CN103746185A - Minitype fractal ultra-wideband symmetrical ring and vibrator combined antenna - Google Patents
Minitype fractal ultra-wideband symmetrical ring and vibrator combined antenna Download PDFInfo
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- CN103746185A CN103746185A CN201410035461.2A CN201410035461A CN103746185A CN 103746185 A CN103746185 A CN 103746185A CN 201410035461 A CN201410035461 A CN 201410035461A CN 103746185 A CN103746185 A CN 103746185A
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Abstract
The invention discloses a minitype ultra-wideband symmetrical ring and vibrator combined antenna with a fractal structure. The minitype ultra-wideband symmetrical ring and vibrator combined antenna is characterized in that a top-layer radiating unit and a bottom-layer radiating unit with the same design structure and in anti-symmetric arrangement are respectively arranged on a dielectric substrate with the dielectric constant in a range of 2-20, each of the top-layer radiating unit and the bottom-layer radiating unit consists of an antipodal semi-loop radiating unit and a polygon vibrator unit, the top-layer antipodal semi-loop radiating unit and the bottom-layer antipodal semi-loop radiating unit are connected through a metalized via hole for forming a symmetric ring, and after the symmetric ring is combined with symmetric vibrators, a complete antenna unit is formed. The minitype ultra-wideband symmetrical ring and vibrator combined antenna has the advantages of novel structure, small size, low manufacturing cost and the like, is not sensitive to mounting occasions, and can be directly integrated with a radio frequency circuit of a differential structure, and compared with a symmetrical ring and vibrator combined antenna without a fractal structure, the size of the antenna is reduced due to the adoption of the fractal structure.
Description
Technical field
The present invention relates to the fractal ultra broadband symmetrical ring-oscillator of a kind of miniaturization combined antenna, belong to microwave technical field.
Background technology
In recent years, along with the development of wireless communication technology, Ultra-wideband Communication Technology enjoys attention.It is generally acknowledged, relative bandwidth exceedes 25% antenna and belongs to ultra-wideband antenna, Ultra-wideband Communication Technology has that transmission rate is high, strong anti-interference performance, very bandwidth are wide, good confidentiality, the feature such as with low cost, at numerous areas such as radio communication, microwave imagings, has broad application prospects.On the other hand, for ultra-wideband communications, not only require ultra-wideband antenna in its working band, to there is good impedance matching property, stable radiation directivity, gain characteristic and the polarization characteristic of relatively flat, and wish that antenna volume is enough little, with low cost, be convenient to processing and install.
Traditional ultra-wideband antenna, as helical antenna, logarithm periodic antenna and cone antenna etc., although all there is ultra broadband characteristic,, they have plenty of stereochemical structure, are unfavorable for compact applications.In order to realize the miniaturization of antenna, guaranteeing that antenna has under the gain characteristic and polarization characteristic condition of good impedance matching property, stable radiation directivity, relatively flat in working band, in order to improve the gain of antenna, make its greatest irradiation beam position be parallel to (that is: end-fire characteristic) in the direction of antenna place plane, to meet the needs of " point-to-point " application (as: short-range high speed file read-write system), the present invention will propose the fractal ultra-wideband antenna structure of a kind of new miniaturization.
Summary of the invention
Technical problem to be solved of the present invention is the problem existing for background technology, a kind of combined antenna by the fractal symmetrical dipole forming and anti-pode line of rabbet joint radiating element is proposed, this combined antenna contrast does not add fractal structural antenna, there is better low frequency characteristic, its novel structure, volume is little, section size is extremely low and be convenient to make and realize, can be directly and front radio-frequency circuit integrate.
The present invention adopts following technical scheme for solving above technical problem:
The fractal ultra broadband symmetrical ring-oscillator of a kind of miniaturization combined antenna, comprises medium substrate (1), top layer anti-pode line of rabbet joint radiating element (2), bottom anti-pode line of rabbet joint radiating element (3), top layer oscillator unit (4), bottom oscillator unit (5), described top layer anti-pode line of rabbet joint radiating element (2) and top layer oscillator unit (4) formation top layer radiating element printing are arranged on the top layer of medium substrate (1), described bottom anti-pode line of rabbet joint radiating element (3) and bottom oscillator unit (5) formation bottom radiating element printing are arranged on the bottom of medium substrate (1), wherein top layer radiating element and bottom radiative unit structure and measure-alike, and arrange with respect to medium substrate (1) antisymmetry, described top layer oscillator unit (4) all has fractal structure (7) with bottom oscillator unit (5), described fractal structure (7) comprises the horizontal fractal structure in upper edge (8), the horizontal fractal structure in lower edge (9), vertical fractal structure (10), the horizontal fractal structure in described upper edge (8) and the horizontal fractal structure in lower edge (9) are along oscillator unit center line symmetry, the horizontal fractal structure in described upper edge (8) comprising: in bottom oscillator unit (4), respectively dig three rectangles with the upper edge of top layer oscillator unit (5) and form respectively the first spill district (11), the second spill district (12), the 3rd spill district (13), on three limits in the second spill district (12), respectively add a square area (15), in the first spill district (11), lead on the edge in the second spill district (12), the second spill district (12) leads on the edge in the 3rd spill district (13), and the 3rd spill district (13) lead on the edge of oscillator unit vertical side edge and respectively add a square area (15), described vertical fractal structure (10) comprising: the perpendicular edge place in top layer oscillator unit (4) and bottom oscillator unit (5) respectively adds two square area (14), in the centre of two square area (14) along adding a square area (15) on vertical line, in the upper square area (15) that respectively adds below of two square area (14), described top layer anti-pode line of rabbet joint radiating element (2) is anti-pode semi-ring path radiation unit with bottom anti-pode line of rabbet joint radiating element (3), by metallization via hole (6), is communicated with up and down, forms a symmetrical ring, described top layer anti-pode line of rabbet joint radiating element (2) respectively has a upper hypotenuse with bottom anti-pode line of rabbet joint radiating element (3), in the midpoint of upper hypotenuse, cuts out a rectangular region (16).
As pocket super-broadband symmetrical ring-oscillator combined antenna of the present invention, further optimize: the dielectric constant range of described medium substrate (1) is 2-20.
Described the first spill district (11), the 3rd spill district (13) are of a size of: long: 1-1.5mm, and wide: 0.3-0.5mm; The length in described the second spill district (12): 1-2mm, wide: 0.5-1mm; The length of side of square area (14): 0.8-1.2mm in vertical fractal structure (10); Square (15) length of side: 0.2-0.5mm; The length of rectangular region (16): 2.5-3.5mm, wide: 0.5-1.5mm.
As pocket super-broadband symmetrical ring-oscillator combined antenna of the present invention, further optimize: between the grading structure of described bottom anti-pode semi-ring path radiation unit (3) and the grading structure of top layer anti-pode semi-ring path radiation unit (2), there is respectively angle of declination (17) and top rade (18); The scope of wherein said angle of declination (17) is: 86 ° to 90 °, the scope of described top rade (18) is: 21 ° to 31 °; Described top layer oscillator unit (4) all has distributing point inclination angle (19) with bottom oscillator unit (5); The scope at wherein said distributing point inclination angle (19) is: 13 ° to 81 °.
As pocket super-broadband symmetrical ring-oscillator combined antenna of the present invention, further optimize: the number of described metallization via hole is 1-5.
As pocket super-broadband symmetrical ring-oscillator combined antenna of the present invention, further optimize: described top layer oscillator unit (4) adopts symmetrical dual feed structure to carry out feed with bottom oscillator unit (5).
The present invention adopts technique scheme, has following technique effect:
The present invention is by adopting fractal structure, effectively increased the electrical length of antenna, the impedance bandwidth of antenna is 2.8GHz-11.69GHz(by return loss lower than-10dB), ratio reaches 4.17:1, and there is same volume, do not add the contrast antenna of fractal structure, lowest operating frequency is 3.28GHz, and bandwidth ratio is 3.7:1, and in working band, fractal structure improves 1.5dBi than the gain flatness that does not add fractal structure.When this antenna is realized wideband operation characteristic, also adopt the structure of full symmetric, size is little, novel structure, and manufacture craft is simple, and cost of manufacture is cheap.
Accompanying drawing explanation
Fig. 1 is Facad structure and the reference coordinate schematic diagram of antenna.
Fig. 2 is side structure and the reference coordinate schematic diagram of antenna.
Fig. 3 is the antenna return loss characteristic curve that utilizes IE3D software to calculate.
Fig. 4 is the antenna pattern that adopts IE3D software to calculate.
Fig. 5 is the antenna gain curve that adopts IE3D software to calculate.
Number in the figure: the 1st, medium substrate, the 2nd, top layer anti-pode semi-ring path radiation unit, the 3rd, bottom anti-pode semi-ring path radiation unit, the 4th, top layer oscillator unit, the 5th, bottom oscillator unit, the 6th, metallization via hole, the 7th, the fractal structure of oscillator whole unit, the 8th, the horizontal fractal structure in upper edge, the 9th, the horizontal fractal structure in lower edge, the 10th, vertical fractal structure, 11, 12, 13 is respectively three rectangles that upper edge and lower edge cut out, the 14th, in perpendicular edge, add square, the 15th, on multiple limits, add square, the 16th, rectangle that hypotenuse digs on anti-pode semi-ring path radiation unit, 17, the 18th, the angle of declination of top layer anti-pode semi-ring path radiation unit 2 and bottom anti-pode semi-ring path radiation unit 3, top rade, the 19th, the distributing point inclination angle of top layer oscillator unit 4 and bottom oscillator unit 5.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Contrast accompanying drawing 1, Fig. 2, the present invention proposes the fractal ultra broadband symmetrical ring-oscillator of a kind of miniaturization combined antenna, its structure is: antenna is produced on medium substrate 1, and radiating element consists of top layer radiating element and bottom radiating element, and both structures, size are identical; Top layer radiating element consists of top layer anti-pode semi-ring path radiation unit 2 and top layer oscillator unit 4 respectively, and bottom radiating element consists of bottom anti-pode semi-ring path radiation unit 3 and bottom oscillator unit 5 respectively; Top layer radiating element and bottom radiating element couple together by metallization via hole 6.
Top layer anti-pode semi-ring path radiation unit 2 and bottom anti-pode semi-ring path radiation unit 3 cut rectangular region 16 in the center on hypotenuse edge thereon; This structure adopts an iteration, in the situation that antenna size is constant, makes near the be less than-10dB of frequency range return loss of 7.5GHz corresponding to anti-pode half loop inner side slot line length, reaches broadband characteristic.
There is fractal structure 7 top layer oscillator unit 4 and bottom oscillator unit 5; This structure adopts iteration twice, concave regions 11,12,13 and square area 14 form iteration one time, institute adds square area 15 and forms second iteration, and more effective taking up space makes the energy that it can effectively be coupled from feed transmission line to free space in very little space.Fractal space-filling is reduced the size of antenna, has effectively increased the electrical length of antenna, and the more conventional antenna of lower limit operating frequency is reduced more than 10%, has kept the characteristic of small sized wide-band.
Described fractal structure 7 comprises the horizontal fractal structure 8 in upper edge, the horizontal fractal structure 9 in lower edge, vertical fractal structure 10; The horizontal fractal structure 8 in described upper edge and the horizontal fractal structure 9 in lower edge are along oscillator unit center line symmetry.
The horizontal fractal structure 8 in described upper edge comprises: in bottom oscillator unit 4, respectively cut out three rectangles with the upper edge of top layer oscillator unit 5 and form respectively the first spill district 11, the second spill district 12, the 3rd spill district 13, on three limits in the second spill district 12, respectively add a square area 15, in the first spill district 11, lead on the edge in the second spill district 12, the second spill district 12 leads on the edge in the 3rd spill district 13, and the 3rd spill district 13 respectively adds a square area 15 on the edge of oscillator unit vertical side edge.
Described vertical fractal structure 10 comprises: in top layer oscillator unit 4, respectively add two square area 14 with the perpendicular edge place of bottom oscillator unit 5, in the centre of two square area 14 along adding a square area 15 on vertical line; In two square area 14 upper, respectively add below a square area 15;
Top layer anti-pode semi-ring path radiation unit 2 and bottom anti-pode semi-ring path radiation unit 3 all adopt approximate inverted L-shaped grading structure and all contain angle of declination structure 17 and top rade structure 18, and its scope is respectively 86 °-90 °, 21 °-31 °; Top layer oscillator unit 4 and bottom oscillator unit 5 are on common printing vibrator, cut part drift angle and form, and they all contain distributing point inclination angle 19, and its scope is 13 °-81 °.
Reference frame and accompanying drawing 4,5 in contrast accompanying drawing 1, accompanying drawing 4 (a)-(f) provided respectively two main working face directional diagrams (xy-plane and zy-plane) of 3.875GHz, 6.125GHz and 9.875GHz, solid line in figure is main pole polarization component, and chain-dotted line is cross polar component; Accompanying drawing 5 has provided the gain characteristic in working frequency range.From Fig. 4 and Fig. 5, in whole working frequency range, antenna has metastable directional radiation properties (its main beam pointing+y direction), cross polarization level in main beam is lower than more than main pole 20dB, and there is the gain-frequency characterisitic of relatively flat, therefore can think that directional diagram bandwidth, gain bandwidth and the impedance bandwidth of this antenna are basically identical.
The present invention utilizes printed circuit board technology or integrated circuit technology, designs top layer radiating element and bottom radiating element on medium substrate, and utilizes metallization via hole that they are coupled together.
Described top layer oscillator unit 4 adopts symmetrical dual feed structure to carry out feed with bottom oscillator unit 5.The symmetrical configuration of this antenna, can realize antenna and difference/symmetry and drive the Integration Design of microwave circuit.
In sum, the fractal ultra broadband symmetrical ring-oscillator of miniaturization combined antenna, utilizes metallization via hole that antisymmetric radiating element is coupled together and forms the structure of a symmetrical ring-type.The fractal structure adopting, has increased the electrical length of antenna effectively, and the more conventional antenna of lower limit operating frequency is reduced more than 10%, has kept the characteristic of small sized wide-band; The balanced structure of symmetrical ring-oscillator combination, has eliminated the dependency characteristic of antenna to other radio circuit ground plates, makes its antenna be applicable to different installation occasions, improve versatility.In addition, this antenna volume is light and handy, novel structure, with low cost, is also applicable to making the label type antenna in mini-plant.
Claims (6)
1. the fractal ultra broadband symmetrical ring-oscillator of a miniaturization combined antenna, is characterized in that: comprise medium substrate (1), top layer anti-pode line of rabbet joint radiating element (2), bottom anti-pode line of rabbet joint radiating element (3), top layer oscillator unit (4), bottom oscillator unit (5); Described top layer anti-pode line of rabbet joint radiating element (2) and top layer oscillator unit (4) formation top layer radiating element printing are arranged on the top layer of medium substrate (1), described bottom anti-pode line of rabbet joint radiating element (3) and bottom oscillator unit (5) formation bottom radiating element printing are arranged on the bottom of medium substrate (1), wherein top layer radiating element and bottom radiative unit structure and measure-alike, and arrange with respect to medium substrate (1) antisymmetry; Described top layer oscillator unit (4) all has fractal structure (7) with bottom oscillator unit (5);
Described fractal structure (7) comprises the horizontal fractal structure in upper edge (8), the horizontal fractal structure in lower edge (9), vertical fractal structure (10); The horizontal fractal structure in described upper edge (8) and the horizontal fractal structure in lower edge (9) are along oscillator unit center line symmetry;
The horizontal fractal structure in described upper edge (8) comprising: in bottom oscillator unit (4), respectively dig three rectangles with the upper edge of top layer oscillator unit (5) and form respectively the first spill district (11), the second spill district (12), the 3rd spill district (13), on three limits in the second spill district (12), respectively add a square area (15), in the first spill district (11), lead on the edge in the second spill district (12), the second spill district (12) leads on the edge in the 3rd spill district (13), and the 3rd spill district (13) lead on the edge of oscillator unit vertical side edge and respectively add a square area (15),
Described vertical fractal structure (10) comprising: the perpendicular edge place in top layer oscillator unit (4) and bottom oscillator unit (5) respectively adds two square area (14), in the centre of two square area (14) along adding a square area (15) on vertical line; In the upper square area (15) that respectively adds below of two square area (14);
Described top layer anti-pode line of rabbet joint radiating element (2) is anti-pode semi-ring path radiation unit with bottom anti-pode line of rabbet joint radiating element (3), by metallization via hole (6), is communicated with up and down, forms a symmetrical ring; Described top layer anti-pode line of rabbet joint radiating element (2) respectively has a upper hypotenuse with bottom anti-pode line of rabbet joint radiating element (3), in the midpoint of upper hypotenuse, cuts out a rectangular region (16).
2. pocket super-broadband symmetrical ring-oscillator combined antenna according to claim 1, is characterized in that: the dielectric constant range of described medium substrate (1) is 2-20.
3. pocket super-broadband symmetrical ring-oscillator combined antenna according to claim 1, is characterized in that:
Described the first spill district (11), the 3rd spill district (13) are of a size of: long: 1-1.5mm, and wide: 0.3-0.5mm; The length in described the second spill district (12): 1-2mm, wide: 0.5-1mm; The length of side of square area (14): 0.8-1.2mm in vertical fractal structure (10); Square (15) length of side: 0.2-0.5mm; The length of rectangular region (16): 2.5-3.5mm, wide: 0.5-1.5mm.
4. pocket super-broadband symmetrical ring-oscillator combined antenna according to claim 1, is characterized in that: between top layer anti-pode line of rabbet joint radiating element (2) and the grading structure of bottom anti-pode line of rabbet joint radiating element (3), have respectively angle of declination (17) and top rade (18); The scope of wherein said angle of declination (17) is: 86 ° to 90 °, the scope of described top rade (18) is: 21 ° to 31 °; Described top layer oscillator unit (4) all has distributing point inclination angle (19) with bottom oscillator unit (5); The scope at wherein said distributing point inclination angle (19) is: 13 ° to 81 °.
5. pocket super-broadband symmetrical ring-oscillator combined antenna according to claim 1, is characterized in that: the number of described metallization via hole is 1-5.
6. pocket super-broadband symmetrical ring-oscillator combined antenna according to claim 1, is characterized in that: described top layer oscillator unit (4) adopts symmetrical dual feed structure to carry out feed with bottom oscillator unit (5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635250A (en) * | 2019-09-12 | 2019-12-31 | 中国电子科技集团公司第三十八研究所 | VHF wave band tightly-coupled planar dipole array antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895009A (en) * | 2010-06-13 | 2010-11-24 | 南京邮电大学 | Double-frequency broad-band antenna with symmetrical dipole-tapered slot line combined structure |
| CN103107420A (en) * | 2013-01-30 | 2013-05-15 | 南京邮电大学 | Mini-type ultra wide band symmetrical ring-vibrator combined antenna |
| CN203085761U (en) * | 2013-03-14 | 2013-07-24 | 厦门大学嘉庚学院 | Multi-frequency fractal folding dipole antenna for radio frequency identification system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895009A (en) * | 2010-06-13 | 2010-11-24 | 南京邮电大学 | Double-frequency broad-band antenna with symmetrical dipole-tapered slot line combined structure |
| CN103107420A (en) * | 2013-01-30 | 2013-05-15 | 南京邮电大学 | Mini-type ultra wide band symmetrical ring-vibrator combined antenna |
| CN203085761U (en) * | 2013-03-14 | 2013-07-24 | 厦门大学嘉庚学院 | Multi-frequency fractal folding dipole antenna for radio frequency identification system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635250A (en) * | 2019-09-12 | 2019-12-31 | 中国电子科技集团公司第三十八研究所 | VHF wave band tightly-coupled planar dipole array antenna |
| CN110635250B (en) * | 2019-09-12 | 2021-01-29 | 中国电子科技集团公司第三十八研究所 | VHF wave band tightly-coupled planar dipole array antenna |
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