CN2789949Y - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN2789949Y CN2789949Y CNU2005200573828U CN200520057382U CN2789949Y CN 2789949 Y CN2789949 Y CN 2789949Y CN U2005200573828 U CNU2005200573828 U CN U2005200573828U CN 200520057382 U CN200520057382 U CN 200520057382U CN 2789949 Y CN2789949 Y CN 2789949Y
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Abstract
The utility model discloses an external double-frequency antenna which comprises a first oscillator and a second oscillator which are both metal conductors of which one end of the first oscillator and the corresponding end of the second oscillator are connected in a non electrical method and are relatively arranged in alignment, a spiral oscillator which is a conductor spirally wound and arranged on the second oscillator and a coaxial cable which is arranged on the connecting position of the first oscillator and the second oscillator, wherein an inner core line of the coaxial cable is electrically connected with the second oscillator, a shielding layer of the coaxial cable is electrically connected with the first oscillator, both ends of the spiral oscillator are both electrically connected with the second oscillator, the length of the first oscillator and the length of the second oscillator are equal and are both equal to one quarter of the wave length of electromagnetic waves transported on the first oscillator and the second oscillator. The double-frequency antenna of the utility model is used for being matched with wireless communication electronic devices which use IEEE802.11a&b wireless communication protocol and has the advantages of large gain and wide working frequency band.
Description
Technical field
The utility model relates to a kind of antenna, particularly relates to a kind of and electronic installation and is used, and can satisfy IEEE802.11 a﹠amp; The external dual-band antenna of b.
Background technology
At present, the wireless LAN communication agreement mainly comprises IEEE 802.11b and two kinds of standards of 802.11a, they have become present mainstream standard, and obtained using very widely, wherein the working frequency range of 802.11b is mainly 2.4-2.5GHz, and the working frequency range of 802.11a is contained 5.15-5.85GHz.
Along with development of science and technology, it is more extensive that the use occasion of radio communication becomes, and the radio communication device that thereupon is developed use also increases greatly, and the agreement of radio communication also is developed, to satisfy the requirement of high-speed traffic.Simultaneously, in communicator, generally comprise an antenna that is used to communicate by letter, this antenna type is a lot, divide roughly two kinds according to the position of antenna and electronic installation relation: the one, be arranged at the external antenna of communicator shell, the one, be arranged at the built-in aerial of communicator inside.And the antenna of above-mentioned two types is the job requirements for the communication electronic equipment that satisfies different use occasions.Wherein, generally using built-in aerial mainly is to consider that the built-in aerial volume is little; Can be contained in electronic installation inside, be beneficial to the electronic installation use protection antenna of merely hitting, in order to avoid be damaged; Make electronic installation have portability etc. preferably simultaneously, such as the antenna that uses in the notebook host case.And external antenna generally is because antenna volume is not easy to be contained in electronic installation inside, and external antenna has directivity preferably, such as, the external antenna that uses on the radio network gateway, can adjust the direction of antenna at any time according to customer requirements, etc.
Nowadays, IEEE802.11a﹠amp; The b wireless communication protocol is widely used in the electronic installation of radio communication, and industry has had the multiple 802.11a﹠amp that can satisfy; The external antenna of b wireless communication protocol, but some external antenna gain is less, and working band is narrower.
Summary of the invention
The utility model has disclosed a kind of external dual-band antenna, with use IEEE802.11a﹠amp; Be used in the electronic equipment for wireless communication of b wireless communication protocol, this external dual-band antenna has gain greatly, the advantage that working band is wide.
External dual-band antenna of the present utility model is to adopt following technical scheme to realize: a kind of dual-band antenna, comprise: first, second oscillator, this first, second oscillator is metallic conductor, a wherein terminal terminal non-electric connection corresponding of this first oscillator with second oscillator, and be a straight line and be oppositely arranged; One helicon, be one in the shape of a spiral shape twine the conductor be arranged on above-mentioned second oscillator; Above-mentioned first, second oscillator connection is provided with a coaxial cable, and the internal core wire of this coaxial cable and above-mentioned second oscillator electrically connect, and the screen of above-mentioned coaxial cable and above-mentioned first oscillator electrically connect; Two ends that above-mentioned spiral shakes all electrically connect with above-mentioned second oscillator; Above-mentioned first oscillator and second oscillator length equate, are equal to it and upload 1/4th of transmission of electricity magnetic wave wavelength.
Owing to adopted as above technical scheme, external dual-band antenna of the present utility model can satisfy the requirement of the international standard of IEEE802.11a and 802.11b to antenna: voltage standing wave ratio (VSWR) is not more than 2.0; Average gain is greater than-5.0dBi; When frequency of utilization was 2.4G-2.5G, peak gain was not more than 3.0dBi; When frequency of utilization was 5.15G-5.85G, peak gain was not more than 5.0dBi.Therefore, this external dual-band antenna has preferable use value.
Description of drawings
Fig. 1 is the schematic diagram of external dual-band antenna of the present utility model.
Fig. 2 is the size schematic diagram of external dual-band antenna of the present utility model.
Fig. 3 is the resolution chart of the voltage standing wave ratio of external dual-band antenna of the present utility model.
Fig. 4 A and Fig. 4 B are respectively the horizontal polarization of external dual-band antenna of the present utility model when working in the 2.45GHz frequency and the electromagnetic radiation test schematic diagram of perpendicular polarization.
Fig. 5 A and Fig. 5 B are respectively the horizontal polarization of external dual-band antenna of the present utility model when working in the 5.35GHz frequency and the electromagnetic radiation test schematic diagram of perpendicular polarization.
Embodiment
As shown in Figure 1, be the schematic diagram of external dual-band antenna of the present utility model.This dual-band antenna 10 comprises first oscillator 110 and second oscillator 120 that is provided with in horizontal direction, and coats the helicon 130 that is arranged on second oscillator 120; Wherein, above-mentioned first oscillator 110, second oscillator 120 and helicon 130 are conductor, and a wherein terminal end corresponding with second oscillator 120 of above-mentioned first oscillator 110 is fixedly connected.
Between above-mentioned first oscillator 110 and second oscillator 120 is not direct electric connection, and it is electrically connected by coaxial cable 140 between the two.Wherein, above-mentioned coaxial cable 140 comprises internal core wire 141 and screen 142; And be provided with an insulating barrier (not shown) between internal core wire 141 and the screen 142, make internal core wire 141 and screen 142 electrical isolation; And the outermost layer of screen 142 also is provided with an insulating barrier (not shown), makes the screen 142 and the external world be able to electrical isolation.Above-mentioned first oscillator 110 and second oscillator, 120 connections, the internal core wire 141 of above-mentioned coaxial cable 140 electrically connects with above-mentioned second oscillator 120; And the screen 142 of above-mentioned coaxial cable 140 electrically connects with above-mentioned first oscillator 110.
Above-mentioned helicon 130 is one to be the conductor that the center is wound in spiral with above-mentioned second oscillator 120, and first, second of this helicon 130 terminal 131 and 132 all directly electrically connects with above-mentioned second oscillator 120.Wherein, form the straight number of turn of the conductor of this helicon 130, spiral through the pitch between, two adjacent spirals, helicon 130 directly through etc., all be the key factor when influence this helicon 130 and working.Wherein, the conductor of forming this helicon 130 directly influences the working band of this helicon 130 through meeting; Pitch can influence operating frequency, specifically is that pitch is big more, and operating frequency is high more; Pound number and also can influence operating frequency; Spiral directly influence operating frequency through meeting, specifically be that diameter is big more, operating frequency is low more.
Above-mentioned first oscillator 110 and second oscillator, 120 equal in length are 1/4th of electromagnetic wavelength in its operating frequency.And first oscillator 110 and second oscillator 120 work in the frequency range of IEEE802.11a.And above-mentioned first oscillator 110 works in the frequency range of IEEE802.11b with above-mentioned helicon 130.Wherein, when above-mentioned first oscillator 110 and second oscillator 120 worked in the frequency range of IEEE802.11a, its operation principle was the half-wave doublet antenna, and the antenna industry of this structure has more use, was not describing in detail at this; And above-mentioned first oscillator 110 passes through the first 121 of above-mentioned second oscillator 120 (that is: among Fig. 1, on above-mentioned second oscillator 120, be positioned at the left-hand component of first end 131 of above-mentioned helicon 130 relatively) with after above-mentioned helicon 130 is connected, work in the frequency range of IEEE 802.11b.
Wherein, the concrete parameter of a specific embodiment of the utility model antenna is seen Fig. 2, and the long measure among this figure is a millimeter.Above-mentioned first oscillator 110 and second oscillator, 120 equal in length are 25 millimeters; The horizontal length of above-mentioned helicon 130 is 2.8 millimeters; In the above-mentioned helicon 130, the pitch between two adjacent spirals is 0.8 millimeter; In the above-mentioned helicon 130, each spiral directly through all equating, be 3 millimeters.
And first 121 on above-mentioned second oscillator 120 and second portion 122 are (that is: among Fig. 1, on above-mentioned second oscillator 120, be positioned at the right-hand component of second end 132 of above-mentioned helicon 130 relatively) length, can be used for the concrete frequency that the dual-band antenna in the utility model 10 works in the frequency range of IEEE802.11b is finely tuned.
Fig. 3 is voltage standing wave ratio (Voltage Standing WaveRatio, resolution chart VSWR) of dual-band antenna 10 of the present utility model.By the test result of this figure as can be seen, when this antenna 20 is operated in frequency range and is respectively 2.4-2.5GHz and 5.15-5.85GHz, the voltage standing wave ratio VSWR of this dual-band antenna 10 is not more than 2, as this resolution chart label is 1,2,3,4 indicate, wherein, label 1 expression, voltage standing wave ratio when frequency is 2.4GHz is 1.53, voltage standing wave ratio when label 2 expression frequencies are 2.5GHz is 1.37, voltage standing wave ratio when label 3 expression frequencies are 5.725GHz is 1.57, label 4 expressions, the voltage standing wave ratio when frequency is 5.85GHz is 1.41, so satisfy IEEE802.11a﹠amp; The b consensus standard to antenna in the working frequency range scope, voltage standing wave ratio otherwise greater than 2.0 requirement.
Fig. 4 A and Fig. 4 B are respectively the horizontal polarization of external dual-band antenna of the present utility model when working in the 2.45GHz frequency and the electromagnetic radiation test schematic diagram of perpendicular polarization.Fig. 5 A and Fig. 5 B are respectively the horizontal polarization of external dual-band antenna of the present utility model when working in the 5.35GHz frequency and the electromagnetic radiation test schematic diagram of perpendicular polarization.Wherein, in the resolution chart, each lattice is expressed as 3dB.This test shows, dual-band antenna 10 of the present utility model can satisfy the omnibearing directivity requirement of antenna, and dual-band antenna of the present utility model 10 can satisfy the requirement of the international standard of IEEE802.11a and 802.11b to antenna: voltage standing wave ratio (VSWR) is not more than 2.0; Average gain is greater than-5.0dBi; When frequency of utilization was 2.4G-2.5G, peak gain was not more than 3.0dBi; When frequency of utilization was 5.15G-5.85G, peak gain was not more than 5.0dBi.Therefore, this external dual-band antenna has preferable use value.
Claims (3)
1. a dual-band antenna is characterized in that, comprising: first, second oscillator, and this first, second oscillator is metallic conductor, a wherein terminal terminal non-electric connection corresponding of this first oscillator with second oscillator, and be a straight line and be oppositely arranged; One helicon, be one in the shape of a spiral shape twine the conductor be arranged on above-mentioned second oscillator; Above-mentioned first, second oscillator connection is provided with a coaxial cable, and the internal core wire of this coaxial cable and above-mentioned second oscillator electrically connect, and the screen of above-mentioned coaxial cable and above-mentioned first oscillator electrically connect.
2. dual-band antenna as claimed in claim 1 is characterized in that, two ends that above-mentioned spiral shakes all electrically connect with above-mentioned second oscillator.
3. dual-band antenna as claimed in claim 1 is characterized in that, above-mentioned first oscillator and second oscillator length equate, are equal to it and upload 1/4th of transmission of electricity magnetic wave wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200573828U CN2789949Y (en) | 2005-04-26 | 2005-04-26 | Double-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200573828U CN2789949Y (en) | 2005-04-26 | 2005-04-26 | Double-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789949Y true CN2789949Y (en) | 2006-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200573828U Expired - Fee Related CN2789949Y (en) | 2005-04-26 | 2005-04-26 | Double-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789949Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011116522A1 (en) * | 2010-03-24 | 2011-09-29 | 海能达通信股份有限公司 | Whip dual-band antenna |
| CN104185453A (en) * | 2011-12-29 | 2014-12-03 | 皇家飞利浦有限公司 | Electrosurgical ablation apparatus |
-
2005
- 2005-04-26 CN CNU2005200573828U patent/CN2789949Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011116522A1 (en) * | 2010-03-24 | 2011-09-29 | 海能达通信股份有限公司 | Whip dual-band antenna |
| CN104185453A (en) * | 2011-12-29 | 2014-12-03 | 皇家飞利浦有限公司 | Electrosurgical ablation apparatus |
| CN104185453B (en) * | 2011-12-29 | 2017-02-22 | 皇家飞利浦有限公司 | Electrosurgical ablation apparatus |
| US10448996B2 (en) | 2011-12-29 | 2019-10-22 | Koninklijke Philips N.V. | Electrosurgical ablation apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 Termination date: 20120426 |