CN1411098A - Built in mobile telephone bifrequency paster antenna having high harmonic wave inhibition - Google Patents
Built in mobile telephone bifrequency paster antenna having high harmonic wave inhibition Download PDFInfo
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- CN1411098A CN1411098A CN 02145452 CN02145452A CN1411098A CN 1411098 A CN1411098 A CN 1411098A CN 02145452 CN02145452 CN 02145452 CN 02145452 A CN02145452 A CN 02145452A CN 1411098 A CN1411098 A CN 1411098A
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Abstract
This invention relates to a built-in double frequency plate antenna of a mobile phone with high harmonic suppression characterizing in applying second harmonic property to realize double frequencies of 900 MHz and 1800 MHz of a single antenna in which the medium layer is band-gap structure material lining-up periodically, photon crystal unit gap is one half wavelength or one fourth, one eighth, three-fourth, the hole diameter is half of the photon crystal unit gap, antenna plate can be thin steel plate of 20x25x0.10 with the advantages of tightened function, and one set not needing welding or drilling holes.
Description
Technical field
The present invention relates to the built-in double frequency antenna with higher harmonics inhibition that a kind of mobile phone is used, suitable frequency range is 880～960 megahertzes and 1710～1880 megahertzes.The invention belongs to the dual-band mobile phone micro-strip paster antenna
Technical field.
Background technology
Development of wireless communication devices is very swift and violent, cell phone, global positioning system (GPS), synthetic aperture radar (SAR), satellite communication, personal communication (900 megahertzes simulation net/1800 megahertz digital networks) wait the field, all need light weight, simple in structure, make simply, be easy to integrated broadband or two-band/dual-polarized antenna.
Micro-strip paster antenna becomes the leading role of printed antenna class with characteristics such as its feeding classification and the polarization variation of standard and feeding network, active circuit are integrated, the intrinsic narrow-band of simple paster antenna is because lamination in recent years pastes, the development of the wide band technology of U type groove paster has not existed.According to the requirement of modern communications, an important directions of printed antenna development is multi-functional, multiband, multipolarization and multipurpose.The preliminary target of dual-band antenna is the dual-band mobile phone that is applied to 900 megahertzes/1800 megahertzes, and the mobile portable antennas that satellite communication is up, band downlink is shared, receiving terminal etc.When two operating frequencies away from the time, can avoid using the antenna of two separation with the double frequency structure, thus but the structure of simplified system.
Along with the raising of science and technology development and technological level, Dual-frequency Patch Antennas has caused more and more keen interest of people.Except that the advantage on weight, space and expense, Dual-frequency Patch Antennas can guarantee separation and the coupling receiving/post a letter.It structurally has various ways, can reduce on the principle: orthogonal mode double frequency-dual-polarized patch antenna (single layer structure), many pasters dual-band antenna and reactance load Dual-frequency Patch Antennas and little array dual-band antenna.Feed method has single feedback and double-fed two classes, and feed structure is also very flexible, and coaxial probe feed, feed microstrip line, coupling feed etc. are arranged.Report about the Two bors d's oeuveres paster antenna is a lot, Fa-Shian Chang and Kin-Lu Wong has introduced the antenna of their design in article " Broadband dual-frequencycoplanar probe-fed patch antenna for GSM/DCS/PCS base stations (Microwaveand Optical Technology Letters; vol.33; No.5, June 5 2002) ".This antenna is to be a kind of Two bors d's oeuveres paster antenna of substrate with the air dielectric, and suitable frequency range is 880～960 megahertzes and 1710～1880 megahertzes.But its patch size is bigger: long 74 millimeters of radiation patch, wide is 65 millimeters.At the trend of present antenna for mobile phone compact in size, obvious this antenna can't satisfy market demands.And for example people such as Fu-Ren Hsiao and Hong-Twu Chen " antenna of design is that 4.4 dielectric layer is made substrate with dielectric constant among the A dual-bandplanar inverted-F patch antenna with a branch-line slit (Microwave and OpticalTechnology Letters; vol.32; No.4; Feb.20 2002), adopts the coaxial feed mode at document.Antenna size and suitable frequency range can both satisfy the scope of application of present antenna for mobile phone.But because the existence of harmonic wave makes that antenna performance is not fine.
Summary of the invention
The present invention has introduced the notion of photonic crystal in order to eliminate the clutter that antenna may occur, and has designed to have the mobile phone double frequency built-in antenna that higher harmonics suppresses.Photonic crystal is a kind of new material with periodic arrangement that was incorporated into field of microwave antennas in recent years.The high impedance surface characteristic of photonic crystal can suppress surperficial wave propagation, be in electromagnetic wave in the bandgap range for frequency, the band gap surface is a desirable mirror surface, do the base material of small-sized plane microstrip antenna with it, originally enter substrate and the electric flux of loss will be all by photonic crystal reflected back space, thereby improved the radiation efficiency of antenna greatly.Along with the fast development of person-to-person communication, the built-in antenna that is applied to mobile phone has become domestic and international antenna researcher's a research focus.Reported the antenna that is used for the double frequency collection owing to the manufacture craft more complicated, cost is higher.In addition, because dielectric layer of the present invention adopts the photonic crystal that occurred in recent years, utilize the high-impedance behavior of photonic crystal in the radiation efficiency that improves antenna, to keep bigger bandwidth.
The type that at present domestic and international mobile phone market relates to antenna is a lot, and each big communication common carrier all has own development product.But because the manufacture craft more complicated of these antenna, cost is higher.It is simple, functional that the object of the invention is to invent a kind of manufacture craft, the novel mobile phone antenna with dual frequency characteristics.
The present invention is characterised in that the two waveband characteristic that adopts second harmonic generation properties to realize antenna.Stamping technology is adopted in the making of antenna patch, makes simply, and cost is lower.The dielectric layer of antenna adopts photoetching and micromachining technology to form and presses the bandgap structure material that some cycles is arranged, and it can suppress harmonic wave and disturbing wave well, has improved the receiving sensitivity of antenna greatly.The design of photonic crystal is a lot, can design the photonic crystal of different-waveband as required.The unit interval of photonic crystal is generally half wavelength, and the size in aperture is generally got half of unit interval.Consider the demand of different-waveband and the development trend of microwave device miniaturization, also can get unit interval and reach 1/4th even 1/8th wavelength more for a short time; It is bigger that cell size can be got, even can get four/three-wavelength of spacing.
Antenna structure block diagram accompanying drawing 1 of the present invention.The antenna patch size is wide 20 millimeters, long 25 millimeters, paster thickness is 0.10 millimeter, paster material is a sheet copper.Consider design feature of the present invention,, will face the problem of possibility mismatch if adopt microstrip-fed mode.For avoiding occurring influencing the mismatch problems appearance of antenna performance, the present invention adopts probe mode feed.The antenna patch gross weight is less than 1 gram.The antenna patch top layer is coated with the deielectric-coating of one deck 0.03-0.08 millimeter as protection.The present invention can be embedded on other circuit board easily.
Designed the Dual-frequency Patch Antennas about 900 megahertzes and two frequencies of 1800 megahertzes.Be center frequency points with 900 megahertz frequencies in the design process, make 1800 megahertz frequency places second harmonic occur by regulating antenna size, thereby realize the double frequency function of single antenna.Adopt the probe feed mode that antenna model has been carried out optimal design, and obtain measured result, see shown in the accompanying drawing 2.
Obviously, major advantage of the present invention is embodied in the following aspects:
1, size is little, compact conformation;
2, the function that has the double frequency radiation;
3, integral type, need not weld or hole;
4, with diaphragm;
5, processing technology is simple, and cost is low, is applicable to production in enormous quantities.
Description of drawings
Fig. 1 is the structural representation of the built-in mobile phone Dual-frequency Patch Antennas of higher harmonics inhibition provided by the invention:
(1) by getting through the photonic crystal on the dielectric layer that the hole obtains;
(2) dielectric layer;
(3) antenna patch can be by additional one deck dielectric layer (not shown) that plays a protective role on paster.
Fig. 2 is the antenna scattering parameter curve:
Abscissa is represented frequency (GHz), and ordinate is electromagnetic scattering parameter (dB), and two of double frequency provided by the invention frequencies are respectively 900 megahertzes and 1800 megahertzes as can be seen.
Embodiment
As shown in Figure 1, antenna patch 3 is of a size of wide 20 millimeters, and long 25 millimeters, 0.10 millimeter of thickness.Dielectric layer 2 adopts polytetrafluoroethylmaterial material, and paster material adopts sheet copper.The antenna patch surface is coated with the PTFE medium film of 0.05 millimeter of one deck as protection, and each unit interval of photon crystal 1 is a half wavelength, and aperture size is 1/2nd of a unit interval.Because arranging, photonic crystal presents English alphabet " F " type, so " having the built-in mobile phone Dual-frequency Patch Antennas that higher harmonics suppresses " provided by the invention is referred to as " the built-in mobile phone Dual-frequency Patch Antennas of F type " again.
Claims (5)
1, a kind of built-in mobile phone Dual-frequency Patch Antennas with higher harmonics inhibition, antenna patch and dielectric layer are bonded together, and it is characterized in that:
(1) adopting the double frequency frequency of the single antenna of second harmonic generation properties is 900 megahertzes and 1800 megahertzes;
(2) dielectric layer is the bandgap structure material by periodic arrangement, and the unit interval of photonic crystal is a half wavelength, aperture size be photonic crystal unit interval 1/2nd.
2, by the described built-in mobile phone Dual-frequency Patch Antennas with higher harmonics inhibition of claim 1, it is characterized in that described antenna patch is wide 20 millimeters, long 25 millimeters, thickness is 0.10 millimeter scale copper.
3, by the described built-in mobile phone Dual-frequency Patch Antennas of claim 2, it is characterized in that described antenna patch top layer is coated with the deielectric-coating of one deck 0.03-0.08 millimeter with higher harmonics inhibition.
4, by the described built-in mobile phone Dual-frequency Patch Antennas with higher harmonics inhibition of claim 1, the unit interval that it is characterized in that the photonic crystal of described dielectric layer is a quarter-wave, or 1/8th wavelength, or four/three-wavelength.
5, by the described built-in mobile phone Dual-frequency Patch Antennas of claim 1, it is characterized in that adopting the probe feed mode that antenna model is optimized design with higher harmonics inhibition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145452 CN1223047C (en) | 2002-11-15 | 2002-11-15 | Built in mobile telephone bifrequency paster antenna having high harmonic wave inhibition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145452 CN1223047C (en) | 2002-11-15 | 2002-11-15 | Built in mobile telephone bifrequency paster antenna having high harmonic wave inhibition |
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| Publication Number | Publication Date |
|---|---|
| CN1411098A true CN1411098A (en) | 2003-04-16 |
| CN1223047C CN1223047C (en) | 2005-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02145452 Expired - Fee Related CN1223047C (en) | 2002-11-15 | 2002-11-15 | Built in mobile telephone bifrequency paster antenna having high harmonic wave inhibition |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358182C (en) * | 2003-07-07 | 2007-12-26 | 明基电通股份有限公司 | Dual-frequency antenna |
| CN1941504B (en) * | 2005-09-30 | 2011-05-18 | 西北工业大学 | Micro-band antenna of C-band negative-permeability material |
| CN101212496B (en) * | 2006-12-29 | 2011-07-13 | 西北工业大学 | Metamaterial microstrip line based radiation-proof mobile phone enclosure |
| CN102394514A (en) * | 2011-08-15 | 2012-03-28 | 浙江大学 | High efficient microwave energy receiving board formed by secondary wavelength resonance structural units |
| CN101557037B (en) * | 2008-04-09 | 2013-05-08 | 广达电脑股份有限公司 | Dual-feed-in dual-frequency antenna |
-
2002
- 2002-11-15 CN CN 02145452 patent/CN1223047C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358182C (en) * | 2003-07-07 | 2007-12-26 | 明基电通股份有限公司 | Dual-frequency antenna |
| CN1941504B (en) * | 2005-09-30 | 2011-05-18 | 西北工业大学 | Micro-band antenna of C-band negative-permeability material |
| CN101212496B (en) * | 2006-12-29 | 2011-07-13 | 西北工业大学 | Metamaterial microstrip line based radiation-proof mobile phone enclosure |
| CN101557037B (en) * | 2008-04-09 | 2013-05-08 | 广达电脑股份有限公司 | Dual-feed-in dual-frequency antenna |
| CN102394514A (en) * | 2011-08-15 | 2012-03-28 | 浙江大学 | High efficient microwave energy receiving board formed by secondary wavelength resonance structural units |
| CN102394514B (en) * | 2011-08-15 | 2014-04-16 | 浙江大学 | Microwave energy receiving board formed by secondary wavelength resonance structural units |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1223047C (en) | 2005-10-12 |
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Granted publication date: 20051012 Termination date: 20111115 |