CN2909557Y - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN2909557Y CN2909557Y CNU2005200554776U CN200520055477U CN2909557Y CN 2909557 Y CN2909557 Y CN 2909557Y CN U2005200554776 U CNU2005200554776 U CN U2005200554776U CN 200520055477 U CN200520055477 U CN 200520055477U CN 2909557 Y CN2909557 Y CN 2909557Y
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Abstract
The utility model discloses a dual-frequency antenna with double layer inverse F structure, including a first and second radiation parts, base plate and connecting part connecting the first and second radiation parts with the base plate. The first and second radiation parts lie in different planes of one side of the base plate and a specific gap is formed among the first radiation part, the second radiation part and the base plate to form resonance frequency magnetic field, as well as the first and second radiation parts, respectively with the connecting part comprise the inverse F antenna. The first and second radiation parts respectively work for the first and second frequency band and the length of the first and second radiation parts respectively accorded with the wavelength proportion of a specific frequency in the first and second frequency bands. The antenna chooses work frequency and bandwidth by setting the double-layer inverse F structure and an appropriate clearance, thus carrying out an antenna which can work under higher frequency band and has wider work bandwidth, as well as a simple structure.
Description
Technical field
The utility model relates to a kind of dual-band antenna, particularly a kind of double-deck reversed F-typed dual-band antenna that is adapted in the electronic equipment.
Background technology
At present, the wireless LAN communication agreement mainly comprises IEEE 802.11b and two kinds of standards of 802.11a, and they have become present mainstream standard, and has 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 mainly contained 5.15-5.35GHz.
Microstrip antenna and slot aerial are usually used in because of the characteristic being convenient to hide resembling in the portable electronic installation with radio communication such as notebook computer.Related art can be published August calendar year 2001 with reference to publishing house of Xian Electronics Science and Technology University, by " wireless and electric wave " teaching material of Zhou Dynasty, Wang Yuankun, Yang Enyao chief editor, this book 152-178 page or leaf has a detailed description microstrip antenna and slot aerial correlation theory.
Planar inverted F-shape antenna is a recent mobile communication equipment a kind of desirable miniaturization built-in aerial commonly used.But, if with antenna planeization and miniaturization, may make this existing antenna have the narrower shortcoming of bin width, and higher operating frequency can make bandwidth reduce, frequency and bandwidth are not easy to take into account simultaneously.Therefore, electronic installation is short and small in order to satisfy, the radio communication requirement of portable development, need a kind of flat plane antenna, select operating frequency and bandwidth by a suitable gap, and operating frequency can satisfy IEEE802.11b and 802.11a and bluetooth (B1uetooth) technology (operating frequency is 2.4GHz), and has the bin width of broad can be operated in high-frequency the time.In addition, flat plane antenna also need have advantage simple in structure, easy to manufacture even easy for installation.
Summary of the invention
The purpose of this utility model is to provide a kind of dual-band antenna with higher operational frequency and broad operational frequency bandwidth, and this dual-band antenna can satisfy the requirement of IEEE 802.11b and two kinds of standards of 802.11a fully.
The purpose of this utility model is achieved through the following technical solutions: the connecting portion that this dual-band antenna comprises first, second Department of Radiation, substrate and connects above-mentioned first, second Department of Radiation and substrate, wherein said first, second Department of Radiation is the described substrate in position wherein in the Different Plane of a side all, and all form certain slit between described first, second Department of Radiation and the described substrate three and form resonance frequency magnetic field, and described first, second Department of Radiation constitutes inverted F shaped antenna with connecting portion respectively; Above-mentioned first, second Department of Radiation works in first, second frequency range respectively, and the length of described first, second Department of Radiation corresponds respectively to the wavelength ratio of a characteristic frequency in above-mentioned first, second frequency range.
Particularly, described dual-band antenna also comprises a feeder line, this feeder line has internal core wire and screen, wherein a wherein end of above-mentioned internal core wire is electrically connected at the junction of above-mentioned first Department of Radiation and above-mentioned connecting portion, and a wherein end of above-mentioned screen is electrically connected at the junction of aforesaid substrate and above-mentioned connecting portion.
Compared with prior art, dual-band antenna of the present utility model is by being set to double-deck reversed F-typed structure, and select operating frequency and bandwidth by a suitable gap, thereby realized a kind of antenna that can be operated in higher frequency band and have the broad bandwidth of operation, and have concurrently simple in structure, advantage easy to manufacture, easy for installation.
Description of drawings
Figure 1A is the schematic diagram of the utility model dual-band antenna first embodiment.
Figure 1B is the schematic diagram of the utility model dual-band antenna second embodiment.
Fig. 2 is the dimensional drawing of dual-band antenna shown in Figure 1A.
Fig. 3 is the schematic diagram of the fixed structure of dual-band antenna shown in Figure 1A.
Fig. 4 is the voltage standing wave ratio test resolution of dual-band antenna shown in Figure 1A.
Fig. 5 A and Fig. 5 B are respectively the electromagnetic radiation resolution charts of horizontal direction and the vertical direction when working in the 2.45GHz frequency of dual-band antenna shown in Figure 1A.
Fig. 6 A and Fig. 6 B are respectively the electromagnetic radiation resolution charts of horizontal direction and the vertical direction when working in the 5.25GHz frequency of dual-band antenna shown in Figure 1A.
Embodiment
Dual-band antenna of the present utility model is shown in Figure 1A and Figure 1B.This antenna 10 comprises first Department of Radiation 110, second Department of Radiation 120, substrate 130, and is connected in the connecting portion 140 between above-mentioned first Department of Radiation 110, second Department of Radiation 120 and the aforesaid substrate 130.Wherein, first Department of Radiation 110 and second Department of Radiation 120 lay respectively in the Different Plane of substrate 130 the same sides, and first Department of Radiation 110, second Department of Radiation 120 and substrate 130 the threes plane at place respectively form three layers of stereochemical structure that is parallel to each other, simultaneously, this first Department of Radiation 110, second Department of Radiation 120 and substrate 130 threes are connected in one by above-mentioned connecting portion 140.And above-mentioned first Department of Radiation 110 forms inverted F shaped antenna with above-mentioned connecting portion 140; And above-mentioned second Department of Radiation 120 forms inverted F shaped antenna with above-mentioned connecting portion 140.
And, above-mentioned first Department of Radiation 110 and second Department of Radiation 120 are a long strip type sheet metal, the one end is connected with connecting portion 140 respectively, and all form a gap between above-mentioned first Department of Radiation 110 and second Department of Radiation 120 and substrate 130 threes, thereby form a resonance frequency magnetic field, select rational resonance frequency magnetic field to make antenna 10 be operated in certain frequency range by selecting the gap between the above-mentioned three.
In the dual-band antenna 10 of first embodiment of the utility model shown in Figure 1A, the resonance frequency magnetic field the when gap between above-mentioned second Department of Radiation 120 and the aforesaid substrate 130 forms these second Department of Radiation, 120 work; And between above-mentioned first Department of Radiation 110 and above-mentioned second Department of Radiation 120, and between above-mentioned first Department of Radiation 110 and the aforesaid substrate 130, the resonance frequency magnetic field when comprehensively forming these first Department of Radiation, 110 work.
In the dual-band antenna 10 of second embodiment of the utility model shown in Figure 1B, the resonance frequency magnetic field the when gap between above-mentioned first Department of Radiation 110 and the aforesaid substrate 130 forms these first Department of Radiation, 110 work; And between above-mentioned second Department of Radiation 120 and above-mentioned first Department of Radiation 110, and between above-mentioned second Department of Radiation 120 and the aforesaid substrate 130, the resonance frequency magnetic field when comprehensively forming these second Department of Radiation, 120 work.
Simultaneously, above-mentioned first Department of Radiation 110 works in first frequency range, and above-mentioned second Department of Radiation 120 works in second frequency range, and the length of above-mentioned first, second Department of Radiation corresponds respectively to the wavelength ratio of the characteristic frequency in above-mentioned first, second frequency range.
Above-mentioned first frequency range is the 5.15-5.35GHz of IEEE 802.11a, and the 2.4-2.5GHz that above-mentioned second frequency range is IEEE802.11b.
In addition, antenna 10 of the present utility model also comprises a feeder line 20, as shown in Figure 1A.This feeder line 20 is generally coaxial cable, comprises internal core wire 210 and screen 220.And between this internal core wire 210 and the screen 220, and between this screen 220 and the external world around it, include an insulating medium layer (not shown).To be example among Figure 1A, an end of this screen 220 is electrically connected at aforesaid substrate 130 and above-mentioned connecting portion 140 junctions, and the other end of this screen 220 and the earth element on the electronic installation electrically connect; One end of above-mentioned internal core wire 210 is electrically connected at above-mentioned connecting portion 140 and above-mentioned first Department of Radiation 110 junctions, and the microwave receiving on the other end of above-mentioned internal core wire 210 and the electronic installation/transmitting element electrically connects.
Fig. 2 is the concrete size schematic diagram of dual-band antenna shown in Figure 1A.Long measure is millimeter (mm) among the figure.Wherein, first Department of Radiation 110 is 11.2mm, second Department of Radiation 120 is 21.2mm, and the slit between first Department of Radiation 110 and second Department of Radiation 120 is 0.5mm, and the slit between second Department of Radiation 120 and the substrate 130 is 3.5mm, and the length of substrate 130 is not less than the length of above-mentioned second Department of Radiation 120.
Fig. 3 is for being the schematic diagram of an embodiment of the fixed structure of dual-band antenna shown in Figure 1A, and by the two ends at substrate 130 fixed part being set is fixed in electronic installation inside with this antenna 10, does not describe in detail at this.
Fig. 4 is voltage standing wave ratio (Voltage Standing WaveRatio, the VSWR) test resolution of dual-band antenna shown in Figure 1A.By among this figure as can be seen, when frequency range 2.4-2.5GHz and frequency range 5.15-5.35GHz, the voltage standing wave ratio of antenna 10 of the present utility model (VSWR) is all less 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 1.64, voltage standing wave ratio when label 2 expression frequencies are 2.5GHz is 1.42, voltage standing wave ratio when label 3 expression frequencies are 5.15GHz is 1.34, label 4 expressions, and the voltage standing wave ratio when frequency is 5.35GHz is 1.5, so satisfy IEEE 802.11a and 802.11b consensus standard to antenna in the working frequency range scope, voltage standing wave ratio otherwise greater than 2.0 requirement.
Simultaneously, shown in Fig. 5 A and Fig. 5 B, be the horizontal polarization of the antenna of the utility model shown in Figure 1A 10 when working in 2.45GHz and the electromagnetic radiation test schematic diagram of perpendicular polarization.And shown in Fig. 6 A and Fig. 6 B, be the horizontal polarization of the antenna of the utility model shown in Figure 1A 10 when working in 5.25GHz and the electromagnetic radiation test schematic diagram of perpendicular polarization.Above-mentioned this test result figure shows that the utility model antenna 10 has good directivity, and its gain can meet IEEE 802.11a and the 802.11b requirement to antenna gain fully.And antenna 10 of the present utility model has the good operation bandwidth.
In sum, dual-band antenna of the present utility model is by being set to double-deck inverted F shaped antenna, and passes through Operating frequency and bandwidth are selected in a suitable gap, thereby have realized a kind ofly can being operated in higher frequency band And have the antenna of wider bandwidth of operation, and have advantage simple in structure, easy to manufacture concurrently.
Claims (4)
1. dual-band antenna, the connecting portion that comprises first, second Department of Radiation, substrate and connect above-mentioned first, second Department of Radiation and substrate, it is characterized in that: described first, second Department of Radiation is the described substrate in position wherein in the Different Plane of a side all, and all form certain slit between described first, second Department of Radiation and the described substrate three and form resonance frequency magnetic field, and described first, second Department of Radiation constitutes inverted F shaped antenna with connecting portion respectively.
2. dual-band antenna as claimed in claim 1, it is characterized in that: above-mentioned first, second Department of Radiation works in first, second frequency range respectively, and the length of described first, second Department of Radiation corresponds respectively to the wavelength ratio of a characteristic frequency in above-mentioned first, second frequency range.
3. dual-band antenna as claimed in claim 1 is characterized in that: described dual-band antenna also comprises a feeder line.
4. dual-band antenna as claimed in claim 3, it is characterized in that: described feeder line has internal core wire and screen, wherein a wherein end of above-mentioned internal core wire is electrically connected at the junction of above-mentioned first Department of Radiation and above-mentioned connecting portion, and a wherein end of above-mentioned screen is electrically connected at the junction of aforesaid substrate and above-mentioned connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200554776U CN2909557Y (en) | 2005-03-16 | 2005-03-16 | Double-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200554776U CN2909557Y (en) | 2005-03-16 | 2005-03-16 | Double-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2909557Y true CN2909557Y (en) | 2007-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200554776U Expired - Fee Related CN2909557Y (en) | 2005-03-16 | 2005-03-16 | Double-frequency antenna |
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| Country | Link |
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| CN (1) | CN2909557Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635242A (en) * | 2019-09-30 | 2019-12-31 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
-
2005
- 2005-03-16 CN CNU2005200554776U patent/CN2909557Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635242A (en) * | 2019-09-30 | 2019-12-31 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| US11901625B2 (en) | 2019-09-30 | 2024-02-13 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Antenna apparatus and electronic device |
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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: 20070606 Termination date: 20120316 |