CN203950910U - Novel miniaturization ultra broadband circular polarized antenna - Google Patents
Novel miniaturization ultra broadband circular polarized antenna Download PDFInfo
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- CN203950910U CN203950910U CN201420132154.1U CN201420132154U CN203950910U CN 203950910 U CN203950910 U CN 203950910U CN 201420132154 U CN201420132154 U CN 201420132154U CN 203950910 U CN203950910 U CN 203950910U
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- circular polarized
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- spiral
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Abstract
The utility model discloses Novel miniaturization ultra broadband circular polarized antenna, comprise planar equiangular spiral antenna part, Spherical Helical Antenna part, antenna feed Ba Lun and antenna-reflected cavity; The feed Ba Lun of antenna from antenna bottom through antenna-reflected cavity with the flat helical antenna part center of circle near spiral both arms top be connected.The utility model proposes the form combining with Spherical Helical Antenna with planar equiangular spiral antenna, this structure not only has the ability of broadening antenna low frequency bandwidth, also can realize the object of its miniaturization.This antenna works in the circular polarized antenna voltage standing wave(VSW) < 2 in whole frequency range in 800MHz-20GHz frequency band range, circular polarization degree (axial ratio)≤3dB, gain >=3dB, volume is little compared with same octave antenna, simple in structure, be easy to processing, be applicable to the field such as broadband connections, satellite communication.
Description
Technical field
The invention belongs to antenna technical field field, particularly a kind of Novel miniaturization ultra broadband circular polarized antenna.
Background technology
Along with the demand of the wireless system such as development and each frequency range communication of antenna theory technology, as a kind of receive and emitting electromagnetic wave visual plant-antenna just progressively develops to ultra broadband, miniaturization.Ultra broadband circular polarized antenna has many-sided broadband character, be that directional characteristic, impedance operator or polarization characteristic are all wide band, these characteristics make antenna have at aspects such as transmission rate, power consumption, fail safe, anti-multipath interference and ghost images the advantage of not replacing compared with other antennas.Therefore, obtain a wide range of applications in numerous applications such as Military Electronics system, ultra-wideband communications, satellite communications.
Existing ultra broadband circular polarized antenna is as Archimedian spiral antenna, equiangular spiral antenna, this class antenna form is single, and in the situation that determining frequency band, be difficult in traditional design size, be further implemented in the miniaturization on volume, and in actual needs, often given up the bandwidth (low frequency part) of antenna in order to reduce size.The form that the present invention adopts planar equiangular spiral antenna to combine with spheric helix first overcomes the above problems, and at high band, main energy is by snail partial radiation, and spherical helix loads as the end of snail; And in low-frequency range, snail part does not have enough electrical length to produce radiation, snail is now equal to a part for spherical helix, and concentration of energy is at spherical helix partial radiation.Large this problem of conventional helical antenna radial dimension in the time of low frequency operation has effectively been avoided in this design.Meanwhile, the bandwidth of antenna has also had very large broadening.
Summary of the invention
For addressing the above problem, the invention discloses Novel miniaturization ultra broadband circular polarized antenna.
For addressing the above problem, the method that the present invention adopts is: a kind of Novel miniaturization ultra broadband circular polarized antenna, comprises planar equiangular spiral antenna part, Spherical Helical Antenna part, antenna feed Ba Lun and antenna-reflected cavity; Planar equiangular spiral antenna part is made up of snail both arms; Spherical Helical Antenna part is made up of spherical medium and spiral copper cash: described planar equiangular spiral antenna is partly embedded in the spherical medium of described Spherical Helical Antenna part, and between the snail part of process planar equiangular spiral antenna part and spiral copper coin, the transition of quarter turn welds together; The feed Ba Lun of described antenna from antenna bottom through antenna-reflected cavity with the flat helical antenna part center of circle near spiral both arms top be connected.
As a modification of the present invention, the helix of the described snail both arms wherein polar coordinates expression-form of an arm equation is
wherein
for helix start radius,
for helix outer radius,
for helix inside radius,
for spiral rate, other arm arm Rotate 180 ° and obtaining thus.
As a modification of the present invention, the rectangular equation of described spheric helix is:
, wherein
for the radius of a ball, N represents the number of turns of helix.
As a modification of the present invention, the equation form of described antenna feed Ba Lun is
,
,
be respectively the width of that end that Ba Lun balance end size is little,
for the relevant constant of width of that large end of non-equilibrium end size,
for index fade rate,
for the length of Ba Lun.
As a modification of the present invention, described antenna-reflected cavity is aluminum conical camber.
As a modification of the present invention, be welded with sub-miniature A connector in the feed Ba Lun of described antenna part, and have bottom in reflection chamber bottom envelope.
Beneficial effect:
The present invention proposes the form combining with Spherical Helical Antenna with planar equiangular spiral antenna, and this structure not only has the ability of broadening antenna low frequency bandwidth, also can realize the object of its miniaturization.This antenna works in the circular polarized antenna voltage standing wave(VSW) < 2 in whole frequency range in 800Mhz-20Ghz frequency band range, circular polarization degree (axial ratio)≤3dB, gain >=3dB, volume is little compared with same octave antenna, simple in structure, be easy to processing, be applicable to the field such as broadband connections, satellite communication.
Brief description of the drawings
Fig. 1 is ultra broadband circular polarized antenna snail structural representation.
Fig. 2 is ultra broadband circular polarized antenna spherical helix structural representation.
Fig. 3 is ultra broadband circular polarized antenna feed structure schematic diagram.
Fig. 4 is ultra broadband circular polarized antenna cutaway view.
Fig. 5 is ultra broadband circular polarized antenna outline drawing.
Fig. 6 is ultra broadband circular polarized antenna snail calculating chart.
Fig. 7 is the voltage standing wave ratio curve chart of this circular polarized antenna.
Fig. 8 is circular polarization degree (axial ratio) curve chart of this ultra broadband circular polarized antenna.
Fig. 9 is the gain curve figure of this ultra broadband circular polarized antenna.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand following embodiment and only be not used in and limit the scope of the invention for the present invention is described.It should be noted that, word 'fornt', 'back', " left side ", " right side ", "up" and "down" that use is described below refer to the direction in accompanying drawing, and word " interior " and " outward " refer to respectively the direction towards or away from specific features geometric center.
Novel miniaturization ultra broadband circular polarized antenna as described in Figure 4, comprises planar equiangular spiral antenna part, Spherical Helical Antenna part, antenna feed Ba Lun and antenna-reflected cavity.Described planar equiangular spiral antenna is partly embedded in the spherical medium of described Spherical Helical Antenna part, welds together, as shown in Figure 5 through the transition of quarter turn between planar equiangular spiral antenna part snail part and spiral copper coin.The feed Ba Lun of described antenna from antenna bottom through antenna-reflected cavity with the flat helical antenna part center of circle near spiral both arms top be connected.
As shown in Fig. 1 and Fig. 6, be ultra broadband circular polarized antenna snail structural representation and size calculating chart, planar equiangular spiral antenna part is to calculate to obtain size by equiangular spiral equation, after on the circular medium substrate that covers copper laser engraving obtain.Plane equiangular spiral part is made up of snail both arms; Its helix wherein polar coordinates expression-form of an arm equation is
wherein
for helix start radius,
for helix outer radius,
for helix inside radius,
for spiral rate.An other arm can have this arm Rotate 180 ° to draw, therefore its equation is
.
generally get
, now antenna is from complementary structure, and the space between antenna two arms is identical with the shape of arm, and now the symmetry of antenna is best.
The maximum radius of planar equiangular spiral antenna
by the wavelength of lowest operating frequency
determine, generally get
, frequency that antenna will be worked is lower just must larger radial dimension; The least radius of antenna
by the wavelength of maximum operating frequency
determine, generally get
, frequency that antenna will be worked is higher just must less initial radium.But to take into account the full-size of antenna simultaneously and can processedly decide when design
,
size.
Be illustrated in figure 2 ultra broadband circular polarized antenna spherical helix structural representation.Spherical Helical Antenna part is made up of spherical medium and spiral copper cash: first at spherical medium surface engraving spiral circular groove, in rear winding with the copper cash of circular groove with diameter.
Spherical Helical Antenna part is made up of spherical medium and spiral copper cash.The rectangular equation of spheric helix is:
, wherein
for the radius of a ball, N represents the number of turns of helix.Spherical helix is as the loading section of snail, and its Main Function is the radial dimension when reducing flat helical antenna and being operated in low frequency.The concrete size of spherical helix is mainly to determine according to emulation experiment.
Fig. 3 is ultra broadband circular polarized antenna feed structure schematic diagram, and feed Ba Lun mainly plays unbalanced feed-the effect of balanced feeding transition, impedance transformation.Antenna feed Ba Lun is by carving micro-band transition line gained on bilayer copper clad dielectric-slab.
Feed Ba Lun is index gradual change form, and its Main Function is for realizing transition of mechanical impedance and balance-nonequilibrium conversion.Its equation form is
,
,
be respectively the width (that end that size is little) of Ba Lun balance end,
for the relevant constant of non-equilibrium end width (that end that size is large),
for index fade rate,
for the length of Ba Lun.
Further, antenna-reflected cavity is aluminum conical camber, and snail circular polarized antenna belongs to bidirectional radiation class antenna, and antenna below is added reflection chamber 4 and realized its one-way radiation, thereby improves antenna efficiency.
Further, be welded with sub-miniature A connector in the feed part of described antenna, and have bottom in reflection chamber bottom envelope, can improve like this stability and the useful life of antenna.
Fig. 7 is the voltage standing wave ratio curve chart of this circular polarized antenna.As seen from Figure 7 this antenna at whole frequency band standing internal wave than being all less than 2.
Fig. 8 is circular polarization degree (axial ratio) curve chart of this ultra broadband circular polarized antenna.This antenna axial ratio in working band is less than 3dB substantially as seen from Figure 8, realizes circular polarization.
Fig. 9 is the gain curve figure of this ultra broadband circular polarized antenna.This antenna gains and is substantially greater than 3dB in working band as seen from Figure 9.
The concrete manufacturing process of miniature ultra wide band circular polarized antenna of the present invention comprises the steps:
The first step: with reference to Fig. 1, covering laser engraving equiangular spiral antenna part on the circular medium of copper (or other good conducting metal); With reference to Fig. 2, at spherical medium surface engraving spiral circular groove, in rear winding with the copper cash (or other good conductive metal wire) of circular groove with diameter.
Second step: with reference to Fig. 5, snail part is nested in sphere medium, welds together through the transition of quarter turn between snail part and spiral copper coin.
The 3rd step: with reference to Fig. 4, the feed Ba Lun of antenna from antenna bottom through the taper reflection chamber of antenna with the snail part center of circle near spiral both arms top be connected.
The 4th step: the upper sub-miniature A connector of feed part welding of antenna, seal up bottom.
The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned technological means, also comprises the technical scheme being made up of above technical characterictic combination in any.The above is the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (6)
1. a Novel miniaturization ultra broadband circular polarized antenna, is characterized in that: comprise planar equiangular spiral antenna part, Spherical Helical Antenna part, antenna feed Ba Lun and antenna-reflected cavity; Planar equiangular spiral antenna part is made up of snail both arms; Spherical Helical Antenna part is made up of spherical medium and spiral copper cash: described planar equiangular spiral antenna is partly embedded in the spherical medium of described Spherical Helical Antenna part, and between the snail part of process planar equiangular spiral antenna part and spiral copper coin, the transition of quarter turn welds together; The feed Ba Lun of described antenna from antenna bottom through antenna-reflected cavity with the flat helical antenna part center of circle near spiral both arms top be connected.
2. Novel miniaturization ultra broadband circular polarized antenna according to claim 1, is characterized in that: the helix of the described snail both arms wherein polar coordinates expression-form of an arm equation is
wherein
for helix start radius,
for helix outer radius,
for helix inside radius,
for spiral rate, other arm arm Rotate 180 ° and obtaining thus.
3. Novel miniaturization ultra broadband circular polarized antenna according to claim 1, is characterized in that: the rectangular equation of described spheric helix is:
, wherein
for the radius of a ball, N represents the number of turns of helix.
4. Novel miniaturization ultra broadband circular polarized antenna according to claim 1, is characterized in that: the equation form of described antenna feed Ba Lun is
,
,
be respectively the width of that end that Ba Lun balance end size is little,
for the relevant constant of width of that large end of non-equilibrium end size,
for index fade rate,
for the length of Ba Lun.
5. Novel miniaturization ultra broadband circular polarized antenna according to claim 1, is characterized in that: described antenna-reflected cavity is aluminum conical camber.
6. Novel miniaturization ultra broadband circular polarized antenna according to claim 1, is characterized in that: the feed part at the feed Ba Lun of described antenna part and antenna-reflected cavity composition is welded with sub-miniature A connector, and has bottom in reflection chamber bottom envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132154.1U CN203950910U (en) | 2014-03-24 | 2014-03-24 | Novel miniaturization ultra broadband circular polarized antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132154.1U CN203950910U (en) | 2014-03-24 | 2014-03-24 | Novel miniaturization ultra broadband circular polarized antenna |
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|---|---|
| CN203950910U true CN203950910U (en) | 2014-11-19 |
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| CN201420132154.1U Expired - Fee Related CN203950910U (en) | 2014-03-24 | 2014-03-24 | Novel miniaturization ultra broadband circular polarized antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112898A (en) * | 2014-03-24 | 2014-10-22 | 南京信息工程大学 | Novel miniature ultra-wideband circularly polarized antenna |
| CN109742502A (en) * | 2019-03-13 | 2019-05-10 | 南京邮电大学 | A kind of unit artificial surface plasmon transmission line based on helical structure |
-
2014
- 2014-03-24 CN CN201420132154.1U patent/CN203950910U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112898A (en) * | 2014-03-24 | 2014-10-22 | 南京信息工程大学 | Novel miniature ultra-wideband circularly polarized antenna |
| CN104112898B (en) * | 2014-03-24 | 2017-02-01 | 南京信息工程大学 | Novel miniature ultra-wideband circularly polarized antenna |
| CN109742502A (en) * | 2019-03-13 | 2019-05-10 | 南京邮电大学 | A kind of unit artificial surface plasmon transmission line based on helical structure |
| CN109742502B (en) * | 2019-03-13 | 2021-07-06 | 南京邮电大学 | Unit artificial surface plasmon transmission line based on spiral structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20160324 |