CN100364171C - Plane double-frequency monopole antenna - Google Patents
Plane double-frequency monopole antenna Download PDFInfo
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- CN100364171C CN100364171C CNB031049052A CN03104905A CN100364171C CN 100364171 C CN100364171 C CN 100364171C CN B031049052 A CNB031049052 A CN B031049052A CN 03104905 A CN03104905 A CN 03104905A CN 100364171 C CN100364171 C CN 100364171C
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- 230000005404 monopole Effects 0.000 title abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000005855 radiation Effects 0.000 claims description 51
- 238000013461 design Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 abstract 3
- 238000005259 measurement Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
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Abstract
The present invention relates to a plane double-frequency monopole antenna which is provided for providing an antenna which has short length and small volume and can receive signals from different frequency channels. The present invention comprises a dielectric substance substrate, a microstrip line and a grounding metal surface, wherein the microstrip line is printed on one side surface of the dielectric substance substrate and uses one end as the signal feed-in end; the grounding metal surface is printed on the other side surface of the dielectric substance substrate and corresponds to the microstrip line; the other end of the microstrip line extends along a longitudinal axis towards one side to form a radiant body with low frequency after extending towards a direction corresponding to the direction of position outside the grounding metal surface for predetermined length; the radiant body with low frequency extends towards a direction corresponding to the direction of the grounding metal surface to position corresponding to the adjacent grounding metal surface after extending for predetermined length; the microstrip line extends along a longitudinal axis towards one side to form a plane and a radiant body with high frequency after extending for predetermined length.
Description
Technical field
The invention belongs to antenna, particularly a kind of plane formula double frequency mono-polar antenna.
Background technology
Tradition is used and is referred to as to call Le Xieer (Lecher) line with the antenna that is arranged in parallel on the general television set.As shown in Figure 1, the radiation metal pipe 14 that this antenna is arranged in parallel thereon, as copper pipe very near the time, give off the opposite electromagnetic field of direction with inducing the electric current that is reverse flow each other, causing, do not produce radiation because of cancelling out each other.
Therefore, in order to make antenna radiation electric wave effectively still in small space, as shown in Figure 2, be that the front end with Le Xieer (Lecher) line bends 90 ° respectively in the opposite direction traditionally, electric current flows in the same direction on it to make, thereby forms so-called now dipole (dipole) antenna.Dipole antenna system utilizes the transmission line of balanced type (Balanced) framework as feed-in line 24, two signal line terminals 242 of balanced type framework transmission line are extended equal length respectively round about, the length of each signal line terminal 242 is about 1/4th of resonant wavelength (λ), so its total length is about 1/2nd of resonant wavelength.So, dipole antenna can utilize two sections to be respectively quarter-wave signal line terminal 242 as radiant body, can be described as half wavelength dipole antenna again so plant antenna, and it generally is the single-frequency design.
For making this kind antenna more compact, existing dealer is made in this kind dipole antenna on the printed circuit board (PCB), to make the microstrip-type unipole antenna traditionally.
As shown in Figure 3, Figure 4, the microstrip-type unipole antenna comprise dielectric medium substrate 37, be printed on dielectric medium substrate 37 1 sides with an end as the microstrip line 34 of signal feed side 341 and be printed on the grounding metal plane 38 of dielectric medium substrate 37 another sides corresponding to microstrip line 34 positions.The other end system of microstrip line 34 forms so-called unipole antenna (mono pole) to extending the radiant body 342 that is the shape of falling L corresponding to grounding metal plane 38 with external position.The mapping principle (Imagetheory) that unipole antenna system utilizes grounding metal plane 38 to be produced, shine upon the microstrip line 34 and the shape of the falling L radiant body 342 of this one non-equilibrium (Unbalanced) formula framework, be equivalent to the radiant body framework of dipole antenna with formation, this kind unipole antenna generally also designs for single-frequency.
In recent years, because the market demand of mobile communication product heightens, make that the development of wireless telecommunications is more quick, in numerous wireless communication standards, the most noticeable is that U.S.'s Institute of Electrical and Electronics Engineers is (hereinafter to be referred as IEEE) 802.11 Wireless LANs (Wireless Local Area Network) agreement, IEEE 802.11 agreement systems formulate in the period of 1997, this agreement not only provides many unprecedented functions in the wireless telecommunications, and the solution that can make various different label wireless products be communicated with each other also is provided.The formulation of this agreement has been opened a new milestone for the development of wireless telecommunications undoubtedly.
Yet, between in August, 2000, IEEE can become combination with standard between U.S.'s Institute of Electrical and Electronics Engineers (IEEE)/American National Standards Institute and International Standards Organization (ISO)/international electronic technology trade council (IEC) for making 802.11 agreements, be that it has been done further revision, two important contents have been increased in its Description of Revision, be IEEE802.11a agreement and IEEE802.11b agreement, regulation according to these two agreements, in the standard physical layer of expansion, its working band must be separately positioned on 5,000,000,000 hertz (5GHz) and 2,400,000,000 hertz (24GHz), so when radio communication product is desired to use these two kinds of wireless communication protocols simultaneously, the aforementioned conventional antenna promptly can't satisfy this demand, and must a plurality of antennas be installed according to the requirement on the frequency band.Yet this measure has not only increased cost of parts, installation procedure, more needs to vacate more space to fix up an aerial wire on radio communication product, causes the volume of radio communication product can't dwindle easily to meet the trend of compact design all the time.
Summary of the invention
The purpose of this invention is to provide a kind of different frequency range signal, length is short, volume is little plane formula double frequency mono-polar antenna of receiving.
The present invention includes a dielectric medium substrate; A microstrip line is printed on dielectric medium substrate one surface, and as the signal feed side, an end relative with this signal feed side of this little electric wire forms the other end of little electric wire with an end of this little electric wire; A grounding metal plane be printed on dielectric medium substrate and another relative surface of surface, microstrip line place, and the position of this grounding metal plane is relative with the position of microstrip line; A low frequency radiation body, this low frequency radiation body is by other end extension of the direction beyond the position relative with grounding metal plane on surface, microstrip line place of microstrip line, this bearing of trend forms the longitudinal axis direction of microstrip line, and this low frequency radiation body side direction to the longitudinal axis of microstrip line after definite length extended extends, and, continue to extend to contiguous relative position to the locality relative with grounding metal plane with grounding metal plane on surface, microstrip line place after longitudinal axis one side definite length extended; And high frequency radiation body, this high frequency radiation body is extended by the direction of the described other end beyond the position relative with grounding metal plane of microstrip line on surface, microstrip line place, and to extend to the opposite side direction of the longitudinal axis of microstrip line after the microstrip line definite length extended be a plane, makes high frequency radiation and low frequency radiation body lay respectively at the both sides of microstrip line longitudinal axis.
Wherein: 1/4th length of each band wavelength in the two-band that the described other end of described microstrip line is extremely low, the free-ended length of high frequency radiation body equals institute's desire design respectively.
Owing to the present invention includes a dielectric medium substrate; A microstrip line is printed on dielectric medium substrate one surface, and as the signal feed side, an end relative with this signal feed side of this little electric wire forms the other end of little electric wire with an end of microstrip line; A grounding metal plane be printed on dielectric medium substrate and another relative surface of surface, microstrip line place, and the position of this grounding metal plane is relative with the position of microstrip line; A low frequency radiation body, described other end extension of the direction beyond the position relative by microstrip line on surface, microstrip line place with grounding metal plane, this bearing of trend forms the longitudinal axis direction of microstrip line, and the side direction to the longitudinal axis of microstrip line extends after definite length extended, and, continue to extend to contiguous relative position to direction with grounding metal plane with the grounding metal plane relative position on surface, microstrip line place after longitudinal axis one side definite length extended; And high frequency radiation body, this high frequency radiation body is extended by the direction of the described other end beyond the position relative with grounding metal plane of microstrip line on surface, microstrip line place, and to extend to the opposite side direction of the longitudinal axis of microstrip line after the microstrip line definite length extended be a plane, makes high frequency radiation body and low frequency radiation body lay respectively at the both sides of microstrip line longitudinal axis.When the present invention operates in IEEE802.11a agreement and IEEE802.11b agreement defined two frequency ranges, prolong low, high frequency radiation body by longitudinal axis to a side by the microstrip line beyond the grounding metal plane, so that U.S. Institute of Electrical and Electronics Engineers IEEE802.11a reaches an agreement on and the double frequency-band signal of IEEE802.11b agreement defined in order to receive respectively, its measurement demonstration really can be respectively in order to receive the double frequency-band signal.Not only can receive the different frequency range signal, and length is short, volume is little, thereby reaches purpose of the present invention.
Description of drawings
Fig. 1, be traditional Lecher line structural representation front view.
Fig. 2, be conventional dipole antenna structural representation front view.
Fig. 3, be traditional microstrip-type monopole antenna structure schematic isometric.
Fig. 4, be traditional microstrip-type monopole antenna structure schematic sectional view.
Fig. 5, be the embodiment of the invention one structural representation stereogram.
Fig. 6, be the embodiment of the invention two structural representation stereograms.
Fig. 7, be the embodiment of the invention one measurement schematic diagram.
Fig. 8, be the embodiment of the invention two measurement schematic diagrames.
Embodiment
Embodiment one
As shown in Figure 5, the present invention includes dielectric medium substrate 57, be printed on dielectric medium substrate 57 1 sides with an end as the microstrip line 54 of signal feed side 541 and be printed on the grounding metal plane 58 of dielectric medium substrate 57 another sides corresponding to microstrip line 54.
The other end of microstrip line 54 is to extending corresponding to locality beyond the grounding metal plane 58, and after definite length extended, extended low frequency radiation body 542 respectively and be the high frequency radiation body 543 on plane to both sides by its longitudinal axis.
Low frequency radiation body 542 is after definite length extended, to the position of continuing corresponding to grounding metal plane 58 directions to extend to corresponding to contiguous grounding metal plane 58.
For the high frequency radiation body 543 on plane can increase the high-frequency resonance frequency range.
So, low, high frequency radiation body 542,543 is respectively in order to receive the signal of different frequency range.
Embodiment two
As shown in Figure 6, the present invention includes dielectric medium substrate 67, be printed on dielectric medium substrate 67 1 sides and be fixed as the microstrip line 64 of 50 ohm (Ω) and be printed on the grounding metal plane 68 of dielectric medium substrate 67 another sides as 641 input impedance of signal feed side corresponding to microstrip line 64 with an end.
The other end of microstrip line 64 is to extending corresponding to locality beyond the grounding metal plane 68, and after definite length extended, extended low frequency radiation body 642 respectively and be the high frequency radiation body 643 on plane to homonymy by its longitudinal axis.
Low frequency radiation body 642 is after definite length extended, to continuing to extend to corresponding to the position that is close to grounding metal plane 68 corresponding to grounding metal plane 68 directions and keeping certain intervals.
For the high frequency radiation body 643 on plane can increase the high-frequency resonance frequency range, itself and low frequency radiation body 642 keep certain intervals.
So, low, high frequency radiation body 642,643 is respectively in order to receive the signal of different frequency range.
In the embodiment of the invention one (two), because low, high frequency radiation body 542,543 (or 642,643) is respectively in order to receiving the signal of different frequency range, thus, high frequency radiation body 542,543 (or 642,643) free-ended length low by extending to corresponding to grounding metal plane 58 (or 68) microstrip line 54 (or 64) in addition should be respectively and the different resonant frequencies that designs of antenna institute desire between have certain proportionate relationship.
It is the best with 1/4th length of each band wavelength in the two-band that equals institute's desire design approximately respectively that the present invention extends to low, the free-ended length of high frequency radiation body 542,543 (or 642,643) by grounding metal plane 58 (or 68) microstrip line 54 (or 64) in addition, with low, the high frequency radiation body of different length respectively in order to the double frequency-band signal of the defined that receives that U.S. Institute of Electrical and Electronics Engineers IEEE802.11a reaches an agreement on and IEEE802.11b reaches an agreement on.
As shown in Figure 5, microstrip line 54, low frequency radiation body 542, high frequency radiation body 543 and grounding metal plane 58 are printed and are about 0.8mm and dielectric coefficient to thickness and are about on 4.3～4.7 the tabular dielectric medium substrate 57 among the embodiment one, and the width of microstrip line 54 and low frequency radiation body 542 is about 1mm; The length of low frequency radiation body 542 is about 18mm.The area of high frequency radiation body 543 is about 80mm
2
As shown in Figure 7, the embodiment of the invention one operate in IEEE802.11a agreement and IEEE802.11b agreement defined 24～2,500,000,000 hertz (2.4～2.5GHz) and 51.5～58.5 hundred million hertz (during 5.15～5.85GHz) two frequency ranges, the measurement of surveying its return loss (Return Loss) is:
Hundred million hertz of △ 1:24 (2.4GHz);-14.2750 decibels (dB);
Hundred million hertz of △ 2:25 (2.5GHz);-15.601 decibels (dB);
Hundred million hertz of △ 3:51.5 (5.15GHz);-11.887 decibels (dB);
Hundred million hertz of △ 4:53.5 (5.35GHz);-20.362 decibels (dB);
Hundred million hertz of △ 5:58.5 (5.85GHz);-12.599 decibels (dB);
Promptly all be better than 11 decibels (dB).Therefore, show that plane formula double frequency mono-polar antenna of the present invention really can be respectively in order to receive the double frequency-band signal by these measurements.
As shown in Figure 6, microstrip line 64, low frequency radiation body 642, high frequency radiation body 64 3 and grounding metal plane 68 are printed and are about 0.8mm and dielectric coefficient to thickness and are about on 4.3～4.7 the tabular dielectric medium substrate 67 among the embodiment two, and the width of microstrip line 64 and low frequency radiation body 642 is about 1mm; The length of low frequency radiation body 642 is about 17mm; The area of high frequency radiation body 643 is about 77mm
2
As shown in Figure 8, the embodiment of the invention two operate in IEEE802.11a agreement and 2.32 hundred million hertz of (0.232GHz), 24～2,500,000,000 of IEEE802.11b agreement defined hertz (2.4～2.5GHz) and 51.5～58.5 hundred million hertz (during 5.15～5.85GHz) two frequency ranges, the measurement of surveying its return loss (Return Loss) is:
Hundred million hertz of △ 1:24 (2.4GHz);-11.841 decibels (dB);
Hundred million hertz of △ 2:25 (2.5GHz);-16.220 decibels (dB);
Hundred million hertz of △ 3:51.5 (5.15GHz);-25.878 decibels (dB);
Hundred million hertz of △ 4:58.5 (5.85GHz);-17.554 decibels (dB);
Hundred million hertz of △ 5:2.32 (0.2 32GHz);-0.16870 decibel (dB);
Promptly all be better than 11 decibels (dB).Therefore, show that plane formula double frequency mono-polar antenna of the present invention really can be respectively in order to receive the double frequency-band signal by these measurements.
Claims (2)
1. plane formula double frequency mono-polar antenna comprises:
A dielectric medium substrate;
A microstrip line is printed on dielectric medium substrate one surface, with an end of this microstrip line as the signal feed side; An end relative with this signal feed side of this little electric wire forms the other end of little electric wire;
A grounding metal plane be printed on dielectric medium substrate and another relative surperficial face of surface, microstrip line place, and the position of this grounding metal plane is relative with the position of microstrip line;
A low frequency radiation body, this low frequency radiation body is by other end extension of the direction beyond the position relative with grounding metal plane on surface, microstrip line place of microstrip line, this bearing of trend forms the longitudinal axis direction of microstrip line, and this low frequency radiation body side direction to the longitudinal axis of microstrip line after definite length extended extends, it is characterized in that
Described low frequency radiation body continues extend to contiguous with grounding metal plane relative position on surface, microstrip line place to the locality relative with grounding metal plane after longitudinal axis one side direction definite length extended; And
A high frequency radiation body, this high frequency radiation body on surface, microstrip line place by the described other end of microstrip line to the grounding metal plane relative position beyond direction extend, and after the microstrip line definite length extended, extend to the opposite side direction of microstrip line longitudinal axis and be the plane, make high frequency radiation body and low frequency radiation body lay respectively at the both sides of microstrip line longitudinal axis.
2. plane formula double frequency mono-polar antenna according to claim 1 is characterized in that, from the described other end of described microstrip line to low, the free-ended length of high frequency radiation body, equals 1/4th length of each band wavelength in the two-band of institute's desire design respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049052A CN100364171C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency monopole antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049052A CN100364171C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency monopole antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN1525595A CN1525595A (en) | 2004-09-01 |
| CN100364171C true CN100364171C (en) | 2008-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031049052A Expired - Fee Related CN100364171C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency monopole antenna |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170221B (en) * | 2006-10-25 | 2011-11-09 | 鸿富锦精密工业（深圳）有限公司 | MIMO antenna |
| CN101170218B (en) * | 2006-10-26 | 2012-05-09 | 连展科技电子（昆山）有限公司 | Coupling multi-frequency antenna |
| CN108511898A (en) * | 2018-03-28 | 2018-09-07 | 中国计量大学 | A kind of integrated bluetooth broad-band antenna of micro-strip |
| JP7041580B2 (en) * | 2018-04-24 | 2022-03-24 | 京セラ株式会社 | Antennas, module boards and modules |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926139A (en) * | 1997-07-02 | 1999-07-20 | Lucent Technologies Inc. | Planar dual frequency band antenna |
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2003
- 2003-02-28 CN CNB031049052A patent/CN100364171C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926139A (en) * | 1997-07-02 | 1999-07-20 | Lucent Technologies Inc. | Planar dual frequency band antenna |
Non-Patent Citations (1)
| Title |
|---|
| Dual-band F-Shaped Monopole Antenna for2.4/5.2GHzWLAN Application. Shih-Huang Yeh,Kin-Lu Wong.IEEE Antennas and Propagation Society International Symposium,Vol.4 . 2002 * |
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| Publication number | Publication date |
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| CN1525595A (en) | 2004-09-01 |
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Granted publication date: 20080123 Termination date: 20100228 |