radiation metal wire.
8. integrated dual-frequency printed single dipole antenna as claimed in claim 1, it is characterized by: respectively in the inside of this first double-frequency monodipole and this second double-frequency monodipole, the width difference of the first horizontal radiation metal wire, the second horizontal radiation metal wire and vertical radiation metal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021228035A CN1190020C (en) | 2002-06-04 | 2002-06-04 | Integrated dual-frequency printed single dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021228035A CN1190020C (en) | 2002-06-04 | 2002-06-04 | Integrated dual-frequency printed single dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1464643A CN1464643A (en) | 2003-12-31 |
| CN1190020C true CN1190020C (en) | 2005-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021228035A Expired - Fee Related CN1190020C (en) | 2002-06-04 | 2002-06-04 | Integrated dual-frequency printed single dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1190020C (en) |
Cited By (2)
| 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 |
| CN101572356B (en) * | 2008-04-30 | 2013-04-03 | 广达电脑股份有限公司 | Loop antenna device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405661C (en) * | 2004-08-13 | 2008-07-23 | 智易科技股份有限公司 | Double frequency and wide frequency plane dipole antenna |
| TWI617091B (en) * | 2016-06-14 | 2018-03-01 | 國立中山大學 | Communication device and antenna element therein |
| CN109378569B (en) * | 2018-12-05 | 2021-01-22 | 歌尔股份有限公司 | Mobile terminal device |
-
2002
- 2002-06-04 CN CNB021228035A patent/CN1190020C/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| CN101572356B (en) * | 2008-04-30 | 2013-04-03 | 广达电脑股份有限公司 | Loop antenna device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1464643A (en) | 2003-12-31 |
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