CN103346389A - Monopole antenna based on fractal geometrical structure - Google Patents
Monopole antenna based on fractal geometrical structure Download PDFInfo
- Publication number
- CN103346389A CN103346389A CN2013102866841A CN201310286684A CN103346389A CN 103346389 A CN103346389 A CN 103346389A CN 2013102866841 A CN2013102866841 A CN 2013102866841A CN 201310286684 A CN201310286684 A CN 201310286684A CN 103346389 A CN103346389 A CN 103346389A
- Authority
- CN
- China
- Prior art keywords
- monopole antenna
- floor
- antenna based
- circular
- coaxial line
- 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.)
- Pending
Links
Images
Abstract
The invention relates to a monopole antenna, in particular to a monopole antenna based on a fractal geometrical structure. The monopole antenna based on the fractal geometrical structure aims at solving the problem that a traditional monopole antenna is narrow in bandwidth and large in size. The monopole antenna based on the fractal geometrical structure comprises a circular sheet assembly, a floor and a coaxial line, wherein the circular sheet assembly is fixedly installed in the middle of the upper surface of the floor, the upper end of the coaxial line is connected with the middle of the lower surface of the floor, an outer conductor of the coaxial line is contacted with the floor, an inner core of the coaxial line penetrates through the floor to be connected with the circular sheet assembly, the circular sheet assembly comprises two circular sheets, the two circular sheets are arranged in a crossed mode, and the surfaces of the two circular sheets are mutually perpendicular, the two circular sheets are respectively provided with two circular through holes from top to bottom sequentially, and a gap is left between the two through holes of each circular sheet. The monopole antenna based on the fractal geometrical structure is used in the wireless field.
Description
Technical field
The present invention relates to a kind of monopole antenna, be specifically related to a kind of monopole antenna based on the fractals structure.
Background technology
Monopole antenna or be called upright antenna and be perpendicular to the antenna that ground or conductive plane set up, be widely used in long, in, shortwave and ultrashort wave band.It is that upright a period of time and the infinitely great floor of h formed by length.The mirror image that influences available antenna on ground replaces, and monopole antenna just can equivalence be the symmetrical dipole of 2h for the free space inwall is long like this.Certainly, such equivalence is only to ground half space equivalence, and reason is not have radiation field below the floor.
Because the operating frequency of monopole antenna depends on the size of antenna, therefore traditional monopole antenna is a kind of narrow-band antenna, and the scope of application is subjected to the restriction of its narrow-band characteristic.The monopole antenna that the monopole antenna of disc is more common, its bandwidth characteristic has had tangible improvement.But often have bigger size, the size on its floor especially, this has been caused certain restriction to its application.
" fractal " this concept is that the French mathematician Mandelbrot proposed first in 1975.He has made up the shape that such class complexity described in this word from Latin " Fractus ", and they all have certain intrinsic self-similarity and from property of the same clan on geometry.So-called self-similarity refers to that geometric shape has among a small circle copied whole geometric shape with the yardstick that has reduced, and briefly is exactly local form is similar to configuration.And refer among a small circle geometric shape and whole and incomplete similarity from property of the same clan, but distort or distortion desirable different scale factor to some extent.Fractal structure has two big key properties: self-similarity and space fillibility.
People such as Jia Jiade proposed to form the low side-lobe antenna battle array with random fractal in 1986 at first.But, up to nineteen ninety-five, the Koln reported first application of fractal geometry to antenna element design.He has introduced traditional oscillator or loop aerial has been done the method that fractals are handled, and namely with fractal mode bending wire, makes total arc length constant, and because each iteration is all introduced new bending, thereby make big or small corresponding having reduced of antenna.This has just reflected the space fillibility of fractal structure.So also just caused the miniaturization of antenna.Thereupon, since the mid-90 in 20th century, a lot of universities and colleges and scientific research institution have all carried out the research to fractal antenna in the world.Now it has obtained application in the multiple portable terminal of wireless communication system and in the equipment such as radio-frequency (RF) identification (RFID) system.
Summary of the invention
The present invention for solve traditional monopole antenna narrow bandwidth with and larger-size problem, and then a kind of monopole antenna based on the fractals structure is proposed.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes wafer package, floor and coaxial line, wafer package is fixedly mounted on the middle part of floor upper surface, the upper end of coaxial line is connected with the middle part of floor lower surface, and the outer conductor of coaxial line contacts with the floor, the inner core of coaxial line passes the floor and is connected with wafer package, described wafer package comprises two disks, two disks are arranged in a crossed manner, and two disk surfaces are vertical mutually, be provided with two manholes on each disk from top to bottom successively, leave the gap between two manholes.
The invention has the beneficial effects as follows: the present invention is fractal by carried out single order at disk, and such two same disks are arranged perpendicular to the floor quadrature, has finally realized broadband character and the miniaturization of antenna; The present invention has very wide bandwidth, can satisfy ultra-wideband communications and wireless frequency spectrum and detect requirement, and has the antenna of same operating characteristic than other, the present invention has less size, be convenient to actual application, simultaneously, owing to have pore structure on the disk, make that the windage of this antenna is less, can better application in many mobile devices; Through simulating, verifying, the present invention can realize the bandwidth of 2.9Ghz-20Ghz; What is more important, than other the antenna with same operating characteristic, the size of this antenna is much smaller, is convenient to actual application.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention, Fig. 2 is the standing-wave ratio based on the monopole antenna of fractals structure, wherein Frequency represents frequency, VSWR represents standing-wave ratio, Fig. 3 is based on the monopole antenna of the fractals structure E face directional diagram when the 3Ghz, wherein Theta represents luffing angle, Degree represents the size of angle, Abs represents absolute value, phi represents level angle, Fig. 4 is based on the monopole antenna of the fractals structure E face directional diagram when the 6Ghz, Fig. 5 is based on the monopole antenna of the fractals structure E face directional diagram when the 9Ghz, Fig. 6 is based on the monopole antenna of the fractals structure E face directional diagram when the 11Ghz, Fig. 7 is based on the monopole antenna of the fractals structure H face directional diagram when the 3Ghz, Fig. 8 is based on the monopole antenna of the fractals structure H face directional diagram when the 6Ghz, Fig. 9 is based on the monopole antenna of the fractals structure H face directional diagram when the 9Ghz, and Figure 10 is based on the monopole antenna of the fractals structure H face directional diagram when the 11Ghz.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the described a kind of monopole antenna based on the fractals structure of present embodiment comprises wafer package, floor 1 and coaxial line 2, wafer package is fixedly mounted on the middle part of floor 1 upper surface, the upper end of coaxial line 2 is connected with the middle part of floor 1 lower surface, and the outer conductor of coaxial line 2 contacts with floor 1, the inner core of coaxial line 2 passes floor 1 and is connected with wafer package, described wafer package comprises two disks 3, two disks 3 are arranged in a crossed manner, and two disk 3 surfaces are vertical mutually, be provided with two manhole 3-1 on each disk 3 from top to bottom successively, leave the gap between two manhole 3-1.
Embodiment two: in conjunction with Fig. 1 present embodiment is described, the floor 1 of the described a kind of monopole antenna based on the fractals structure of present embodiment is circular floor 1, and the radius on circular floor 1 is 50mm, and the thickness on circular floor 1 is 0.3mm.
The technique effect of present embodiment is: monopole antenna is doublet antenna by the equivalence of floor mirror image, makes its radiation characteristic with symmetrical dipole (a first half space at the floor).In order to realize equivalence preferably, generally need the floor to have bigger size.The design then reduces the size on floor greatly.Other composition and annexation are identical with embodiment one.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, the radius of each disk 3 of the described a kind of monopole antenna based on the fractals structure of present embodiment is 9.6mm, and the thickness of each disk 3 is 0.3mm.
The technique effect of present embodiment is: change general monopole antenna the monopole antenna of disc into, help the broadening of the bandwidth of antenna like this, namely improved the narrow-band characteristic of traditional monopole antenna to a certain extent.Other composition and annexation are identical with embodiment one.
Embodiment four: in conjunction with Fig. 1 present embodiment is described, the radius of each manhole 3-1 of the described a kind of monopole antenna based on the fractals structure of present embodiment is 4.7mm～4.75mm.
The technique effect of present embodiment is: by utilizing fractal theory, disk is opened the through hole of such size, has changed the CURRENT DISTRIBUTION on the antenna, thereby further obviously broadening the bandwidth of antenna.And this helps to realize the miniaturization of antenna.Other composition and annexation are identical with embodiment one.
Embodiment five: in conjunction with Fig. 1 present embodiment is described, the radius of each manhole 3-1 of the described a kind of monopole antenna based on the fractals structure of present embodiment is 4.75mm.
The technique effect of present embodiment is: as mentioned above, this mode can be good at the bandwidth of broadening antenna, and realizes the miniaturization of antenna.Find that by simulation optimization when the radius of manhole was 4.75mm, this antenna had best performance.Other composition and annexation are identical with embodiment four.
By Fig. 2 to Figure 10 as can be seen, the present invention is operated in the frequency band range of 2.9-20Ghz, and its antenna pattern has better stability, shows omnidirectional's characteristic, can satisfy the requirement of unlimited frequency spectrum detection and ultra-wideband communications etc. well.Traditional monopole antenna narrow bandwidth, size is big, range of application is limited shortcoming have been solved.
Claims (5)
1. monopole antenna based on the fractals structure, it is characterized in that: described a kind of monopole antenna based on the fractals structure comprises wafer package, floor (1) and coaxial line (2), wafer package is fixedly mounted on the middle part of floor (1) upper surface, the upper end of coaxial line (2) is connected with the middle part of floor (1) lower surface, and the outer conductor of coaxial line (2) contacts with floor (1), the inner core of coaxial line (2) passes floor (1) and is connected with wafer package, described wafer package comprises two disks (3), two disks (3) are arranged in a crossed manner, and two disks (3) surface is vertical mutually, be provided with two manholes (3-1) on each disk (3) from top to bottom successively, leave the gap between two manholes (3-1).
2. according to the described a kind of monopole antenna based on the fractals structure of claim 1, it is characterized in that: floor (1) is circular floor (1), and the radius of circular floor (1) is 50mm, and the thickness of circular floor (1) is 0.3mm.
3. according to the described a kind of monopole antenna based on the fractals structure of claim 1, it is characterized in that: the radius of each disk (3) is 9.6mm, and the thickness of each disk (3) is 0.3mm.
4. according to the described a kind of monopole antenna based on the fractals structure of claim 1, it is characterized in that: the radius of each manhole (3-1) is 4.7mm～4.75mm.
5. according to the described a kind of monopole antenna based on the fractals structure of claim 4, it is characterized in that: the radius of each manhole (3-1) is 4.75mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102866841A CN103346389A (en) | 2013-07-09 | 2013-07-09 | Monopole antenna based on fractal geometrical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102866841A CN103346389A (en) | 2013-07-09 | 2013-07-09 | Monopole antenna based on fractal geometrical structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346389A true CN103346389A (en) | 2013-10-09 |
Family
ID=49281172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102866841A Pending CN103346389A (en) | 2013-07-09 | 2013-07-09 | Monopole antenna based on fractal geometrical structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103346389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252821A (en) * | 2016-08-25 | 2016-12-21 | 武汉滨湖电子有限责任公司 | A kind of antenna being easily installed and dismantling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127977A (en) * | 1996-11-08 | 2000-10-03 | Cohen; Nathan | Microstrip patch antenna with fractal structure |
| CN1523709A (en) * | 2003-01-30 | 2004-08-25 | ��ķɭ���ó��˾ | Broadband antenna with omnidirectional radiation |
-
2013
- 2013-07-09 CN CN2013102866841A patent/CN103346389A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127977A (en) * | 1996-11-08 | 2000-10-03 | Cohen; Nathan | Microstrip patch antenna with fractal structure |
| CN1523709A (en) * | 2003-01-30 | 2004-08-25 | ��ķɭ���ó��˾ | Broadband antenna with omnidirectional radiation |
Non-Patent Citations (1)
| Title |
|---|
| SHARMA, M.M EL.AT: "Printed fractal elliptical monopole antenna for UWB application", 《RECENT ADVANCES IN MICROWAVE THEORY AND APPLICATIONS, 2008.》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252821A (en) * | 2016-08-25 | 2016-12-21 | 武汉滨湖电子有限责任公司 | A kind of antenna being easily installed and dismantling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Parchin et al. | Dual-polarized MIMO antenna array design using miniaturized self-complementary structures for 5G smartphone applications | |
| US8421696B2 (en) | Dual polarization antenna structure, radome and design method thereof | |
| CN102570058B (en) | Compound multi-antenna system and wireless communication device thereof | |
| Cheng et al. | Printed slot planar inverted cone antenna for ultrawideband applications | |
| US11289823B2 (en) | Antenna and electronic device using same | |
| CN103703620B (en) | Wideband dual-polarization array antenna and base station | |
| US10910727B2 (en) | Vivaldi horn antennas incorporating FPS | |
| CN102800954B (en) | Antenna unit, antenna module and multi-antenna module | |
| US10530059B2 (en) | Folding dipole antenna, wireless communication module and method of constructing the same | |
| CN110838619B (en) | Dual-frequency two-unit MIMO antenna based on discrete triangular parasitic structure | |
| So et al. | Microwave and millimeter-wave MIMO antenna using conductive ITO film | |
| Tripathi et al. | A compact frequency‐reconfigurable fractal UWB antenna using reconfigurable ground plane | |
| Malekpoor | Comparative investigation of reflection and band gap properties of finite periodic wideband artificial magnetic conductor surfaces for microwave circuits applications in X‐band | |
| Bao et al. | Design and discussion of a broadband cross‐dipole with high isolation and low cross‐polarisation utilising strong mutual coupling | |
| CN202513285U (en) | Multi-polarization microstrip patch antenna for loading zero order resonator | |
| CN110265779B (en) | Dual-cross broadband high-low elevation gain satellite navigation terminal antenna | |
| Feng et al. | U‐shaped bow‐tie magneto‐electric dipole antenna with a modified horned reflector for ultra‐wideband applications | |
| CN110444876B (en) | High-gain broadband circularly polarized antenna and wireless communication equipment | |
| CN103346389A (en) | Monopole antenna based on fractal geometrical structure | |
| CN102570043A (en) | Multi-polarization microstrip patch antenna loading zero-order resonator | |
| CN105655700A (en) | Double-frequency end-fire printed antenna | |
| Wang et al. | Single-fed single-patch broadband circularly polarized antenna for UHF RFID reader applications | |
| Simpson et al. | Frequency-dependent feeding methods for broadband vivaldi arrays with minimum half-power beamwidth (HPBW) variation | |
| Zürcher | Tripod omnidirectional low profile antenna: A vertically polarized antenna with 90% bandwidth | |
| CN103346388A (en) | Ultra wide band monopole antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131009 |