CN108598673A - Ultra wide band horizontally polarized omnidirectional antenna and construction method - Google Patents
Ultra wide band horizontally polarized omnidirectional antenna and construction method Download PDFInfo
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- CN108598673A CN108598673A CN201810191680.8A CN201810191680A CN108598673A CN 108598673 A CN108598673 A CN 108598673A CN 201810191680 A CN201810191680 A CN 201810191680A CN 108598673 A CN108598673 A CN 108598673A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Ultra wide band horizontally polarized omnidirectional antenna and construction method, include the following steps：Step 1, establishes rectangular coordinate system in space, and step 2 constructs the upper arm of Alford rings；Step 3 constructs the underarm of Alford rings；Step 4, central coaxial feed.Oscillator is arc-shaped, quantity at least three；About 180 ° of each oscillator radian, two-conductor feed, each pair of oscillator are non-coplanar；Center notice is fed, and obtains relatively printing form better performance：Bandwidth is wider, reaches 62%, 20% or more broadening；Gain is higher, reaches 2.5 ~ 4.8dBi, improves 1 ~ 2dB；It is more efficient, improve 10% or more；Power capacity increases, and at least increases 100%；Five, cost reduction at least reduces 50%.This method also has the characteristics that thinking novelty, clear principle, method is pervasive, realization is simple, easily batch production, it is the preferred embodiment of inexpensive Alford loop antennas, and design for high-gain horizontal polarized omnidirectional array antenna, multifrequency horizontally polarized omnidirectional antenna and H/V dual-polarization omnidirectional antennas and to improve be also to be applicable in and effective.
Description
Technical field
The present invention relates to a kind of radio antenna equipment and technologies, more particularly to ultra wide band horizontally polarized omnidirectional antenna
And construction method.
Background technology
Omnidirectional antenna is a kind of important antenna type in wireless communication field.For a long time, the omnidirectional antennas of people's invention
Line is mostly vertical polarization, and the design of horizontally polarized omnidirectional antenna is then much more difficult.But horizontally polarized omnidirectional antenna application needs
Sample of seeking common ground is very strong and extensive, and H/V quadrature dualpolarizeds omnidirectional mimo antenna is such as formed with vertical depolarized omnidirectional antenna, to improve
The capacity of communication system.So far, the horizontal polarization horizontal omnidirectional antenna invented almost is all based on loop antenna theory, i.e.,
Electric small loop antenna and TV university Alford loop antennas.The former is the horizontally polarized omnidirectional antenna invented earliest, but since Zhou Changyuan is small
In wavelength, the electric current same phase of constant amplitude everywhere, its gain is very low, smaller bandwidth, poor efficiency, makes frequently as Active Receiving Antenna
With；The latter is then to be arranged in multiple horizontal half-wave dipoles on one piece of medium substrate by circular manner, broader bandwidth, omni-directional
Good, gain and efficiency is higher, section is very low, but overall dimensions are larger, feeding network design is complicated, cost is higher.Except above-mentioned side
Outside case, it can also be realized by log-periodic antenna group battle array mode, major programme has：（1）By several log-periodic antennas
（LPDA）Short end is placed vertically upward, is equally arranged in a circumference to realize ultra wide band horizontally polarized omnidirectional antenna.This side
The height of case and a diameter of several wavelength magnitudes, it is clearly not applicable to require stringent scene for size；（2）It is right by several
One number time, antenna short end was opposite inwardly, coplanar to line up round battle array.This scheme same size is big, directional diagram is poor, gain is low, matching is tired
It is difficult.In addition, also some other technical solution, also all haves the shortcomings that size is big, directional diagram is poor.In conclusion high-performance is wide
It is key equipment and technical bottleneck in wireless communication with horizontal polarization horizontal omnidirectional antenna.In the background of engineer application demand
Under, it will be important subject in field of antenna always.
Invention content
In order to solve the above technical problems, a kind of ultra wide band horizontally polarized omnidirectional antenna of present invention offer and construction method,
With low cost, ultrabroad band, omni-directional, horizontal polarization, higher gain, high efficiency and high power and low section, structure letter
The advantages of single, suitable volume production.
To realize the above-mentioned technical purpose, used technical solution is：Ultra wide band horizontally polarized omnidirectional antenna, including
Alford rings upper arm, Alford rings underarm and feed cable；
The Alford ring upper arm are equipped with linear upper conductor feeder line, are respectively equipped with from the center of upper conductor feeder line to both sides
Quantity is equal, from short to long, from least three circular arc oscillators down to height arrangement, the radian of circular arc oscillator is π/4, is led upper
Body feeder line side rotation direction interlock oppositely arranged all circular arc oscillators using the center of upper conductor feeder line as the center of circle rotate 180 ° after, with
The circular arc oscillator of the upper conductor feeder line other side is completely superposed；
The Alford ring underarms are arranged in the lower section of Alford ring upper arm, are equipped with linear lower conductor feeder line, are led from down
The center of body feeder line to both sides be respectively equipped with it is equal from short to long positioned at quantity, shake from least three circular arcs of high to low arrangement
Son, the radian of circular arc oscillator are π/4, and it is symmetry axis on Alford rings that Alford ring underarms, which are using the axis of upper conductor feeder line,
The complete mirror image of arm；
The internal and external conductor of the feed cable point is connected with upper conductor feeder line and lower conductor feeder line.
Further, the top surface of upper conductor feeder line and the middle section of bottom end are plane, top surface middle section
Plane length is less than the plane length of bottom surface middle section, and top and bottom are from center toward the gradual squint upward of two side directions.
Further, the width of the circular arc oscillator and arc length ratio about 0.05 ~ 0.15, the radius of most interior circular arc oscillator
For（0.15~0.20）×λ L , the radius of outermost circular arc oscillator is（0.80~1.0）×λ L , whereinλ L For lowest operating frequency.
Further, it is air or filled media layer between the Alford rings upper arm and Alford ring underarms.
Further, the Alford rings upper arm or Alford ring underarms are integrally formed.
Further, the Alford rings upper arm or Alford rings are made using good metallic conductor.
The construction method of ultra wide band horizontally polarized omnidirectional antenna, includes the following steps：
Step 1 establishes rectangular coordinate system in space；
Step 2 constructs the upper arm of Alford rings：In XOY plane, with coordinate originOFor the center of circle, make at least three radiuses respectively
Not equal, radian is the circular arc oscillator of π/4, and the initial angle of circular arc oscillator is identical, rotation direction is staggeredly reversed, arranges from down to height, to sit
Mark originOCentered on above-described at least three circular arc oscillators are replicated after, the circular arc oscillator of duplication is rotated 180 ° together,
Three pairs of rotational symmetry, initiating terminal are constituted in the arc section of same diameter, one is placed on the initiating terminal line of all circular arc oscillators
Root upper conductor feeder line is linked together with three pairs of arc sections, constitutes the upper arm of Alford rings, the top surface of upper conductor feeder line and bottom end
Middle section is plane, and the middle section plane length of top surface is less than the middle section plane length of bottom surface, top and bottom
From center toward the gradual squint upward of two side directions；
Step 3 constructs the underarm of Alford rings, by the Alford rings upper arm of step 2 using upper conductor feeder line axis as symmetry axis,
Image copying is carried out to Alford ring upper arm, then its mirrored portion is removed into a distance downwards, forms Alford rings
Underarm；
Step 4, at the symmetrical centre of the two-arm up and down of the Alford rings of step 3, by a feed cable internal and external conductor point
It is not connected with upper conductor feeder line and lower conductor feeder line.
Present invention has the advantages that：
The present invention has abandoned the higher printing form of common cost using TV university Alford loop antennas as physical prototype, and will be situated between
Matter substrate becomes air layer, then by horizontal circular arc oscillator and twin lead integral forming.By optimizing the several of oscillator and feeder line
What parameter, the present invention realize Alford loop antenna ultra wide bandwidths（1.20-2.30GHz, VSWR≤2.0, BW=1.1GHz,
62.86%）, broadening 20% or more；Higher gain（G=2.5-4.8dBi）, improve 1 ~ 2dB；Preferable horizontal omnidirectional（It is non-round
Degree<15dB）, high efficiency（η A ≥88%）, high power capacity, and simple feed design, smaller diameter（≈1.12×λ L ,λ L For lowest operating frequency）With lower section（≈0.21×λ L ）；Power capacity increases, and at least increases 100%；Cost reduction,
50% is at least reduced, diameter dimension is increased to about 1λ L , in addition, this method also have thinking novelty, clear principle, method it is pervasive,
Realize simple, low cost, it is suitable for mass production the features such as, be broadband, low cost, high power levels polarization omnidirectional optional side
Case.Moreover, for high-gain horizontal polarized omnidirectional array antenna, multiband horizontally polarized omnidirectional antenna and H/V bipolar omni-directionals
The design and improvement of antenna are also applicable and effective.
Description of the drawings
Fig. 1 is the schematic diagram that rectangular coordinate system defines used by antenna model.
Fig. 2 is the upper arm model vertical view of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 3 is the underarm model vertical view of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 4 is the front view of the parallel two-conductor feeder line model of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 5 is the vertical view of the parallel two-conductor feeder line model of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 6 is the vertical view of the full geometry model of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 7 is the front view of the full geometry model of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 8 is the explosive view of the full geometry model of ultra wide band horizontally polarized omnidirectional antenna.
Fig. 9 is the input impedance of ultra wide band horizontally polarized omnidirectional antennaZ in Curve.
Figure 10 is the reflectance factor of ultra wide band horizontally polarized omnidirectional antenna |S 11 | curve.
Figure 11 is the standing-wave ratio VSWR curves of ultra wide band horizontally polarized omnidirectional antenna.
Figure 12 is ultra wide band horizontally polarized omnidirectional antennaf 1 The 2D gain patterns of=1.20GHz frequency points.
Figure 13 is ultra wide band horizontally polarized omnidirectional antennaf 2 The 2D gain patterns of=1.55GHz frequency points.
Figure 14 is ultra wide band horizontally polarized omnidirectional antennaf 3 The 2D gain patterns of=1.95GHz frequency points.
Figure 15 is ultra wide band horizontally polarized omnidirectional antennaf 4 The 2D gain patterns of=2.30GHz frequency points.
Figure 16 is the maximum gain of ultra wide band horizontally polarized omnidirectional antenna with frequencyfVariation characteristic.
Figure 17 is the efficiency of ultra wide band horizontally polarized omnidirectional antennaη A With frequencyfChange curve.
Specific implementation mode
The preferred embodiment for providing invention below in conjunction with the accompanying drawings, with the technical solution that the present invention will be described in detail.Here, it will give
Going out respective drawings, the present invention is described in detail.It should be strongly noted that preferred implementation example as described herein is only used
In the description and interpretation present invention, the present invention is not limited to or limited.
Purpose of the present invention is to provide a kind of low cost, ultrabroad band, omni-directional, horizontal polarization, higher increasing for wireless communication
Benefit, high efficiency and high power and low section, horizontally polarized omnidirectional antenna simple in structure, being suitble to volume production, and be high-gain water
Horizontally polarized omnidirectional array antenna, the design of multiband horizontally polarized omnidirectional antenna and H/V dual-polarization omnidirectional antennas and improvement provide
Beneficial reference method.
Ultra wide band horizontally polarized omnidirectional antenna, including Alford rings upper arm, Alford rings underarm and feed cable；
The Alford ring upper arm are equipped with linear upper conductor feeder line, are respectively equipped with from the center of upper conductor feeder line to both sides
Quantity is equal, from short to long, from least three circular arc oscillators down to height arrangement, the radian of circular arc oscillator is π/4, is led upper
Body feeder line side rotation direction interlock oppositely arranged all circular arc oscillators using the center of upper conductor feeder line as the center of circle rotate 180 ° after, with
The circular arc oscillator of the upper conductor feeder line other side is completely superposed.
The Alford ring underarms are arranged in the lower section of Alford ring upper arm, are equipped with linear lower conductor feeder line, from
The center of lower conductor feeder line to both sides are respectively equipped at least three circular arcs equal from short to long positioned at quantity, from high to low arrangement
Oscillator, the radian of circular arc oscillator are π/4, and it is symmetry axis to Alford rings that Alford ring underarms, which are using the axis of upper conductor feeder line,
The complete mirror image of upper arm.
The top surface of upper conductor feeder line and the middle section of bottom end are plane, and the plane length of top surface middle section is less than bottom
The plane length of face middle section, top and bottom from center toward the gradual squint upward of two side directions, lower conductor feeder line with above lead
The full symmetric setting of body feeder line, upper conductor feeder line also can be used the forms such as cylinder, rectangle with lower conductor feeder line and led as double
Body is fed, and is fed using two-conductor shown in figure, has better matching effect.
By taking three circular arc oscillators as an example, the middle section of two-conductor feeder line is parallel, and toward both sides, two conductors are gradually outwardly up and down
It opens；Each pair of circular arc oscillator is separately distributed in one plane, according to short long sequence outside inside, from the intermediate lower of feeder line
Eminence toward both sides arranges, and stepped arrangement, i.e. Z-direction are staggered.The end face center of upper conductor feeder line is upper conductor
Feeder line top surface plane 421, bottom center are upper conductor feeder line soffit plane, and the length of upper conductor feeder line soffit plane is more than upper
Conductor feeder line top surface plane 421 is tilted from upper conductor feeder line top surface plane 421 to two side directions upwards, which is upper
Conductor feeder line top surface inclined-plane 411, tilts upwards from upper conductor feeder line soffit plane to two side directions, which is upper conductor
Feeder line bottom surface inclined-plane 401, in the side of upper conductor feeder line integrally formed with three circular arc oscillators 101,201,301, three circular arcs
101,201,301 rotation direction of oscillator is interlocked oppositely arranged on upper conductor feeder line, and the radian of three circular arc oscillators 101,201,301 is equal
For π/4, gradually increase from circular arc oscillator 301 to the radius of circular arc oscillator 101, radius is respectively from inside to outside（0.15~0.20）
×λ L 、（0.45~0.60）×λ L 、、（0.80~1.0）×λ L ；Every arm lengths of circular arc oscillator are about（0.20~0.25）× e, width
With arc length ratio about 0.05 ~ 0.15.The other side of upper conductor feeder line is integrally formed with three circular arc oscillators 111,211,311, and three
After circular arc oscillator 111,211,311 rotates 180 ° using the center of upper conductor feeder line as the center of circle, with circular arc oscillator 101,201,301
It is completely superposed.
And the end face center of lower conductor feeder line be lower conductor feeder line top surface plane, the size of lower conductor feeder line top surface plane with
Upper conductor feeder line soffit plane is identical, and the bottom center of lower conductor feeder line is lower conductor feeder line soffit plane 422, lower conductor feeder line
Soffit plane 422 is identical as upper conductor feeder line top surface plane 421, dips down from lower conductor feeder line top surface plane to two side directions
Tiltedly, which is lower conductor feeder line top surface inclined-plane 402, lower conductor feeder line top surface inclined-plane 402 and upper conductor feeder line bottom
Inclined-plane 401 size shape in face is identical, is tilted down from lower conductor feeder line soffit plane to two side directions, which is
Lower conductor feeder line bottom surface inclined-plane 412, lower conductor feeder line bottom surface inclined-plane 412 and 411 size shape phase of upper conductor feeder line top surface inclined-plane
Together.
The internal and external conductor of the feed cable point is connected with upper conductor feeder line and lower conductor feeder line, is led under in upper conductor feeder line
The center symmetric setting central symmetry mouth 500 of body feeder line, the inner wire of feed cable is after lower conductor feeder line central symmetry mouth
It is connected with upper conductor feeder line, the outer conductor of feed cable is connected with lower conductor feeder line.
The width and arc length ratio about 0.05 ~ 0.15, the radius of most interior circular arc oscillator of all circular arc oscillators be（0.15~
0.20）×λ L , the radius of outermost circular arc oscillator is（0.80~1.0）×λ L , whereinλ L For lowest operating frequency, with six circles
For arc oscillator, from center to the three of both sides circular arc oscillators with 180 ° of center rotational symmetry, three circular arc oscillators of both sides are certainly
It is interior to be respectively to outer radius（0.15~0.20）×λ L 、（0.45~0.60）×λ L 、、（0.80~1.0）×λ L ；Every arm of circular arc oscillator
Length is about（0.20~0.25）× e, width and arc length ratio about 0.05 ~ 0.15.When more than three, most interior circular arc oscillator
Determine that other circular arc oscillators are located between two radiuses, between adjacent circular arc oscillator with the radius of outermost circular arc oscillator
Spacing etc..
It is air or filled media layer between Alford rings upper arm and Alford ring underarms, to support two-arm or reduce ring
Size.
Alford rings upper arm or Alford ring underarms are integrally formed, and radiator is circular arc symmetrical dipole, and feeder line is double leads
Body transmission line, oscillator is integrated with feeder line to be shaped..
Alford rings upper arm or Alford rings use the conventional hardware such as cutting, drilling, die casting using good metallic conductor
Technique processing and fabricating forms.
The construction method of ultra wide band horizontally polarized omnidirectional antenna, includes the following steps：
Step 1, as shown in Figure 1, establishing rectangular coordinate system in space；
Step 2 constructs the upper arm of Alford rings：In XOY plane, with coordinate originOFor the center of circle, make at least three radiuses respectively
Not equal, radian is the circular arc oscillator of π/4, and the initial angle of circular arc oscillator is identical, and rotation direction is staggeredly reversed, is arranged from down to height, such as Fig. 6
It is shown, i.e., it is in XOY plane staggeredly, oppositely oriented, as shown in fig. 7, staggeredly step arrangement is split into ZOY planes, with coordinate
OriginOCentered on above-described at least three circular arc oscillators are replicated after, the circular arc oscillator of duplication is rotated 180 ° together, structure
At three pairs of rotational symmetry, initiating terminal in the arc section of same diameter, one is placed on the initiating terminal line of all circular arc oscillators
Upper conductor feeder line is linked together with three pairs of arc sections, constitute Alford rings upper arm, as Fig. 2 circular arc oscillator 101,201,
301, circular arc oscillator 111,211,311 and upper conductor feeder line each section；
Step 3 constructs the underarm of Alford rings, by the Alford rings upper arm of step 2 using upper conductor feeder line axis as symmetry axis,
Image copying is carried out to Alford ring upper arm, then its mirrored portion is removed into a distance downwards, forms Alford rings
Underarm, circular arc oscillator 112,212,312 as shown in Figure 3, circular arc oscillator 102,202,302 and lower conductor feeder line each section；
Step 4 will be in a 50 Ω coaxial feeder cables at the symmetrical centre of the two-arm up and down of the Alford rings of step 3
Outer conductor is connected with upper conductor feeder line and lower conductor feeder line respectively, outside feed cable inner wire 601 shown in Fig. 4, feed cable
Conductor 602.
The day of final molding is as shown in Figure 5-Figure 8 by force, and 1）Oscillator is arc-shaped, quantity at least three；2）Each oscillator radian is about
180 °, about 1 wavelength of radius of longest oscillator；3）Two-conductor is fed, and two conductor intermediate parallels, both ends are turned into oblique angle；4）It is each right
Oscillator is non-coplanar；5）Center notice is fed, and obtains relatively printing form better performance：One, bandwidth is wider, reaches 62%, broadening
20% or more；Two, gain is higher, reaches 2.5 ~ 4.8dBi, improves 1 ~ 2dB；Three, more efficient（η A ≥88%）, improve 10% with
On；Four, power capacity increases, and at least increases 100%；Five, cost reduction at least reduces 50%.However, diameter dimension is increased to about
1⋅λ c , out-of-roundness variation, cross polarization XPD is deteriorated, but can be improved by increasing array number.
This method also has the characteristics that thinking novelty, clear principle, method is pervasive, realization is simple, easily batch production, is low
The preferred embodiment of cost Alford loop antennas, and it is complete for high-gain horizontal polarized omnidirectional array antenna, multifrequency horizontal polarization
Design and improvement to antenna and H/V dual-polarization omnidirectional antennas are also applicable and effective.
Fig. 9 is the input impedance of ultra wide band horizontally polarized omnidirectional antennaZ in Curve.Wherein, horizontal axis（X-axis）It is frequencyf, single
Position is GHz；The longitudinal axis（Y-axis）It is impedanceZ in , unit Ω;Solid line indicates real partR in , dotted line expression imaginary partX in .Known by figure,
In 1.20 ~ 2.30GHz frequency bands, real and imaginary parts variation range is respectively：+ 28 ~+52 Ω and -8 ~+30 Ω have apparent super
Broadband impedance characteristic.
Figure 10 is the reflectance factor of ultra wide band horizontally polarized omnidirectional antenna |S 11 | curve.Wherein, horizontal axis（X-axis）It is frequencyf,
Unit is GHz；The longitudinal axis（Y-axis）It isS 11 Amplitude |S 11 |, unit dB.Known by figure, antenna realizes ultra wide band work（1.20~
2.30GHz, BW=1.1GHz, 62.86%, |S 11 |≤-10 dB）.
Figure 11 is the standing-wave ratio VSWR curves of ultra wide band horizontally polarized omnidirectional antenna.Wherein, horizontal axis（X-axis）It is frequencyf, single
Position is GHz；The longitudinal axis（Y-axis）It is VSWR.Known by figure, antenna realizes ultra wide band work（1.20~2.30GHz, BW=1.1GHz,
62.86%, VSWR≤2.0）.
Figure 12 is ultra wide band horizontally polarized omnidirectional antennaf 1 The 2D gain patterns of=1.20GHz frequency points.Wherein, solid line table
Show the faces E-（Horizontal plane）, the faces dotted line expression H-（Vertical plane）.Known by figure, gainGThe face=2.48dBi, E（Horizontal plane）Out-of-roundness
Preferably（<10dB）.
Figure 13 is ultra wide band horizontally polarized omnidirectional antennaf 2 The 2D gain patterns of=1.55GHz frequency points.Wherein, solid line table
Show the faces E-（Horizontal plane）, the faces dotted line expression H-（Vertical plane）.Known by figure, gainGThe face=3.72dBi, E（Horizontal plane）Out-of-roundness
Preferably（<12.5dB）.
Figure 14 is ultra wide band horizontally polarized omnidirectional antennaf 3 The 2D gain patterns of=1.95GHz frequency points.Wherein, solid line table
Show the faces E-（Horizontal plane）, the faces dotted line expression H-（Vertical plane）.Known by figure, gainGThe face=2.68dBi, E（Horizontal plane）Out-of-roundness
Preferably（<7dB）.
Figure 15 is ultra wide band horizontally polarized omnidirectional antennaf 4 The 2D gain patterns of=2.30GHz frequency points.Wherein, solid line table
Show the faces E-（Horizontal plane）, the faces dotted line expression H-（Vertical plane）.Known by figure, gainGThe face=2.51dBi, E（Horizontal plane）Out-of-roundness
It is poor（<15dB）.
Figure 16 is the maximum gain of ultra wide band horizontally polarized omnidirectional antenna with frequencyfVariation characteristic.Wherein, horizontal axis（X-axis）
It is frequencyf, unit GHz；The longitudinal axis（Y-axis）It is gain, unit is dBi.Known by figure, is with interior gain variation rangeG=2.5~
4.8 dBi improve nearly 1 ~ 2dBi than printing Alford loop antennas.
Figure 17 is the efficiency of ultra wide band horizontally polarized omnidirectional antennaη A With frequencyfChange curve.Wherein, horizontal axis（X-axis）It is
Frequencyf, unit GHz；The longitudinal axis（Y-axis）It is efficiency.Known by figure, in entire frequency band, antenna efficiencyη A >=88%, efficiency is higher.
The preferred embodiment that these are only the present invention, is not limited to or limits the present invention.For grinding for this field
Study carefully or technical staff for, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made by
Any modification, equivalent substitution, improvement and etc. should be included within the protection domain that the present invention is stated.
Claims (7)
1. ultra wide band horizontally polarized omnidirectional antenna, it is characterised in that：Including Alford rings upper arm, Alford rings underarm and feed
Cable；
The Alford ring upper arm are equipped with linear upper conductor feeder line, are respectively equipped with from the center of upper conductor feeder line to both sides
Quantity is equal, from short to long, from least three circular arc oscillators down to height arrangement, the radian of circular arc oscillator is π/4, is led upper
Body feeder line side rotation direction interlock oppositely arranged all circular arc oscillators using the center of upper conductor feeder line as the center of circle rotate 180 ° after, with
The circular arc oscillator of the upper conductor feeder line other side is completely superposed；
The Alford ring underarms are arranged in the lower section of Alford ring upper arm, are equipped with linear lower conductor feeder line, are led from down
The center of body feeder line to both sides be respectively equipped with it is equal from short to long positioned at quantity, shake from least three circular arcs of high to low arrangement
Son, the radian of circular arc oscillator are π/4, and it is symmetry axis on Alford rings that Alford ring underarms, which are using the axis of upper conductor feeder line,
The complete mirror image of arm；
The internal and external conductor of the feed cable point is connected with upper conductor feeder line and lower conductor feeder line.
2. ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：The top of the upper conductor feeder line
The middle section of face and bottom end is plane, and the plane length of top surface middle section is less than the plane length of bottom surface middle section,
Top and bottom are from center toward the gradual squint upward of two side directions.
3. ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：The width of the circular arc oscillator
With arc length ratio about 0.05 ~ 0.15, the radius of most interior circular arc oscillator is（0.15~0.20）×λ L , outermost circular arc oscillator
Radius is（0.80~1.0）×λ L , whereinλ L For lowest operating frequency.
4. ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：The Alford rings upper arm and
It is air or filled media layer between Alford ring underarms.
5. ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：The Alford rings upper arm or
Alford ring underarms are integrally formed.
6. ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：The Alford rings upper arm or
Alford rings are made using good metallic conductor.
7. the construction method of ultra wide band horizontally polarized omnidirectional antenna as described in claim 1, it is characterised in that：Including following step
Suddenly,
Step 1 establishes rectangular coordinate system in space；
Step 2 constructs the upper arm of Alford rings：In XOY plane, with coordinate originOFor the center of circle, make at least three radiuses respectively
Not equal, radian is the circular arc oscillator of π/4, and the initial angle of circular arc oscillator is identical, rotation direction is staggeredly reversed, arranges from down to height, to sit
Mark originOCentered on above-described at least three circular arc oscillators are replicated after, the circular arc oscillator of duplication is rotated 180 ° together,
Three pairs of rotational symmetry, initiating terminal are constituted in the arc section of same diameter, one is placed on the initiating terminal line of all circular arc oscillators
Root upper conductor feeder line is linked together with three pairs of arc sections, constitutes the upper arm of Alford rings；
Step 3 constructs the underarm of Alford rings, by the Alford rings upper arm of step 2 using upper conductor feeder line axis as symmetry axis,
Image copying is carried out to Alford ring upper arm, then its mirrored portion is removed into a distance downwards, forms Alford rings
Underarm；
Step 4, at the symmetrical centre of the two-arm up and down of the Alford rings of step 3, by a feed cable internal and external conductor point
It is not connected with upper conductor feeder line and lower conductor feeder line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191680.8A CN108598673B (en) | 2018-03-08 | 2018-03-08 | Ultra-wideband horizontally polarized omnidirectional antenna and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191680.8A CN108598673B (en) | 2018-03-08 | 2018-03-08 | Ultra-wideband horizontally polarized omnidirectional antenna and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108598673A true CN108598673A (en) | 2018-09-28 |
| CN108598673B CN108598673B (en) | 2023-08-08 |
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