CN102694253B - Balance microstrip line feed ultra-wideband dipole antenna - Google Patents
Balance microstrip line feed ultra-wideband dipole antenna Download PDFInfo
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- CN102694253B CN102694253B CN201210190699.3A CN201210190699A CN102694253B CN 102694253 B CN102694253 B CN 102694253B CN 201210190699 A CN201210190699 A CN 201210190699A CN 102694253 B CN102694253 B CN 102694253B
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Abstract
The invention discloses a balance microstrip line feed ultra-wideband dipole antenna which relates to the field of ultra-wideband dipole antennas, and aims to solve the problems of low wideband indicator, poor feed balance, poor pattern symmetry and quite large size of an antenna of an existing ultra-wideband antenna. A first semi-circular vibrator and a second semi-circular vibrator are horizontally arranged on the upper end surface of a medium plate; the upper patches of a balance microstrip line are horizontally arranged on the upper end surface of the medium plate along a longitudinal direction; one ends of the upper patches of the balance microstrip line are contacted with the first semi-circular vibrator, and the other ends of the upper patches of the balance microstrip line are arranged on the edge of the medium plate; one ends of the lower patches of the balance microstrip line are connected with the second semi-circular vibrator through metallized through holes, and the other ends of the lower patches of the balance microstrip line are arranged on the edge of the medium plate; and the upper patches and the lower patches of the balance microstrip line are arranged correspondingly up and down. The ultra-wideband dipole antenna is adopted as an element for transmitting or receiving electromagnetic wave in an ultra-wideband wireless communication system.
Description
Technical field
The present invention relates to a kind of ultra broadband dipole antenna, belong to technical field of radio.
Background technology
Antenna is the critical component that transmits and receives signal in radio ultra wide band system, extensive use along with super-broadband tech, the research of ultra-wideband antenna is also become to important day by day, and the design of ultra-wideband antenna is also more and more subject to people's attention, and the ultra-wideband antenna of new model and new capability continues to bring out.Ultra-wideband antenna also drives the development of wide-band frequency spectrograph and receiver simultaneously, impels broad-band antenna to have good acceptance and emitting performance in the whole band limits of EMC.
UWB is applicable at a high speed, in-plant wireless personal communications, is also applicable to the digitized audio-video wireless link of short distance, the relevant civil areas such as short distance broadband high-speed wireless access.Be worth explanation, the actual use spectral range of the indoor UWB communication of stipulating in UWB technology is 3.1～10.6GHz, and it is 3.42:1 than the bandwidth ratio of low-limit frequency (highest frequency with); Stipulate centre frequency to be greater than the 500MHz bandwidth of need to the have at least-10dB of UWB system of 2.5GHz simultaneously, and to centre frequency the UWB system lower than 2.5GHz, relative bandwidth at least should reach 20%.
Along with the proposition of ultra-wideband communications mode, all channel antenna that works in 3.1～10.6GHz emerges in an endless stream, and mainly take the various evolving forms of biconical antenna as main, and this comprises butterfly antenna, tear antenna, gradual change slot antenna etc. and variant thereof.Ultra-wideband antenna also comprises TEM horn antenna, reflector antenna, reflection from lens surface antenna and ultra-wideband antenna array etc. in addition.
At present, ultra broadband linear polarized antenna comprises circular cone element antenna, butterfly wire antenna and some special-shaped oscillator unipole antennas, above-mentioned ultra-wideband antenna all has broadband character, but existing ultra-wideband antenna can only cover the bandwidth of 3.1～10.6GHz of FCC regulation, higher frequency band is not covered or covers lessly, existing ultra-wideband antenna is unipole antenna, feed balance is poor, omni-directional directional diagram symmetry is poor and antenna size is larger, be unfavorable for being integrated in printed circuit, be not also suitable for the field that needs miniature antenna.
Summary of the invention
There is for solving existing ultra-wideband antenna the problem that broadband index is low, feed balance is poor, omni-directional directional diagram symmetry is poor and antenna size is larger in the present invention, and then a kind of ultra broadband dipole antenna of balance feed microstrip line is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: the ultra broadband dipole antenna of balance feed microstrip line of the present invention comprises dielectric-slab, metal-loaded disk, paster on balance microstrip line, paster under balance microstrip line, the first semicircle oscillator and the second semicircle oscillator, described the first semicircle oscillator and the second semicircle oscillator are all horizontally set on the upper surface of dielectric-slab, the straight flange of the straight flange of the first semicircle oscillator and the second semicircle oscillator is symmetricly set on the left and right end of dielectric-slab, the radius of described the first semicircle oscillator and the second semicircle oscillator equates to arrange, the distance of center circle of the first semicircle oscillator and the second semicircle oscillator is 2～3mm from the difference of the diameter with the first semicircle oscillator, described metal-loaded disk is horizontally set on the upper surface of dielectric-slab, the center of circle of metal-loaded disk 2 is positioned on the circular arc of the first semicircle oscillator 5, the angle becoming between the straight line at the straight line at the place, the center of circle of the center of circle of metal-loaded disk and the first semicircle oscillator and the place, the center of circle of the center of circle of the first semicircle oscillator and the second semicircle oscillator is 10～30 °, on described balance microstrip line, paster is longitudinally horizontally set on the upper surface of dielectric-slab, on balance microstrip line, one end of paster contacts with the first semicircle oscillator, on balance microstrip line, the other end of paster is positioned on the edge of dielectric-slab, under described balance microstrip line, paster is arranged on the bottom face of dielectric-slab, on described dielectric-slab, be processed with metallization via hole, metallization via hole is positioned on the arcuate midway point of the second semicircle oscillator, under balance microstrip line, one end of paster is connected with the second semicircle oscillator by metallization via hole, under balance microstrip line, the other end of paster is positioned on the edge of dielectric-slab, paster and the upper and lower corresponding setting of paster under balance microstrip line on described balance microstrip line.
The present invention has following beneficial effect:
The first semicircle oscillator and the second semicircle oscillator of ultra broadband dipole antenna of the present invention are symmetrical dipole structure, directional diagram has symmetry, because the profile of oscillator is semicircle gradual change form, reduced the reflection of electromagnetic wave that the sudden change of structure partly causes, antenna at the frequency band reflection coefficient of 3.1～20GHz lower than-10dB, than bandwidth, reached 6.5:1, greatly widened the impedance bandwidth of antenna, thereby reached the characteristic of ultra broadband, broadband index and omni-directional directional diagram bandwidth are high, metal-loaded disk has improved the reflection coefficient of antenna in the frequency range of 8.5～13.3GHz simultaneously, compare with the antenna that only has a pair of halfround bar slice oscillator not loading, more than reflectance value in this frequency range has reduced 2dB,
The feed form of ultra broadband dipole antenna of the present invention is balance feed microstrip line, feed balance is good, area occupied is little, there is good miniaturization effect, simultaneously, ultra broadband dipole antenna balance feed microstrip line form of the present invention goes for traditional feeder line feeds such as coaxial line, can also be applicable to printed circuit board (PCB) integrated transmission-line feed, applied widely;
Ultra broadband dipole antenna configuration of the present invention is compact, size is little, can be integrated on the circuit board of mobile terminal, greatly realize the miniaturization of antenna, applicable to fields such as electromagnetic environment monitor, special measurement equipment, can also be applied to the occasion that needs Miniaturisation ultra-wideband antenna.
Accompanying drawing explanation
Fig. 1 is the vertical view of the ultra broadband dipole antenna of balance feed microstrip line of the present invention, Fig. 2 is the upward view of the ultra broadband dipole antenna of balance feed microstrip line of the present invention, Fig. 3 is dipole antenna reflection coefficient test curve of the present invention, Fig. 4 is the directional diagram of dipole antenna of the present invention E face when 3.1GHz, Fig. 5 is the directional diagram of dipole antenna of the present invention H face when 3.1GHz, Fig. 6 is the directional diagram of dipole antenna of the present invention E face when 12GHz, and Fig. 7 is the directional diagram of dipole antenna of the present invention H face when 12GHz.
Embodiment
Embodiment one: in conjunction with Fig. 1～2 explanation, the ultra broadband dipole antenna of the balance feed microstrip line of present embodiment comprises dielectric-slab 1, metal-loaded disk 2, on balance microstrip line, paster 3, under balance microstrip line, paster 4, the first semicircle oscillator 5 and the second semicircle oscillator 6, described the first semicircle oscillator 5 and the second semicircle oscillator 6 are all horizontally set on the upper surface of dielectric-slab 1, the straight flange of the straight flange of the first semicircle oscillator 5 and the second semicircle oscillator 6 is symmetricly set on the left and right end of dielectric-slab 1, the radius of described the first semicircle oscillator 5 and the second semicircle oscillator 6 equates to arrange, the distance of center circle of the first semicircle oscillator 5 and the second semicircle oscillator 6 is 2～3mm from the difference D of the diameter with the first semicircle oscillator 5, described metal-loaded disk 2 is horizontally set on the upper surface of dielectric-slab 1, the center of circle of metal-loaded disk 2 is positioned on the circular arc of the first semicircle oscillator 5, the angle α becoming between the straight line at the straight line at the place, the center of circle of the center of circle of metal-loaded disk 2 and the first semicircle oscillator 5 and the place, the center of circle of the center of circle of the first semicircle oscillator 5 and the second semicircle oscillator 6 is 10～30 °, on described balance microstrip line, paster 3 is longitudinally horizontally set on the upper surface of dielectric-slab 1, on balance microstrip line, one end of paster 3 contacts with the first semicircle oscillator 5, on balance microstrip line, the other end of paster 3 is positioned on the edge of dielectric-slab 1, under described balance microstrip line, paster 4 is arranged on the bottom face of dielectric-slab 1, on described dielectric-slab 1, be processed with metallization via hole 1-1, metallization via hole 1-1 is positioned on the arcuate midway point of the second semicircle oscillator 6, under balance microstrip line, one end of paster 4 is connected with the second semicircle oscillator 6 by metallization via hole 1-1, under balance microstrip line, the other end of paster 4 is positioned on the edge of dielectric-slab 1, paster 3 and the corresponding setting Shang Xia 4 of paster under balance microstrip line on described balance microstrip line.
The semicircle oscillator 5 of described metal-loaded disk 2, first and the second semicircle oscillator 6 form the radiant body part of dipole antenna, and on described metallization via hole 1-1, balance microstrip line, under paster 3 and balance microstrip line, paster 4 forms the microstrip-fed line part of balance;
The feed place of the microstrip-fed line of described balance part is used coaxial fitting feed, or with microstrip feed line in the integrated circuit feed that is directly connected;
On balance microstrip line, paster 3 is 10mm to the beeline L of dielectric-slab 1 left end.
Embodiment two: described in present embodiment, the relative dielectric constant of dielectric-slab 1 is 4.4, thickness is 1.5mm.So design, makes the section of antenna low, and can use application FR4 epoxy plate manufacture more widely, can significantly reduce costs.Other composition is identical with execution mode one with annexation.
Embodiment three: in conjunction with Fig. 1 explanation, the radius R 1 of the semicircle oscillator 5 of present embodiment first and the radius R 2 of the second semicircle oscillator 6 are 11mm.So design, can guarantee that the initial operating frequency of antenna has extremely wide frequency band in the time of lower.Other composition is identical with execution mode one or two with annexation.
Embodiment four: in conjunction with Fig. 1 explanation, on present embodiment balance microstrip line, the profile of paster 3 is right-angled trapezium, the upper base of right-angled trapezium is 70～75% with the ratio of going to the bottom, and on balance microstrip line, the hypotenuse of paster 3 contacts with the first semicircle oscillator 5 with the acute angle portion forming of going to the bottom.So design, the form that the border that can make feeder line is gradual change, to reduce feeder line and the electromagnetic reflection in radiant body junction.Other composition is identical with execution mode three with annexation.
Embodiment five: in conjunction with Fig. 1 explanation, the length of the upper base L1 of present embodiment right-angled trapezium is 12mm, and the length of the L2 that goes to the bottom of right-angled trapezium is 16.8mm, and the high H of right-angled trapezium is 1.4mm.So design, can meet feeder line and have certain balance transmission length, reaches balance, and mate with the input impedance of radiant body while making feeder current arrive radiant body.Other composition is identical with execution mode four with annexation.
Embodiment six: in conjunction with Fig. 1 explanation, the distance of center circle of the semicircle oscillator 5 of present embodiment first and the second semicircle oscillator 6 is 2.4mm from the difference D of the diameter with the first semicircle oscillator 5.So design, can be so that the input impedance of radiant body be stably in extremely wide frequency band.Other composition is identical with execution mode one, two, four or five with annexation.
Embodiment seven: in conjunction with Fig. 2 explanation, under present embodiment balance microstrip line, the length L 3 of paster 4 is 17.3mm, and under balance microstrip line, the width L4 of paster 4 is 1mm.So design, can effectively reduce the reflection coefficient of ultra-wideband antenna of the present invention.Other composition is identical with execution mode six with annexation.
Embodiment eight: in conjunction with Fig. 1 explanation, the length L 5 of present embodiment dielectric-slab 1 is 27.8mm, and the width W of dielectric-slab 1 is 24.4mm.So design, makes antenna have less size, and polarised direction size is only 25% of maximum functional wavelength, is 50% of common half-wave doublet antenna.Other composition is identical with execution mode one, two, four, five or seven with annexation.
Embodiment nine: in conjunction with Fig. 1 explanation, described in present embodiment, dipole antenna is circuitron, and on metal-loaded disk 2, balance microstrip line, under paster 3, balance microstrip line, paster 4, metallization via hole 1-1, the first semicircle oscillator 5 and the second semicircle oscillator 6 are all printed on dielectric-slab 1.So design, can be integrated with printed circuit board (PCB) easily.Other composition is identical with execution mode eight with annexation.
Operation principle:
The first semicircle oscillator 5 of ultra broadband dipole antenna of the present invention and the second semicircle oscillator 6 form effective radiant body part of dipole antenna, and on described metallization via hole 1-1, balance microstrip line, under paster 3 and balance microstrip line, paster 4 forms the microstrip-fed line part of balance;
Ultra broadband dipole antenna of the present invention can form omnidirectional radiation, the electric current of metal radiation surface is mainly distributed in the edge of sheet metal, edge current plays Main Function to radiation, because the radiation meeting of standing wave electric current forms two main lobes at its E face, its direction is perpendicular to the flow direction of electric current, by the first semicircle oscillator 5 and the second semicircle oscillator 6, be symmetrical arranged, make the field stack of the main lobe of two standing wave electric currents, forming one is the directional diagram of 8-shaped at antenna E face, thereby realizes the omnidirectional radiation of antenna;
From the test result of Fig. 3, can find out, antenna at the frequency band reflection coefficient of 3.1-20GHz lower than-10dB, than bandwidth, be 6.45:1, covered whole C/X/Ku wave band, part has covered S and K wave band, reached the index of ultra-wideband antenna, also arrived FCC(US Federal Communication Committee) requirement of covering 3.1-10.6GHz of regulation;
From the test result of Fig. 4～7, can find out, antenna E face directional diagram when 3.1GHz and 12GHz presents 8 words, H face directional diagram presents sub-circular, it is the directional diagram of typical omnidirectional antenna, when the problem that dielectric material exists and test, the impact of fixture can make antenna pattern and simulation result there is some difference, and antenna of the present invention can transmit and receive for omnibearing electromagnetic wave.
Claims (9)
1. the ultra broadband dipole antenna of a balance feed microstrip line, it is characterized in that: described dipole antenna comprises dielectric-slab (1), metal-loaded disk (2), paster on balance microstrip line (3), paster under balance microstrip line (4), the first semicircle oscillator (5) and the second semicircle oscillator (6), described the first semicircle oscillator (5) and the second semicircle oscillator (6) are all horizontally set on the upper surface of dielectric-slab (1), the straight flange of the straight flange of the first semicircle oscillator (5) and the second semicircle oscillator (6) is symmetricly set on the left and right end of dielectric-slab (1), the radius of described the first semicircle oscillator (5) and the second semicircle oscillator (6) equates to arrange, the distance of center circle of the first semicircle oscillator (5) and the second semicircle oscillator (6) is 2～3mm from poor (D) of the diameter with the first semicircle oscillator (5), described metal-loaded disk (2) is horizontally set on the upper surface of dielectric-slab (1), the center of circle of metal-loaded disk (2) is positioned on the circular arc of the first semicircle oscillator (5), the angle (α) becoming between the straight line at the place, the center of circle of the center of circle of metal-loaded disk (2) and the first semicircle oscillator (5) and the center of circle of the first semicircle oscillator (5) and the straight line at the place, the center of circle of the second semicircle oscillator (6) is 10～30 °, on described balance microstrip line, paster (3) is longitudinally horizontally set on the upper surface of dielectric-slab (1), one end of paster on balance microstrip line (3) contacts with the first semicircle oscillator (5), the other end of paster on balance microstrip line (3) is positioned on the edge of dielectric-slab (1), under described balance microstrip line, paster (4) is arranged on the bottom face of dielectric-slab (1), on described dielectric-slab (1), be processed with metallization via hole (1-1), metallization via hole (1-1) is positioned on the arcuate midway point of the second semicircle oscillator (6), one end of paster under balance microstrip line (4) is connected with the second semicircle oscillator (6) by metallization via hole (1-1), the other end of paster under balance microstrip line (4) is positioned on the edge of dielectric-slab (1), paster (3) and the upper and lower corresponding setting of paster (4) under balance microstrip line on described balance microstrip line.
2. the ultra broadband dipole antenna of balance feed microstrip line according to claim 1, is characterized in that: the relative dielectric constant of described dielectric-slab (1) is 4.4, and thickness is 1.5mm.
3. the ultra broadband dipole antenna of balance feed microstrip line according to claim 1 and 2, is characterized in that: the radius (R2) of the radius (R1) of the first semicircle oscillator (5) and the second semicircle oscillator (6) is 11mm.
4. the ultra broadband dipole antenna of balance feed microstrip line according to claim 3, it is characterized in that: the profile of paster on balance microstrip line (3) is right-angled trapezium, the upper base of right-angled trapezium is 70～75% with the ratio of going to the bottom, and the hypotenuse of paster on balance microstrip line (3) contacts with the first semicircle oscillator (5) with the acute angle portion forming of going to the bottom.
5. the ultra broadband dipole antenna of balance feed microstrip line according to claim 4, is characterized in that: the length of the upper base of right-angled trapezium (L1) is 12mm, and the length of go to the bottom (L2) of right-angled trapezium is 16.8mm, and the height of right-angled trapezium (H) is 1.4mm.
6. according to the ultra broadband dipole antenna of the balance feed microstrip line described in claim 1,2,4 or 5, it is characterized in that: the distance of center circle of the first semicircle oscillator (5) and the second semicircle oscillator (6) is 2.4mm from poor (D) of the diameter with the first semicircle oscillator (5).
7. the ultra broadband dipole antenna of balance feed microstrip line according to claim 6, is characterized in that: the length (L3) of paster under balance microstrip line (4) is 17.3mm, and the width (L4) of paster under balance microstrip line (4) is 1mm.
8. according to the ultra broadband dipole antenna of the balance feed microstrip line described in claim 1,2,4,5 or 7, it is characterized in that: the length (L5) of dielectric-slab (1) is 27.8mm, and the width (W) of dielectric-slab (1) is 24.4mm.
9. the ultra broadband dipole antenna of balance feed microstrip line according to claim 8, it is characterized in that: described dipole antenna is circuitron, on metal-loaded disk (2), balance microstrip line, under paster (3), balance microstrip line, paster (4), metallization via hole (1-1), the first semicircle oscillator (5) and the second semicircle oscillator (6) are all printed on dielectric-slab (1).
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| CN201210190699.3A CN102694253B (en) | 2012-06-11 | 2012-06-11 | Balance microstrip line feed ultra-wideband dipole antenna |
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| CN201210190699.3A CN102694253B (en) | 2012-06-11 | 2012-06-11 | Balance microstrip line feed ultra-wideband dipole antenna |
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| CN102694253B true CN102694253B (en) | 2014-02-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103178340A (en) * | 2013-03-04 | 2013-06-26 | 哈尔滨工业大学 | Balanced micro-strip line feeding printed V-shaped antenna with loading metal disc |
| CN107611593B (en) * | 2017-07-13 | 2023-09-29 | 佛山市顺德区中山大学研究院 | Multi-frequency broadband dipole antenna with coupling branches |
| CN114512792A (en) * | 2022-03-07 | 2022-05-17 | 成都九华圆通科技发展有限公司 | Miniature broadband conformal antenna |
| CN115548660B (en) * | 2022-09-27 | 2023-03-28 | 北京航空航天大学 | Broadband active antenna for electromagnetic environment monitoring |
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| CN1151621A (en) * | 1995-09-27 | 1997-06-11 | Ntt移动通信网株式会社 | Broadband antenna using semicircular radiator |
| WO2007032178A1 (en) * | 2005-09-14 | 2007-03-22 | Konica Minolta Holdings, Inc. | Antenna device |
| CN101297439A (en) * | 2005-11-01 | 2008-10-29 | 柯尼卡美能达控股株式会社 | Antenna device |
| CN201887151U (en) * | 2010-10-28 | 2011-06-29 | 南京理工大学 | Ultra-wideband planar monopole antenna |
| CN102171890A (en) * | 2008-10-17 | 2011-08-31 | 三菱电线工业株式会社 | Wideband antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7327318B2 (en) * | 2006-02-28 | 2008-02-05 | Mti Wireless Edge, Ltd. | Ultra wide band flat antenna |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151621A (en) * | 1995-09-27 | 1997-06-11 | Ntt移动通信网株式会社 | Broadband antenna using semicircular radiator |
| WO2007032178A1 (en) * | 2005-09-14 | 2007-03-22 | Konica Minolta Holdings, Inc. | Antenna device |
| CN101297439A (en) * | 2005-11-01 | 2008-10-29 | 柯尼卡美能达控股株式会社 | Antenna device |
| CN102171890A (en) * | 2008-10-17 | 2011-08-31 | 三菱电线工业株式会社 | Wideband antenna |
| CN201887151U (en) * | 2010-10-28 | 2011-06-29 | 南京理工大学 | Ultra-wideband planar monopole antenna |
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