CN1967939B - Multifrequency antenna - Google Patents
Multifrequency antenna Download PDFInfo
- Publication number
- CN1967939B CN1967939B CN2005100952797A CN200510095279A CN1967939B CN 1967939 B CN1967939 B CN 1967939B CN 2005100952797 A CN2005100952797 A CN 2005100952797A CN 200510095279 A CN200510095279 A CN 200510095279A CN 1967939 B CN1967939 B CN 1967939B
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- antenna
- radiation arm
- radiation
- radiating element
- connecting portion
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Abstract
The invention relates to a multi-frequency antenna which comprises first antenna, second antenna, and shared ground part, wherein the first antenna has radiator, connector connecting the radiator and ground part, feedback point and shared ground part; the radiator comprises the first radiator relative to low frequency, the second and third radiators relative to high frequencies; the first and second antennas share one ground part, and symmetry arranged at two ends of ground part, to reduce the radiation blind area and improve quality.
Description
[technical field]
The present invention relates to a kind of antenna, relate in particular to a kind of multifrequency antenna that is used for WLAN communication device.
[background technology]
Along with the high speed development of mobile communication, people more and more wish to be equipped with a notebook computer or other portable terminal device just can insert Internet whenever and wherever possible.Wireless-access mode based on GPRS (General Packer RadioService, GPRS) and WLAN (Wireless Local Area Network, WLAN (wireless local area network)) has satisfied this demand of people to a certain extent.GPRS is the wireless network that wide area covers, and its message transmission rate is probably between 30Kbps-50Kbps, and WLAN is the wireless network that a local covers, and its message transmission rate can reach 11Mbps (based on 802.11b).People cooperate portable terminals such as notebook computer by selecting the different radio network interface card, insert Internet whenever and wherever possible.Because the WLAN message transmission rate can reach 11Mbps, therefore provide public WLAN high-speed data service at some hot zones (hotel, airport, coffee-house, commercial center, conference and exhibition center), automatically switch after leaving hot zones, connect by maintenance networks such as GPRS.
In wireless communication procedure, the antenna significant components that is absolutely necessary at the portable terminal device that the WLAN network interface card is installed, all can be furnished with the antenna that adapts to its working frequency range requirement.Communication product in the market has the trend of microminiaturization gradually, as the microminiaturization of mobile phone.And communication product is also integrated with other electronic product gradually, for example, communication device is located at notebook computer, personal digital assistant etc.
Along with the microminiaturization of communication apparatus, inevitably, Antenna Design is microminiaturization correspondingly also.And the solution of antenna microminiaturization in the prior art, has become ripe development field for example microstrip antenna, planar inverted-F antenna or the like, all is the technology that developed in response to the antenna microminiaturization.
In the prior art,, comprise Department of Radiation 2 ', grounding parts 4 ', coaxial cable 5 ' and the connecting portion 3 ' that connects Department of Radiation and grounding parts referring to a kind of multifrequency antenna 1 ' shown in Figure 1.Wherein Department of Radiation 2 ' comprises the first radiating element 2a ' and the second radiating element 2b ', the first radiating element 2a ' comprises that first radiation arm 20 ', second radiation arm 21 ' and the 3rd radiation arm 22 ', the second radiating element 2b ' comprise second radiation arm 21 ', the 3rd radiation arm 22 ' and the 4th radiation arm 23 '.First radiation arm 20 ', second radiation arm 21 ', the 3rd radiation arm 22 ', grounding parts 4 ', connecting portion 3 ' and coaxial cable 5 ' constitute first planar inverted F-antenna.Second radiation arm 21 ', the 3rd radiation arm 22 ', the 4th radiation arm 23 ', connecting portion 3 ', grounding parts 4 ' and coaxial cable 5 ' constitute second planar inverted F-antenna.First planar inverted F-antenna works in lower frequency, and second planar inverted F-antenna works in upper frequency.Yet,, have dead angle inevitably, so largely influenced the service behaviour of antenna though above-mentioned antenna adapts to the demand of antenna miniaturization development.
Therefore, be necessary to design a kind of antenna that had not only adapted to antenna miniaturization trend but also can obviously reduce dead angle.
[summary of the invention]
The object of the present invention is to provide a kind of simple in structurely, it is less to take up room, but the emission band broad, the multifrequency antenna that dead angle is less.
For achieving the above object, the present invention adopts following technical scheme: a kind of multifrequency antenna comprises the grounding parts of first antenna, second antenna and two antenna duplexers, wherein each antenna comprises having first radiating element that is applied to relative low frequency and be applied to second radiating element of relative high frequency and the Department of Radiation of the 3rd radiating element, connects the connecting portion and the feeder line of Department of Radiation and aforementioned grounding parts.
Compared to prior art, multifrequency antenna of the present invention utilizes two symmetrically arranged antennas of mirror image to form an antenna, can obviously reduce the dead angle of antenna, improves work quality.
[description of drawings]
Fig. 1 is the plan view of prior art planar inverted F-antenna.
Fig. 2 is a multifrequency antenna stereogram of the present invention.
Fig. 3 is a multifrequency antenna voltage standing wave ratio resolution chart of the present invention.
The electromagnetic radiation field pattern of X-Y horizontal polarization when Fig. 4 works in the 2.437GHz frequency for first antenna of multifrequency antenna of the present invention and second antenna.
The electromagnetic radiation field pattern of X-Y perpendicular polarization when Fig. 5 works in the 2.437GHz frequency for first antenna of multifrequency antenna of the present invention and second antenna.
The electromagnetic radiation field pattern of X-Y horizontal polarization when Fig. 6 works in the 5.725GHz frequency for first antenna of multifrequency antenna of the present invention and second antenna.
The electromagnetic radiation field pattern of X-Y perpendicular polarization when Fig. 7 works in the 5.725GHz frequency for first antenna of multifrequency antenna of the present invention and second antenna.
[embodiment]
See also Fig. 2, multifrequency antenna 1 of the present invention in the present embodiment is to be made by sheet metal, and it comprises the first antenna 1a, the second antenna 1b of two symmetric arrays and the grounding parts 2 that both share.
The first antenna 1a comprises Department of Radiation 10, grounding parts 2, feeder line (not shown) and connects the connecting portion 20 of Department of Radiation 10 and grounding parts 2.
Department of Radiation 10 comprises first radiating element 11, second radiating element 12 and the 3rd radiating element 13.First radiating element 11 comprises that first radiation arm, 101, the second radiating elements 12 comprise that second radiation arm, 102, the three radiating elements 13 comprise the 3rd radiation arm 103 and the 4th radiation arm 104.First radiation arm 101, the 3rd radiation arm 103 and connecting portion 20 are formed " ㄈ " shape structure.In addition, second radiation arm 102, the 3rd radiation arm 103 and the 4th radiation arm 104 are formed anti-" ㄈ " shape structure.First radiation arm 101 and second radiation arm 102 are positioned at same plane and form the first lengthwise sheet metal 3.The 3rd radiation arm 103 extends downwards perpendicular to first radiation arm 101 and second radiation arm 102 and from first, second radiation arm 101,102 junctions.The 4th radiation arm 104 extends perpendicular to the 3rd radiation arm 103 and from second radiation arm, the 102 lower end edges direction parallel with second radiation arm, 102 bearing of trends.The 4th radiation arm 104 is formed the second lengthwise sheet metal 4 with connecting portion 20.Grounding parts 2 comprises that first ground unit 21 and second ground unit, 22, the first ground units 21 extend and are wider than connecting portion 20, the second ground units 22 from connecting portion 20 is along extending the metallic plate of formation perpendicular to first ground unit, 21 directions.The first lengthwise sheet metal 3, the second lengthwise sheet metal 4 is parallel to each other and be positioned at same plane with first ground unit 21 of grounding parts 2.Between the first lengthwise sheet metal 3 and the second lengthwise sheet metal 4, be provided with first fluting, 7 and second fluting 8.First, second fluting 7,8 is roughly rectangular.The first lengthwise sheet metal 3, the 3rd radiation arm 103 and the second lengthwise sheet metal 4 are formed " worker " shape structure.
The feedback point 30 of feeder line is arranged at first radiation arm 101 and second radiation arm, 102 connections.First radiating element 11 is used for receiving or the emission low frequency signals; Second radiating element 12 is used for launching or the reception higher frequency signals.The 3rd radiating element 13 the frequency range of having expanded second radiating element 12 is set, and the 3rd radiating element 13 and second radiating element, 12 co-operation have increased the radiation intensity and the antenna gain of antenna.Certainly, in other execution mode, the feedback point 30 a certain positions that can also be arranged on the connecting portion 20, this moment, the radiation frequency range of each Department of Radiation 10 of antenna just changed to some extent, and when feedback point 30 was arranged on the 4th radiation arm 104 ends, this antenna just became two radiating elements.
The second antenna 1b is positioned at first ground unit, 21 other ends, and is identical with the first antenna 1a configuration and be mirror image with the first antenna 1a and be symmetrical arranged.The first antenna 1a and the second antenna 1b share a grounding parts 2, thereby two antennas are become one.
Second ground unit, 22 two ends of grounding parts 2 are extended two installation ends, 5,6, two installation ends 5,6 respectively and are formed a mounting plane.
Figure 3 shows that the voltage standing wave ratio test record figure of multifrequency antenna 1 of the present invention.Can find out antenna in the 2.3G-2.5GHz frequency band from kymogram, voltage standing wave ratio is all less than " 2 ", and above-mentioned frequency band has provided the bandwidth up to 200MHz, and this bandwidth has comprised the wireless communication bandwidth based on IEEE802.11b/g and bluetooth.Antenna is in the 4.8G-6GHz frequency band, and also all less than " 2 ", this frequency band has provided the bandwidth that is higher than 1G to voltage standing wave ratio, satisfies IEEE802.11a standard radio communication bandwidth (5.15-5.35GHz, 5.725-5.875GHz) fully.
See also Fig. 4 to shown in Figure 7 be the first antenna 1a of multifrequency antenna 1 of the present invention vertical and horizontal polarization electromagnetic radiation field pattern on X-Y plane when being respectively 2.437GHz with 5.725GHz with the second antenna 1b operating frequency, by test result as can be known, the average gain of multifrequency antenna 1 all can meet the demands under two kinds of operating frequencies.And by the first antenna 1a and the second antenna 1b symmetric arrays co-operation two antennas are supplied a gap mutually, the more independent antenna in blind area obviously reduces.
Claims (7)
1. multifrequency antenna, comprise first antenna, the grounding parts of second antenna and two antenna duplexers, it is characterized in that: each antenna comprises having first radiating element that is applied to relative low frequency and be applied to second radiating element of relative high frequency and the Department of Radiation of the 3rd radiating element, the connecting portion and the feeder line that connect Department of Radiation and aforementioned grounding parts, described first radiating element comprises first radiation arm, described second radiating element comprises second radiation arm, described the 3rd radiating element comprises the 3rd radiation arm and the 4th radiation arm, described feeder line is connected on first radiation arm and the second radiation arm connection or the connecting portion, described the 3rd radiating element has increased the frequency range of described second radiating element, and the radiation intensity and the gain of antenna have been increased with the second radiating element co-operation, described grounding parts comprises first ground unit and second ground unit, and described first antenna and mirror image identical with second antenna configuration is arranged at the opposite end of first ground unit.
2. multifrequency antenna as claimed in claim 1 is characterized in that: described the first, the 3rd radiation arm and connecting portion are formed " ㄈ " shape structure.
3. multifrequency antenna as claimed in claim 1 is characterized in that: described second radiation arm, the 3rd radiation arm and the 4th radiation arm are instead " ㄈ " shape.
4. multifrequency antenna as claimed in claim 1 is characterized in that: described second ground unit is vertical with first ground unit.
5. multifrequency antenna as claimed in claim 1 is characterized in that: described Department of Radiation, connecting portion and grounding parts are integrally formed by offering cell body in the metal plate-like portion.
6. multifrequency antenna as claimed in claim 1, it is characterized in that: described the 3rd radiation arm is perpendicular to first radiation arm and second radiation arm, and extend downwards from first radiation arm and the second radiation arm tie point place, vertical the 3rd radiation arm of the 4th radiation arm extends along the direction that is parallel to second radiation arm.
7. multifrequency antenna as claimed in claim 1 is characterized in that: described first, second, third, fourth radiation arm and connecting portion are formed " worker " shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100952797A CN1967939B (en) | 2005-11-04 | 2005-11-04 | Multifrequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100952797A CN1967939B (en) | 2005-11-04 | 2005-11-04 | Multifrequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1967939A CN1967939A (en) | 2007-05-23 |
| CN1967939B true CN1967939B (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100952797A Expired - Fee Related CN1967939B (en) | 2005-11-04 | 2005-11-04 | Multifrequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1967939B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740866B (en) * | 2008-11-27 | 2013-01-02 | 启碁科技股份有限公司 | Multi-frequency antenna for wireless communication device |
| CN101752674B (en) * | 2008-11-28 | 2012-11-28 | 富士康(昆山)电脑接插件有限公司 | Antenna assembly |
| CN102263324B (en) * | 2011-07-28 | 2016-05-18 | 群淂数码科技（上海）有限公司 | RFID antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050104788A1 (en) * | 2003-11-18 | 2005-05-19 | Chen-Ta Hung | Bracket-antenna assembly and manufacturing method of the same |
| CN2706885Y (en) * | 2004-05-13 | 2005-06-29 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency aerial |
-
2005
- 2005-11-04 CN CN2005100952797A patent/CN1967939B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050104788A1 (en) * | 2003-11-18 | 2005-05-19 | Chen-Ta Hung | Bracket-antenna assembly and manufacturing method of the same |
| CN2706885Y (en) * | 2004-05-13 | 2005-06-29 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency aerial |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1967939A (en) | 2007-05-23 |
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