CN101916916B - Dual-band antenna - Google Patents
Dual-band antenna Download PDFInfo
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- CN101916916B CN101916916B CN2010102264190A CN201010226419A CN101916916B CN 101916916 B CN101916916 B CN 101916916B CN 2010102264190 A CN2010102264190 A CN 2010102264190A CN 201010226419 A CN201010226419 A CN 201010226419A CN 101916916 B CN101916916 B CN 101916916B
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- 230000008878 coupling Effects 0.000 claims abstract description 43
- 238000010168 coupling process Methods 0.000 claims abstract description 43
- 238000005859 coupling reaction Methods 0.000 claims abstract description 43
- 230000005611 electricity Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 239000011295 pitch Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention relates to a dual-band antenna, which comprises a spiral coil, a first coupling unit and a second coupling unit. The lower end of the spiral coil is provided with a first resonance coil with first pitch, the upper end of the spiral coil is provided with a second resonance coil which has second pitch and is used for generating resonance with resonance frequency lower than that of the first resonance coil, and the first pitch is greater than the second pitch; the first coupling unit is arranged in the first resonance coil, electrically isolated from the first resonance coil and used for stabilizing the resonance frequency performance of the first resonance coil; and the second coupling unit is arranged outside the spiral coil, electrically isolated from the spiral coil and used for increasing the equivalent electrical length of the first resonance coil and improving the frequency gain of the first resonance coil. The high-frequency part of a partial resonance structure is improved through the two coupling units, so that the first resonance coil has high resonance frequency performance, the performance of the first resonance coil is more concentrated on the upper hemispherical surface, the distributed current of the first resonance coil is increased and the electrical length of the first resonance coil is increased at the same time.
Description
Technical field
The present invention relates to a kind of antenna, more particularly, relate to a kind of dual-band antenna.
Background technology
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 (GSM) and the required frequency range of Digital Cellular System (DCS) as mobile phone, the hyperfrequency of intercom (UHF) and global positioning system frequency (GPS) etc., its corresponding antenna is also double frequency or multifrequency, the dual-band antenna of the prior art dual-band antennas that adopt two a period of time structures or partial resonance structure more.Adopt the dual-band antenna of two a period of time structures that two antennas are merged, be placed under a distributing point, two antennas have resonance separately and are independent of each other.Normally helical structure forms low-frequency resonant, and the whip structure realizes HFS.The length of helical structure is half-wavelength (low-frequency resonant frequency), and the length of whip structure is quarter-wave (high-frequency resonant frequency), and the antenna performance under two frequencies is similar to the performance of half-wave dipole.
The dual-band antenna of partial resonance structure, change the part-structure pitch of spiral the resonance can realize double frequency, and the part that changes pitch is a resonance length of needed another frequency, and the antenna performance under two frequencies is similar to the performance of half-wave dipole.Current external dual-band antenna adopts the structure of partial resonance to realize mostly, adopts helical structure to realize, high-frequency resonant partly is placed on to the bottom of coil, and it and another part form the resonance of lower frequency jointly.Concrete structure can be shown in Figure 1.
Above-mentioned two kinds of external spiral dual-band antennas, be the mode of operation of UHF/VHF (very high frequency(VHF))+GPS frequency range, the pitch of coil sections changed or add the whip antenna of 1/4th to be placed on the bottom of spiral, forms resonance.This design is relatively simple, and every for the GPS frequency range, the performance of antenna more concentrates on second sphere, at needed first sphere of GPS (part pointed into the sky), a very large depression is arranged, and Performance Ratio is poor, is unfavorable for the reception of gps signal.
If at VHF frequency range design dual-band antenna, the gap of two frequencies is huge so, is about 10 frequencys multiplication in addition, a little bias of VHF frequency all can cause the greatest differences of gps signal.
Summary of the invention
The technical problem to be solved in the present invention is, in the upper defect that performance is undesirable, the GPS receptivity is bad of first sphere (direction pointed into the sky), provides a kind of dual-band antenna for dual-band antenna in the above-mentioned prior art of prior art.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of dual-band antenna, comprise helical coil, the lower end of described helical coil is set to have the first resonance coil of first segment distance, produce the first resonance frequency, the upper end of described helical coil is set to have the second section distance and for generation of the second resonance coil than the lower resonance of described the first resonance frequency, described first segment is apart from being greater than described second section distance; Also comprise:
Be arranged in the first resonance coil and with the first resonance coil electricity isolation be used to stablizing the first coupling unit of the first resonance coil resonance frequency performance;
Be arranged at helical coil outer and with the isolation of helical coil electricity for increasing the first resonance coil equivalent electric length and the second coupling unit of improving the first coil resonance frequency gain.
The invention has the beneficial effects as follows, by the HFS in the partial resonance structure, increasing by the first coupling unit, thereby obtain the performance of the first resonance coil resonance frequency preferably, and do not affect the performance of the second resonance coil.Make the performance of the first resonance coil resonance frequency more concentrate on first sphere.Two coupling units that add have increased the distributed current of the first resonance coil, have increased simultaneously the electrical length of the first resonance coil.
The accompanying drawing explanation
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the partial resonance Double-frequency antenna structure schematic diagram that in prior art, high-frequency resonant is placed in to the helical coil bottom;
Fig. 2 is the Double-frequency antenna structure schematic diagram according to one embodiment of the invention;
Fig. 3 is the Double-frequency antenna structure schematic diagram according to another embodiment of the present invention;
Fig. 4 is the GPS frequency band index schematic diagram of dual-band antenna shown in Figure 3;
Fig. 5 is the GPS gain emulation directional diagram of dual-band antenna shown in Figure 3;
Fig. 6 is the VHF frequency band index schematic diagram of dual-band antenna shown in Figure 3;
Fig. 7 is the VHF gain emulation directional diagram of dual-band antenna shown in Figure 3;
Fig. 8 is the VHF frequency range antenna pattern of dual-band antenna sample shown in Figure 3;
Fig. 9 is the GPS frequency range antenna pattern of dual-band antenna sample shown in Figure 3.
Embodiment
Fig. 2 is the Double-frequency antenna structure schematic diagram according to one embodiment of the invention.Dual-band antenna 200 shown in Figure 2, comprise helical coil 201, the first coupling unit 202.The lower end of helical coil 201 is set to have the first resonance coil 201A of first segment distance, the upper end of described helical coil 201 be set to have second section apart from and for generation of the second resonance coil 201B of the resonance lower than described the first resonance coil 201A resonance frequency, wherein first segment is apart from being greater than the second section distance.The first coupling unit 202 be arranged in the first resonance coil and with the first resonance coil electricity isolation be used to stablizing the performance of the first resonance coil resonance frequency.By increasing by the first coupling unit 202, thereby obtain the performance of the first resonance coil resonance frequency preferably, and do not affect the performance of the second resonance coil.Make the performance of the first resonance coil resonance frequency more concentrate on first sphere.Spurious impedance is to concern the key factor that the GPS performance can settle out, and increases the spurious impedance that the first coupling unit 202 can improve the first resonance coil 201A.
Fig. 3 is the Double-frequency antenna structure schematic diagram according to another embodiment of the present invention.With the difference of Fig. 2, be, dual-band antenna shown in Figure 3 also comprise the second coupling unit 203, the second coupling units 203 be arranged at helical coil outer and with the isolation of helical coil electricity for increasing the first resonance coil equivalent electric length and the resonance frequency gain that improves the first resonance coil.The second coupling unit 203 has increased in fact the height of the second resonance coil.Two coupling units in Fig. 2 and Fig. 3 have increased the distributed current of the first resonance coil, have increased simultaneously the electrical length of the first resonance coil.
Fig. 2 and helical coil 201 shown in Figure 3 are complete coils, and upper and lower has different pitches.For the convenience on describing, the coil with first segment distance on top is called to the first resonance coil 201A, the coil with second section distance of bottom is called to the second resonance coil 201B.Generally, Fig. 2 and dual-band antenna shown in Figure 3 are operated in GPS and VHF frequency range, and wherein the first resonance coil 201A is operated in the GPS frequency range, and the second resonance coil 201B is operated in the VHF frequency range.Magnitude relationship about first segment distance and second section distance is fixed by variable-pitch screw coil 201, just passable as long as variable-pitch screw coil 201 can realize that double frequency receives.Generally, the size of first segment distance is more than the twice of second section distance, guarantees the basic property of GPS frequency range.
In an embodiment of the present invention, the length of the first resonance coil 201A is about the half wavelength of the first resonance coil 201A working frequency range (GPS frequency range), and the length of the second resonance coil 201B is about the half wavelength of the second resonance coil 201B working frequency range (VHF frequency range).
Figure 2 shows that the floor map of dual-band antenna 200, the first coupling unit 202 shown in figure is rectangle, being actually its section is rectangle, the cylinder that the first coupling unit 202 is made for metal material, its radius is close to the internal diameter of (being slightly less than) helical coil, and the height of the first coupling unit 202 is about 1/8th wavelength of the first resonance coil working frequency range.The second coupling unit 203 in Fig. 3 is wire, and length is less than or equal to the half wavelength (9.5mm) of the first resonance coil working frequency range (GPS frequency range).
In an embodiment of the present invention, the Rotary-table of the handstand that the first coupling unit 202 is made for metal material, bottom is upper, and near the second resonance coil 201B, the radius of bottom is close to the internal diameter of helical coil.This scheme can be used as implements preferred version of the present invention.In another embodiment of the present invention, the cone that the first coupling unit 202 is made for metal material.
In an embodiment of the present invention, the second coupling unit 203 is wire, and an end, for around the first resonance coil 201A and annulus with fixation, can be for example the annulus (also namely this annulus is nonocclusive) with opening.The annulus end of the second coupling unit 203 is arranged on the outside of the first resonance coil 201A, and the other end extends to certain part of the second resonance coil 201B.
Annulus with opening can be arranged at the position at the close two ends of the first resonance coil 201A, can realize in this case the voltage coupling, makes the voltage maximum.The length of the second coupling unit 203 is less than or equal to the half wavelength of GPS frequency range.
In further embodiment of this invention, an end of the second coupling unit 203 is to be arranged at described the first resonance coil middle part and, around the closed circle of described the first resonance coil, can to realize in this case the maximum current coupling.
In Fig. 2 and Fig. 3, the first coupling unit 202 and the second coupling unit 203 and the isolation of helical coil electricity, that is to say with helical coil and do not electrically contact.
Dual-band antenna 200 makes the GPS performance more concentrate on first sphere.The first coupling unit 202 adopted makes the stable performance of GPS resonance coil.The second coupling unit 203 can increase the equivalent electric length of GPS, promotes the gain of GPS resonance frequency.
Dual-band antenna 200 of the present invention can be applicable on professional intercom or other electronic equipment.Distributing point by electronic equipment is electrically connected to electronic equipment, thereby the signal received can be sent to electronic equipment.
In order more clearly to explain the performance of the dual-band antenna that the present invention provides, below introduce the simulation result of dual-band antenna 200.
Fig. 4 is the GP S frequency band index schematic diagram of dual-band antenna shown in Figure 3, and Fig. 5 is the GPS gain emulation directional diagram of dual-band antenna shown in Figure 3.As can be known by Fig. 4-5, the better performances of GPS frequency range, the performance of antenna has half to concentrate on first sphere, the about 0dBi of antenna gain left and right, and higher maximum gain angle (peak gain angle is arranged, be called for short PGA) (gain data of this emulation, for not adding antenna overcoat and host housing, is disregarded the ideal value of PCB loss).In Fig. 5, m3, m4, m5, m6 position show PGA, and m7 has indicated the position of the gain minimum value of two lobes.
Fig. 6 is the VHF frequency band index schematic diagram of dual-band antenna shown in Figure 3; Fig. 7 is the VHF gain emulation directional diagram of dual-band antenna shown in Figure 3.As can be known by Fig. 6-7, dual-band antenna of the present invention, when improving the GPS performance, does not affect the performance of VHF.
In order to verify dual-band antenna performance provided by the invention, use network analyzer and microwave dark room to test the dual-band antenna sample of foundation the present invention design.Fig. 8 is the VHF frequency range antenna pattern of dual-band antenna shown in Figure 3; Fig. 9 is the GPS frequency range antenna pattern of dual-band antenna shown in Figure 3.
From Fig. 8-9, can find out, the gain index of antenna is fine, and the gain of VHF frequency range (being illustrated as 160MHz) has-the 5dBi left and right, and the gain of GPS frequency range (being illustrated as 1575MHz) is about the 0dBi left and right, GPS gain pattern and emulation basically identical arranged near symmetrical directional diagram parameter.Therefore, apply dual-band antenna of the present invention, GPS performance preferably can be arranged, and do not affect the performance of VHF.At professional intercom, use, GPS can have good reception.
The foregoing is only the preferred embodiments of the present invention, not in order to limit the present invention, all any modifications of doing in the spirit and principles in the present invention, be equal to and replace or improvement etc., all should be included in protection scope of the present invention.
Claims (10)
1. dual-band antenna, comprise helical coil, the lower end of described helical coil is set to have the first resonance coil of first segment distance, the upper end of described helical coil be set to have second section apart from and for generation of the second resonance coil of the resonance lower than described the first resonance coil resonance frequency, described first segment is apart from being greater than described second section distance; It is characterized in that, also comprise:
Be arranged in the first resonance coil and with the first coupling unit of the first resonance coil electricity isolation, described the first coupling unit is for stablizing the first resonance coil resonance frequency performance.
2. dual-band antenna according to claim 1, it is characterized in that, also comprise be arranged at helical coil outer and with the second coupling unit of helical coil electricity isolation, described the second coupling unit is for increasing the first resonance coil equivalent electric length and improve the first coil resonance frequency gain.
3. dual-band antenna according to claim 1, is characterized in that, the length of described the first resonance coil is about the half wavelength of the first resonance coil working frequency range, and the length of described the second resonance coil is about the half wavelength of the second resonance coil working frequency range.
4. dual-band antenna according to claim 1, is characterized in that, described the first coupling unit is the cylinder made of metal material or the round platform of handstand.
5. dual-band antenna according to claim 4, is characterized in that, the height of described the first coupling unit is about 1/8th wavelength of the first resonance coil working frequency range.
6. dual-band antenna according to claim 2, is characterized in that, described the second coupling unit is wire, and length is less than or equal to the half wavelength of the first resonance coil working frequency range.
7. dual-band antenna according to claim 6, is characterized in that, an end of described the second coupling unit is for around described the first resonance coil and annulus with fixation.
8. dual-band antenna according to claim 6, is characterized in that, an end of described the second coupling unit is to be arranged at described the first resonance coil middle part and around the closed circle of described the first resonance coil.
9. dual-band antenna according to claim 2, is characterized in that, the diameter of described the first coupling unit is slightly less than the internal diameter of the first resonance coil.
10. dual-band antenna according to claim 2, is characterized in that, the first resonance coil of described helical coil is operated in the GPS frequency range, and the second resonance coil of described helical coil is operated in the VHF frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102264190A CN101916916B (en) | 2010-07-14 | 2010-07-14 | Dual-band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102264190A CN101916916B (en) | 2010-07-14 | 2010-07-14 | Dual-band antenna |
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| Publication Number | Publication Date |
|---|---|
| CN101916916A CN101916916A (en) | 2010-12-15 |
| CN101916916B true CN101916916B (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102264190A Active CN101916916B (en) | 2010-07-14 | 2010-07-14 | Dual-band antenna |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2488927C1 (en) * | 2012-03-16 | 2013-07-27 | Научно-Производственное Общество С Ограниченной Ответственностью "Кв-Связь" | Tunable resonant antenna with matching device |
| CN106935977A (en) * | 2015-12-29 | 2017-07-07 | 海能达通信股份有限公司 | A kind of multiband aerial and communication device |
| US10910725B2 (en) * | 2016-05-16 | 2021-02-02 | Motorola Solutions, Inc. | Dual contra-wound helical antenna for a communication device |
| CN111653867A (en) * | 2020-04-24 | 2020-09-11 | 海能达通信股份有限公司 | Antenna, manufacturing method thereof and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275824A (en) * | 1999-05-27 | 2000-12-06 | 摩托罗拉公司 | Spiral antenna |
| CN1319266A (en) * | 1999-08-03 | 2001-10-24 | 皇家菲利浦电子有限公司 | Dual antenna and radio device provided therewith |
| CN1630961A (en) * | 2002-06-25 | 2005-06-22 | 株式会社Emw天线 | Multiband antenna and its producing method |
| CN101764281A (en) * | 2009-07-31 | 2010-06-30 | 深圳市好易通科技有限公司 | Dual-frequency antenna |
| CN201749953U (en) * | 2010-07-14 | 2011-02-16 | 海能达通信股份有限公司 | Double-frequency antenna |
-
2010
- 2010-07-14 CN CN2010102264190A patent/CN101916916B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275824A (en) * | 1999-05-27 | 2000-12-06 | 摩托罗拉公司 | Spiral antenna |
| CN1319266A (en) * | 1999-08-03 | 2001-10-24 | 皇家菲利浦电子有限公司 | Dual antenna and radio device provided therewith |
| CN1630961A (en) * | 2002-06-25 | 2005-06-22 | 株式会社Emw天线 | Multiband antenna and its producing method |
| CN101764281A (en) * | 2009-07-31 | 2010-06-30 | 深圳市好易通科技有限公司 | Dual-frequency antenna |
| CN201749953U (en) * | 2010-07-14 | 2011-02-16 | 海能达通信股份有限公司 | Double-frequency antenna |
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| CN101916916A (en) | 2010-12-15 |
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