CN104701604A - Inverted-F broadband antenna suitable for vehicle's mobile communication - Google Patents
Inverted-F broadband antenna suitable for vehicle's mobile communication Download PDFInfo
- Publication number
- CN104701604A CN104701604A CN201410830231.5A CN201410830231A CN104701604A CN 104701604 A CN104701604 A CN 104701604A CN 201410830231 A CN201410830231 A CN 201410830231A CN 104701604 A CN104701604 A CN 104701604A
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- antenna
- radiant body
- mobile communication
- broadband
- base plate
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Abstract
The invention discloses an inverted-F broadband antenna suitable for vehicle's mobile communication. The inverted-F broadband antenna comprises a monopole radiating body and a metallic baseboard, wherein the monopole radiating body is formed by thickening one rectangular metal sheet by forming an edge profile, and the different positions along the edge profile of the rectangular radiating body are inward provided with multiple grooves, the monopole radiating body is arranged on the metallic baseboard, the long edge of the monopole radiating body is placed along a horizontal direction, the feed is supplied to the gap between the left lower endpoint of the monopole radiating body and the baseboard, and the right lower endpoint to the metallic baseboard is in a short-circuit status. The antenna operates in high and low frequency bands, the low frequency band is 689MHz-960MHz (VSWR (Voltage Standing Wave Ratio) is no more than 2.15 and the bandwidth is 31.60%), the high frequency band is 1260MHz-6500MHz (VSWR is no more than 2.17 and the bandwidth is 135.05%), and the antenna covers all mobile communication frequency bands of three operators 2G/3G/4G, thus the antenna is extremely wide in frequency band, excellent in directivity, high in efficiency, small in size, low in profile and easy to process; the antennas is suitable for the optimized antenna type of high-speed rail mobile communication and beneficial to reduce the air resistance of a train which runs at a high speed.
Description
Technical field
The present invention relates to communication antenna equipment technical field, relate to a kind of antenna being applicable to vehicle cellular mobile communication more specifically.
Background technology
At present, mobile communication technology day by day becomes information age people and to obtain information indispensable approach, and realize " anyone, at any time, Anywhere, obtaining information in any way " dream therefore gradually become reality.Along with economic development, the travel activity of people is day by day frequent, and the time spent on a vehicle also gets more and more.Naturally, people ride in an automobile and the vehicles such as high ferro time, it is desirable to enjoy the high-quality wireless communication service as the same in urban district with family.Current, highway and the many employings of high-speed railway build special mobile base station along the line to realize the seamless coverage of at full line.Because running velocity is very fast, as high ferro speed per hour reaches 350km/h, cause handover frequent, Doppler effect is remarkable, and communication link robustness is declined greatly.In addition, because body construction intensity is large, cause radio wave transmission loss to increase, cab signal level declines.In view of this, repeater in car is adopted just can to overcome above-mentioned difficulties well.But antenna needs to be installed on car body surface as headstock top, when train so just can be caused to run at high speed, produce larger windage.In sum, the car antenna of high-performance, broadband, low section, miniaturization, light weight, low cost becomes the key of hot-short wireless communication technology.
Summary of the invention
Object of the present invention is just intended to the broad-band antenna solution for hot-short especially high ferro train mobile communication provides a kind of high-performance, low section, miniaturization, light weight, structure simple, with low cost.
The present invention adopts following technical solution to realize above-mentioned purpose: a kind of broadband inversed F antenna being applicable to vehicle mobile communication, comprise monopole radiant body and metal base plate, it is characterized in that, described monopole radiant body is obtained through the thickening of edge contour figuration by one piece of rectangular metal sheet, diverse location along block-like radiator edge contour inwardly opens multiple groove, monopole radiant body stands on metal base plate, long edge horizontal direction is placed, feed is carried out in gap between the left side lower extreme point and base plate of monopole radiant body, right side lower extreme point is short-circuited to metal base plate.
Further illustrating as such scheme, the long limit L of described monopole radiant body in the horizontal direction (X-axis), broadside W vertically (Z axis) is positioned over a major axis is a (X-axis), minor axis is above the oval metal base plate of b (Y-axis), the base of monopole radiant body is h apart from bottom plate heights, carry out feed from the gap between left side lower extreme point and base plate, right side lower extreme point is short-circuited to base plate; Then, by being set to monopole radiant body to have the metallic monolith of certain thickness t to increase broadband further and to realize impedance matching, feed is carried out through base plate from left side lower extreme point again with 50 Ω standard coaxial lines, the inner wire of 50 Ω standard coaxial lines connects lower extreme point, outer conductor connecting bottom board, in order to reduce antenna section height and overall dimensions, geometry figuration is carried out to increase current path length to the edge of rectangular monopole radiant body; In addition, the side grooving of monopole radiant body forms recess, and the edge contour of monopole radiant body connects recess and forms flange, to cut the mode of thin metal derby to alleviate entire physical weight and to save material.
Reliable and convenient in order to be electrically connected, 50 Ω coaxial lines directly do not connect distributing point, but pass through the coaxial connector of flanged dish, as N-M, SMA-M connector is connected with antenna.
Described monopole radiant body edge inner homogeneous grooving, be apart from edge be that S cuts to central area, its degree of depth D can not too shallow also should not be excessively dark, need comprehensive bandwidth, coupling, saving material and difficulty of processing several respects factor consider comprehensively.
Described monopole radiant body edge figuration, refers to and its four rectangle straight flanges is carried out geometry bending, radiused process or replace by spline curve, require according to working band and dimension reduction the edge line pattern determining whole contour shape.
Described monopole radiant body edge figuration profile, it is the distributing point from left end, upwards extend to outward flange first groove successively, outward flange second groove, the end of outward flange second groove upwards extends bending and is connected with the first horizontal segment, the end of horizontal segment bends downwards and is extended with outward flange the 3rd groove, the end of outward flange the 3rd groove upwards extends bending, and be connected with the second horizontal segment, the end of the second horizontal segment is bent to stepped edges downwards, the bottom of stepped edges is through right-hand member short dot, extend to distributing point direction and form inward flange first groove be connected between distributing point and short dot.
Rounding process is all carried out in the described all corners of radiant body outer edge.
Described monopole radiant body and oval base plate material therefor are the stronger metal material of conductivity, comprise silver, fine copper, gold, alloyed copper, fine aluminium and die casting aluminium.
The beneficial effect that the present invention adopts above-mentioned technical solution to reach is:
1, the present invention takes rectangle monopole radiant body long edge horizontal direction to place to reduce section height; Distributing point and short dot to choose on rectangular sheet two at a distance of maximum location point, make low-frequency current have sufficiently long path; Rectangular monopole radiant body edge surrounding diverse location inwardly opens multiple groove, and carries out geometry bending to straight flange, to increase current path further, to reduce antenna size; The groove opened in these not only plays a part to extend current path, and the shape of interior recessing, position, size have not only determined the length of current path, also affects band gap width and mismatch, also determines passband width simultaneously and mates fine or not.
2, monopole radiant body has certain thickness metal derby by becoming, then is shorted to floor in conjunction with end, thus realizes the good impedance match in wide frequency range.
3, the groove of uniform depth is cut from block-like radiator adjacent edges position toward core, to alleviate entire physical weight and to save material.
4, rounding process is all carried out in all corners of radiant body outer edge, to facilitate processing and manufacturing.
5, broadband inversed F antenna feed impedance is close to 50 Ω, but not with the direct feed of standard coaxial line, but pass through the coaxial connector of flanged dish, as N-M, SMA-M connector is connected with antenna, antenna feeder is electrically connected more reliable and convenient.
6, broadband inversed F antenna has the advantage of broadband, good directionality, the high and low section of efficiency, miniaturization, light weight, low cost, be especially applicable to bullet train mobile communication, but its application is not limited thereto.
Accompanying drawing explanation
Fig. 1 is broadband inversed F antenna front view;
Fig. 2 is broadband inversed F antenna vertical view;
Fig. 3 is broadband inversed F antenna side view;
Fig. 4 is broadband inversed F antenna floor and feedback point position;
Fig. 5 is broadband inversed F antenna reflection coefficient | S
11|;
Fig. 6 is broadband inversed F antenna f
1real gain pattern (solid line-Phi=0 °, the XOZ plane of=698MHz;-Theta=90 °, dotted line, XOY plane), G=3.31dBi;
Fig. 7 is broadband inversed F antenna f
2real gain pattern (solid line-Phi=0 °, the XOZ plane of=1710MHz;-Theta=90 °, dotted line, XOY plane), G=4.22dBi;
Fig. 8 is real gain pattern (solid line-Phi=0 °, the XOZ plane of broadband inversed F antenna f1=6000MHz;-Theta=90 °, dotted line, XOY plane), G=6.10dBi;
Fig. 9 is broadband inversed F antenna efficiency η and frequency f relation curve.
Description of reference numerals: 1, monopole radiant body; 1-1, outward flange first groove; 1-2, outward flange second groove; 1-3, outward flange the 3rd groove; 1-4, right-hand member short dot; 1-5, inward flange first groove; 1-6, left end distributing point; 1-7, coaxial connector; 1-8, rounding; 1-9, the first horizontal segment; 1-10, the second horizontal segment; 1-11, stepped edges; 2, metal base plate; 3, recess.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is explained in detail.
The present invention is a kind of broadband inversed F antenna being applicable to vehicle mobile communication, comprise monopole radiant body 1 and metal base plate 2, monopole radiant body is obtained through the thickening of edge contour figuration by one piece of rectangular metal sheet, diverse location along block-like radiator edge contour inwardly opens multiple groove, monopole radiant body 1 stands on metal base plate 2, long edge horizontal direction is placed, and feed is carried out in the gap between the left side lower extreme point and base plate of monopole radiant body, and right side lower extreme point is short-circuited to metal base plate.Described monopole radiant body edge figuration, refers to and its four rectangle straight flanges is carried out geometry bending, radiused process or replace by spline curve, require according to working band and dimension reduction the edge line pattern determining whole contour shape.
The long limit L of described monopole radiant body 1 in the horizontal direction (X-axis), broadside W vertically (Z axis) is positioned over a major axis is a (X-axis), minor axis is above the oval metal base plate of b (Y-axis), the base of monopole radiant body is h apart from bottom plate heights, carry out feed from the gap between left side lower extreme point and base plate, right side lower extreme point is short-circuited to base plate; Then, by being set to monopole radiant body to have the metallic monolith of certain thickness t to increase broadband further and to realize impedance matching, feed is carried out through base plate from left side lower extreme point again with 50 Ω standard coaxial lines, the inner wire of 50 Ω standard coaxial lines connects lower extreme point, outer conductor connecting bottom board, in order to reduce antenna section height and overall dimensions, geometry figuration is carried out to increase current path length to the edge of rectangular monopole radiant body; In addition, the side grooving of monopole radiant body forms recess 3, and the edge contour of monopole radiant body connects recess 3 and forms flange, to cut the mode of thin metal derby to alleviate entire physical weight and to save material.
Monopole radiant body 1 edge figuration profile, the distributing point 1-6 from left end, upwards extend to outward flange first groove 1-1 successively, outward flange second groove 1-2, the end of outward flange second groove upwards extends bending and is connected with the first horizontal segment 1-9, the end of the first horizontal segment bends downwards and is extended with outward flange the 3rd groove 1-3, the end of outward flange the 3rd groove upwards extends bending, and be connected with the second horizontal segment 1-10, the end of the second horizontal segment is bent to stepped edges 1-11 downwards, the bottom of stepped edges is through right-hand member short dot 1-4, extend to distributing point direction and form inward flange first the groove 1-5 be connected between distributing point and short dot.Rounding 1-8 process is all carried out in all corners of radiant body outer edge.Monopole radiant body and oval base plate material therefor are the stronger metal material of conductivity, comprise silver, fine copper, gold, alloyed copper, fine aluminium and die casting aluminium.Consider conductive capability and processing difficulty or ease, cost, the selection of material is fine aluminium or die casting aluminium here.
Reliable and convenient in order to be electrically connected, 50 Ω coaxial lines directly do not connect distributing point, but pass through the coaxial connector 1-7 of flanged dish, as N-M, SMA-M connector is connected with antenna.
Described monopole radiant body edge inner homogeneous grooving, be apart from edge be that S cuts to central area, its degree of depth D can not too shallow also should not be excessively dark, need comprehensive bandwidth, coupling, saving material and difficulty of processing several respects factor consider comprehensively.
As shown in Figure 5, inverse-F antenna has dual-band broadband characteristic, low-frequency range is 698MHz-960MHz (VSWR≤2.15, bandwidth is 31.60%), high band is 1260MHz-6500MHz (VSWR≤2.17, bandwidth is 135.05%), cover all mobile communication frequency ranges of three large operator 2G/3G/4G, comprise GSM 900/1800, DCS, PCS, UMTS, WLAN, TD-SCDMA, WCDMA, CDMA2000, TD-LTE, FD-LTE.In addition from Fig. 6-Fig. 9, inverse-F antenna all has good horizontal omnidirectional radiation characteristic when low frequency, intermediate frequency and high frequency, and in whole band, real gain is 2.3dBi-6dBi, and efficiency is higher than 85%.Know accordingly, this antenna is suitable for various mobile communication frequency range broadbands cover antenna, especially low section height, is conducive to reducing the train air drag suffered when running at high speed.
The present invention compared with prior art, this invention takes following technical measures: 1, place long for rectangle monopole edge horizontal direction to reduce section height; 2, distributing point and short dot to choose on rectangular sheet two at a distance of maximum location point, as shown in Figure 1, make low-frequency current have sufficiently long path; 3, surrounding diverse location in rectangular radiation patch edge inwardly opens multiple groove, and carries out geometry bending to straight flange, to increase current path further, to reduce antenna size.It should be noted that, the groove opened in these not only plays a part to extend current path, also on original broadband character, produces band gap because of its fault of construction.And the width of band gap, mismatch all have substantial connection with the shape of groove, position, size.In addition, in order to realize and standard 50 Ω impedance matching, rectangular sheet be become there is certain thickness metal derby, then being shorted to floor in conjunction with end, just can realize the good impedance match in very broadband.Finally, for alleviating entire physical weight and saving material, cut the groove of uniform depth from monopole adjacent edges position toward core, choosing of its degree of depth D is the result considering the many factors such as bandwidth, coupling, saving material and difficulty of processing.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. one kind is applicable to the broadband inversed F antenna of vehicle mobile communication, comprise monopole radiant body and metal base plate, it is characterized in that, described monopole radiant body is obtained through the thickening of edge contour figuration by a rectangular metal sheet, diverse location along block-like radiator edge contour inwardly opens multiple groove, and monopole radiant body stands on metal base plate, and long edge horizontal direction is placed, feed is carried out in gap between the left side lower extreme point and base plate of monopole radiant body, and right side lower extreme point is short-circuited to metal base plate.
2. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, it is characterized in that, the long limit L of described monopole radiant body in the horizontal direction, to be vertically positioned over a major axis be a to broadside W, minor axis is above the oval metal base plate of b, the base of monopole radiant body is apart from base plate certain altitude, carry out feed from the gap between left side lower extreme point and base plate, right side lower extreme point is short-circuited to base plate.
3. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, it is characterized in that, described monopole radiant body is set to the metallic monolith with certain thickness t, feed is carried out through base plate from left side lower extreme point with 50 Ω standard coaxial lines, the inner wire of 50 Ω standard coaxial lines connects lower extreme point, outer conductor connecting bottom board.
4. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, is characterized in that, the side grooving of described monopole radiant body forms recess, and the edge contour of monopole radiant body connects recess and forms flange.
5. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, is characterized in that, 50 Ω coaxial lines are connected with monopole radiant body by the coaxial connector of flanged dish.
6. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, is characterized in that, the edge figuration of described monopole radiant body, is its four straight flanges are carried out geometry bending, radiused process respectively or replace by spline curve.
7. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, it is characterized in that, described monopole radiant body edge figuration profile, it is the distributing point from left end, upwards extend to outward flange first groove successively, outward flange second groove, the end of outward flange second groove upwards extends bending and is connected with the first horizontal segment, the end of horizontal segment bends downwards and is extended with outward flange the 3rd groove, the end of outward flange the 3rd groove upwards extends bending, and be connected with the second horizontal segment, the end of the second horizontal segment is bent to stepped edges downwards, the bottom of stepped edges is through right-hand member short dot, extend to distributing point direction and form inward flange first groove be connected between distributing point and short dot.
8. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, is characterized in that, rounding process is all carried out in the described all corners of radiant body outer edge.
9. a kind of broadband inversed F antenna being applicable to vehicle mobile communication according to claim 1, it is characterized in that, described monopole radiant body and metal base plate material therefor are the one in silver, fine copper, gold, alloyed copper, fine aluminium and die casting aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410830231.5A CN104701604A (en) | 2014-12-27 | 2014-12-27 | Inverted-F broadband antenna suitable for vehicle's mobile communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410830231.5A CN104701604A (en) | 2014-12-27 | 2014-12-27 | Inverted-F broadband antenna suitable for vehicle's mobile communication |
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| CN104701604A true CN104701604A (en) | 2015-06-10 |
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| CN201410830231.5A Pending CN104701604A (en) | 2014-12-27 | 2014-12-27 | Inverted-F broadband antenna suitable for vehicle's mobile communication |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252843A (en) * | 2016-09-28 | 2016-12-21 | 上海移为通信技术股份有限公司 | A kind of VHF car antenna |
| WO2017041362A1 (en) * | 2015-09-09 | 2017-03-16 | 江苏省东方世纪网络信息有限公司 | Dual-frequency antenna |
| CN107834166A (en) * | 2017-10-10 | 2018-03-23 | 广东盛路通信科技股份有限公司 | A kind of double frequency omnibearing high ferro antenna |
| WO2019068265A1 (en) | 2017-10-06 | 2019-04-11 | Huawei Technologies Co., Ltd. | Multi-band antennas and mimo antenna arrays for electronic device |
| CN111211406A (en) * | 2020-03-24 | 2020-05-29 | 上海大学 | Monopole high-speed railway antenna |
| CN116345160A (en) * | 2023-05-29 | 2023-06-27 | 中国铁道科学研究院集团有限公司通信信号研究所 | Multi-system fusion vehicle-mounted antenna and vehicle-mounted communication system |
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| CN1765030A (en) * | 2003-04-28 | 2006-04-26 | 胡贝尔和茹纳股份公司 | Broadband antenna apparatus |
| CN203800159U (en) * | 2014-04-18 | 2014-08-27 | 广东盛路通信科技股份有限公司 | Wideband omnidirectional antenna device |
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| US6853341B1 (en) * | 1999-10-04 | 2005-02-08 | Smarteq Wireless Ab | Antenna means |
| CN1765030A (en) * | 2003-04-28 | 2006-04-26 | 胡贝尔和茹纳股份公司 | Broadband antenna apparatus |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017041362A1 (en) * | 2015-09-09 | 2017-03-16 | 江苏省东方世纪网络信息有限公司 | Dual-frequency antenna |
| CN106252843A (en) * | 2016-09-28 | 2016-12-21 | 上海移为通信技术股份有限公司 | A kind of VHF car antenna |
| CN106252843B (en) * | 2016-09-28 | 2021-05-11 | 上海移为通信技术股份有限公司 | VHF vehicle-mounted antenna |
| WO2019068265A1 (en) | 2017-10-06 | 2019-04-11 | Huawei Technologies Co., Ltd. | Multi-band antennas and mimo antenna arrays for electronic device |
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| EP3688842A4 (en) * | 2017-10-06 | 2020-11-25 | Huawei Technologies Co., Ltd. | Multi-band antennas and mimo antenna arrays for electronic device |
| CN107834166A (en) * | 2017-10-10 | 2018-03-23 | 广东盛路通信科技股份有限公司 | A kind of double frequency omnibearing high ferro antenna |
| CN111211406A (en) * | 2020-03-24 | 2020-05-29 | 上海大学 | Monopole high-speed railway antenna |
| CN111211406B (en) * | 2020-03-24 | 2020-12-25 | 上海大学 | Monopole high-speed railway antenna |
| CN116345160A (en) * | 2023-05-29 | 2023-06-27 | 中国铁道科学研究院集团有限公司通信信号研究所 | Multi-system fusion vehicle-mounted antenna and vehicle-mounted communication system |
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Application publication date: 20150610 |
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