CN208986191U - Compact dual-frequency ultra-wideband omni-directional antenna - Google Patents
Compact dual-frequency ultra-wideband omni-directional antenna Download PDFInfo
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Abstract
Compact dual-frequency ultra-wideband omni-directional antenna, it mainly include asymmetrical vibrator, coaxial cable and antenna house, asymmetrical vibrator can single side setting or two-sided setting, and by being arranged on medium substrate and being formed by oscillator upper arm and oscillator lower arm setting up and down, oscillator lower arm is in H-type, oscillator upper arm is joined end to end by the waney rectangular section of multistage from top to bottom and is formed, in the space at the top that the rectangular section of bottom with oscillator lower arm did not contacted and be embedded in oscillator lower arm, coaxial cable feeds asymmetrical vibrator, antenna house is located at the outside of asymmetrical vibrator, realize double frequency ultra wide bandwidth (0.698 ~ 0.96GHz of omnidirectional antenna, BW=262MHz, 31.60%, VSWR < 2.25；1.427 ~ 2.70GHz, BW=1273MHz, 61.7%, VSWR < 2.28), higher gain (G=1.4-2.73dBi), horizontal omnidirectional (out-of-roundness < 2.67dB), high efficiency (η A >=82%) and miniaturization (length and width are respectively 0.352 ×λ L 、0.065×λ L ).
Description
Technical field
It is complete more particularly to compact dual-frequency ultra wide band the utility model relates to a kind of radio antenna equipment and technology
To antenna.
Background technique
The development experience of mobile communication technology 1G, 2G, 3G and 4G just enter 5G epoch at present.It is well known that frequency spectrum is
The strategic resources of mobile communication, industry development are carried out around this theme always.Due to the scarcity of frequency spectrum resource, dedicated
Property, valuableness, next generation mobile communication technology is while planning a small amount of new frequency range, the whole in each generation or big before always continuing to use
Partial frequency spectrum.In addition, frequency planning has many characteristics, such as noncontinuity, discreteness, regional disparity.So that new and old frequency spectrum
Numerous frequency fragments be just dispersed in multiple ultrabroad bands.Furthermore due to the far super ultra-wideband antenna of multifrequency antenna design difficulty,
Then mobile communication antenna just form at present miniaturization, ultra wide band technology trends and route, such as covering 698 ~
960MHz/1427 ~ 2700MHz frequency range, to meet the whole of 1G to 4G and the portion requirements of 5G.In mobile communications, common
Antenna type has two kinds of orientation and omnidirectional.The former good directionality, high gain, coverage area are big, but size is big, at high cost, installation
It is inconvenient；The covering of the latter's horizontal omnidirectional, gain are low, however size is small, at low cost, installation is simple.In view of above-mentioned particular advantages, entirely
It is still widely applied in mobile communications so far to this most ancient antenna of antenna, such as GSM frequency range small base station antenna.Common
Omnidirectional antenna is divided to vertical (V) polarization and horizontal (H) to polarize two kinds.V polarized omnidirectional antenna is generally single half-wave dipole or all-wave
Coaxial group of battle array of oscillator or multiple oscillators.Realize that ultra wide band works, oscillator width or diameter need to increase or overstriking.Further
Ground, if realizing two or more ultrabroad bands, oscillator width or diameter will be bigger, thicker.However, in engineer application
Field, the size of most of antenna be it is strictly limited, it is oversized to bring problems, as wind load is big, unsightly, cost
High, installation inconvenience etc..Therefore, the omnidirectional antenna in practical application realizes that double-frequency broadband will when width or diameter limit
It is very difficult, however its engineering significance is very huge.
Utility model content
In order to solve the above technical problems, the utility model provide a kind of miniaturization, double frequency ultra wide band, high-gain, omni-directional,
High efficiency and highly reliable, structure is simple, low cost, vertical depolarized omnidirectional antenna easy to produce, and it is high for miniature ultra wide band
Gain omni-directional antenna design and improvement provide beneficial reference method.
To realize the above-mentioned technical purpose, used technical solution is: compact dual-frequency ultra-wideband omni-directional antenna, comprising:
Asymmetrical vibrator, single asymmetrical vibrator are arranged in the one side of medium substrate, or identical non-right by two pairs
Oscillator is claimed to be symmetricly set on the two sides of medium substrate, the asymmetrical vibrator on two sides is connected by metallization VIA battle array, asymmetric
For oscillator by being arranged on medium substrate and forming by oscillator upper arm and oscillator lower arm setting up and down, the oscillator lower arm is in H
Type comprising two support arms, the horizontal segment in two support arms of top connection and the parasitic minor matters being symmetrical set, two branch
Arm and horizontal segment surround the space at top and the space of bottom, and the parasitism being arranged by axis direction is provided in the space of bottom
Minor matters, oscillator upper arm are joined end to end by the waney rectangular section of multistage from top to bottom and are formed, and the width of rectangular section is by top
It is gradually reduced to bottom, is connected separately at left and right sides of the rectangular section at middle part outside at least one and connects minor matters, be located at bottom
The rectangular section top that does not contact and be embedded in oscillator lower arm with oscillator lower arm space in；
Coaxial cable, feeds asymmetrical vibrator, and the inner conductor of coaxial cable is connected to the rectangle of the bottom of oscillator upper arm
Section, the outer conductor of coaxial cable are connected at the center of the horizontal segment of oscillator lower arm, and are connected along the center line of asymmetrical vibrator
Extend in parasitic minor matters towards the bottom of oscillator lower arm；
Antenna house is located at the outside of asymmetrical vibrator.
Omnidirectional antenna further includes two pairs of load pieces, and two pairs of load pieces load the oscillator upper arm that asymmetrical vibrator is arranged in respectively
On oscillator lower arm, each pair of load piece includes that two panels is separately positioned on the both sides of the edge of oscillator upper arm or oscillator lower arm and by same
The central axis of the load piece of rotation direction setting, each pair of load piece is overlapped with the center line of asymmetrical vibrator.
The start-stop position of a pair of of load piece on oscillator upper arm is arranged in the top top of oscillator upper arm and oscillator in load
The medium position of upper arm, load be arranged in the start-stop position of a pair of of load piece on oscillator lower arm in the horizontal segment of oscillator lower arm and
The bottom end of oscillator lower arm.
Load piece rapidoprint be metal good conductor, load piece shape be cylindrical surface, straight bending side, flat face or its
His curved surface.
The middle part of horizontal segment protrudes minor matters downward.
The total length of the length for being shorter in length than oscillator lower arm of oscillator upper arm, oscillator upper arm and oscillator lower arm less than 0.5 ×λ L , oscillator width be (0.055-0.07) ×λ L ,λ L For minimum operation wavelength.
Two support arms are joined end to end by the waney oscillator segmentation of multistage and are formed, and the width of oscillator segmentation is by the top bottom of to
Portion becomes larger.
Dielectric constant=1 ~ 20 of the baseplate material of medium substrate.
The shape of antenna house is cylindrical or flat rectangle.
Antenna house rapidoprint is glass reinforced plastic, ASA, ABS, UABS, PC or PVC.
The utility model beneficial effect is:
The positive effect of the utility model is, by taking following measures: 1) broadband asymmetrical vibrator is designed, on
Lower arm distinguishes T-shaped, H-shaped；2) two-arm middle section is chimeric up and down for oscillator；3) oscillator arms edge loads cylindrical surface thin slice；4) same
Shaft cable feed.By optimizing the geometric parameter of above each section, the utility model realizes the double frequency ultra wide band of omnidirectional antenna
Wide (0.698 ~ 0.96GHz, BW=262MHz, 31.60%, VSWR < 2.25；1.427 ~ 2.70GHz, BW=1273MHz, 61.7%,
VSWR < 2.28), higher gain (G=1.4-2.73dBi), horizontal omnidirectional (out-of-roundness < 2.67dB), high efficiency (η A >=82%)
With miniaturization (length and width are respectively 0.352 ×λ L 、0.065×λ L ).In oscillator situation of same size, the bandwidth ratio of this programme is not
The bandwidth of load slice of cylinder at least promotes 15%, than 50% or more conventional symmetric oscillator broadening.Alternatively, when bandwidth is identical, oscillator
Width at least reduces 30%.The successful realization of this innovative techniques thinking is the weight for minimizing ultra-wide ultra-wideband omni-directional antenna technology
Gonna breakthrough has further pushed the development of V polarized omnidirectional antenna technology, has most important theories meaning and engineering application value.
In addition, this method also has, thinking novelty, clear principle, method is pervasive, realization is simple, it is inexpensive, be suitble to batch
The features such as production, be miniaturization, double frequency ultra wide band, high-gain, high efficiency, low cost V polarized omnidirectional antenna preferred embodiment.
Moreover, for miniature ultra wide band high-gain V polarized omnidirectional antenna, miniaturized multifrequency high-gain V polarized omnidirectional antenna, Yi Ji little
The design and improvement of type super-wide band high-gain H/V dual-polarization omnidirectional antenna are also applicable and effective.
Detailed description of the invention
Fig. 1 is the schematic diagram that rectangular coordinate system used by antenna model defines.
Fig. 2 is the front view of asymmetrical vibrator model.
Fig. 3 is the side view of compact dual-frequency ultra-wideband omni-directional antenna model.
Fig. 4 a is the top view of the compact dual-frequency ultra-wideband omni-directional antenna model with circular antenna cover.
Fig. 4 b is the top view of the compact dual-frequency ultra-wideband omni-directional antenna model with flat antenna house.
Fig. 5 a is the vertical view that the shape of a pair of of load piece is the compact dual-frequency ultra-wideband omni-directional antenna model of straight bending side
Figure.
Fig. 5 b is the top view that the shape of a pair of of load piece is the compact dual-frequency ultra-wideband omni-directional antenna model of flat face.
Fig. 5 c is the vertical view that the shape of a pair of of load piece is the compact dual-frequency ultra-wideband omni-directional antenna model of other curved surfaces
Figure.
Fig. 6 is the right view of compact dual-frequency ultra-wideband omni-directional antenna model.
Fig. 7 is the front view of compact dual-frequency ultra-wideband omni-directional antenna model.
Fig. 8 is the input impedance of compact dual-frequency ultra-wideband omni-directional antennaZ in Frequency characteristic.
Fig. 9 is the standing-wave ratio VSWR curve of compact dual-frequency ultra-wideband omni-directional antenna.
Figure 10 is the reflection coefficient of compact dual-frequency ultra-wideband omni-directional antenna |S 11 | curve.
Figure 11 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 1 The gain pattern of=698MHz.
Figure 12 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 2 The gain pattern of=960MHz.
Figure 13 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 3 The gain pattern of=1427MHz.
Figure 14 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 4 The gain pattern of=1710MHz.
Figure 15 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 5 The gain pattern of=2200MHz.
Figure 16 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 6 The gain pattern of=2500MHz.
Figure 17 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 7 The gain pattern of=2700MHz.
Figure 18 is the gain of compact dual-frequency ultra-wideband omni-directional antennaGWith frequencyfVariation characteristic.
Figure 19 is the face the H out-of-roundness of compact dual-frequency ultra-wideband omni-directional antenna with frequencyfChange curve.
Figure 20 is the face E- (vertical plane) the half-power beam width HBPW of compact dual-frequency ultra-wideband omni-directional antenna with frequencyf
Variation characteristic.
Figure 21 is the efficiency of compact dual-frequency ultra-wideband omni-directional antennaη A With frequencyfChange curve.
Specific embodiment
The preferred embodiment of the utility model is provided, with reference to the accompanying drawing the technical side of the utility model is described in detail
Case.Here, respective drawings will be provided the utility model is described in detail.It should be strongly noted that as described herein
Example is preferably implemented to be only used for describing and explaining the present invention, is not limited to or limits the utility model.
The utility model is it is intended that mobile communication provides a kind of miniaturization, double frequency ultra wide band, high-gain, omni-directional, efficiently
Rate and highly reliable, structure is simple, low cost, vertical depolarized omnidirectional antenna easy to produce, and be miniature ultra wide band high-gain
Design of Omnidirectional Antenna and improvement provide beneficial reference method.
As shown in figure 3, compact dual-frequency ultra-wideband omni-directional antenna, mainly includes asymmetrical vibrator 10,500 He of coaxial cable
Antenna house 600.
As shown in Figure 2 and Figure 3, asymmetrical vibrator 10 can single side setting or two-sided setting, i.e. single asymmetrical vibrator 10 is arranged
In the one side of medium substrate 300, or two identical asymmetrical vibrators 10 are symmetricly set on to the two sides of medium substrate 300
On, the asymmetrical vibrator 10 on two sides is connected by metallization VIA battle array 108,208, and metallization VIA is distributed in each of oscillator arms
Place, the aperture of upper and lower metallization VIA battle array is identical, and the asymmetrical vibrator 10 of two-sided setting can be used for supporting tired fixed in addition increase
Load piece, single side and two-sided bandwidth, gain, efficiency do not have significant difference.
Asymmetrical vibrator 10 is by being arranged on medium substrate 300 and by oscillator upper arm 100 and oscillator lower arm setting up and down
200 compositions, oscillator upper arm and oscillator lower arm are asymmetric, and the length and shape of the two are not identical, and width is settable consistent, medium base
The edge of plate is the edge of asymmetrical vibrator.
Oscillator lower arm 200 is in H-type comprising two support arms 207 being symmetrical set connect two support arms at top
207 horizontal segment 204 and parasitic minor matters 206, two support arms 207 and horizontal segment 204 surround the space at top and the sky of bottom
Between, the parasitic minor matters 206 being arranged by axis direction are provided in the space of bottom, support arm 207 may be designed to multi-segment structure；Two
A support arm 207 is joined end to end by the waney oscillator segmentation 207-1 of multistage and is formed, and it is rectangular section that oscillator, which is segmented 207-1, vibration
The width of son segmentation 207-1 is become larger by top to bottom.For example, as shown in Fig. 2, support arm from top the bottom of to be respectively that top is prolonged
Stretch section 201, middle part strip section 202, wide section 205 of bottom, the intersection of top extended segment 201 and middle part strip section 202 is connected with
Horizontal segment 204.
Oscillator upper arm 100 is imitative T-type structure, and oscillator upper arm 100 is from top to bottom by the waney rectangular section 109 of multistage
Join end to end composition, and the width of rectangular section 109 is gradually reduced by top to bottom, positioned at the left and right two of the rectangular section 109 at middle part
Side, which is connected separately with outside at least one, connects minor matters 103, and the shape of outer even minor matters 103 can be T-type shape, as shown in Fig. 2, connecting outside
Minor matters 103 are connected to the middle part of oscillator upper arm 100 by one section of vertical minor matters 104 by horizontal minor matters 105, and position is in oscillator
Others can also be used other than vertical minor matters 104 in position between the top rectangular section and oscillator lower arm 200 of upper arm 100
Shape is maximized extended antenna effect, and the side edge position of vertical minor matters 104 is consistent with the edge of lower arm on oscillator, position
In in the space at the top that the rectangular section 109 of bottom with oscillator lower arm 200 did not contacted and be embedded in oscillator lower arm 200；For example, such as
The oscillator upper arm 100 of Fig. 2, as indicated at 3, T shape are first by the wide rectangle 101 in top, the wider rectangle 102 in middle part and narrow base rectangle 106
Tail, which is connected, to be formed.Wherein, there are a pair of short vertical minor matters 104 parallel with it in wider 102 two sides of rectangle in middle part, they pass through level
Minor matters 105 are connected with the wider rectangle 102 in middle part, and narrow base rectangle 106 stretches between the top arm of oscillator lower arm 200, and
It is terminated on the horizontal connection section top close to lower arm top, has gap between telescoping part among upper and lower two-arm.
It is connected to the feeding point of asymmetrical vibrator with 50 Ω coaxial cables, asymmetrical vibrator 10 is fed, coaxial cable 500
Inner conductor be connected to oscillator upper arm 100 bottom rectangular section 109, the outer conductor of coaxial cable 500 is connected to oscillator lower arm
At the center of 200 horizontal segment 204, and parasitic minor matters 206 are connected to towards oscillator lower arm 200 along the center line of asymmetrical vibrator 10
Bottom extend.
Antenna house 600 is located at the outside of asymmetrical vibrator 10, and antenna house is arranged according to the shape of asymmetrical vibrator 10, when
When being not loaded with load piece, to reduce antenna size, the non-surface to your PCB oscillator 10 of the inner wall of antenna house exchange premium as far as possible, example
Such as prolate shape.When load loads piece, the inner arm of antenna house is designed according to the tilted shape of load piece, for example, antenna house
600 shape is cylindrical or flat rectangle.600 rapidoprint of antenna house is glass reinforced plastic, ASA, ABS, UABS, PC or PVC.
For the frequency range spread over, omnidirectional antenna, which can load, is arranged two pairs of load pieces 401,402, two pairs of load pieces 401,
402 respectively load be arranged on the oscillator upper arm 100 and oscillator lower arm 200 of asymmetrical vibrator 10, each pair of load piece 401,402 packet
The load piece that two panels is separately positioned on the both sides of the edge of oscillator upper arm 100 or oscillator lower arm 200 and is arranged by same rotation direction is included, often
The central axis of load piece 401,402 is overlapped with the center line of asymmetrical vibrator 10.
It is pushed up at the top of oscillator upper arm 100 the start-stop position that a pair of of load piece 401 on oscillator upper arm 100 is arranged in load
The medium position at end and oscillator upper arm 100, the medium position should end to outer even minor matters 103, cannot externally connect the production of minor matters 103
Life is blocked, and horizontal segment of the start-stop position in oscillator lower arm 200 of a pair of of load piece 401 on oscillator lower arm 200 is arranged in load
204 and oscillator lower arm 200 bottom end.Two pairs of load pieces 401,402 of such setting can just play optimal effect.
Two pairs load pieces 401,402 rapidoprints be metal good conductor, load piece 401,402 shape be cylindrical surface,
Straight bending side, flat face or other curved surfaces.The shape that piece is loaded as shown in Fig. 4 a, Fig. 4 b is cylindrical surface, as shown in Figure 5 a
The shape for loading piece is straight bending side, and the shape of load piece as shown in Figure 5 b is flat face, load piece as shown in Figure 5 c
Shape is other curved surfaces, i.e., other curved-surface structures on non-positive round cylindrical surface, and the radian or length of same internal load piece can be with
Unequal, two pairs of radians for loading piece or length can be unequal, by taking shape is the load piece on cylindrical surface as an example, in asymmetric vibration
Sub two-arm edge up and down respectively loads a pair of of cylindrical surface thin slice along oscillator direction, and the rotation direction of each slice of cylinder is all the same, their axis
Line is overlapped with oscillator center line, and radius is the half of Jie's substrate width, central angleθ=0~180 °, 0 ° is to be not loaded with load piece
Situation；A side of slice of cylinder is close to oscillator edge, and another side is then far from medium substrate；Cylindrical surface thin slice on oscillator upper arm
Start stop bit be set to the top width rectangle of oscillator upper arm, the start-stop position of the cylindrical surface thin slice on oscillator lower arm is then in oscillator lower arm
Middle part strip section at the top of, near the end Kuan Duan of bottom；Two pairs of cylindrical surface thin slice inner side edges are after medium substrate and in medium
One side in substrate tow sides or front and back sides is welded with oscillator arms.
The middle part of horizontal segment 204 protrudes minor matters 203 downward, minor matters 203 outstanding be under the middle part of horizontal segment 204 to
Extend one section, as shown is one section of rectangular section.
The length for being shorter in length than oscillator lower arm 200 of oscillator upper arm 100, the total length of oscillator upper arm 100 and oscillator lower arm
Less than 0.5 ×λ L , oscillator width be (0.055-0.07) ×λ L ,λ L For minimum operation wavelength.Horizontal segment, which is located at, to be originated from top
At the 1/7-1/5 of oscillator lower arm, the optimization length of oscillator upper arm 100 is 0.12-0.16λ L , the optimization length of oscillator lower arm 200
For 0.18-0.24λ L 。
Dielectric constant=1 ~ 20 of the baseplate material of medium substrate 300, the various common vehicles as including air
Plate, such as FR4, F4B.When the material of medium substrate is air, asymmetrical vibrator is set up directly in antenna house.
By taking two-sided asymmetrical vibrator as an example, the design method of compact dual-frequency ultra-wideband omni-directional antenna the following steps are included:
Step 1 establishes rectangular coordinate system in space, sees Fig. 1；
Step 2 constructs asymmetrical vibrator.In XOY plane, on Y direction one asymmetrical vibrator of construction, oscillator
An approximate T shape and a H-shaped, T shape oscillator upper arm 100 are wider by the wide rectangle 101 in top, middle part respectively for arm 100 and lower arm 200
Rectangle 102 and narrow base rectangle 106 join end to end, and structure is at T-shaped.Wherein, there are vertical minor matters 104 in rectangle 102 two sides in middle part,
They are connected by horizontal minor matters 105 with middle part rectangle 102, and two T shape oscillator upper arm 100 are symmetrically distributed in medium substrate 300
Tow sides, and by metallization VIA battle array 108 be connected；H-shaped oscillator lower arm 200 is then by top extended segment 201, middle part strip
Section 202, wide section 205 of bottom, and parasitic minor matters 206 form, and left-right parts are connected on top by horizontal segment 204, structure
At H-shaped, there are minor matters 203 outstanding downward at the middle part of horizontal segment 204, and H-shaped oscillator lower arm is being symmetrically distributed in medium substrate 300 just
Anti- two sides, and be connected by metallization VIA battle array 208, as shown in Figure 2；
Step 3, Bian Zhenzi edge load load slice of cylinder.The both sides of the edge of lower arm on the asymmetrical vibrator of step 2,
Each asymmetrical load a pair of cylindrical sheet 401,402, sheet length is along oscillator direction, and inner side edge is close to oscillator edge, outside
Side is then far from medium substrate；The central axis of cylindrical sheet is overlapped with the center line of medium substrate 300, radiusRAbout substrate
Half width；The start-stop position of cylindrical sheet 401 is in the wide rectangle 101 in the top of oscillator upper arm, the start-stop position of cylindrical sheet 402
Then near 202 top of the middle part elongated segment of oscillator lower arm, the bottom end Kuan Duan205；Upper and lower two pairs of slice of cylinder and each pair of cylinder
Two thin slice rotation directions in piece are the central angle of two pairs of thin slices clockwise or counterclockwiseθ=0~180°；Upper and lower thin slice 401,402 sides
Side passes through medium substrate and welds in any one side of its tow sides or front and back sides with oscillator arms, as shown in Fig. 3 ~ 7；
Step 4, coaxial cable feed.With 50 Ω coaxial cables 500 of a standard, it is connected to the feedback of asymmetrical vibrator
Electricity point 107, inner conductor 501 is connected to the bottom of the narrow base rectangle 106 of oscillator upper arm 100, and outer conductor 502 is then connected to vibration
The center of the top horizontal section 204 of sub- lower arm 200, cable extend along oscillator center line towards the bottom end of oscillator 205, see Fig. 2, Fig. 7
It is shown；
Antenna house is arranged in step 5.Step 4 slice of cylinder load asymmetrical vibrator on the outside of, load a cylinder or
The antenna house 600 of flat, to protect antenna body, as shown in Fig. 4 a, Fig. 4 b, Fig. 5 a, Fig. 5 b, Fig. 5 c.
Fig. 8 is the input impedance of compact dual-frequency ultra-wideband omni-directional antennaZ in Frequency characteristic.Wherein, horizontal axis (X
Axis) it is frequencyf, unit GHz；The longitudinal axis (Y-axis) is impedanceZ in , unit Ω;Solid line indicates real partR in , dotted line expression imaginary partX in .Known by figure, in the frequency range of 0.698 ~ 0.96GHz/1.71 ~ 2.70, real and imaginary parts variation range be respectively as follows :+25 ~+100 Ω ,-
25 ~+3 Ω and+32 ~+53 Ω, -21 ~+25 Ω have apparent double frequency ultra wide band impedance operator.
Fig. 9 is the standing-wave ratio VSWR curve of compact dual-frequency ultra-wideband omni-directional antenna.Wherein, horizontal axis (X-axis) is frequencyf,
Unit is GHz；The longitudinal axis (Y-axis) is VSWR.Known by figure, antenna GSM frequency range (0.698 ~ 0.96GHz, BW=262MHz,
31.60%) with LTE frequency range (1.427 ~ 2.70GHz, BW=1273MHz, 61.7%), good impedance matching, standing wave are realized
2.25 and 2.28 are respectively smaller than than VSWR, minimum reaches 1.05, and relative bandwidth is respectively 31.60%, 61.7%, and it is super to realize double frequency
Wideband operation.
Figure 10 is the reflection coefficient of compact dual-frequency ultra-wideband omni-directional antenna |S 11 | curve.Wherein, horizontal axis (X-axis) is frequencyf, unit GHz；The longitudinal axis (Y-axis) isS 11 Amplitude |S 11 |, unit dB.Known by figure, antenna GSM frequency range (0.698 ~
0.96GHz, BW=262MHz, 31.60%) and LTE frequency range (1.427 ~ 2.70GHz, BW=1273MHz, 61.7%), it realizes good
Good impedance matching, reflection coefficient |S 11 | it is respectively smaller than -8.2dB, -9.8dB, minimum reachable -34dB, relative bandwidth is respectively
31.60%, 61.7%, realize the work of double frequency ultra wide band.
Figure 11 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 1 The gain pattern of=698MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 0.08dB, and horizontal homogeneity is ideal, and E surface wave beam is wider,
HPBW=75.5 °, gainG=1.71dBi, about 0.4dB lower than conventional half wave oscillator.
Figure 12 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 2 The gain pattern of=960MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 0.17dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=98.7 °, gainG=1.50dBi, about 0.6dB lower than conventional half wave oscillator.
Figure 13 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 3 The gain pattern of=1427MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 0.41dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=69.5 °, gainG=2.12dBi is suitable with conventional half wave magnon gain.
Figure 14 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 4 The gain pattern of=1710MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 0.53dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=61.25 °, gainG=2.21dBi is suitable with conventional half wave magnon gain.
Figure 15 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 5 The gain pattern of=2200MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 0.96dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=86.0 °, gainG=1.85dBi, about 0.3dB lower than conventional half wave magnon gain.
Figure 16 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 6 The gain pattern of=2500MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 1.65dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=48.35 °, gainG=2.17dBi is suitable with conventional half wave magnon gain.
Figure 17 is that compact dual-frequency ultra-wideband omni-directional antenna existsf 7 The gain pattern of=2700MHz.Wherein, solid line indicates H
Face (horizontal plane), dotted line indicate the face E (vertical plane), and out-of-roundness is less than 2.67dB, and horizontal homogeneity is ideal, and H surface wave beam is wider,
HPBW=38.0 °, gainG=2.73dBi, about 0.5dBi higher than conventional half wave oscillator.
Figure 18 is the gain of compact dual-frequency ultra-wideband omni-directional antennaGWith frequencyfVariation characteristic.Wherein, horizontal axis (X-axis) is
Frequencyf, unit GHz；The longitudinal axis (Y-axis) is gainG, unit is dBi.Known by figure, low frequency and high-frequency gainGIt is respectively as follows: 1.4 ~
1.7dBi and 1.7 ~ 2.73 dBi, close to the gain of half-wave dipole.
Figure 19 is the face the H out-of-roundness of compact dual-frequency ultra-wideband omni-directional antenna with frequencyfChange curve.Wherein, horizontal axis (X
Axis) it is frequencyf, unit GHz；The longitudinal axis (Y-axis) is out-of-roundness, unit degree of being dB.Known by figure, in low frequency and high band, water
Plane (face H) directional diagram out-of-roundness (omni-directional or uniformity) is respectively 0.08 ~ 0.40dB, 0.41 ~ 2.67dBi, low frequency level
Homogeneous radiation characteristic is ideal, and high band is then slightly worse.
Figure 20 is the face E- (vertical plane) the half-power beam width HBPW of compact dual-frequency ultra-wideband omni-directional antenna with frequencyf
Variation characteristic.Wherein, horizontal axis (X-axis) is frequencyf, unit GHz；The longitudinal axis (Y-axis) is beam angle, unit degree of being (deg).By
Figure knows that the face the E half-power wave of low frequency and high frequency is wide to be respectively as follows: HPBW=75.5o~98.7oWith 38.0o~92.0o, the face low-frequency range E
Wave is wide, and increases with frequency, the then wide big rise and fall of E surface wave in high band.
Figure 21 is the efficiency of compact dual-frequency ultra-wideband omni-directional antennaη A With frequencyfChange curve.Wherein, horizontal axis (X-axis)
It is frequencyf, unit GHz；The longitudinal axis (Y-axis) is efficiency.Known by figure, in low frequency and high band, antenna efficiencyη A >=82%, highest
Reach 99%.
Claims (10)
1. compact dual-frequency ultra-wideband omni-directional antenna, it is characterised in that: include:
Asymmetrical vibrator (10), single asymmetrical vibrator (10) are arranged in the one side of medium substrate (300), or by two phases
Same asymmetrical vibrator (10) is symmetricly set on the two sides of medium substrate (300), and the asymmetrical vibrator (10) on two sides is by gold
Categoryization via hole battle array (108,208) is connected, asymmetrical vibrator (10), by being arranged on medium substrate (300) and by setting up and down
Oscillator upper arm (100) and oscillator lower arm (200) composition, the oscillator lower arm (200) are in H-type comprising are symmetrical set
Two support arms (207), top connect two support arms (207) horizontal segment (204) and parasitic minor matters (206), two branch
Arm (207) and horizontal segment (204) surround the space at top and the space of bottom, are provided in the space of bottom by axis direction
The parasitic minor matters (206) of setting, oscillator upper arm (100) is from top to bottom by the waney rectangular section of multistage (109) head and the tail phase
It even forms, the width of rectangular section (109) is gradually reduced by top to bottom, positioned at the left and right sides of the rectangular section (109) at middle part
It is connected separately with outside at least one and connects minor matters (103), the rectangular section (109) positioned at bottom does not contact simultaneously with oscillator lower arm (200)
It is embedded in the space at the top of oscillator lower arm (200)；
Coaxial cable (500), feeds asymmetrical vibrator (10), and the inner conductor of coaxial cable (500) is connected to oscillator upper arm
(100) outer conductor of the rectangular section (109) of bottom, coaxial cable (500) is connected to the horizontal segment of oscillator lower arm (200)
(204) at center, and parasitic minor matters (206) are connected to towards oscillator lower arm (200) along the center line of asymmetrical vibrator (10)
Bottom extends；
Antenna house (600), is located at the outside of asymmetrical vibrator (10).
2. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: omnidirectional antenna further includes two pairs
It loads piece (401,402), the oscillator upper arm in asymmetrical vibrator (10) is arranged in load to two pairs of loads piece (401,402) respectively
(100) and on oscillator lower arm (200), each pair of load piece (401,402) includes that two panels is separately positioned on oscillator upper arm (100) or vibration
The both sides of the edge of sub- lower arm (200) simultaneously by same rotation direction setting load piece, it is each pair of load piece (401,402) central axis with
The center line of asymmetrical vibrator (10) is overlapped.
3. compact dual-frequency ultra-wideband omni-directional antenna as claimed in claim 2, it is characterised in that: load is arranged in oscillator upper arm
(100) the top top and oscillator upper arm (100) of the start-stop position of a pair of of load piece (401) in oscillator upper arm (100)
Medium position, the start-stop position for a pair of of load piece (401) that load is arranged on oscillator lower arm (200) is in oscillator lower arm (200)
Horizontal segment (204) and oscillator lower arm (200) bottom end.
4. compact dual-frequency ultra-wideband omni-directional antenna as claimed in claim 2, it is characterised in that: two pairs of load pieces (401,
402) rapidoprint is metal good conductor, and the shape of load piece (401,402) is cylindrical surface, straight bending side, flat face or song
Face.
5. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: the middle part of horizontal segment (204)
Minor matters (203) are protruded downward.
6. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: the length of oscillator upper arm (100)
Degree is shorter than the length of oscillator lower arm (200), the total length of oscillator upper arm (100) and oscillator lower arm less than 0.5 ×λ L , oscillator width
For (0.055-0.07) ×λ L ,λ L For minimum operation wavelength.
7. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: two support arms (207) by
Multistage waney oscillator segmentation (207-1) joins end to end composition, the width of oscillator segmentation (207-1) by top to bottom gradually
Become larger.
8. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: the base of medium substrate (300)
Dielectric constant=1 ~ 20 of plate material.
9. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: the shape of antenna house (600)
For cylindrical or flat rectangle.
10. compact dual-frequency ultra-wideband omni-directional antenna as described in claim 1, it is characterised in that: antenna house (600) processes material
Material is glass reinforced plastic, ASA, ABS, UABS, PC or PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821877214.7U CN208986191U (en) | 2018-11-15 | 2018-11-15 | Compact dual-frequency ultra-wideband omni-directional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821877214.7U CN208986191U (en) | 2018-11-15 | 2018-11-15 | Compact dual-frequency ultra-wideband omni-directional antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208986191U true CN208986191U (en) | 2019-06-14 |
Family
ID=66791035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821877214.7U Withdrawn - After Issue CN208986191U (en) | 2018-11-15 | 2018-11-15 | Compact dual-frequency ultra-wideband omni-directional antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208986191U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378587A (en) * | 2018-11-15 | 2019-02-22 | 广东通宇通讯股份有限公司 | Compact dual-frequency ultra-wideband omni-directional antenna |
| WO2021078260A1 (en) * | 2019-10-25 | 2021-04-29 | 深圳市道通智能航空技术有限公司 | Dual-band antenna and aerial vehicle |
-
2018
- 2018-11-15 CN CN201821877214.7U patent/CN208986191U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378587A (en) * | 2018-11-15 | 2019-02-22 | 广东通宇通讯股份有限公司 | Compact dual-frequency ultra-wideband omni-directional antenna |
| CN109378587B (en) * | 2018-11-15 | 2024-01-05 | 广东通宇通讯股份有限公司 | Miniaturized dual-band ultra-wideband omnidirectional antenna |
| WO2021078260A1 (en) * | 2019-10-25 | 2021-04-29 | 深圳市道通智能航空技术有限公司 | Dual-band antenna and aerial vehicle |
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