CN202259673U - Dual-frequency antenna - Google Patents
Dual-frequency antenna Download PDFInfo
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- CN202259673U CN202259673U CN2011203853578U CN201120385357U CN202259673U CN 202259673 U CN202259673 U CN 202259673U CN 2011203853578 U CN2011203853578 U CN 2011203853578U CN 201120385357 U CN201120385357 U CN 201120385357U CN 202259673 U CN202259673 U CN 202259673U
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Abstract
The utility model discloses a dual-frequency antenna. The dual-frequency antenna comprises a grounding component, a feed-in component and a first radiation component, wherein the grounding component is electrically connected with a ground end; the feed-in component is used for transmitting wireless signals at a first frequency band and a second frequency band; the first radiation component is used for transmitting and receiving the wireless signals at the first frequency band and comprises a first branch, a second branch and a third branch; the first branch is electrically connected with the feed-in component; the second branch is electrically connected with the first branch; one end of the third branch is electrically connected with the joint of the first branch and the second branch and the other end of the third branch is electrically connected with the grounding component; and a loop antenna is formed by the third branch and the first branch to become a second radiation component which is used for transmitting and receiving the wireless signal at the second frequency band. The dual-frequency antenna is suitable for a wireless communication system with dual-frequency transmission requirements, is good for saving space and can greatly increase the application scope of the dual-frequency antenna.
Description
Technical field
The utility model relates to a kind of dual-band antenna, refers to a kind of dual-band antenna that combines loop antenna and planar inverted F-antenna with the receiving and transmitting double frequency wireless signal especially.
Background technology
Electronic product with radio communication function like notebook computer, personal digital assistant (Personal Digital Assistant) etc., is launched or is received radio wave through antenna, transmitting or the exchange radio signal, and then the visit wireless network.Therefore, in order to let the user can visit cordless communication network more easily, the bandwidth of ideal antenna should increase in tolerance band as much as possible, and size then should reduce as far as possible, to cooperate the trend of electronic product volume-diminished.
In known technology, loop antenna (Loop Antenna) be a kind of on a plane electric conductor of coiled closed-curve shape, circular, square, the triangle of coiled etc. usually, its principle is similar with dipole antenna, also is resonance antenna.Please refer to Figure 1A, Figure 1A is the sketch map of a known loop antenna 10.Can know by Figure 1A; Loop antenna 10 is the circular ring-type electric conductors that are arranged on the x-y plane; It has the characteristics of slim (Low Profile), and applicable to the trend of electronic product volume-diminished, but loop antenna 10 flexibility in design is lower and be difficult for minification.
A kind of in addition common radio antenna is that (Planar Inverted F Antenna, PIFA), as its name suggests, its shape is similar to through " F " after rotation and the upset planar inverted F-antenna.Please refer to Figure 1B, Figure 1B is the sketch map of a known planar inverted F-antenna 12.In general, planar inverted F-antenna 12 mainly is made up of a radiation assembly 120, conductive pin 122,124 and 126 of feed-in assemblies.Can follow two kinds of routes during feed-in assembly 126 feed-in electric currents; First kind of route is electric current from feed-in assembly 126 flow through conductive pin 122 and conductive pin 124; Return a ground end at last; And second kind of route is from feed-in assembly 126 conductive pin 122 of flowing through, and transfers to a receiving terminal by radiation assembly 120 with the electromagnetic wave mode at last.Noticeable, in first kind of route,, therefore can not generate electromagnetic waves by resonance because the current direction in conductive pin 122 and the conductive pin 124 is just opposite; In second kind of route, the length that electric current is flowed through just satisfies 1/4th transmission electromagnetic wavelength, therefore is able to resonance and generates electromagnetic waves.
Planar inverted F-antenna is for the wireless communication system with big broadband demand, and (its bandwidth is still undesirable, and then limits its range of application for Wireless Local Area Networks, WLAN) system like WLAN.Therefore, how effectively to improve the bandwidth of antenna, become one of target that industry makes great efforts.
The utility model content
Therefore, the main purpose of the utility model promptly is to provide a kind of dual-band antenna.
The utility model discloses a kind of dual-band antenna, and this dual-band antenna comprises: a grounding assembly, this grounding assembly are electrically connected at a ground end; One feed-in assembly, this feed-in assembly is used for transmitting the wireless signal of one first frequency range and one second frequency range; One first radiation assembly, this first radiation assembly is used for receiving and dispatching the wireless signal of this first frequency range, and this first radiation assembly comprises: one first branch, this first branch is electrically connected at this feed-in assembly; And one second branch, this second branch is electrically connected at this first branch; And one the 3rd branch; One end of the 3rd branch is electrically connected at the intersection of this first branch and this second branch; The other end is electrically connected at this grounding assembly; The 3rd branch and this first branch form a loop antenna, and become one second radiation assembly, to receive and dispatch the wireless signal of this second frequency range.
The utility model is applicable to the wireless communication system with double frequency transmission demand; And each assembly can include the many places bending; Be beneficial to saving in space, in addition, dual-band antenna also is provided with matching component adaptability; In order to the matching condition of adjustment low frequency and high-frequency band, significantly promote the range of application of dual-band antenna.
Description of drawings
Figure 1A is the sketch map of a known loop antenna.
Figure 1B is the sketch map of a known planar inverted F-antenna.
Fig. 2 is the sketch map of the double frequency antenna of the utility model embodiment.
Fig. 3 is the sketch map of another dual-band antenna of the utility model embodiment.
Fig. 4 is the voltage standing wave ratio sketch map of the dual-band antenna of the utility model.
Fig. 5 is the antenna efficiency sketch map of the dual-band antenna of the utility model.
The primary clustering symbol description:
10 loop antennas
12 planar inverted F-antennas
120 radiation assemblies
122,124 conductive pins
126 feed-in assemblies
20,30 frequency antennas
200,300 grounding assemblies
202,302 feed-in assemblies
204,304 first radiation assemblies
2040,3,040 first branches
2042,3,042 second branches
206,306 the 3rd branches
208,310 second radiation assemblies
308 matching components
Mkr5, Mkr6, Mkr7 and Mkr8 gauge point
The VSWR voltage standing wave ratio
Embodiment
Please refer to Fig. 2, Fig. 2 is the sketch map of the double frequency antenna 20 of the utility model embodiment.Dual-band antenna 20 has double resonance mode, and it comprises a grounding assembly 200, a feed-in assembly 202, one first radiation assembly 204 and one second radiation assembly 208.Grounding assembly 200 is electrically connected at a ground end.First radiation assembly 204 is similar to a planar inverted F-antenna, and it is made up of one first branch 2040 and 2042 in one second branch.And second radiation assembly 208 is a loop antenna, and it is made up of first branch 2040 and 206 in one the 3rd branch.Hence one can see that, first radiation assembly 204 and second radiation assembly, 208 shared first branches 2040.And feed-in assembly 202 is electrically connected at first branch 2040, is used for transmitting or receiving the wireless signal of one first frequency range (low frequency) and one second frequency range (high frequency).
Therefore, dual-band antenna 20 can be considered combining of planar inverted F-antenna and loop antenna, is used for receiving and dispatching low frequency and high-frequency wireless signals respectively.In detail, first branch 2040 that first radiation assembly 204 comprises and second branch, 2042 length overalls are substantially equal to the quarter-wave of low frequency wireless signal, are used for receiving and dispatching the low frequency wireless signal.The 3rd branch 206 that second radiation assembly 208 comprises and first branch, 2040 length overalls are substantially equal to 1/2nd wavelength of high-frequency wireless signals, are used for receiving and dispatching high-frequency wireless signals.In addition, by the parameters such as link position of the size, the 3rd branch 206 and the grounding assembly 200 that change grounding assembly 200, also can adjust the matching condition of low frequency wireless signal and high-frequency wireless signals, to be applicable to the different radio transmission system.Likewise, the design and use of feed-in assembly 202 are all well known to those of ordinary skill in the artly, do not give unnecessary details at this.In fact; Demand according to different system or user; Those of ordinary skills can be according to the further characteristics such as size, material, position of adjustment first radiation assembly 204, second radiation assembly 208, feed-in assembly 202 and grounding assembly 200 of the dual-band antenna of the utility model 20; With the scope of application of raising dual-band antenna 20, and be not limited thereto.
Noticeable; The main spirit of the utility model is dual-band antenna 20 except constituting the main radiant body of planar inverted F-antenna through first branch 2040 and second branch 2042; Utilize first branch 2040 and the 3rd branch 206 to form loop antenna simultaneously,, solve the unfavorable problem of bandwidth that traditional planar inverted F-antenna exists to increase working frequency range; To be applicable to wireless communication system, like WLAN (WLAN) system with double frequency demand.In addition, the shape of each assembly of dual-band antenna 20, material etc. are not all limit to some extent.For instance, in Fig. 2, first branch 2040 and second branch 2042 comprise a bending respectively and L-shaped, and the 3rd branch 206 then is vertical to grounding assembly 200 extensions with the intersection of second branch 2042 by first branch 2040; Yet, be not limited thereto, as long as it is required to guarantee that the current path of first branch 2040 and second branch 2042 meets, and first branch 2040 and the 3rd branch 206 can correctly form loop antenna and get final product.
Please refer to Fig. 3, Fig. 3 is the sketch map of the double frequency antenna 30 of the utility model embodiment.Dual-band antenna 30 shown in Figure 3 has similar structure with dual-band antenna 20 shown in Figure 2; In detail, dual-band antenna 30 includes a grounding assembly 300, a feed-in assembly 302, one first radiation assembly 304, one second radiation assembly 310 and a matching component 308.Grounding assembly 300 is electrically connected at a ground end.First radiation assembly 304 is similar to a planar inverted F-antenna, and it is made up of one first branch 3040 and 3042 in one second branch.And second radiation assembly 310 is a loop antenna, and it is made up of first branch 3040 and 306 in one the 3rd branch.Therefore, first radiation assembly 304 and second radiation assembly, 310 shared first branches 3040.And feed-in assembly 302 is electrically connected at first branch 3040, is used for transmitting or receiving the wireless signal of one first frequency range (low frequency) and one second frequency range (high frequency).Matching component 308 is electrically connected at the 3rd branch 306, in order to increase the high frequency coupling.
The function mode of dual-band antenna 30 is similar to dual-band antenna 20, also is through the combining of planar inverted F-antenna and loop antenna, and comes to receive and dispatch respectively low frequency and high-frequency wireless signals; Therefore, the length overall of first branch 3040 and second branch 3042 is substantially equal to the quarter-wave of low frequency wireless signal, and the length overall of the 3rd branch 306 and first branch 3040 is substantially equal to 1/2nd wavelength of high-frequency wireless signals.Dual-band antenna 30 and dual-band antenna 20 differences are that first branch 3040, second branch 3042 and the 3rd branch 306 of dual-band antenna 30 comprise a plurality of bendings respectively, and have increased matching component 308, to save the space and to improve bandwidth of operation.Moreover; Be arranged at 306 in first branch 3040 and the 3rd branch on matching component 308 spaces; But be not limited thereto; Parameters such as the position of adaptability ground change matching component 308, size, material with the matching condition of adjustment dual-band antenna 30 in high-frequency band, satisfy different system or user's demand.
In addition, by the parameters such as link position of the size, the 3rd branch 306 and the grounding assembly 300 that change grounding assembly 300, also can adjust the matching condition of low frequency wireless signal and high-frequency wireless signals, to be applicable to the different radio transmission system.As for the design and use of feed-in assembly 302, should be well known to those of ordinary skill in the art, do not give unnecessary details at this.In fact; Demand according to different system or user; Those of ordinary skills can be according to the further characteristics such as size, material, position of adjustment first radiation assembly 304, second radiation assembly 310, feed-in assembly 302, grounding assembly 300 and matching component 308 of the dual-band antenna of the utility model 30; With the scope of application of raising dual-band antenna 30, and be not limited thereto.In addition; The dual-band antenna 30 of the utility model is only exemplarily parallel or vertical through each inter-module; Or increase to demand adaptation property/subtract the setting of bending place according to circumstances; In order to reaching the saving on the space, every identical purpose person who reaches the utility model also belongs to the category of the utility model.
Noticeable; The dual-band antenna 30 of the utility model is through planar inverted F-antenna and loop antenna; Increase working frequency range; To solve the unfavorable problem of bandwidth that traditional planar inverted F-antenna exists, to be applicable to wireless communication system, like WLAN (WLAN) system with double frequency demand.
Please refer to Fig. 4, Fig. 4 is voltage standing wave ratio (Voltage Standing Wave Ratio, the VSWR) sketch map of the dual-band antenna 30 of the utility model.As shown in Figure 4; In low frequency frequency range (2.4GHz-2.5GHz) and high-frequency band (5.15GHz-5.85GHz); 30 voltage standing wave ratioes that can provide of dual-band antenna are all less than 2; Even can reach voltage standing wave ratio less than 1.5 situation in particular low frequency or high-frequency band, the value of the VSWR shown in gauge point Mkr5, Mkr6, Mkr7 and Mkr8 is respectively 3.381,2.843,1.310 and 1.616, and the frequency that corresponds to is respectively 3.3GHz, 3.8GHz, 5.15GHz, 5.85GHz.In addition, please refer to Fig. 5, Fig. 5 is the antenna efficiency sketch map of the dual-band antenna 30 of the utility model.As shown in Figure 5; In low frequency frequency range (2.4GHz-2.5GHz); Dual-band antenna 30 can provide and surpass 50% efficiency of transmission; Even can be up to 60% efficiency of transmission in some particular frequency bands, as in high-frequency band (5.15GHz-5.85GHz), dual-band antenna 30 at least also can provide 50% efficiency of transmission nearly.Therefore; Simultaneously with reference to behind figure 4 and Fig. 5; Find that with being not difficult dual-band antenna 30 can realize stable transmission of wireless signals in low frequency and high-frequency band really, and satisfy in WLAN (WLAN) system transmission conditions to wireless transmission standards 802.11a/b/g/n.
In the embodiment of the utility model; Dual-band antenna is according to the design architecture of planar inverted F-antenna; The notion that combines loop antenna in addition; Except the trend that can cooperate the electronic product volume-diminished, the transmission of low frequency and high-frequency wireless signals also can be provided simultaneously, be beneficial to dual-band antenna and effectively be transmitted in the different radio transmission system.Therefore; Those of ordinary skills can modify and change according to actual demand; By setting up other matching components or changing its mode of connection; Produce the matching condition of different frequency range, reach the identical purpose person of the utility model, all belong to the category of the utility model in order to transmit low frequency and high-frequency wireless signals simultaneously.
Generally speaking, the dual-band antenna that the utility model provides is design basis with the planar inverted F-antenna, in conjunction with loop antenna, to be applicable to the wireless communication system with double frequency transmission demand; Simultaneously, each assembly can include the many places bending, is beneficial to saving in space.In addition, dual-band antenna also is provided with matching component adaptability, in order to the matching condition of adjustment low frequency and high-frequency band, significantly promotes the range of application of dual-band antenna.
The above is merely the preferred embodiment of the utility model, and every equivalent variations and modification of doing according to the scope of the utility model claims all should belong to the covering scope of the utility model.
Claims (7)
1. dual-band antenna, this dual-band antenna comprises:
One grounding assembly, this grounding assembly are electrically connected at a ground end; And
One feed-in assembly is characterized in that, this feed-in assembly is used for transmitting the wireless signal of one first frequency range and one second frequency range;
This dual-band antenna also comprises one first radiation assembly, and this first radiation assembly is used for receiving and dispatching the wireless signal of this first frequency range, and this first radiation assembly comprises:
One first branch, this first branch is electrically connected at this feed-in assembly; And
One second branch, this second branch is electrically connected at this first branch; And
One the 3rd branch; One end of the 3rd branch is electrically connected at the intersection of this first branch and this second branch; The other end is electrically connected at this grounding assembly; The 3rd branch and this first branch form a loop antenna, and become one second radiation assembly, to receive and dispatch the wireless signal of this second frequency range.
2. dual-band antenna as claimed in claim 1 is characterized in that this dual-band antenna also comprises a matching component, and this matching component is electrically connected at the 3rd branch.
3. dual-band antenna as claimed in claim 1 is characterized in that this matching component comprises at least one bending.
4. dual-band antenna as claimed in claim 1 is characterized in that, this first branch comprises at least one bending, and this at least one bending makes this first branch and the 3rd branch form this loop antenna.
5. dual-band antenna as claimed in claim 1 is characterized in that, this second branch comprises at least one bending.
6. dual-band antenna as claimed in claim 1 is characterized in that, the length overall of this first branch and this second branch is substantially equal to the quarter-wave of the wireless signal of this first frequency range.
7. dual-band antenna as claimed in claim 1 is characterized in that, the length overall of this first branch and the 3rd branch is substantially equal to 1/2nd wavelength of the wireless signal of this second frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203853578U CN202259673U (en) | 2011-10-12 | 2011-10-12 | Dual-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203853578U CN202259673U (en) | 2011-10-12 | 2011-10-12 | Dual-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202259673U true CN202259673U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203853578U Expired - Fee Related CN202259673U (en) | 2011-10-12 | 2011-10-12 | Dual-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202259673U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840252A (en) * | 2012-11-26 | 2014-06-04 | 联想(北京)有限公司 | Antenna apparatus and method for forming antenna apparatus |
| CN107785651A (en) * | 2016-08-31 | 2018-03-09 | 宏碁股份有限公司 | Electronic apparatus |
| WO2018082558A1 (en) * | 2016-11-01 | 2018-05-11 | 中兴通讯股份有限公司 | Antenna and communication terminal |
-
2011
- 2011-10-12 CN CN2011203853578U patent/CN202259673U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840252A (en) * | 2012-11-26 | 2014-06-04 | 联想(北京)有限公司 | Antenna apparatus and method for forming antenna apparatus |
| CN107785651A (en) * | 2016-08-31 | 2018-03-09 | 宏碁股份有限公司 | Electronic apparatus |
| WO2018082558A1 (en) * | 2016-11-01 | 2018-05-11 | 中兴通讯股份有限公司 | Antenna and communication terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20191012 |