CN102694252A - Ultra-wide band printed dipole antenna with combined semicircular sheet oscillators capable of realizing balanced microstrip line feeding - Google Patents
Ultra-wide band printed dipole antenna with combined semicircular sheet oscillators capable of realizing balanced microstrip line feeding Download PDFInfo
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- CN102694252A CN102694252A CN2012101900183A CN201210190018A CN102694252A CN 102694252 A CN102694252 A CN 102694252A CN 2012101900183 A CN2012101900183 A CN 2012101900183A CN 201210190018 A CN201210190018 A CN 201210190018A CN 102694252 A CN102694252 A CN 102694252A
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Abstract
The invention relates to an ultra-wide band printed dipole antenna, in particular to an ultra-wide band printed dipole antenna with combined semicircular sheet oscillators capable of realizing balanced microstrip line feeding. The ultra-wide band printed dipole antenna solves the problems of poor balanced feeding performance and poor directional pattern symmetry of the existing planarized, band-ultra-widened and miniaturized ultra-wide band antenna. A left oscillator and a right oscillator of combined semicircular symmetrical oscillators are symmetrically printed on the upper surface of a dielectric plate along the centerline of the dielectric plate. A balanced microstrip line upper patch is printed on the upper surface of the dielectric plate along the length direction of the centerline of the dielectric plate. A balanced microstrip line lower patch is printed on the lower surface of the dielectric plate along the length direction of the centerline of the dielectric plate. The lower end of the balanced microstrip line lower patch is in contact with the lower edge of the dielectric plate. A metallized via is connected with the upper end of the balanced microstrip line lower patch through a metal sheet. The ultra-wide band printed dipole antenna is used for receiving and transmitting radiation signals.
Description
Technical field
The present invention relates to ultra-wideband printed dipole antenna, be specifically related to the ultra-wideband printed dipole antenna of balance feed microstrip line combination halfround bar slice shape oscillator.
Background technology
Ultra broadband (Ultra-Wide Band, UWB) technology original form be impulse wireless communication, originate from the forties in 20th century, appear the nineties in 20th century from it and before, the UWB technology is used in communication equipments such as radar and low intercepting and capturing rate as military technology.In the research of the time-domain electromagnetics sixties in 20th century, super-broadband tech is used for intactly describing through impulse response the temporal properties of a certain type of microwave network.U.S. OSD/DARPA (The Defense Advanced Research Project Agency and the Office of the Secretary of Defense) proposes and through UWB Group approval, has at first defined " ultra broadband " notion.
In the overwhelming majority early stage research work, particularly impulse radio communication field of the relevant UWB technology of the U.S., all under U.S. government's plan of secret, support to accomplish.After 1994, privacy restriction is just removed gradually, thereby has accelerated this research on the one hand greatly.
On February 14th, 2002, the approval that super-broadband tech has obtained FCC is used for commercial communication.The implication of FCC definition ultra broadband is: the relative bandwidth of signal is more than or equal to 20%, and perhaps absolute bandwidth is greater than 500MHz.
Because super-broadband tech is to the requirement of bandwidth, the pulse signal on the time domain can satisfy this requirement.The frequency spectrum of clock has certain bandwidth usually, in application, usually can run into the general component information of estimating that pulse signal comprised, for example highest frequency component and frequency range.In theory, can obtain the frequency spectrum of signal through the FFT conversion, clock commonly used has Gaussian pulse, differential Gaussian pulse, raised cosine etc.
The UWB technology is widely used in fields such as broadband connections, spread spectrum communication, GPR, impulse radar, electromagnetic compatibilities.It mainly develops towards the direction of high-peak power, burst pulse and repetition rate; It has the bandwidth of GHz magnitude; And cause that emitted energy is quite little, therefore possibly under the situation that does not take present close-packed frequency resource, bring a kind of brand-new voice and data communication mode.
Antenna is the critical component that transmits and receives signal in the radio ultra wide band system; Extensive use along with super-broadband tech; Research to ultra-wideband antenna also becomes important day by day, and the design of ultra-wideband antenna also more and more receives 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 in the whole frequency scope of EMC, good reception and emitting performance to be arranged.
UWB is applicable at a high speed, in-plant unlimited personal communication, like the various application of current WLAN, is applicable to that also the digitized audio frequency and video of short distance infinitely link, and the short distance broadband high-speed does not have relevant civil areas such as access.Be worth explanation, the actual use spectral range of the indoor UWB communication of in the UWB technology, stipulating is 3.1～10.6GHz, and it is 3.42: 1 than the bandwidth ratio of low-limit frequency (highest frequency with); Stipulate simultaneously need have at least-the 500MHz bandwidth of 10dB greater than the UWB system of 2.5GHz centre frequency, and centre frequency is lower than the UWB system of 2.5GHz, relative bandwidth should reach 20% at least.
Along with the proposition of ultra-wideband communications mode, all channel antenna that works in 3.1～106GHz emerges in an endless stream, and mainly the various evolving forms with biconical antenna are 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.
Existing ultra broadband linear polarized antenna comprises Sinuous Antenna, line awl antenna and butterfly wire antenna and some special-shaped oscillator unipole antennas; Above-mentioned wire antenna all has broadband character; But existing ultra broadband wire antenna exists, and the broadband index is low, the feed balance is poor, omni-directional directional diagram bandwidth is low and size is bigger, can not be applicable to fields such as electromagnetic environment monitor, special measurement equipment.
Summary of the invention
The present invention is complanation, ultra broadbandization and miniaturization balanced feeding and the relatively poor problem of directional diagram symmetry of the existing ultra-wideband antenna of solution, and then proposes the ultra-wideband printed dipole antenna of balance feed microstrip line combination halfround bar slice shape oscillator.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes dielectric-slab, the semicircle symmetrical dipole of combination left side oscillator, make up paster on paster under semicircle symmetrical dipole right side oscillator, sheet metal, the balance microstrip line, metallize via hole and the balance microstrip line; Making up semicircle symmetrical dipole left side oscillator is printed on the upper surface of dielectric-slab with the center line symmetry of the semicircle symmetrical dipole of combination right side oscillator along dielectric-slab; And make up straight flange and the middle line parallel of semicircle symmetrical dipole left side oscillator and away from center line; Paster is printed on the upper surface of dielectric-slab along the length direction of dielectric-slab center line on the balance microstrip line; And the lower end of paster contacts with the lower limb of dielectric-slab on the balance microstrip line; Paster is printed on the lower surface of dielectric-slab along the length direction of dielectric-slab center line under the balance microstrip line; And the lower end of paster contacts with the lower limb of dielectric-slab under the balance microstrip line, and the metallization via hole is connected through the upper end of paster under sheet metal and the balance microstrip line.
The invention has the beneficial effects as follows: the present invention is planographic type antenna, and size is little, compact conformation; Can be integrated on the circuit board of portable terminal, greatly realize the miniaturization of antenna, feed form of the present invention is the balance feed microstrip line; Area occupied is merely 1.5% of antenna area, has good miniaturization effect, simultaneously; This balance feed microstrip line form goes for traditional feeder line feeds such as coaxial line, also goes for modern integrated transmission-line feed; So, applied widely, both can use coaxial feeding, also can be integrated with printed circuit board (PCB).Antenna radiator proposed by the invention is the symmetrical dipole structure, and directional diagram has symmetry.
Description of drawings
Fig. 1 is a surface structure sketch map of the present invention, and Fig. 2 is a lower surface configuration sketch map of the present invention, and Fig. 3 is the vertical view of Fig. 1; Fig. 4 is an antenna antiradiation coefficient test result of the present invention, the E face directional diagram experimental result of antenna when Fig. 5 is 2.5GHz, and measured is the test result curve among the figure; Simulated is the simulation result curve; The H face directional diagram experimental result of antenna when Fig. 6 is 2.5GHz, measured is the test result curve among the figure, simulated is the simulation result curve.
Embodiment
Embodiment one: combine Fig. 1 that this execution mode is described; The ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode comprises dielectric-slab 1, the semicircle symmetrical dipole of combination left side oscillator 2, makes up paster 7 on paster 5 under semicircle symmetrical dipole right side oscillator 3, sheet metal 4, the balance microstrip line, metallize via hole 6 and the balance microstrip line; Making up semicircle symmetrical dipole left side oscillator 2 is printed on the upper surface of dielectric-slab 1 with the center line symmetry of the semicircle symmetrical dipole of combination right side oscillator 3 along dielectric-slab 1; And make up straight flange and the middle line parallel of semicircle symmetrical dipole left side oscillator 2 and away from center line; Paster 7 is printed on the upper surface of dielectric-slab 1 along the length direction of dielectric-slab 1 center line on the balance microstrip line; And the lower end of paster 7 contacts with the lower limb of dielectric-slab 1 on the balance microstrip line; Paster 5 is printed on the lower surface of dielectric-slab 1 along the length direction of dielectric-slab 1 center line under the balance microstrip line; And the lower end of paster 5 contacts with the lower limb of dielectric-slab 1 under the balance microstrip line, and metallization via hole 6 is connected through the upper end of paster 5 under sheet metal 4 and the balance microstrip line.
The semicircle symmetrical dipole of combination left side oscillator 2 and the semicircle symmetrical dipole of combination right side oscillator 3 have constituted the radiant body part of antenna in this execution mode; Under the balance microstrip line on paster 5 and the balance microstrip line paster 7 constituted the microstrip-fed line part of balance; Make up the reflection of electromagnetic wave that sudden change that semicircle symmetrical dipole left side oscillator 2 and the semicircle symmetrical dipole of combination right side oscillator 3 reduced structure partly causes; Widen the antenna impedance bandwidth, thereby reached the ultra broadband characteristic.
Embodiment two: combine Fig. 1 and Fig. 2 that this execution mode is described; The length L s of the dielectric-slab 1 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode is 46mm; The width Ws of dielectric-slab 1 is 36.2mm; The thickness Hs of dielectric-slab 1 is 1.5mm, and dielectric-slab 1 is that the refractory material grade is the refractory material making of FR-4.
FR-4 is a kind of code name of refractory material grade in this execution mode, and the meaning of representative is a resin material must can be from a kind of material specification of horizontal blanking through fired state, and it is not a kind of title material, but a kind of material rate.
Other composition and annexation are identical with embodiment one.
Embodiment three: combine Fig. 1 that this execution mode is described; The semicircle symmetrical dipole of the combination left side oscillator 2 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode is made up of the first halfround bar slice 2-1, the second halfround bar slice 2-2 and the 3rd halfround bar slice 2-3; The 3rd halfround bar slice 2-3, the second halfround bar slice 2-2, the first halfround bar slice 2-1 along continuous straight runs overlap from left to right successively, and the radius of the first halfround bar slice 2-1 is R
1, the radius of the second halfround bar slice 2-2 is R
2, the radius of the 3rd halfround bar slice 2-3 is R
3, and R
1: R
2: R
3=4: 2: 1.Other composition and annexation are identical with embodiment one.
Embodiment four: combine Fig. 1 that this execution mode is described, the radius R of the first halfround bar slice 2-1 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode
1=14mm, the radius R of the second halfround bar slice 2-2
2=7mm, the radius R of the 3rd halfround bar slice 2-3
3=3.5mm.Other composition and annexation are identical with embodiment three.
Embodiment five: combine Fig. 1 that this execution mode is described; The semicircle symmetrical dipole of the combination right side oscillator 3 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode is made up of the 4th halfround bar slice 3-1, the 5th halfround bar slice 3-2 and the 6th halfround bar slice 3-3; The 4th halfround bar slice 3-1, the 5th halfround bar slice 3-2, the 6th halfround bar slice 3-3 along continuous straight runs overlap from left to right successively, and the radius of the 4th halfround bar slice 3-1 is R
4, the radius of the 5th halfround bar slice 3-2 is R
5, the radius of the 6th halfround bar slice 3-3 is R
6, and R
4: R
5: R
6=4: 2: 1.Other composition and annexation are identical with embodiment one.
Embodiment six: combine Fig. 1 that this execution mode is described, the radius R of the 4th halfround bar slice 3-1 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode
4=14mm, the radius R of the 5th halfround bar slice 3-2
5=7mm, the radius R of the 6th halfround bar slice 5-3
6=3.5mm.Other composition and annexation are identical with embodiment five.
Embodiment seven: combine Fig. 2 that this execution mode is described, the long edge lengths L of paster (5) under the balance microstrip line of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode
5Be 22.55mm, the bond length L of paster 5 under the balance microstrip line
6Be 8mm, the first balance micro belt line width Wf of paster 5 under the balance microstrip line
1Be 1.1mm.Its other composition and annexation are identical with embodiment one.
Embodiment eight: combine Fig. 1 that this execution mode is described, the long edge lengths L of paster 7 on the balance microstrip line of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode
2Be 22.55mm, the bond length L of balance microstrip line upper body paster 7
1Be 12mm, the second balance micro belt line width Wf of paster 7 on the balance microstrip line
2Be 1.1mm.Other composition and annexation are identical with embodiment one.
Embodiment nine: combine Fig. 1 that this execution mode is described, the length L of the sheet metal 4 of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode
3Be 2.6mm, the distance L between sheet metal 4 bases and dielectric-slab 1 base
4Be 21.45mm.Other composition and annexation are identical with embodiment one.
Embodiment ten: combine Fig. 1 that this execution mode is described, distance L between the semicircle symmetrical dipole left side oscillator 2 of combination of the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of this execution mode and the semicircle symmetrical dipole of the combination right side oscillator 3
7Be 1.6mm.Other composition and annexation are identical with embodiment one, two, three, four, five, six, seven, eight or nine.
Operation principle
The semicircle symmetrical dipole of combination of the present invention left side oscillator 2 is the radiant body of antenna with the semicircle symmetrical dipole of combination right side oscillator 3, and the electric current of metal irradiator surface mainly is distributed in the edge of sheet metal 4, and the electric current at edge is main to the contribution of radiant body.Printed dipole antennas of the present invention can form omnidirectional radiation; Because the radiation meeting of standing wave electric current forms two main lobes at its E face; Its direction is symmetrical set with the semicircle symmetrical dipole of combination right side oscillator 3 through making up semicircle symmetrical dipole left side oscillator 2 perpendicular to the flow direction of electric current, makes the field stack of the main lobe of two standing wave electric currents; Forming one is the directional diagram of 8 fonts at antenna E face, thereby realizes the omnidirectional radiation of antenna.
Can find out from the test result of Fig. 4; Antenna is lower than-10dB at the frequency band internal reflection coefficient of 2.8-20GHz; Than bandwidth is 7.1: 1, has covered whole C/X/Ku wave band, and part has covered S and K wave band; Reach the index of ultra-wideband antenna, also arrived the requirement of the covering 3.1-10.6GHz of FCC (US Federal Communication Committee) regulation.
Can find out from the test result of Fig. 5 and Fig. 6; Antenna E face directional diagram when 2.5GHz presents 8 words; H face directional diagram presents sub-circular; Be the directional diagram of typical omnidirectional antenna, the problem that dielectric material exists during with test the influence of anchor clamps can make secondary lobe and the simulation result of antenna pattern there is some difference, transmit and receive so antenna of the present invention can be used for omnibearing electromagnetic wave.
Claims (10)
1. the balance feed microstrip line makes up the ultra-wideband printed dipole antenna of halfround bar slice shape oscillator; It is characterized in that: the ultra-wideband printed dipole antenna of said balance feed microstrip line combination halfround bar slice shape oscillator structure comprises dielectric-slab (1), the semicircle symmetrical dipole of combination left side oscillator (2), makes up paster (7) on paster (5) under semicircle symmetrical dipole right side oscillator (3), sheet metal (4), the balance microstrip line, metallization via hole (6) and the balance microstrip line; Making up half shape symmetrical dipole left side oscillator (2) is printed on the upper surface of dielectric-slab (1) with the center line symmetry of combination semicircle symmetrical dipole right side oscillator (3) along dielectric-slab (1); And make up straight flange and the middle line parallel of semicircle symmetrical dipole left side oscillator (2) and away from center line; Paster on the balance microstrip line (7) is printed on the upper surface of dielectric-slab (1) along the length direction of dielectric-slab (1) center line; And the lower end of paster on the balance microstrip line (7) contacts with the lower limb of dielectric-slab (1); Paster under the balance microstrip line (5) is printed on the lower surface of dielectric-slab (1) along the length direction of dielectric-slab (1) center line; And the lower end of paster under the balance microstrip line (5) contacts with the lower limb of dielectric-slab (1), and metallization via hole (6) is connected through the upper end of paster (5) under sheet metal (4) and the balance microstrip line.
2. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1; It is characterized in that: the length (Ls) of dielectric-slab (1) is 46mm; The width (Ws) of dielectric-slab (1) is 36.2mm; The thickness (Hs) of dielectric-slab (1) is 1.5mm, and dielectric-slab (1) is that the refractory material grade is the refractory material making of FR-4.
3. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1; It is characterized in that: make up semicircle symmetrical dipole left side oscillator (2) and form by first halfround bar slice (2-1), second halfround bar slice (2-2) and the 3rd halfround bar slice (2-3); The 3rd halfround bar slice (2-3), second halfround bar slice (2-2), first halfround bar slice (2-1) along continuous straight runs overlap from left to right successively, and the radius of first halfround bar slice (2-1) is R
1, the radius of second halfround bar slice (2-2) is R
2, the radius of the 3rd halfround bar slice (2-3) is R
3, and R
1: R
2: R
3=4: 2: 1.
4. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 3, it is characterized in that: the radius R of first halfround bar slice (2-1)
1=14mm, the radius R of second halfround bar slice (2-2)
2=7mm, the radius R of the 3rd halfround bar slice (2-3)
3=3.5mm.
5. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1; It is characterized in that: make up semicircle symmetrical dipole right side oscillator (3) and form by the 4th halfround bar slice (3-1), the 5th halfround bar slice (3-2) and the 6th halfround bar slice (3-3); The 4th halfround bar slice (3-1), the 5th halfround bar slice (3-2), the 6th halfround bar slice (3-3) along continuous straight runs overlap from left to right successively, and the radius of the 4th halfround bar slice (3-1) is R
4, the radius of the 5th halfround bar slice (3-2) is R
5, the radius of the 6th halfround bar slice (3-3) is R
6, and R
4: R
5: R
6=4: 2: 1.
6. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 5, it is characterized in that: the radius R of the 4th halfround bar slice (3-1)
4=14mm, the radius R of the 5th halfround bar slice (3-2)
5=7mm, the radius R of the 6th halfround bar slice (5-3)
6=3.5mm.
7. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1, it is characterized in that: the long edge lengths (L of paster under the balance microstrip line (5)
5) be 22.55mm, the bond length (L of paster under the balance microstrip line (5)
6) be 8mm, the first balance micro belt line width (Wf of paster under the balance microstrip line (5)
1) be 1.1mm.
8. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1, it is characterized in that: the long edge lengths (L of paster on the balance microstrip line (7)
2) be 22.55mm, the bond length (L of balance microstrip line upper body paster (7)
1) be 12mm, the second balance micro belt line width (Wf of paster on the balance microstrip line (7)
2) be 1.1mm.
9. according to the ultra-wideband printed dipole antenna of the said balance feed microstrip line combination halfround bar slice shape oscillator of claim 1, it is characterized in that: the length (L of sheet metal (4)
3) be 2.6mm, the distance (L between sheet metal (4) base and dielectric-slab (1) base
4) be 21.45mm.
10. according to claim 1,2,3,4,5,6,7, the ultra-wideband printed dipole antenna of 8 or 9 said balance feed microstrip line combination halfround bar slice shape oscillators, it is characterized in that: make up distance (L between semicircle symmetrical dipole left side oscillator (2) and the combination semicircle symmetrical dipole right side oscillator (3)
7) be 1.6mm.
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|---|---|---|---|
| CN2012101900183A CN102694252A (en) | 2012-06-11 | 2012-06-11 | Ultra-wide band printed dipole antenna with combined semicircular sheet oscillators capable of realizing balanced microstrip line feeding |
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|---|---|---|---|
| CN2012101900183A CN102694252A (en) | 2012-06-11 | 2012-06-11 | Ultra-wide band printed dipole antenna with combined semicircular sheet oscillators capable of realizing balanced microstrip line feeding |
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Cited By (1)
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| CN103401076A (en) * | 2013-08-16 | 2013-11-20 | 厦门大学 | Double feed and double polarization microstrip antenna |
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| US20110291836A1 (en) * | 2010-05-27 | 2011-12-01 | Deavours Daniel D | Microstrip antenna for rfid device |
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| CN103401076A (en) * | 2013-08-16 | 2013-11-20 | 厦门大学 | Double feed and double polarization microstrip antenna |
| CN103401076B (en) * | 2013-08-16 | 2015-02-04 | 厦门大学 | Double feed and double polarization microstrip antenna |
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Application publication date: 20120926 |