CN1838481A - Plane helical microstrip antenna for 3G system mobile terminal - Google Patents
Plane helical microstrip antenna for 3G system mobile terminal Download PDFInfo
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- CN1838481A CN1838481A CN 200610071371 CN200610071371A CN1838481A CN 1838481 A CN1838481 A CN 1838481A CN 200610071371 CN200610071371 CN 200610071371 CN 200610071371 A CN200610071371 A CN 200610071371A CN 1838481 A CN1838481 A CN 1838481A
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Abstract
This invention relates to a plane helical microstrip aerials in 3G system mobile terminal, the character of which is that the dimension is small, strip width is up to 250MHz, which can cover all the transmitting-receiving frequency band plane helical microstrip aerials in 3G system mobile terminal. And the mircrostrip aerials al has the double faced medium base board, one face is the spiral medium base board, the other face is the photon with interval medium base board, the base board is 4.9-5.1cm*4.9-5.1cm; on the spiral medium base board there arranges two arms, two borders of the arm are composed of spirals whose original angles' errand is pi/2, and the clearance between two spiral original lines is 0.2-0.4cm, the distance from the spiral original line to the spiral terminal line is 1.2-1.4cm; on the photon with interval medium base board there arranges 6 rectangle holes of 2 rows and 3 lists, the length of three rectangle holes in the 1 rows are all 2.1-2.3cm,and the length of three rectangle holes in the 2 rows are all 1.5-1.7cm. The width of the 1,2,3 list is 0.8- 1.0,1.3-1.5,1.4-1.6cm.
Description
Technical field
The present invention relates to a kind of microstrip antenna, especially relate to a kind of 3G of being used for system and mobile terminal plane helical microstrip antenna.
Background technology
Along with the development of wireless communication system and user number, higher requirement is proposed the system communication capacity.For this reason, people have proposed 3-G (Generation Three mobile communication system), and the WCDMA that wherein adopts the Direct-Spread technology also provides broadband multimedia services such as image, data except traditional voice service is provided.The operating frequency range of WCDMA system radio frequency is 1920~2170MHz, frequency range reaches 250MHz, and relative bandwidth reaches 13%, and therefore the Antenna Design for the WCDMA portable terminal requires to have big bandwidth, small size, and on whole aximuthpiston, provide even covering, (Liu advances for Zhu Xiaowei, He Xiaoxiao more than 0dBi in gain, the planar inverted-F antenna [J] that is used for the 3g system and mobile terminal, mobile communication, 2002,12 (5): 66-68).
Commercial at present mobile phone terminal antenna mainly adopts whip antenna, and its shortcoming is that size is difficult for dwindling, and the existence of human body proximity effect causes the radiation direction covering inhomogeneous.And flat helical antenna is exactly this typical antenna that hangs down section, slab construction that grows up with the requirement of modern communications development, it with broadband, in light weight, section is low, can be conformal, distinct advantages such as low cost of manufacture, radiation efficiency height, obtained extensive studies and development.Therefore, research influence the use of flat helical antenna and the bandwidth of its broadening antenna, for the scope of application of expansion flat helical antenna, make flat helical antenna be applied even more extensively industrial, civilian and national defence significant.
Photon band gap (PBG, Photonic Band-Gap) structure can realize the periodic structure of photon band gap.Utilize its band resistance characteristic, can realize wideband filtered, improve efficiency of amplitude, improve the directional diagram of antenna.
Data shows, not seeing has the people that flat helical antenna is applied in the frequency range of 1920~2170MHz 3-G (Generation Three mobile communication system) terminal, mainly is that flat helical antenna is applied in more than the high band 8GHz both at home and abroad.
Summary of the invention
The object of the present invention is to provide a kind of antenna performance good, antenna size is little, and bandwidth reaches more than the 250MHz, and what can cover whole transmitting-receiving frequency range is used for 3G system and mobile terminal plane helical microstrip antenna.
The technical scheme that the present invention has adopted flat helical antenna to combine with the PBG technology.
The present invention is provided with the double side dielectric substrate, one side is the helix medium substrate, and another side is the photon band gap medium substrate, and medium substrate adopts glass fabric of epoxy resin (FR4) medium substrate, medium substrate is of a size of (4.9~5.1) cm * (4.9~5.1) cm, is preferably 5cm * 5cm.On the helix medium substrate, be provided with 2 arms, 2 edges of every one arm are made of the equiangular helical spiral that 2 initial angles differ pi/2, article two, the gap of helix starting point is 0.2~0.4cm, be preferably 0.3cm, the helix starting point constitutes to the equiangular helical spiral of spiral difference pi/2, and the gap of two helix starting points is 0.2~0.4cm, is preferably 0.3cm, the helix starting point to the distance between the helix terminal point (claim helix maximum outside diameter) R be 1.2~1.4cm, be preferably 1.3cm.On the photon band gap medium substrate, be provided with 2 row, 3 row totally 6 rectangular openings, the 1st row the 1st hole is of a size of (2.1~2.3) cm * (0.8~1.0) cm, be preferably 2.2cm * 0.9cm, the 1st row the 2nd hole is of a size of (2.1~2.3) cm * (1.3~1.5) cm, be preferably 2.2cm * 1.4cm, the 1st row the 3rd hole is of a size of (2.1~2.3) cm * (1.4~1.6) cm, is preferably 2.2cm * 1.5cm; The 2nd row the 1st hole is of a size of (1.5~1.7) cm * (0.8~1.0) cm, be preferably 1.6cm * 0.9cm, the 2nd row the 2nd hole is of a size of (1.5~1.7) cm * (1.3~1.5) cm, be preferably 1.6cm * 1.4cm, the 2nd row the 3rd hole is of a size of (1.5~1.7) cm * (1.4~1.6) cm, is preferably 1.6cm * 1.5cm.
Compare with existing flat helical antenna, because photon band gap (PBG, the Photonic Band-Gap) structure that the present invention adopts can realize the periodic structure of photon band gap, utilize its band resistance characteristic, can realize wideband filtered, improve efficiency of amplitude, improve the directional diagram of antenna.In microstrip antenna, realize pbg structure, can erode into the aperture (the maintenance dielectric substrate is constant) of periodic arrangement in ground plane upper edge microstrip line direction.Pbg structure is applied on the flat helical antenna, can reduces the size of antenna and the generation of surface wave, improve the efficient of antenna, improve the performance of antenna, the utilized bandwidth of extended antenna etc.The working frequency range that research can be used for WCDMA system radio frequency simultaneously can spread bandwidth PBG have great significance for the application of flat helical antenna engineering.
Description of drawings
Fig. 1 is the structure perspective diagram of the embodiment of the invention.
Fig. 2 is the helix medium substrate structural representation of the embodiment of the invention.
Fig. 3 is the flat helical antenna structural representation of the embodiment of the invention.
Fig. 4 is the photon band gap medium substrate structural representation of the embodiment of the invention.
Fig. 5 is the photonic band gap structure schematic diagram of the embodiment of the invention.
Fig. 6 is an actual match circuit diagram of the present invention.
Fig. 7 is a 2GHz H face actual measurement directional diagram of the present invention.
Fig. 8 is a 2GHz E face actual measurement directional diagram of the present invention.
Embodiment
Following examples will be described further technical scheme of the present invention and outstanding effect thereof in conjunction with the accompanying drawings.
Referring to Fig. 1-5, the present invention is provided with the double side dielectric substrate, simultaneously (front) is helix medium substrate 1, another side (back side) is a photon band gap medium substrate 2, medium substrate adopts glass fabric of epoxy resin (FR4) medium substrate, its dielectric constant is 4.4, the length and the width of medium substrate are 5cm, thickness is 0.8mm, on helix medium substrate 1, be provided with 2 arms, 2 edges of every one arm are made of the equiangular helical spiral that 2 initial angles differ pi/2, and the gap of two helix starting points is 0.3cm, the helix starting point to the distance between the helix terminal point (claim helix maximum outside diameter) R be 1.3cm.Be provided with 2 row, 3 row totally 6 rectangular openings on photon band gap medium substrate 2, the long L1 of 3 rectangular openings of the 1st row is 2.2cm, and the long L2 of 3 rectangular openings of the 2nd row is 1.6cm.1st, the wide W1 of 2,3 row rectangular openings, W2, W3 are respectively 0.9cm, 1.4cm, 1.5cm.
The match circuit figure of antenna Antenna as shown in Figure 6, L=10nH wherein, C1=3pF, C2=1pF.The tie point of L and C1 meets vector network analyzer Y.
Fig. 7 and 8 has provided the 2GHz H face and the E face directional diagram of embodiment of the invention actual measurement, and the amplitude of signal source is-15dBm.
Wherein, Fig. 7 is the H face directional diagram of the 2GHz of embodiment of the invention actual measurement, and two H face diagram shape are roughly the same as can be known by contrast, and antenna has two lobes, one between 180 °~270 °, another are between 0 °~120 ° and 320 °~360 °.Two lobes cover most of angle basically, and radiation has omni-directional.Fig. 8 is the E face directional diagram of the 2GHz of embodiment of the invention actual measurement, and as can be seen, the first half shape basically identical, main lobe have been compared some little difference with analogous diagram between 30 °~150 ° from Fig. 7 and 8, and the effect of emulation does not have the main lobe angle of actual measurement big.And, from measured drawing as can be seen, radiation leakage is arranged between 270 °~320 ° for the latter half, and this mainly is because the back side of antenna has pbg structure, has corroded square hole, electromagnetic wave has leakage from square hole.This is the negative interaction that pbg structure brings.
From the reflection coefficient S11 figure of the flat helical antenna of actual measurement as can be seen, the working band of antenna has been in 1.4~2.4GHz, the return loss in the band all-below the 10dB, the minimum echo loss is-21dB.Antenna S11 performance meets the demands in whole passband, and bandwidth reaches 1GHz, has improved the performance of flat helical antenna.
The flat helical antenna that adds match circuit is carried out the measurement of reflection coefficient, and from data as can be seen, respective frequencies is that the S11 of 1835MHz is-9.86dB, and respective frequencies is that the S11 of 2226MHz is-10.04dB.S11 is 391MHz less than the frequency range of-10dB, and (1920~2170MHz) have covered fully the transmitting-receiving frequency range of WCDMA.The pairing frequency of the minimum value of antenna reflection coefficient is 2109MHz, and S11 is-23.59dB.In fact antenna has reached designing requirement, and matching effect is also fine.After 2560MHz, the S11 value just is in-10dB always, from the wide band effect of flat helical antenna as can be seen just here.
In sum, the technology that the present invention adopts flat helical antenna to combine with photonic band gap structure, be the structure and the photonic band gap structure of flat helical antenna, scheme as can be seen from the S11 of emulation and actual test, antenna has covered this frequency band of 1920~2170MHz, has reached the requirement of 3G to the WCDMA standard.
Claims (6)
1, be used for 3G system and mobile terminal plane helical microstrip antenna, it is characterized in that being provided with the double side dielectric substrate, one side is the helix medium substrate, and another side is the photon band gap medium substrate, and the medium base is pulled and is of a size of 4.9~5.1cm * 4.9~5.1cm; On the helix medium substrate, be provided with 2 arms, 2 edges of every one arm are made of the equiangular helical spiral that 2 initial angles differ pi/2, article two, the gap of helix starting point is 0.2~0.4cm, and helix starting point to the distance R between the helix terminal point is 1.2~1.4cm; On the photon band gap medium substrate, be provided with 2 row, 3 row totally 6 rectangular openings, the 1st row the 1st hole is of a size of 2.1~2.3cm * 0.8~1.0cm, the 1st row the 2nd hole is of a size of 2.1~2.3cm * 1.3~1.5cm, and the 1st row the 3rd hole is of a size of 2.1~2.3cm * 1.4~1.6cm; The 2nd row the 1st hole is of a size of 1.5~1.7cm * 0.8~1.0cm, and the 2nd row the 2nd hole is of a size of 1.5~1.7cm * 1.3~1.5cm, and the 2nd row the 3rd hole is of a size of 1.5~1.7cm * 1.4~1.6cm.
2, the 3G system and mobile terminal plane helical microstrip antenna that is used for as claimed in claim 1 is characterized in that described medium substrate is the glass fabric of epoxy resin medium substrate.
3, the 3G system and mobile terminal plane helical microstrip antenna that is used for as claimed in claim 1 is characterized in that described medium substrate is of a size of 5cm * 5cm.
4, the 3G system and mobile terminal plane helical microstrip antenna that is used for as claimed in claim 1, the gap that it is characterized in that described two helix starting points is 0.3cm.
5, the 3G system and mobile terminal plane helical microstrip antenna that is used for as claimed in claim 1 is characterized in that described helix starting point to the distance R between the helix terminal point is 1.3cm.
6, the 3G system and mobile terminal plane helical microstrip antenna that is used for as claimed in claim 1, it is characterized in that described the 1st row the 1st hole is of a size of 2.2cm * 0.9cm, the 1st row the 2nd hole is of a size of 2.2cm * 1.4cm, and the 1st row the 3rd hole is of a size of 2.2cm * 1.5cm; The 2nd row the 1st hole is of a size of 1.6cm * 0.9cm, and the 2nd row the 2nd hole is of a size of 1.6cm * 1.4cm, and the 2nd row the 3rd hole is of a size of 1.6cm * 1.5cm.
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CNB2006100713714A CN100463289C (en) | 2006-03-24 | 2006-03-24 | Plane helical microstrip antenna for 3G system mobile terminal |
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Cited By (10)
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CN101304116B (en) * | 2008-06-27 | 2012-01-04 | 厦门大学 | Rectangle array photon band-gap ceramic plane helical dual-frequency-band antenna of radio frequency recognition system |
CN101304115B (en) * | 2008-06-27 | 2012-01-04 | 厦门大学 | Photon band-gap double-folding dipole dual frequency band antenna |
CN101304117B (en) * | 2008-06-27 | 2012-02-01 | 厦门大学 | Fractal dual-frequency-band ceramic antenna for radio frequency recognition system |
CN101304114B (en) * | 2008-06-27 | 2012-02-15 | 厦门大学 | Fractal photon band-gap folding line microstrip antenna for ultra-broadband system |
CN101271998B (en) * | 2008-04-25 | 2012-04-25 | 厦门大学 | Miniature folded dipole antenna with mirror-image structure for radio frequency recognition system |
CN102456947A (en) * | 2010-10-22 | 2012-05-16 | 北京协和航电科技有限公司 | Single-layer circularly symmetric GPS-BD (Global Position System-Big Dipper) dual-frequency microstrip antenna |
CN101383446B (en) * | 2008-10-21 | 2012-07-04 | 厦门大学 | Archimedes spiral antenna of graded dielectric constant with three frequency light quantum band-gap |
CN104319461A (en) * | 2014-10-01 | 2015-01-28 | 广东工业大学 | Artificial electromagnetic medium based broadband multi-mode satellite navigation antenna |
CN105161847A (en) * | 2015-08-19 | 2015-12-16 | 桂林电子科技大学 | Broadband high-gain circularly polarized antenna |
CN110544821A (en) * | 2018-05-28 | 2019-12-06 | 云南电网有限责任公司保山供电局 | Transmission line corona discharge detecting system |
Family Cites Families (5)
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US6219006B1 (en) * | 1999-02-17 | 2001-04-17 | Ail Systems, Inc. | High efficiency broadband antenna |
CN1121082C (en) * | 2001-03-19 | 2003-09-10 | 东南大学 | Broad-band circularly polarized antenna integrated on plane |
JP3821039B2 (en) * | 2002-04-09 | 2006-09-13 | 株式会社デンソー | Antenna device |
FR2845828B1 (en) * | 2002-10-11 | 2008-08-22 | Thomson Licensing Sa | METHOD FOR PRODUCING A PHOTONIC PROHIBITED BAND STRUCTURE (BIP) ON A MICROWAVE DEVICE AND SLIT-TYPE ANTENNAS USING SUCH A STRUCTURE |
CN1710747A (en) * | 2004-06-17 | 2005-12-21 | 上海无线电设备研究所 | Archimedian spiral antenna using photon band-gap as reflection chamber |
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CN101271998B (en) * | 2008-04-25 | 2012-04-25 | 厦门大学 | Miniature folded dipole antenna with mirror-image structure for radio frequency recognition system |
CN101304116B (en) * | 2008-06-27 | 2012-01-04 | 厦门大学 | Rectangle array photon band-gap ceramic plane helical dual-frequency-band antenna of radio frequency recognition system |
CN101304115B (en) * | 2008-06-27 | 2012-01-04 | 厦门大学 | Photon band-gap double-folding dipole dual frequency band antenna |
CN101304117B (en) * | 2008-06-27 | 2012-02-01 | 厦门大学 | Fractal dual-frequency-band ceramic antenna for radio frequency recognition system |
CN101304114B (en) * | 2008-06-27 | 2012-02-15 | 厦门大学 | Fractal photon band-gap folding line microstrip antenna for ultra-broadband system |
CN101383446B (en) * | 2008-10-21 | 2012-07-04 | 厦门大学 | Archimedes spiral antenna of graded dielectric constant with three frequency light quantum band-gap |
CN102456947A (en) * | 2010-10-22 | 2012-05-16 | 北京协和航电科技有限公司 | Single-layer circularly symmetric GPS-BD (Global Position System-Big Dipper) dual-frequency microstrip antenna |
CN104319461A (en) * | 2014-10-01 | 2015-01-28 | 广东工业大学 | Artificial electromagnetic medium based broadband multi-mode satellite navigation antenna |
CN104319461B (en) * | 2014-10-01 | 2017-12-22 | 广东工业大学 | Broadband multi-mode antenna for satellite navigation based on artificial electromagnetic medium |
CN105161847A (en) * | 2015-08-19 | 2015-12-16 | 桂林电子科技大学 | Broadband high-gain circularly polarized antenna |
CN105161847B (en) * | 2015-08-19 | 2018-08-10 | 桂林电子科技大学 | Wide band high-gain circular polarized antenna |
CN110544821A (en) * | 2018-05-28 | 2019-12-06 | 云南电网有限责任公司保山供电局 | Transmission line corona discharge detecting system |
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