CN1525596A - Plane double-frequency L-type antenna - Google Patents
Plane double-frequency L-type antenna Download PDFInfo
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- CN1525596A CN1525596A CNA031049060A CN03104906A CN1525596A CN 1525596 A CN1525596 A CN 1525596A CN A031049060 A CNA031049060 A CN A031049060A CN 03104906 A CN03104906 A CN 03104906A CN 1525596 A CN1525596 A CN 1525596A
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- 239000002184 metal Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000005855 radiation Effects 0.000 description 10
- 239000004020 conductor Substances 0.000 description 9
- 238000004891 communication Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The invention is a kind of plane double-frequency L type antenna. The invention provides an antenna with short length, small volume for receiving different frequency channel signal. It includes dielectric base board, a microstrip line/coplanar wave line which uses one end as signal feed-in port on one side surface of the dielectric and the ground metal surface correspondent to the microstrip line/coplanar wave line on the other side of the dielectric base board; the other end of microstrip line/ coplanar wave line extends to the direction out of the ground metal surface, and sets radiator along the shaft.
Description
Technical field
The invention belongs to antenna, particularly a kind of plane formula double frequency inverted-L antenna.
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 side, an end that utilizes microstrip line 24 is as signal feed side 241, the another side of dielectric medium substrate 27 then is printed with grounding metal plane 28 corresponding 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 as signal feed side 341, is printed with the grounding metal plane 38 that ground roll lead 34 together keeps certain intervals at co-planar waveguide line 34 peripheral positions of dielectric medium substrate 37 side correspondences.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 (IEEE) 802.11 Wireless LANs (Wireless Local Area Network) agreement, U.S.'s Institute of Electrical and Electronics Engineers (IEEE) 802.11 agreement systems formulate 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, U.S.'s Institute of Electrical and Electronics Engineers (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 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, 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 plane formula double frequency inverted-L antenna of receiving.
The present invention includes the dielectric medium substrate, be printed on dielectric medium substrate one side with an end as the microstrip line of signal feed side and be printed on the grounding metal plane of dielectric medium substrate another side corresponding to microstrip line; The other end of microstrip line is to extending corresponding to locality beyond the grounding metal plane, and extends radiant body by its longitudinal axis respectively to both sides.
Wherein:
Extend in microstrip line beyond the corresponding grounding metal plane equals each band wavelength in the two-band approximately respectively to the free-ended length of each radiant body 1/4th length.
Microstrip line is to being the strip that bends and extends into corresponding to locality beyond the grounding metal plane.
Microstrip line extends radiant body by its longitudinal axis diverse location respectively to both sides.
A kind of plane formula double frequency inverted-L antenna, it comprises the dielectric medium substrate and is printed on the dielectric medium substrate side surfaces with co-planar waveguide line, the grounding metal plane of an end as the signal feed side; Grounding metal plane corresponding to co-planar waveguide line peripheral position and together the ground roll lead keep certain interval; The co-planar waveguide line other end is to extending corresponding to locality beyond the grounding metal plane, and extends radiant body by its longitudinal axis respectively to both sides.
Extend in co-planar waveguide line beyond the corresponding grounding metal plane equals each band wavelength in the two-band approximately respectively to the free-ended length of each radiant body 1/4th length.
The co-planar waveguide alignment is the strip that bends and extends into corresponding to locality beyond the grounding metal plane.
The co-planar waveguide line extends radiant body by its longitudinal axis diverse location respectively to both sides.
Because the present invention includes the dielectric medium substrate, be printed on dielectric medium substrate one side with an end as the microstrip line/co-planar waveguide line of signal feed side and be printed on the grounding metal plane of dielectric medium substrate another side/side corresponding to microstrip line/co-planar waveguide line; The other end of microstrip line/co-planar waveguide line is to extending corresponding to locality beyond the grounding metal plane, and extends radiant body by its longitudinal axis respectively to both sides.Microstrip line of the present invention/co-planar waveguide line other end 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 to extending into corresponding to locality beyond the grounding metal plane and extending the long and short radiant body that differs respectively with as low, high frequency radiation body by its longitudinal axis to both sides.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, for the embodiment of the invention two structural representation stereograms (two radiant bodies are extended by diverse location).
Fig. 7, be the embodiment of the invention three structural representation stereograms.
Fig. 8, for the actual measurement of the present invention result schematic diagram.
Embodiment
Embodiment one
As shown in Figure 4, the present invention includes dielectric medium substrate 47, be printed on dielectric medium substrate 47 1 sides 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 sides corresponding to microstrip line 44.
The other end of microstrip line 44 is to extending straight into strip corresponding to locality beyond the grounding metal plane 48, and extend radiant body 442,443 respectively forming the plane formula double frequency inverted-L antenna that is T type framework to both sides, and make each radiant body 442,443 can be respectively in order to receive the signal of different frequency range by its longitudinal axis same position.
Because each radiant body 442,443 of the present invention is respectively in order to receive the signal of different frequency range, so each radiant body 442, the 443 free-ended length that is extended by the microstrip line 44 beyond the grounding metal plane 48 should have certain proportionate relationship respectively and between the different resonant frequencies of antenna desire design.
Microstrip line 44 extends to each radiant body 442,443 free-ended length beyond the grounding metal plane of the present invention 48, is the best with 1/4th length of each band wavelength in the two-band that equals institute's desire design approximately respectively.Wherein long radiant body 443 is as the low frequency radiation body; Short radiant body 442 is as the high frequency radiation body.So the radiant body 442,443 with different length can be 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.
Embodiment two
As shown in Figure 5, the present invention includes dielectric medium substrate 57 and be printed on dielectric medium substrate 57 sides 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 is to extending straight into strip corresponding to locality beyond the grounding metal plane 58, and extends radiant body 542,543 respectively to form the plane formula double frequency inverted-L antenna that is T type framework by its longitudinal axis same position to both sides; Also can make the other end of co-planar waveguide line extend radiant body 742,743 respectively to both sides according to actual needs or characteristic coupling as shown in Figure 6 by its longitudinal axis diverse location.Make each radiant body 542,543 or 742,743 can be respectively in order to receive the signal of different frequency range.
Because each radiant body 542,543 of the present invention is respectively in order to receive the signal of different frequency range, so each radiant body 542, the 543 free-ended length that is extended by the co-planar waveguide line 54 beyond the grounding metal plane 58 should have certain proportionate relationship respectively and between the different resonant frequencies of antenna desire design.
Co-planar waveguide line 54 extends to each radiant body 542,543 free-ended length beyond the grounding metal plane of the present invention 58, is the best with 1/4th length of each band wavelength in the two-band that equals institute's desire design approximately respectively.Wherein long radiant body 543 is as the low frequency radiation body; Short radiant body 542 is as the high frequency radiation body.So, each radiant body 542,543 of different length can be 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.
Embodiment three
As shown in Figure 7, the present invention includes dielectric medium substrate 67 and be printed on the co-planar waveguide line 64 and the grounding metal plane 68 of dielectric medium substrate 67 sides.
The dielectric coefficient of dielectric medium substrate 67 is about 4.3～4.7.
Grounding metal plane 68 corresponding to co-planar waveguide line 64 peripheral positions and together ground roll lead 64 keep certain interval.
One end of co-planar waveguide line 64 is as signal feed side 641, its other end bends and extends into strip to being the L type corresponding to locality beyond the grounding metal plane 68, and extends radiant body 642,643 respectively to form plane formula double frequency inverted-L antenna by its longitudinal axis same position to both sides.
Co-planar waveguide line 64, high frequency radiation body 642, low frequency radiation body 643 and grounding metal plane 68 are to print that to be about 0.8mm and dielectric medium coefficient to thickness be on 4.3～4.7 the tabular dielectric medium substrate 67; The width of co-planar waveguide line 64 and height, high frequency radiation body 642,643 is about 1mm; The length of low frequency radiation body 643 is about 15mm; The length of high frequency radiation body 642 is about 8mm; Co-planar waveguide line 64 extends grounding metal plane 68 and is about 7mm with the length of external position.
As shown in Figure 8, the present invention operate in 22.2381～28.6121 hundred million hertz (2.22381～2.86121GHz) and 49.4078～56.34 hundred million hertz (during 4.94078～5.634GHz) two frequency ranges, the measurement of surveying its return loss (Return Loss) is:
Hundred million hertz of Δ 1:56.34 (5.634GHz);-10.038 decibels (dB);
Hundred million hertz of Δ 2:49.4078 (4.94078GHz);-9.9321 decibels (dB);
Hundred million hertz of Δ 3:22.2381 (2.22381GHz);-10.149 decibels (dB);
Hundred million hertz of Δ 4:28.6121 (2.86121GHz);-9.6634 decibels (dB);
Hundred million hertz of Δ 5:52.5 (5.25GHz);-17.735 decibels (dB);
Promptly all be better than 9 decibels (dB).Therefore, show by this advanced person's measurement, plane formula double frequency inverted-L antenna of the present invention really can be 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.
Claims (8)
1, a kind of plane formula double frequency inverted-L antenna, it comprises the dielectric medium substrate, be printed on dielectric medium substrate one side with an end as the microstrip line of signal feed side and be printed on the grounding metal plane of dielectric medium substrate another side corresponding to microstrip line; The other end of microstrip line is to extending corresponding to locality beyond the grounding metal plane and extending radiant body; It is characterized in that describedly extending radiant body respectively to both sides by extending the microstrip line longitudinal axis of grounding metal plane with external position.
2, plane formula double frequency inverted-L antenna according to claim 1 is characterized in that described microstrip line beyond the corresponding grounding metal plane equals each band wavelength in the two-band approximately respectively to the free-ended length of each radiant body 1/4th length that extend in.
3, plane formula double frequency inverted-L antenna according to claim 1 is characterized in that described microstrip line is to being the strip that bends and extends into corresponding to locality beyond the grounding metal plane.
4, plane formula double frequency inverted-L antenna according to claim 1 is characterized in that described microstrip line extends radiant body by its longitudinal axis diverse location respectively to both sides.
5, a kind of plane formula double frequency inverted-L antenna, it comprises the dielectric medium substrate and is printed on the dielectric medium substrate side surfaces with co-planar waveguide line, the grounding metal plane of an end as the signal feed side; Grounding metal plane corresponding to co-planar waveguide line peripheral position and together the ground roll lead keep certain interval; The co-planar waveguide line other end is to extending corresponding to locality beyond the grounding metal plane and extending radiant body; It is characterized in that describedly extending radiant body respectively to both sides by extending the co-planar waveguide line longitudinal axis of grounding metal plane with external position.
6, plane formula double frequency inverted-L antenna according to claim 5 is characterized in that described co-planar waveguide line beyond the corresponding grounding metal plane equals each band wavelength in the two-band approximately respectively to the free-ended length of each radiant body 1/4th length that extend in.
7, plane formula double frequency inverted-L antenna according to claim 5 is characterized in that described co-planar waveguide alignment is the strip that bends and extends into corresponding to locality beyond the grounding metal plane.
8, plane formula double frequency inverted-L antenna according to claim 5 is characterized in that described co-planar waveguide line extends radiant body by its longitudinal axis diverse location respectively to both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049060A CN100394644C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency L-type antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031049060A CN100394644C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency L-type antenna |
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| Publication Number | Publication Date |
|---|---|
| CN1525596A true CN1525596A (en) | 2004-09-01 |
| CN100394644C CN100394644C (en) | 2008-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031049060A Expired - Fee Related CN100394644C (en) | 2003-02-28 | 2003-02-28 | Plane double-frequency L-type antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908672A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Microstrip antenna |
| US7924237B2 (en) | 2007-11-01 | 2011-04-12 | Asustek Computer Inc. | Antenna device |
| CN101394018B (en) * | 2007-09-20 | 2012-06-06 | 大同大学 | Feed-in circular polarized antenna of wide band co-plane wave-guide |
| US9270014B2 (en) | 2012-08-28 | 2016-02-23 | Acer Incorporated | Handheld electronic device |
Family Cites Families (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 |
| CA2200675C (en) * | 1997-03-21 | 2003-12-23 | Chen Wu | A printed antenna structure for wireless data communications |
| US6166694A (en) * | 1998-07-09 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Printed twin spiral dual band antenna |
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2003
- 2003-02-28 CN CNB031049060A patent/CN100394644C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394018B (en) * | 2007-09-20 | 2012-06-06 | 大同大学 | Feed-in circular polarized antenna of wide band co-plane wave-guide |
| US7924237B2 (en) | 2007-11-01 | 2011-04-12 | Asustek Computer Inc. | Antenna device |
| CN101908672A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Microstrip antenna |
| CN101908672B (en) * | 2009-06-02 | 2013-12-11 | 鸿富锦精密工业（深圳）有限公司 | Microstrip antenna |
| US9270014B2 (en) | 2012-08-28 | 2016-02-23 | Acer Incorporated | Handheld electronic device |
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| Publication number | Publication date |
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| CN100394644C (en) | 2008-06-11 |
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Granted publication date: 20080611 Termination date: 20160228 |