CN201829614U - Whip dual-frequency antenna - Google Patents
Whip dual-frequency antenna Download PDFInfo
- Publication number
- CN201829614U CN201829614U CN 201020148437 CN201020148437U CN201829614U CN 201829614 U CN201829614 U CN 201829614U CN 201020148437 CN201020148437 CN 201020148437 CN 201020148437 U CN201020148437 U CN 201020148437U CN 201829614 U CN201829614 U CN 201829614U
- Authority
- CN
- China
- Prior art keywords
- radiant body
- dual
- resonance
- radiation body
- antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The utility model relates to a whip dual-frequency antenna, which comprises a radiation body, wherein the radiation body is connected with a host machine through a feeding point of the host machine and comprises a first radiation body and a second radiation body, the first radiation body is used for generating first resonance and is in a linear shape, the top of the first radiation body is provided with the second radiation body in a spiral structure in a reverse string way, the second radiation body generates second resonance with the resonance frequency higher than that of the first radiation body. Through the ingenious addition of the second radiation body with the resonance frequency higher than that of the first radiation body on the top of the first radiation body, the length of a second resonance frequency model is increased, in addition, the influence caused by the ultra high frequency (UHF) band change is reduced, the antenna performance of the dual-frequency antenna on the general purpose radar (GPS) frequency band is more perfectly integrated on the upper half spherical surface, better GPS gain performance is realized, and in addition, the UHF effect is not influenced.
Description
Technical field
The utility model relates to a kind of antenna, more particularly, relates to a kind of whiplike dual-band antenna.
Background technology
In current informationized society, people wish to receive Useful Information whenever and wherever possible easily usually, so various portable radio communication devices are widely used in the daily life.In wireless communication apparatus, be used for launching the reception radio wave to transmit the antenna of radio signal, be undoubtedly one of crucial element.For a large amount of hand-held terminal devices, antenna is not only compact, preferably also wants to operate in double frequency, and frequency band is also wideer.
At present, hand-held terminal device has a plurality of frequency ranges usually to realize a plurality of functions or miscellaneous function, global system for mobile communications (Global System for Mobile Communications as mobile phone, GSM) and the required frequency range of Digital Cellular System DCS (GSM+DCS), hyperfrequency of intercom (UHF) and global positioning system frequency (Global Positioning System, GPS) etc., Dui Ying its antenna also is double frequency or multifrequency.
The dual-band antenna of the prior art dual-band antennas that adopt two oscillator structures are used in the design of antenna for mobile phone more more, and mentality of designing is to draw two different length radiating doublets at feedback point place, produces the resonance of different frequency respectively.
Prior art also adopts the dual-band antenna of partial resonance structure usually, the partial resonance structure generally is that higher frequency range is designed with different structural parameters, as shown in Figure 1, the entire antenna oscillator produces a kind of frequency, high-frequency resonant then is to produce with the different that part of spiral of parameter, as early stage antenna for mobile phone, generally be that the bottom that the DCS frequency range is placed on coil is handled.
Present external dual-band antenna adopts the structure of partial resonance to realize mostly, adopts helical structure to realize it, i.e. bipatch helical antenna partly is placed on the bottom of coil with high-frequency resonant, and it and another part constitute the resonance of lower frequency jointly.But, be directed to the external dual-band antenna of intercom, it is the mode of operation of UHF+GPS frequency range, in the prior art GPS resonance portion is placed on the bottom of spiral, form resonance, referring to shown in Figure 2, this design is for the GPS frequency range, the performance of antenna more concentrates on second sphere, at needed first sphere of GPS (part that points into the sky), performance is poor, and is not suitable for the GPS performance of specialty and the functional localization of professional terminal equipment, and this design is for uhf band, and its bandwidth is subjected to the influence of GPS frequency range and is narrow.
The existing external dual-band antenna of UHF+GPS is for solving the performance of antenna GPS frequency range, the GPS resonance portion is positioned over the top of aerial coil, as shown in Figure 3, make it to form the GPS receptivity of upwards concentrating, when the frequency of UHF is about the special integral multiple of GPS, the performance of GPS can reach the relatively poor state that compares, and this is to be determined by special frequency range relation, can't avoid.For this antenna, UHF is in the local oscillator pattern, and promptly the total length of coil is about about half of resonance wavelength, and the length of top GPS also is about a half-wavelength, and therefore, the influence that the performance of GPS is subjected to uhf band is very big.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, a kind of whiplike dual-band antenna is provided, make the antenna performance of dual-band antenna when the GPS frequency range better concentrate on first sphere, realize better GPS performance, and do not influence the UHF performance.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of whiplike dual-band antenna, comprise the radiant body that the distributing point by main frame is connected with main frame, wherein, described radiant body comprises first radiant body of the linearity that is used to produce first resonance, plays a reversed role and be provided with second radiant body of the helical structure that is used to produce second resonance higher than the described first radiant body resonance frequency in the top of described first radiant body.
Whiplike dual-band antenna described in the utility model, wherein, the total length of described second radiant body is this second radiant body, second resonance wavelength
Whiplike dual-band antenna described in the utility model, wherein, the top electric current of described second radiant body and described first radiant body in the same way, the active length of described second radiant body is that two half-wave dipoles are superimposed.
Whiplike dual-band antenna described in the utility model, wherein, the total length of described first radiant body is first resonance wavelength
Whiplike dual-band antenna described in the utility model, wherein, described first radiant body adopts whip antenna.
Whiplike dual-band antenna described in the utility model, wherein, described second radiant body adopts the GPS resonance coil.
Implement whiplike dual-band antenna of the present utility model, has following beneficial effect: by add the second higher radiant body of resonance frequency at the first radiant body top, the second resonance frequency model length is improved, make the influence that is subjected to the uhf band variation to diminish, make the antenna performance of dual-band antenna when the GPS frequency range better concentrate on first sphere, realize better GPS gain performance, and do not influence the effect of UHF.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the employing partial resonance structure Double-frequency antenna structure schematic diagram of prior art;
Fig. 2 is the external Double-frequency antenna structure schematic diagram of the bottom that the GPS resonance portion is placed on spiral of prior art;
Fig. 3 is the external Double-frequency antenna structure schematic diagram at the top that the GPS resonance portion is placed on spiral of prior art;
Fig. 4 is the bipatch helical antenna GPS band gain directional diagram of prior art;
Fig. 5 is a whiplike Double-frequency antenna structure schematic diagram of the present utility model;
Fig. 6 is the frequency band index of whiplike dual-band antenna uhf band simulation result of the present utility model;
Fig. 7 is the UHF directional diagram index of whiplike dual-band antenna uhf band simulation result of the present utility model;
Fig. 8 is the frequency band parameter of whiplike dual-band antenna uhf band simulation result of the present utility model;
Fig. 9 is the directional diagram parameter of whiplike dual-band antenna uhf band simulation result of the present utility model;
Figure 10 is the frequency band parameter of the utility model whiplike dual-band antenna sample test of debugging;
Figure 11 is a loading whip antenna gain pattern one of the present utility model;
Figure 12 is a loading whip antenna gain pattern two of the present utility model.
Embodiment
Below in conjunction with diagram, preferred embodiment of the present utility model is described in detail.
The whiplike Double-frequency antenna structure of the utility model preferred embodiment as shown in Figure 5, it comprises the radiant body that the distributing point by main frame is connected with main frame.Wherein radiant body comprises two parts, and a part is first radiant body 11 that is used to produce the linearity of first resonance, for example adopts whip antenna; Second portion is to play a reversed role to be arranged on second radiant body 12 at first radiant body, 11 tops, is used to produce the helical structure of second resonance higher than first radiant body, 11 resonance frequencys, for example adopts the GPS resonance coil.First resonance mainly takes place at uhf band (300-800MHz) in first radiant body 11, the length of second radiant body 12 is the resonance length of whiplike dual-band antenna at the GPS working frequency range, first radiant body 11 and second radiant body 12 are by coupling, can carry out the pitch of regulating winding, come the GPS resonance on the tuning different uhf band.
By second radiant body 12 is played a reversed role in the top of first radiant body 11, make second radiant body 12 and first radiant body 11 the top electric current in the same way, the real work length that makes second radiant body 12 is that two half-wave dipoles are superimposed, the actual raising of the second resonance frequency model length with second radiant body 12, thereby its influence that is subjected to the uhf band variation is diminished, make antenna directivity preferably be arranged at first sphere, and the situation when being better than the work of half-wave dipole.
Preferably, the total length of second radiant body 12 is this second radiant body resonance wavelength
The total length of first radiant body 11 is first resonance wavelength
Uhf band and GPS frequency range are independent of each other, can make whiplike dual-band antenna that better directivity is arranged like this, the whole frequency ranges (300-800MHz) that are implemented in UHF realize that double frequency is tuning, work in more frequency range to realize whiplike dual-band antenna.
The frequency band index that whiplike dual-band antenna of the present utility model loads whiplike UHF simulation result as shown in Figure 6, the UHF directional diagram index of the simulation result of loading whip antenna UHF as shown in Figure 7, for the purpose of clear, simulation software only is provided with the demonstration antenna structure, and host machine part is set to hide, emulation index among Fig. 6 and Fig. 7 is disregarded the ideal value of PCB loss for not adding antenna overcoat and host housing.
In the present embodiment, with UHF (470-520MHz)+GPS is simulation model, the frequency band parameter of the emulated data of the uhf band of whiplike dual-band antenna as shown in Figure 8, the directional diagram parameter of uhf band simulation result as shown in Figure 9, simulated gain data among Fig. 8 and Fig. 9 are disregarded the ideal value of PCB loss for not adding antenna overcoat and host housing.
From Fig. 8 and Fig. 9 as can be seen, second radiant body (GPS resonance coil) that has added the top at first radiant body (whip antenna) afterwards, the gain pattern of GPS is more satisfactory, compare with the GPS frequency range directional diagram of the bipatch helical antenna shown in Fig. 4, the direction of more energy towards sky arranged, the situation that does not have the depression in the center shown in Fig. 4, gain direction to weaken occurs, the antenna performance of dual-band antenna when the GPS frequency range better concentrates on first sphere, is better than the bipatch helical antenna.And in conjunction with uhf band policy result among the directional diagram of GPS frequency range and Fig. 6 and Fig. 7 as can be seen, the performance of uhf band is influenced hardly, and whole frequency ranges (300-800MHz) that can better be implemented in UHF realize that double frequency is tuning.
The whiplike dual-band antenna sample of making according to above designing institute is through the test of microwave dark room, and the stimulation frequency scope is 300MHZ-2000MHZ, draws the frequency band parameter as shown in figure 10, gain direction such as Figure 11 and shown in Figure 12. Label 1,2,3 is represented first resonance, second resonance and the 3rd resonance respectively among Figure 10, wherein as can be seen the 3rd resonance of whiplike dual-band antenna not at 1575MHz, but being higher than 1575MHz, the GPS resonance coil of available traitorous distance is adjusted, but does not influence the antenna GPS gain pattern.
Whiplike dual-band antenna of the present utility model is by adding the second higher radiant body of resonance frequency again at the first radiant body top, with the actual raising of the second resonance frequency model length, make the influence that is subjected to the uhf band variation to diminish, make the antenna performance of dual-band antenna when the GPS frequency range better concentrate on first sphere, realize better GPS gain performance, and do not influence the effect of uhf band.
The above only is a preferred embodiment of the present utility model, not in order to restriction the utility model, all any modifications of being done in spirit of the present utility model and principle, is equal to and replaces or improvement etc., all should be included in the protection range of the present utility model.
Claims (6)
1. whiplike dual-band antenna, comprise the radiant body that the distributing point by main frame is connected with main frame, it is characterized in that, described radiant body comprises first radiant body of the linearity that is used to produce first resonance, play a reversed role and be provided with second radiant body of helical structure in the top of described first radiant body, described second radiant body produces than the second higher resonance of the described first radiant body resonance frequency.
2. whiplike dual-band antenna according to claim 1 is characterized in that, the total length of described second radiant body is this second resonance frequency wavelength
3. whiplike dual-band antenna according to claim 1 is characterized in that, the top electric current of described second radiant body and described first radiant body in the same way, the working model of described second radiant body is that two half-wave dipoles are superimposed.
4. whiplike dual-band antenna according to claim 1 is characterized in that, the length of described first radiant body is the first resonance frequency wavelength
5. whiplike dual-band antenna according to claim 1 is characterized in that, described first radiant body adopts whip antenna.
6. whiplike dual-band antenna according to claim 1 is characterized in that, described second radiant body adopts the GPS resonance coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020148437 CN201829614U (en) | 2010-03-24 | 2010-03-24 | Whip dual-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020148437 CN201829614U (en) | 2010-03-24 | 2010-03-24 | Whip dual-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201829614U true CN201829614U (en) | 2011-05-11 |
Family
ID=43968132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020148437 Expired - Lifetime CN201829614U (en) | 2010-03-24 | 2010-03-24 | Whip dual-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201829614U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159274A1 (en) * | 2012-04-23 | 2013-10-31 | 海能达通信股份有限公司 | Double-frequency antenna |
| CN108550983A (en) * | 2018-06-08 | 2018-09-18 | 北京乾德永达科技有限公司 | A kind of three frequency range antenna structure of high-isolation ultrashort wave |
-
2010
- 2010-03-24 CN CN 201020148437 patent/CN201829614U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159274A1 (en) * | 2012-04-23 | 2013-10-31 | 海能达通信股份有限公司 | Double-frequency antenna |
| CN108550983A (en) * | 2018-06-08 | 2018-09-18 | 北京乾德永达科技有限公司 | A kind of three frequency range antenna structure of high-isolation ultrashort wave |
| CN108550983B (en) * | 2018-06-08 | 2024-04-26 | 北京乾德永达科技有限公司 | High-isolation ultrashort wave three-frequency-band integrated antenna structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sharawi | Printed MIMO antenna engineering | |
| Wang et al. | Decoupled dual-antenna system using crossed neutralization lines for LTE/WWAN smartphone applications | |
| Deng et al. | TCM-based bezel antenna design with small ground clearance for mobile terminals | |
| CN201845871U (en) | Two-unit-broadband MIMO (multiple input multiple output) antenna array | |
| CN202444054U (en) | Antenna and mobile terminal | |
| CN103296388B (en) | A kind of small ultra-wideband omnidirectional antenna | |
| CN202616411U (en) | Mobile terminal | |
| CN106159461A (en) | Antenna array system and control method | |
| CN102014180A (en) | Built-in FM antenna realization method and mobile phone using same | |
| CN101916912A (en) | Dual-frequency electrified dipole antenna | |
| US8816935B2 (en) | Dual frequency antenna with wide frequency | |
| CN201789063U (en) | Multi-band built-in antenna | |
| Liu et al. | Novel miniature monopole tag antenna for UHF RFID applications | |
| CN201829614U (en) | Whip dual-frequency antenna | |
| CN203367465U (en) | Novel ultra-wideband LTE antenna having metal frame | |
| CN101916916B (en) | Dual-band antenna | |
| CN202333125U (en) | Built-in antenna structure capable of reducing SAR (specific absorption rate) value of mobile terminal effectively | |
| Lai et al. | Compact loop antenna for near-field and far-field UHF RFID applications | |
| CN203760679U (en) | MIMO antenna structure suitable for multi-mode multi-band mobile phone terminal | |
| CN201732864U (en) | Double frequency charged small antenna | |
| CN201853809U (en) | Ringlike multiband aerial and wireless communication device thereof | |
| CN101764281B (en) | Dual-frequency antenna | |
| Ghnimi et al. | Study of a New Design of the Planar Inverted-F Antenna for Mobile Phone Handset Applications | |
| CN103811867A (en) | Antenna and terminal | |
| CN207559035U (en) | Dual-band and dual-feed point high-gain aerial and mimo antenna module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |