CN206595384U - The aerial array of high power low profile helical antenna and its composition - Google Patents
The aerial array of high power low profile helical antenna and its composition Download PDFInfo
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- CN206595384U CN206595384U CN201720182841.8U CN201720182841U CN206595384U CN 206595384 U CN206595384 U CN 206595384U CN 201720182841 U CN201720182841 U CN 201720182841U CN 206595384 U CN206595384 U CN 206595384U
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- helical antenna
- low profile
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- conveyor screw
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Abstract
The utility model is related to High-Power Microwave technical field.The utility model discloses a kind of high power low profile helical antenna, including coaxial waveguide, reflection back of the body chamber, conveyor screw and matching spheroid, the inner wire top of the coaxial waveguide is connected with matching spheroid, the matching spheroid is connected with conveyor screw, the conveyor screw ascent direction points to inner wire extended line direction, the outer conductor of the coaxial waveguide is connected with reflection back of the body chamber, the reflection back of the body chamber is placed in the top of coaxial waveguide outer conductor, the reflection back of the body chamber diameter ＞ coaxial waveguide external diameters, the conveyor screw is at least partially disposed in reflection back of the body intracavitary.The utility model also discloses a kind of high power low profile helical antenna array, and being arranged in array by N number of helical antenna is constituted, N >=2.High power low profile helical antenna of the present utility model, which has, reflects the characteristics of small, power capacity is high, axial dimension is short, is especially suitable for aerial array group battle array.
Description
Technical field
The utility model is related to High-Power Microwave technical field, particularly high power microwave radiation field, and in particular to one
Plant novel high-power low profile helical antenna.
Background technology
In recent years, high power microwave radiation technology is quickly grown, because array antenna is easily achieved high-gain, the height of antenna
Efficiency, high power and circular polarization radiation etc. and it is in widespread attention.High-power radial line array is that one kind should suitable for high power
Novel radiation antenna, there is now high power circle battle array [Li Xiangqiang；Zhao Liu；.GW grades of high-power radial line helical array of Chen Xiaobo
Antenna, Southwest Jiaotong University's journal, 2009], [Ma Rui, Liu Qing think rectangular grid high power rectangle battle array, Lee's mutually strong .64 unit squares
The design of shape radial direction linear array antenna feeding network, light laser and the particle beams, 2011] and triangular lattice high power rectangle battle array
[Ma Rui, Liu Qing think, the design of Lee's mutually strong .64 unit rectangle radial direction linear array antenna feeding networks, light laser and the particle beams,
A variety of array layout structures such as 2013].In order to realize the circular polarisation of array antenna, high-power radial line array antenna uses spiral shell
Rotation antenna is used as element antenna.
Helical antenna is widely used, and its form has many kinds.Earliest by American scientist John D Kraus in an experiment
It was found that it can be in axial radiation circularly polarised wave, scholars are according to the difference of practical application request afterwards, it is proposed that a variety of inhomogeneities
The helical antenna of type and structure, such as it is different according to the shape that helical antenna is coiled into, helical antenna can be divided into cylindrical helical
Antenna, tapered auger antenna, flat helical antenna etc..Cylindrical helical antenna [John D Kraus.50-OHM INPUT
IMPEDANCE FOR HELICAL BEAM ANTENNAS.IEEE Transactions on Antennas and
Propagation.1977] it is the cylindrical spiral that plain conductor is turned to certain size, its one end is in free state,
The other end is fed with coaxial inner conductor, and the metal ground plate of feed end is connected with the outer conductor of coaxial line.Axial radiation state
Cylindrical screw antenna the characteristics of have following:There are most strong radiation, radiation field to be circular polarisation, along spiral shell along antenna axis direction
It is wider that the current wave for revolving wire spread is traveling wave, input impedance is approximately equal to pure resistance, frequency band.Conical spiral antenna [Hu Hui
Beautiful jade；Tan Yunhua；Zhu Baicheng；The theory analysis of conical log-spiral antennas radiation characteristic, electric wave science journal, 2011] compared with cylinder
Helical antenna has broader frequency band, and can more meet the requirement of lobe width, and with helical antenna broad beam circular polarisation, body
Small, lightweight, the Stability Analysis of Structures of product, the features such as gain is higher under the change of various parameters, is widely used in satellite communication
In.Flat helical antenna [a kind of analyses of new-type planar Archimedean spiral antenna of Li Hui and design radars and confrontation,
2006] decades have been developed, relative to domestic technical merit, the comparative maturity of development abroad.What people were familiar with
Archimedean plannar spiral antenna is a kind of all channel antenna, because its compact conformation, size it is small, it is lightweight be able to extensive use
[warm refined low profiles, the research Master's thesis of circular polarisation Archimedian spiral antenna, 2014].Nowadays this antenna is visiting land mine
Preferable Effect on Detecting is obtained in reaching.
Above-mentioned axial mode helical antenna requires the number of turn more than 3 circles, about 12 °~14 ° of lead angle, and such limitation causes
The axial dimension of antenna is longer.Japanese scholars are found that the short helical antenna that few number of turn and minor spiral lift angle are combined under study for action
[H.Nakano,H.Takeda,T.Honma,et al.Extremely Low-profile Helix Radiating a
Circularly Polarized Wave.IEEE Trans.On Antennas and Propagation, 1991] equally may be used
To radiate good circularly polarised wave, the method that they use is by spiral at first minimum point of helix CURRENT DISTRIBUTION
Block, it has the advantages that, and lobe width is wide, axle is higher than good, gain, adds the characteristics of its axial dimension is short, is answered
[Nakano H, Takeda H, Kitamura Y, et al.Low-profile helical array are used in array antenna
antenna fed from a radial waveguide[J].IEEE Trans on Antennas and
Propagation,1992].Circularly polarised wave can be radiated using short helical antenna, short helical antenna is few due to the number of turns, it is relative with
Axial dimension is short for long spire, is used as the element antenna of array antenna, helps to reduce the axial dimension of array antenna,
Therefore using short helical antenna, as element antenna, [a strong vault high powers high-gain is radially more than high-power radial line array antenna
Line helical array antenna is studied, thesis for the doctorate, 2011].This kind of array antenna will realize the radiation of High-Power Microwave, should have compared with
High power capacity level, and the key for limiting its power capacity at present is element antenna.In order to improve short helical antenna
Power capacity level, mutually strong wait proposes a kind of improvement project for C-band application [Li Xiangqiang, Liu Qing thinks, Zhao Liu short spiral shells Lee
Revolve antenna Curve guide impeller microwave journals, 2009], the short helical antenna axial direction property coefficient after improvement is 8.75dB, axial axis
Than for 1.22dB, spiral number of turns are 1.5 circles.Afterwards, Zhang Ying waits quietly further study mutual coupling between the short spiral element antenna of reduction
Method, have studied a kind of short spiral-conical-horn antenna [the short spirals of-conical horn day such as Zhang Yingjing, Liu Qing think, strong vault
Line design and analysis light lasers and the particle beams, 2011], its unit spacing for being applied to array is more than the situation of 0.9 wavelength.
The studies above shows that helical antenna has developed many classes under the traction of different application background and application demand
Type and form, and applied.And at the early-stage, its power of research ability for the short helical antenna applied for High-Power Microwave
Capacity level also has suitable distance apart from actual demand, and its axial length is to realizing that the low profile of system has material impact.
Utility model content
Main purpose of the present utility model is to provide a kind of high power low profile helical antenna, raising helical antenna power
Capacity reduces helical antenna axial length.
To achieve these goals, according to the one side of the utility model embodiment, there is provided a kind of Gao Gong
Rate low profile helical antenna, including coaxial waveguide, reflection back of the body chamber, conveyor screw and matching spheroid, the inner wire of the coaxial waveguide
Top is connected with matching spheroid, and the matching spheroid is connected with conveyor screw, and the conveyor screw ascent direction points to inner wire extension
Line direction, the outer conductor of the coaxial waveguide is connected with reflection back of the body chamber, and the reflection back of the body chamber is placed in the top of coaxial waveguide outer conductor
End, the reflection back of the body chamber diameter ＞ coaxial waveguide external diameters, the conveyor screw is at least partially disposed in reflection back of the body intracavitary.
Further, the inner wire and conveyor screw of the coaxial waveguide are connected to matching two orthogonal diameters of spheroid
On, and coaxial waveguide inner wire axis with matching sphere diameter overlap.
Further, the conveyor screw is equal by two sections of line footpaths, and rotation direction is identical, the different helix connection structure of radius of turn
Into.
Further, the spiral linear diameter is equal with the inner wire diameter of coaxial waveguide, the matching sphere diameter
>=spiral the linear diameter
Further, the spiral number of wire turns is 0.8, and lead angle is 4.5 °.
Further, the conveyor screw and/or matching spheroid are hollow core structures.
To achieve these goals, according to the other side of the utility model embodiment, there is provided a kind of high
Power low profile helical antenna array, is arranged in array by N number of above-mentioned helical antenna and constitutes, N >=2.
Further, the array is rectangular array.
Further, the array is made up of i rows j row, and the helical antenna in same row is located at alternate each row, i × j respectively
=N.
Further, the array is annular array.
The beneficial effects of the utility model are the power capacities for further increasing antenna, and the axial direction for reducing antenna is long
Degree, realizes low profile.
The utility model is described further with reference to the accompanying drawings and detailed description.What the utility model was added
Aspect and advantage will be set forth in part in the description, and partly will become apparent from the description below, or pass through this practicality
New practice is recognized.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Embodiment, schematic description and description be used for explain the utility model, do not constitute to it is of the present utility model not
Work as restriction.In the accompanying drawings：
Fig. 1 is the schematic diagram of the utility model embodiment；
Fig. 2 is the top view of embodiment；
Fig. 3 is the antenna stereogram that reflection back of the body chamber exterior contour is square；
Fig. 4 is the magnetic distribution simulation result schematic diagram of embodiment helical antenna；
Fig. 5 is the reflectivity curve schematic diagram of embodiment helical antenna；
Fig. 6 is the two-dimensional directional figure of embodiment helical antenna；
Fig. 7 is the array schematic diagram that helical antenna is constituted；
Fig. 8 is the array schematic diagram that staggered helical antenna is constituted；
Fig. 9 is the annular array schematic diagram that helical antenna is constituted.
Embodiment
It should be noted that in the case where not conflicting, embodiment, embodiment in the application and therein
Feature can be mutually combined.Let us now refer to the figures and combine herein below and describe the utility model in detail.
In order that those skilled in the art are better understood from the utility model scheme, it is specific below in conjunction with the utility model
Accompanying drawing in embodiment, embodiment, clear to the technical scheme progress in the utility model embodiment, embodiment,
Complete description, it is clear that described embodiment is only the embodiment of the branch of the utility model one, rather than whole implementation
Example.Based on the embodiment in the utility model, embodiment, those of ordinary skill in the art are not making creative labor
Every other embodiment, the embodiment obtained on the premise of dynamic, should all belong to the scope of the utility model protection.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, this example high power low profile helical antenna includes coaxial waveguide 1, reflection back of the body chamber 2, spiral shell
Revolve body 3 and matching spheroid 4.The inner wire 10 and conveyor screw 3 of coaxial waveguide 1 are connected to orthogonal straight of matching spheroid 4 two
On footpath, and the axes O P of inner wire 10 of coaxial waveguide 1 is overlapped with the matching diameter of spheroid 4, as shown in Figure 1.Matching spheroid 4 is placed in together
The top of the inner wire 10 of axle waveguide 1, the ascent direction of conveyor screw 3 points to OP directions in the extended line direction of inner wire 10, i.e. Fig. 1.
The outer conductor 11 of coaxial waveguide 1 is connected with reflection back of the body chamber 2, and reflection back of the body chamber 2 is placed in the outer conductor 11 of coaxial waveguide 1 for cylinder
Top, the external diameter of 2 diameter ＞ coaxial waveguides of reflection back of the body chamber 1, the height h, i.e. reflection back of the body chamber 2 of reflection back of the body chamber 2 depth.Reflection back of the body chamber
2 diameter and height should be able to admit conveyor screw 3, or conveyor screw 3 is at least partially disposed in reflection back of the body chamber 2.
The helical antenna of this structure of this example, by coaxial waveguide 1, reflection back of the body chamber 2 and the physical dimension of conveyor screw 3 are set
Meter, it is possible to achieve to the matched well of input power, intercouples between reduction unit, improves antenna power capacity.Due to microwave
The complexity of transmission, particularly in the place of structural mutation, the inner wire 10 of such as coaxial waveguide 1 and the junction of conveyor screw 3, this
Utility model is carried out using matching spheroid 4 by the way of transition connection, advantageously reduces phase between the microwave reflection of junction and unit
Mutual coupling.The inner wire 10 and conveyor screw 3 of particularly coaxial waveguide 1 be connected to matching spheroid 4 two it is orthogonal diametrically,
And the axis of inner wire 10 of coaxial waveguide 1 is overlapped with the matching diameter of spheroid 4, reduce further the microwave reflection of low junction
Intercoupled between unit, improve antenna power capacity and performance.
In this example antenna, conveyor screw 3 is equal using two sections of line footpaths, and rotation direction is identical, the different helix connection of radius of turn
Constitute, the 3a and 3b seen in Fig. 1 and Fig. 2.3a is the inside spin being connected with matching spheroid, and 3b is the outer spiral shell being connected with inside spin
Rotation, general inside spin radius of turn is less than external spiral radius of turn.Here 4 diameters of matching spheroid >=spiral linear diameter, and spiral shell
Spin line diameter is equal with coaxial waveguide 1 inner wire, 10 diameters.
When this example operating frequency of antenna is 2.856GHz, antenna major parameter is as follows：
Coaxial waveguide internal and external conductor diameter is respectively 30mm and 7mm, and the diameter and height of cylindrical reflective back of the body chamber are respectively
56mm and 10mm, helix 3a radius of turn and the anglec of rotation are respectively 6.4mm and 127 °, end rise 2.1mm, helix
3b radius of turn is 17mm, and the anglec of rotation is 90 °, and end rise 8mm, the whole conveyor screw number of turns is 0.8 circle, conveyor screw line footpath
For 7.5mm.This example antenna is using the low number of turn (0.8 circle spiral) and the structure of fine pitch (only 4.5 ° of lead angle) so that antenna
Line footpath can be further increased to 0.07 wavelength, be conducive to the working condition of high-power input pattern, and spiral body portion
Although identical by two sections of rotation directions, the different helix of radius of turn is connected and composed, because two section spiral lines employ identical
Line footpath and identical lead angle, greatly reduce structural mutation, realize gentle transition and low profile.
By taking antenna shown in Fig. 3 as an example, Fig. 4 gives electromagnetic-field simulation result, at the operating frequencies, and surface maximum field is strong
Spend for 3510V/m, gain is about 7dB, axle ratio is 1.6dB.The reflectivity curve that Fig. 5 is provided shows, in 2.7~3GHz frequency band ranges
Interior, this example antenna reflection coefficient is less than 0.1.Antenna two-dimensional directional figure as shown in Figure 6 can be seen that this example antenna positive and negative
There is larger gain in the range of 75 °.
In view of the Kelvin effect of microwave current, the utility model conveyor screw 3, matching spheroid 4 are ensureing structural strength
Under the conditions of, hollow core structures can be made, to reduce antenna weights.
Another aspect of the present utility model is led to there is provided the aerial array that array is constituted is arranged in by above-mentioned helical antenna
Cross that multiple antennas are regularly arranged, battle array can be organized as aerial array and antenna list in High-Power Microwave occasion, array is applied to
The quantity of member can according to actual needs, and such as coverage, radiant power is selected.Fig. 7 shows a kind of equidistantly rule
36 mutually isostructural antenna elements are included in 6 × 6 rectangular arrays then arranged, array.What Fig. 8 was represented is a kind of close-packed arrays
Aerial array, array by 6 rows 6 row constitute, the helical antenna in same row respectively be located at alternate each row.It is this staggered
Array can arrange more antenna elements in the confined space, and antenna element distribution is more uniform, can improve antenna array
The power density and uniformity of radiation are arranged, is more suitable for HIGH-POWERED MICROWAVES transmitting field.
The aerial array that Fig. 9 is provided is annular array, is also a kind of compact arranged uniform layout's mode, same to have height
The characteristics of power density.
According to experimental data, using the array antenna of arrangement mode shown in Fig. 8, the surface maximum field after group battle array is about
4600V/m, according to vacuum breakdown threshold calculations, the design power capacity about 50MW of element antenna.
The above results show, high power low profile helical antenna of the present utility model, which has, reflects that small, power capacity is high, axle
To size it is short the characteristics of, be especially suitable for aerial array group battle array.
Claims (10)
1. high power low profile helical antenna, it is characterised in that including coaxial waveguide (1), reflection back of the body chamber (2), conveyor screw (3) and
Spheroid (4) is matched, inner wire (10) top of the coaxial waveguide (1) is connected with matching spheroid (4), the matching spheroid (4)
It is connected with conveyor screw (3), conveyor screw (3) ascent direction points to inner wire (10) extended line direction, the coaxial waveguide (1)
Outer conductor (11) be connected with reflection back of the body chamber (2), the reflection carries on the back chamber (2) and is placed in the top of coaxial waveguide (1) outer conductor (11),
Described reflection back of the body chamber (2) diameter ＞ coaxial waveguides (1) external diameter, the conveyor screw (3) is at least partially disposed in reflection back of the body chamber (2).
2. high power low profile helical antenna according to claim 1, it is characterised in that the coaxial waveguide (1) it is interior
Conductor (10) and conveyor screw (3) be connected to matching spheroid (4) two it is orthogonal diametrically, and coaxial waveguide (1) in lead
Body (10) axis is overlapped with matching spheroid (4) diameter.
3. high power low profile helical antenna according to claim 1, it is characterised in that the conveyor screw (3) is by two sections
Line footpath is equal, and rotation direction is identical, and the different helix of radius of turn is connected and composed.
4. high power low profile helical antenna according to claim 3, it is characterised in that the spiral linear diameter with it is coaxial
Inner wire (10) diameter of waveguide (1) is equal, described matching spheroid (4) diameter >=spiral linear diameter.
5. high power low profile helical antenna according to claim 4, it is characterised in that the spiral number of wire turns is 0.8,
Lead angle is 4.5 °.
6. high power low profile helical antenna according to claim 1, it is characterised in that the conveyor screw (3) and/or
It is hollow core structures with spheroid (4).
7. high power low profile helical antenna array, is arranged in array by N number of high power low profile helical antenna and constitutes, its feature
It is, the high power low profile helical antenna, including coaxial waveguide (1), reflection back of the body chamber (2), conveyor screw (3) and matching spheroid
(4), inner wire (10) top of the coaxial waveguide (1) is connected with matching spheroid (4), the matching spheroid (4) and conveyor screw
(3) connect, conveyor screw (3) ascent direction points to inner wire (10) extended line direction, the outer conductor of the coaxial waveguide (1)
(11) it is connected with reflection back of the body chamber (2), the reflection back of the body chamber (2) is placed in the top of coaxial waveguide (1) outer conductor (11), the reflection
Chamber (2) diameter ＞ coaxial waveguides (1) external diameter is carried on the back, the conveyor screw (3) is at least partially disposed in reflection back of the body chamber (2), wherein, N >=
2。
8. high power low profile helical antenna array according to claim 7, it is characterised in that the array is rectangle battle array
Row.
9. high power low profile helical antenna array according to claim 8, it is characterised in that the array is arranged by i rows j
Constitute, the helical antenna in same row is located at alternate each row, i × j=N respectively.
10. high power low profile helical antenna array according to claim 7, it is characterised in that the array is annular
Array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720182841.8U CN206595384U (en) | 2017-02-28 | 2017-02-28 | The aerial array of high power low profile helical antenna and its composition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720182841.8U CN206595384U (en) | 2017-02-28 | 2017-02-28 | The aerial array of high power low profile helical antenna and its composition |
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| CN206595384U true CN206595384U (en) | 2017-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069190A (en) * | 2017-02-28 | 2017-08-18 | 西南交通大学 | The aerial array of high power low profile helical antenna and its composition |
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2017
- 2017-02-28 CN CN201720182841.8U patent/CN206595384U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069190A (en) * | 2017-02-28 | 2017-08-18 | 西南交通大学 | The aerial array of high power low profile helical antenna and its composition |
| CN107069190B (en) * | 2017-02-28 | 2023-05-16 | 西南交通大学 | High-power low-profile helical antenna and antenna array formed by same |
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