CN100379083C - Plane double L-type double-frequency antenna - Google Patents
Plane double L-type double-frequency antenna Download PDFInfo
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- CN100379083C CN100379083C CNB031049079A CN03104907A CN100379083C CN 100379083 C CN100379083 C CN 100379083C CN B031049079 A CNB031049079 A CN B031049079A CN 03104907 A CN03104907 A CN 03104907A CN 100379083 C CN100379083 C CN 100379083C
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Abstract
The present invention relates to a plane double L-type double-frequency 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 / a coplanar waveguide line and a grounding metal surface, wherein the microstrip line / the coplanar waveguide 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 one side surface of the grounding metal surface corresponds to the microstrip line / the coplanar waveguide line; the other end of the microstrip line / the coplanar waveguide line extends towards a direction corresponding to the direction of position outside the grounding metal surface; the microstrip line / the coplanar waveguide line extends along a longitudinal axis towards one side to form a first radiant body in the shape of an inverse L; the grounding metal surface extends from position corresponding to the adjacent first radiant body towards position outside the grounding metal surface to form a second radiant body in the shape of an inverse L; certain interval is maintained between the first radiant body and the second radiant body.
Description
Technical field
The invention belongs to antenna, the double L-shaped dual-band antenna of particularly a kind of plane formula.
Background technology
As shown in Figure 1, employed inverted-L antenna comprises coaxial wire 10 and is sheathed on the metal ground connection flat board 18 of coaxial wire 10 1 ends on the traditional communication device.
The one end system of coaxial wire 10 is connected on the control circuit of radio communication device, with as the feed-in line, its other end and metal ground connection dull and stereotyped 18 is sheathed, and is connected with metal ground connection dull and stereotyped 18 with outer conductor 16, uses outer conductor 16 ground connection with coaxial wire 10.The other end of coaxial wire 10 is extended by inner wire 14 and is the L shape and extends to metal ground connection dull and stereotyped 18 conductor 12 outward, to have the radiant body that is the shape of falling L of certain proportion relation between the resonance frequency that forms length and antenna.This antenna generally is the single-frequency design.
As shown in Figure 2, traditionally, for making above-mentioned inverted-L antenna more compact, existing dealer is made in this kind antenna on the printed circuit board (PCB), to make the microstrip-type inverted-L antenna.
The microstrip-type inverted-L antenna has the dielectric medium substrate 27 that is printed with microstrip line 24 on the surface, an end that utilizes microstrip line 24 is as signal feed side 241, another surface of dielectric medium substrate 27 then is printed with grounding metal plane 28 with respect to the position of microstrip line 24, and makes the other end of microstrip line 24 have the radiant body that is the shape of falling L 242 that certain proportion concerns between the resonance frequency that extends length and antenna corresponding to the position beyond the grounding metal plane 28.This antenna generally also designs for single-frequency.
In addition, other has the dealer to utilize co-planar waveguide (Coplanar Wave Guide) as the feed-in line, so that this kind inverted-L antenna is made on the printed circuit board (PCB), to make co-planar waveguide formula inverted-L antenna.
As shown in Figure 3, co-planar waveguide formula inverted-L antenna has the dielectric medium substrate 37 that the side is printed with co-planar waveguide line 34, one end of co-planar waveguide line 34 is printed with the grounding metal plane 38 of ground roll lead 34 maintenance certain intervals together as signal feed side 341 at corresponding co-planar waveguide line 34 peripheral positions in dielectric medium substrate 37 surfaces.The other end of co-planar waveguide line 34 then extends to beyond the grounding metal plane 38, to have the radiant body that is the shape of falling L 342 of certain proportion relation between the resonance frequency that forms length and antenna.This antenna generally also designs for single-frequency.
Because the mobile communication product market demand heightens, make that the development of wireless telecommunications is more quick in recent years.In numerous wireless communication standards, the most noticeable person is U.S.'s Institute of Electrical and Electronics Engineers (hereinafter to be referred as IEEE) 802.11 Wireless LANs (Wireless Local Area Network) agreement, IEEE802.11 agreement system formulates in the period of 1997, agreement not only provides many unprecedented functions in the wireless telecommunications, one solution that can make the wireless product of various different labels be communicated with each other also is provided, and 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 IEEE 802.11a agreement and IEEE 802.11b agreement, regulation according to these two agreements, in the standard physical layer of expansion, its working band must be separately positioned on 500,000,000 hertz (5GHz) and 2.4 hundred million hertz (5GHz), so when radio communication product is desired to use these two kinds of wireless communication protocols simultaneously, the inverted-L antenna of aforementioned conventional 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 on radio communication product, so that these inverted-L antennas to be installed, causes the volume of radio communication product can't dwindle easily to meet compact designer trends.
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 double L-shaped dual-band antenna of plane formula of receiving.
The present invention includes the dielectric medium substrate, be printed on dielectric medium substrate one surface with an end as the microstrip line of signal feed side and be printed on the grounding metal plane of another surface of dielectric medium substrate with respect to microstrip line; The other end of microstrip line on the same plane of microstrip line to extending with respect to locality beyond the grounding metal plane, to form first radiant body, wherein: the other end of described microstrip line extends straight into strip, and extend to a side by the strip end, extend and form first radiant body to be the shape of falling L; Grounding metal plane extends second radiant body by being the shape of falling L to grounding metal plane with external position with respect to the contiguous first radiant body position on the same plane of grounding metal plane; Be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by grounding metal plane and keep certain intervals by microstrip line, can receive the double L-shaped dual-band antenna of plane formula of the signal of different frequency range with formation.
Wherein:
The length that the length of first radiant body equals 1/4th length, second radiant body of two-band medium and low frequency section wavelength equals 1/4th length of two-band medium-high frequency section wavelength.
Be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by grounding metal plane and be provided with in the opposite direction and keep certain intervals by microstrip line.
Be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by grounding metal plane by microstrip line with equidirectional setting and maintenance certain intervals.
The double L-shaped dual-band antenna of a kind of plane formula, it comprises the dielectric medium substrate and is printed on the same surface of dielectric medium substrate with co-planar waveguide line, the grounding metal plane of an end as the signal feed side; Grounding metal plane be in surround co-planar waveguide line peripheral position and together the ground roll lead keep certain interval; The co-planar waveguide line other end is locality extension beyond grounding metal plane on the same plane of co-planar waveguide line, to form first radiant body, wherein: the other end of described co-planar waveguide line extends straight into strip, and extend to a side by the strip end, extend and form first radiant body to be the shape of falling L; Grounding metal plane is second radiant body that fall L shape extend to grounding metal plane with external position by the contiguous first radiant body position on the same plane of grounding metal plane; Be first radiant body that the shape of falling L extends and grounding metal plane by the co-planar waveguide line and be second radiant body that the shape of falling L extends and keep certain intervals, to form the double L-shaped dual-band antenna of plane formula of the signal that can receive different frequency range.
The length of first radiant body equals 1/4th length of two-band medium and low frequency section wavelength; The length of second radiant body equals 1/4th length of two-band medium-high frequency section wavelength.
Being first radiant body that the shape of falling L extends and grounding metal plane by the co-planar waveguide line is second radiant body that the shape of falling L extends and is provided with in the opposite direction and keeps certain intervals.
Be first radiant body that the shape of falling L extends and grounding metal plane by the co-planar waveguide line and be second radiant body that the shape of falling L extends with the equidirectional setting and keep certain intervals.
Because the present invention includes the dielectric medium substrate, be printed on dielectric medium substrate one surface with an end as the microstrip line/co-planar waveguide line of signal feed side and be printed on the grounding metal plane of another surface of dielectric medium substrate/surface with respect to microstrip line/encirclement co-planar waveguide line; The other end of microstrip line/co-planar waveguide line is to extending straight into strip with respect to locality beyond the/grounding metal plane, and is first radiant body that the shape of falling L extends by the strip end to a side; Grounding metal plane is by being second radiant body that fall L shape extend to grounding metal plane with external position with respect to the/contiguous first radiant body position; First and second radiant body keeps certain intervals, to form the double L-shaped dual-band antenna of plane formula of the signal that can receive different frequency range.Microstrip line of the present invention/co-planar waveguide line other end to extend straight into respect to locality beyond the/grounding metal plane strip and by the strip end to a side be first radiant body that the shape of falling L extends and by grounding metal plane with respect to/be close to the first radiant body position and be second radiant body that the shape of falling L extends with external position to grounding metal plane, with respectively with as low, the high frequency radiation body is used respectively in order to receive the double frequency-band signal of U.S.'s Institute of Electrical and Electronics Engineers (IEEE) 802.11a agreement and U.S.'s Institute of Electrical and Electronics Engineers (IEEE) 802.11b agreement defined.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 known inverted-L antenna structural representation stereogram.
Fig. 2, be known microstrip-type inverted-L antenna structural representation stereogram.
Fig. 3, be known co-planar waveguide formula inverted-L antenna structural representation stereogram.
Fig. 4, be the embodiment of the invention one structural representation stereogram.
Fig. 5, be the embodiment of the invention two structural representation stereograms.
Fig. 6, be the embodiment of the invention three structural representation stereograms.
Fig. 7, be the embodiment of the invention four structural representation stereograms.
Fig. 8, be the embodiment of the invention five structural representation stereograms.
Fig. 9, be the actual result schematic diagrams that measure of the embodiment of the invention two.
Figure 10, be the actual result schematic diagram that measures of the embodiment of the invention one.
Embodiment
Embodiment one
As shown in Figure 4, the present invention includes dielectric medium substrate 47, be printed on dielectric medium substrate 47 1 surfaces with an end as the microstrip line 44 of signal feed side 441 and be printed on the grounding metal plane 48 of dielectric medium substrate 47 another surfaces with respect to microstrip line 44.
The other end of microstrip line 44 to extending straight into strip with respect to locality beyond the grounding metal plane 48, and extends first radiant body 442 that is the shape of falling L by its longitudinal axis to a side on microstrip line 44 same planes.
Because first and second radiant body 442,481 of the present invention is respectively in order to receive the signal of different frequency range, so the length of first and second radiant body 442,481 should have certain proportionate relationship respectively and between the different resonant frequencies of antenna desire design.
The length of first and second radiant body 442,481 of the present invention is the best with 1/4th length of each band wavelength in the two-band that equals institute's desire design approximately respectively.The first wherein long radiant body 442 is as the low frequency radiation body; The second short radiant body 481 is as the high frequency radiation body.So first and second radiant body 442,481 with different length can be respectively in order to receive the double frequency-band signal of IEEE 802.11a agreement and IEEE 802.11b agreement defined.
As shown in figure 10, the present invention operate in 24～2,500,000,000 hertz (2.4～2.5GHz) and 52.5～58.5 hundred million hertz (during 5.25～5.85GHz) two frequency ranges, the measurement of surveying its return loss (Return Loss) is:
Hundred million hertz of Δ 1:24 (2.4GHz);-15.076 decibels (dB);
Hundred million hertz of Δ 2:25 (2.5GHz);-19.642 decibels (dB);
Hundred million hertz of Δ 3:52.5 (5.25GHz);-10.254 decibels (dB);
Hundred million hertz of Δ 4:58.5 (5.85GHz);-11.199 decibels (dB);
Promptly all be better than 10 decibels (dB).Therefore, show that the double L-shaped dual-band antenna of plane formula of the present invention really can be respectively in order to receive the double frequency-band signal of IEEE 802.11a agreement and IEEE 802.11b agreement defined by these measurements.
Embodiment two
As shown in Figure 5, the present invention includes dielectric medium substrate 57 and be printed on dielectric medium substrate 57 same surfaces with the co-planar waveguide line 54 and the grounding metal plane 58 of an end as signal feed side 541.
The other end of co-planar waveguide line 54 on co-planar waveguide line 54 same planes beyond grounding metal plane 58 locality extend straight into strip, and extend first radiant body 542 that is the shape of falling L to a side by its longitudinal axis.
Co-planar waveguide line 54 of the present invention, first radiant body 542, second radiant body 581 and grounding metal plane 58 print that to be about 0.8mm and dielectric coefficient to thickness be the double L-shaped dual-band antenna of plane formula that goes out with actual fabrication on 4.3～4.7 the tabular dielectric medium substrate 57, and the width of its co-planar waveguide line 54, first radiant body 542 and second radiant body 581 is about 1mm; The length of first radiant body 542 is about 23mm; The length of second radiant body 581 is about 12mm.
As shown in Figure 9, the present invention operate in 23.5881～32.5241 hundred million hertz (2.35881～3.25241GHz) and 49.7438～55.0920 hundred million hertz (during 4.97438～5.50920GHz) two frequency ranges, the measurement of surveying its return loss (Return Loss) is:
Hundred million hertz of Δ 1:55.0920 (5.50920GHz);-9.9800 decibels (dB);
Hundred million hertz of Δ 2:49.7438 (4.97438GHz);-9.7437 decibels (dB);
Hundred million hertz of Δ 3:23.5881 (2.35881GHz);-9.8274 decibels (dB);
Hundred million hertz of Δ 4:32.5241 (3.25241GHz);-10.060 decibels (dB);
Hundred million hertz of Δ 5:52.5000 (5.25000GHz);-20.692 decibels (dB);
Promptly all be better than 9 decibels (dB).Therefore, show that the double L-shaped dual-band antenna of plane formula of the present invention really can be respectively in order to receive the double frequency-band signal of IEEE 802.11a agreement and IEEE 802.11b agreement defined by these measurements.
Among the present invention because first and second radiant body 542,581 is respectively in order to receiving the signal of different frequency range, so the length of first and second radiant body 542,581 should be respectively and the different resonant frequencies that designs of antenna desire between have certain proportionate relationship.The length of first and second radiant body 542,581 of the present invention is the best with 1/4th length of each band wavelength in the two-band that equals institute's desire design approximately respectively.The first wherein long radiant body 542 is as the low frequency radiation body; The second short radiant body 581 is as the high frequency radiation body.So, first and second radiant body 542,581 of different length can be respectively in order to receive the double frequency-band signal of IEEE 802.11a agreement and IEEE802.11b agreement defined.
Embodiment three
As shown in Figure 6, the present invention includes dielectric medium substrate 67 and be printed on dielectric medium substrate 67 same surfaces with the co-planar waveguide line 64 and the grounding metal plane 68 of an end as signal feed side 641.
Grounding metal plane 68 be in surround co-planar waveguide line 64 peripheral positions and together ground roll lead 64 keep certain interval.
The other end of co-planar waveguide line 64 on co-planar waveguide line 64 same planes beyond grounding metal plane 68 locality be the L type and bend and extend into strip, and extend first radiant body 642 that is the shape of falling L to a side by its longitudinal axis.
Grounding metal plane 68 is second radiant body 681 that fall L shape extend to grounding metal plane 68 with external position by contiguous first radiant body 642 positions on grounding metal plane 68 same planes.First and second radiant body 642,681 is with the equidirectional setting and keep certain intervals, to form the double L-shaped dual-band antenna of plane formula of the signal that can receive different frequency range.
Embodiment four
As shown in Figure 7, the present invention includes dielectric medium substrate 77, be printed on dielectric medium substrate 77 1 surfaces with an end as the microstrip line 74 of signal feed side 741 and be printed on the grounding metal plane 78 of dielectric medium substrate 77 another surfaces with respect to microstrip line 74.
The other end of microstrip line 74 bends and extends into strip to being the L type with respect to locality beyond the grounding metal plane 78 on microstrip line 74 same planes, and extends first radiant body 742 that is the shape of falling L to a side by its longitudinal axis.
Grounding metal plane 78 on grounding metal plane 78 same planes by being second radiant body 781 that the shape of falling L extends to grounding metal plane 78 with external position with respect to contiguous first radiant body 742 positions.First and second radiant body 742,481 is with the equidirectional setting and keep certain intervals, to form the double L-shaped dual-band antenna of plane formula of the signal that can receive different frequency range.
Embodiment five
As shown in Figure 8, the present invention includes dielectric medium substrate 87 and be printed on dielectric medium substrate 87 same surfaces with the co-planar waveguide line 84 and the grounding metal plane 88 of an end as signal feed side 841.
Grounding metal plane 88 be in surround co-planar waveguide line 84 peripheral positions and together ground roll lead 84 keep certain interval.
The other end of co-planar waveguide line 84 bends and extends into strip to being the L type corresponding to locality beyond the grounding metal plane 88 on the same plane of co-planar waveguide line 84, and extends first radiant body 842 that is the shape of falling L to a side by its longitudinal axis.
Grounding metal plane 88 is second radiant body 881 that fall L shape extend to grounding metal plane 88 with external position by contiguous first radiant body 842 positions on grounding metal plane 88 same planes.First and second radiant body 842,881 is provided with in the opposite direction and keeps certain intervals, to form the double L-shaped dual-band antenna of plane formula of the signal that can receive different frequency range.
Claims (8)
1. double L-shaped dual-band antenna of plane formula, it comprises dielectric medium substrate and the grounding metal plane of printing on the microstrip line of printing on the surface of dielectric medium substrate, another surface relative with a described surface at described dielectric medium substrate; Microstrip line with an end as the signal feed side, the other end of microstrip line on the same plane of microstrip line to extending, to form first radiant body with respect to locality beyond the grounding metal plane; The grounding metal plane position is with respect to microstrip line; The other end that it is characterized in that described microstrip line extends straight into strip, and is extended to a side by the strip end, extends formation first radiant body to be the shape of falling L; Grounding metal plane extends second radiant body by being the shape of falling L to grounding metal plane with external position with respect to the contiguous first radiant body position on the same plane of grounding metal plane; Be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by grounding metal plane and keep certain intervals by microstrip line, can receive the double L-shaped dual-band antenna of plane formula of the signal of different frequency range with formation.
2. the double L-shaped dual-band antenna of plane formula according to claim 1 is characterized in that the length of described first radiant body equals 1/4th length of two-band medium and low frequency section wavelength; The length of second radiant body equals 1/4th length of two-band medium-high frequency section wavelength.
3. the double L-shaped dual-band antenna of plane formula according to claim 1 is characterized in that describedly being first radiant body that the shape of falling L extends and being second radiant body that the shape of falling L extends by grounding metal plane and being provided with in the opposite direction and keeping certain intervals by microstrip line.
4. the double L-shaped dual-band antenna of plane formula according to claim 1 is characterized in that describedly being first radiant body that the shape of falling L extends and being second radiant body that the shape of falling L extends by grounding metal plane with equidirectional setting and maintenance certain intervals by microstrip line.
5. double L-shaped dual-band antenna of plane formula, it comprises the dielectric medium substrate and is printed on the same surface of dielectric medium substrate with co-planar waveguide line, the grounding metal plane of an end as the signal feed side; Grounding metal plane be in surround co-planar waveguide line peripheral position and together the ground roll lead keep certain interval; The co-planar waveguide line other end is locality extension beyond grounding metal plane on the same plane of co-planar waveguide line, to form first radiant body; The other end locality beyond grounding metal plane that it is characterized in that described co-planar waveguide line extends straight into strip, and is extended to a side by the strip end, extends formation first radiant body to be the shape of falling L; Grounding metal plane is second radiant body that fall L shape extend to grounding metal plane with external position by the contiguous first radiant body position on the same plane of grounding metal plane; Be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by grounding metal plane and keep certain intervals by the co-planar waveguide line, can receive the double L-shaped dual-band antenna of plane formula of the signal of different frequency range with formation.
6. the double L-shaped dual-band antenna of plane formula according to claim 5 is characterized in that the length of described first radiant body equals 1/4th length of two-band medium and low frequency section wavelength; The length of second radiant body equals 1/4th length of two-band medium-high frequency section wavelength.
7. the double L-shaped dual-band antenna of plane formula according to claim 5, it is characterized in that described be first radiant body that the shape of falling L extends and be second radiant body that the shape of falling L extends by the co-planar waveguide line by grounding metal plane be provided with in the opposite direction and keep certain intervals.
8. the double L-shaped dual-band antenna of plane formula according to claim 6 is characterized in that describedly being first radiant body that the shape of falling L extends and being second radiant body that the shape of falling L extends with the equidirectional setting and keep certain intervals by grounding metal plane by the co-planar waveguide line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049079A CN100379083C (en) | 2003-02-28 | 2003-02-28 | Plane double L-type double-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049079A CN100379083C (en) | 2003-02-28 | 2003-02-28 | Plane double L-type double-frequency antenna |
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| CN1525597A CN1525597A (en) | 2004-09-01 |
| CN100379083C true CN100379083C (en) | 2008-04-02 |
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| CNB031049079A Expired - Fee Related CN100379083C (en) | 2003-02-28 | 2003-02-28 | Plane double L-type double-frequency antenna |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005291B (en) * | 2007-01-19 | 2010-05-19 | 清华大学 | Double frequency plane two antenna system for mobile terminal |
| CN102142603A (en) * | 2010-01-29 | 2011-08-03 | 奇胜澳大利亚有限公司 | Dipole antenna |
| US10840608B2 (en) * | 2015-09-25 | 2020-11-17 | Intel Corporation | Waveguide antenna structure |
| CN206907920U (en) * | 2016-12-14 | 2018-01-19 | 深圳市道通智能航空技术有限公司 | A kind of unmanned plane of dual-band microstrip antenna and the application antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4746925A (en) * | 1985-07-31 | 1988-05-24 | Toyota Jidosha Kabushiki Kaisha | Shielded dipole glass antenna with coaxial feed |
| US6008774A (en) * | 1997-03-21 | 1999-12-28 | Celestica International Inc. | Printed antenna structure for wireless data communications |
| CN1299525A (en) * | 1998-02-23 | 2001-06-13 | 夸尔柯姆股份有限公司 | Uniplanar dual strip antenna |
-
2003
- 2003-02-28 CN CNB031049079A patent/CN100379083C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4746925A (en) * | 1985-07-31 | 1988-05-24 | Toyota Jidosha Kabushiki Kaisha | Shielded dipole glass antenna with coaxial feed |
| US6008774A (en) * | 1997-03-21 | 1999-12-28 | Celestica International Inc. | Printed antenna structure for wireless data communications |
| CN1299525A (en) * | 1998-02-23 | 2001-06-13 | 夸尔柯姆股份有限公司 | Uniplanar dual strip antenna |
Non-Patent Citations (2)
| Title |
|---|
| Low cost microstrip-fed dual frequency printed dipoleantennafor wireless communications. Young-Ho Suh,Kai Chang.Electronics Letters,Vol.Vol.36 No.No.14. 2000 * |
| Microstrip-fed quasi-yagi antenna with broadbandcharacteristics. Y.Qian,W.R.Deal,N.Kaneda and T.Itoh.Electronics Letters,Vol.Vol.34 No.No.23. 1998 * |
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