CN208820053U - A kind of ultra wide band Archimedian screw array antenna - Google Patents
A kind of ultra wide band Archimedian screw array antenna Download PDFInfo
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- CN208820053U CN208820053U CN201821829962.8U CN201821829962U CN208820053U CN 208820053 U CN208820053 U CN 208820053U CN 201821829962 U CN201821829962 U CN 201821829962U CN 208820053 U CN208820053 U CN 208820053U
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- wide band
- archimedian
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Abstract
The utility model provides a kind of ultra wide band Archimedian screw array antenna, it includes bay, each bay includes feed element and flat helical antenna, feed element is connected to the axis of flat helical antenna, feed element is orthogonal with flat helical antenna coaxial line, any one side positioned at feed element is equipped with balun band, it is corresponding on the another side of feed element respectively to etch a column photonic crystal along balun two sides, balun band top is opposite with flat helical antenna center, using new E BG structure, to achieve the purpose that miniaturization, novel balun feed structure is suitable for ultra wide band helical antenna, Archimedian spiral antenna is balanced, symmetrical structure, its feed system should also use balanced feeding mode, coaxial line is traditional ultra wide band feed line.
Description
Technical field
The utility model relates to one of field of satellite navigation ultra wide band Archimedian screw array antennas.
Background technique
Antenna is very universal in military and business telecommunication technical field broadband application at present, and broad-band antenna is received for antenna
For the relative bandwidth of signalling, the referred to as narrowband when the ratio between signal bandwidth and centre frequency are less than 1%, bandwidth and center frequency
The ratio between rate is known as broadband between 1% and 25%, and the ratio between bandwidth and centre frequency are 25% referred above to ultra wide band.Archimedes
Helical antenna has non-frequency dependent characteristic as a kind of broad-band antenna.Archimedian spiral antenna design aspect there are the problem of master
If the feed and mating structure design and realization in superwide range are relatively difficult, it is difficult to guarantee in superwide range
Antenna directivity, impedance operator, the substantially constant of axis ratio characteristic and smaller fluctuating, in addition, antenna backward radiation inhibitory effect is not
It is good, cause efficiency lower.
Utility model content
The purpose of this utility model is design for the characteristics of in the prior art, gain range is less, deficient in stability, and
A kind of ultra wide band Archimedian screw array antenna is provided, high balanced, symmetrical architectural characteristic is realized.
The technical solution of offer are as follows:
Provide a kind of ultra wide band Archimedian screw array antenna comprising bay a, each bay wrap
Feed element 1 and flat helical antenna 2 are included, feed element is connected to the axis of flat helical antenna, feed element and plane spiral shell
It is orthogonal to revolve antenna coaxial line；
It is equipped with balun band 1b positioned at any one side of feed element, it is corresponding on the another side of feed element
Respectively etch a column photon crystal 1 a along balun two sides, balun band top is opposite with flat helical antenna center.
Further, the flat helical antenna includes antenna floor 3 and Archimedian spiral antenna 2a, Archimedes
Helical antenna is floated in parallel above antenna floor, is insulated between Archimedian spiral antenna and antenna floor, the balun band
Top and Archimedian spiral antenna are electrically connected.
Further, it is formed on antenna floor by the ultra-wide zone face of multiple EBG structures successively arranged adjacent.
Further, the staggered F shape wave arrestment portion that the EBG structure overturns 180 degree by two forms.
Further, the Archimedian spiral antenna and antenna floor gaps are arranged, Archimedian spiral antenna with
There are air layers between antenna floor.
Further, the number of the bay is multiple, the equidistant plane distribution of mutiple antennas array element, Mei Getian
Linear array member is used to reduce the FSS structure b coupled between array element with being designed with one between adjacent bay.
Further, the FSS structure is turned over the opposite anti-coupling part of i shape of the head and the tail turning 90 degrees by four and is formed.
The utility model has advantageous effect in that in terms of existing technologies:
1. Archimedian spiral antenna is balanced, symmetrical structure, feed system should also use balanced feeding mode, coaxially
Line is traditional ultra wide band feed line, has good broadband character, but its feeding classification is unbalanced feed, so just needing
Increase corresponding unbalanced feed to the conversion circuit of balanced feeding, i.e. balun.
2. since the input impedance of helical antenna and the characteristic impedance of feeding coaxial lines are different, balun also to realize input,
The transformation of output impedance.Therefore, which uses balun feed.The feed section of plane Archimedean spiral antenna uses Gao Jie
Permittivity media plate and 1-D photon crystal devise low section exponential fade photonic crystal balun impedance transition mechanism device, one-dimensional
Photonic crystal engraves regular hexagon by the way of hollow out.
3. optimizing the radiation characteristic of antenna using innovative structure type；
New E BG structure is used on reflection cavity earth plate, to achieve the purpose that miniaturization, while having ultra wide band special
Property, height reduces 90% or more compared with the traditional Archimedian spiral antenna in similar frequency bands that works；
4. broadband may be implemented in the new structure on floor, it can be used for all kinds of broad-band antenna units；
5. novel balun feed structure is suitable for ultra wide band helical antenna；
6. using novel FSS structure to reduce the coupling between array element between Archimedian screw array antenna unit, change
Kind isolation；Novel FSS structure can carry out the optimization such as width, length of specific parameters for specific working frequency
Degree, distance interval etc., to meet required working frequency；
7. the utility model realizes that structure is simple, easy to process using PCB printed circuit board technology；
8. micro-strip transition line balun realizes coaxial line imbalance and feeds the conversion to the balanced feeding of helical antenna；
9. Archimedian spiral antenna generates positive and backward radiation, in order to make Archimedian spiral antenna generate unidirectional spoke
It penetrates, needs with reflecting plate or reflection cavity, traditional metal reflection cavity height is generally quarter-wave, to make antenna
Radiation efficiency highest.The section of antenna system is not only increased, and limits the working frequency of antenna.And use EBG structure
When floor as antenna, the height of antenna can be greatly reduced, realizes that section is small-sized by antenna close to the surface for arriving floor
Change, not only saves antenna occupied space, moreover it is possible to improve the radiance of antenna.
10. when ultra wide band Archimedian screw group battle array, array characteristics are usually because the mutual coupling between array antenna unit makes
It obtains array characteristics to change, when especially cell spacing is closer, coupling is even more that can not ignore, inter-element mutual coupling
In the presence of so that Aperture distribution, input impedance, the antenna pattern of array change.The Archimedian screw battle array of the utility model
Novel FSS structure is used between array antenna unit to reduce the coupling between array element, improves isolation；Novel FSS structure can be with
The optimization such as width, length, distance interval etc. of specific parameters is carried out for specific working frequency, needed for satisfaction
Working frequency；It can be seen that the directional diagram using element antenna after novel FSS structure from the directional diagram of element antenna in attached drawing
It is very regular, by the mutual coupling very little between unit, maintain the good radiation characteristic of ultra wide band Archimedian spiral antenna；
Detailed description of the invention
Fig. 1 is new E BG bay structure chart；
Fig. 2 is that photonic crystal loads balun feed unit facing structure figure；
Fig. 3 photonic crystal loads balun feed unit backsight structure chart；
Fig. 4 is the composition figure of novel FSS structure；
Fig. 5 is element antenna directional diagram；
Fig. 6 is element antenna directional diagram；
Fig. 7 is antenna element side view；
Description of symbols:
Bay a, FSS structure b, feed element 1, flat helical antenna 2, balun band 1b, photon crystal 1 a, A Ji
Mead helical antenna 2a, antenna floor 3.
Specific embodiment
As shown in Figure 3-4, a kind of ultra wide band Archimedian screw array antenna, including bay a, the antenna array
The number of member is multiple, the equidistant plane distribution of mutiple antennas array element, between each bay and adjacent bay
Equipped with one for reducing the FSS structure b coupled between array element, the FSS structure turns over the opposite i of the head and the tail turning 90 degrees by four
The anti-coupling part composition of shape.
As shown in Figs. 1-2, each bay includes feed element 1 and flat helical antenna 2, feed element connection
To the axis of flat helical antenna, feed element is orthogonal with flat helical antenna coaxial line, positioned at any side of feed element
Face is equipped with balun band 1b, and two output amplitudes of balun band are equal, opposite in phase, the phase on the another side of feed element
Corresponding respectively to etch a column photon crystal 1 a along balun two sides, balun band top is opposite with flat helical antenna center.
The flat helical antenna includes antenna floor 3 and Archimedian spiral antenna 2a, Archimedian spiral antenna
Floated on above antenna floor in parallel, insulated between Archimedian spiral antenna and antenna floor, the top of the balun band and Ah
Base Mead helical antenna is electrically connected.
It is formed as shown in Figure 1, being located on antenna floor by the ultra-wide zone face of multiple EBG structures successively arranged adjacent, it is described
EBG structure by two overturn 180 degrees staggered F shape wave arrestment portion form.
Balun band is trapezium structure, and balun band and photonic crystal are located at the two sides of feed element.
Short-circuit in order to prevent, the Archimedian spiral antenna and antenna floor gaps is arranged, Archimedian screw day
There are air layers between line and antenna floor.
A termination signal input part of feed element, the other end are connected with spiral arm in use, and microwave signal is logical
Microstrip balun feed-in spiral antenna arms are crossed, so that Archimedian spiral antenna generates one-way radiation, it is single that photonic crystal improves feed
First impedance, for FSS structure to reduce the coupling between array element, EBG structure is also possible that antenna while improving radiance
Unit small-sized.
Claims (7)
1. a kind of ultra wide band Archimedian screw array antenna, it is characterised in that: including bay (a), each bay
It all include that feed element (1) and flat helical antenna (2), feed element are connected to the axis of flat helical antenna, feed element
It is orthogonal with flat helical antenna coaxial line；
Any one side positioned at feed element is equipped with balun band (1b), corresponding on the another side of feed element
A column photonic crystal (1a) is respectively etched along balun two sides, balun band top is opposite with flat helical antenna center.
2. a kind of ultra wide band Archimedian screw array antenna according to claim 1, it is characterised in that: the plane
Helical antenna includes antenna floor (3) and Archimedian spiral antenna (2a), and Archimedian spiral antenna with floating on antenna in parallel
Above plate, insulate between Archimedian spiral antenna and antenna floor, the top of the balun band and Archimedian spiral antenna
It is electrically connected.
3. a kind of ultra wide band Archimedian screw array antenna according to claim 2, it is characterised in that: positioned at antenna
It is formed on plate by the ultra-wide zone face of multiple EBG structures successively arranged adjacent.
4. a kind of ultra wide band Archimedian screw array antenna according to claim 3, it is characterised in that: the EBG
The staggered F shape wave arrestment portion that structure overturns 180 degree by two forms.
5. a kind of ultra wide band Archimedian screw array antenna according to claim 2, it is characterised in that: the A Ji
Mead helical antenna and antenna floor gaps are arranged, and there are air layers between Archimedian spiral antenna and antenna floor.
6. a kind of ultra wide band Archimedian screw array antenna according to claim 4, it is characterised in that: the antenna
The number of array element is multiple, the equidistant plane distribution of mutiple antennas array element, between each bay and adjacent bay
One is designed with for reducing the FSS structure (b) coupled between array element.
7. a kind of ultra wide band Archimedian screw array antenna according to claim 6, it is characterised in that: the FSS
Structure is turned over the opposite anti-coupling part of i shape of the head and the tail turning 90 degrees by four and is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829962.8U CN208820053U (en) | 2018-11-07 | 2018-11-07 | A kind of ultra wide band Archimedian screw array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829962.8U CN208820053U (en) | 2018-11-07 | 2018-11-07 | A kind of ultra wide band Archimedian screw array antenna |
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| Publication Number | Publication Date |
|---|---|
| CN208820053U true CN208820053U (en) | 2019-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821829962.8U Active CN208820053U (en) | 2018-11-07 | 2018-11-07 | A kind of ultra wide band Archimedian screw array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244660A (en) * | 2018-11-07 | 2019-01-18 | 中国电子科技集团公司第五十四研究所 | A kind of ultra wide band Archimedian screw array antenna |
-
2018
- 2018-11-07 CN CN201821829962.8U patent/CN208820053U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244660A (en) * | 2018-11-07 | 2019-01-18 | 中国电子科技集团公司第五十四研究所 | A kind of ultra wide band Archimedian screw array antenna |
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