CN204760543U - Knife -edge broadband horizontal polarisation omnidirectional antenna - Google Patents
Knife -edge broadband horizontal polarisation omnidirectional antenna Download PDFInfo
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- CN204760543U CN204760543U CN201520403293.8U CN201520403293U CN204760543U CN 204760543 U CN204760543 U CN 204760543U CN 201520403293 U CN201520403293 U CN 201520403293U CN 204760543 U CN204760543 U CN 204760543U
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Abstract
The utility model discloses a knife -edge broadband horizontal polarisation omnidirectional antenna, including antenna radiation unit and feed unit, the antenna is encapsulated in the antenna house, and the antenna house is the knife -edge structure, the antenna radiation unit includes bore face open -ended rectangular horn, the feed unit is located the central authorities of antenna radiation unit vertical direction, the feed unit specifically is gradual change form metal paster. The utility model discloses the gap that relies on horn mouth diametral plane opening to form produces the radiation to good omni -direction all has on whole frequency band. The utility model discloses antenna structure is simple novel, the size is less and the directional diagram is stable, omni -direction is good, cross polarization is little, the bandwidth is wide, the high advantage that gains, is applicable to the mobile communication field.
Description
Technical field
The utility model relates to moving communicating field, particularly a kind of knife-edge broadband horizontal polarization omnidirectional antenna.
Background technology
Along with the development of society, the progress of science and technology, radio communication plays more and more important effect in people's life, and antenna have also been obtained develop rapidly as part requisite in radio communication.One side various wireless communication standard system is also deposited, and for meeting the requirement of radio system multiband, antenna needs to have broadband character.Broad-band antenna can not only meet the demand that high speed information degree a large amount of between men transmits, and common antenna can be made to work in multiple communication system frequency range, thus reduces the number of antenna on carrier, realizes the miniaturization of communication equipment
Horizontally polarized omnidirectional antenna refers to and realize 360 degree of homogeneous radiations in horizontal plane, the antenna of certain beamwidth is had in vertical plane, therefore its signal launched can be received by the receiving terminal of horizontal plane arbitrary orientation, can receive the signal of all directions of horizontal plane, general application covers, in point-to-multipoint communication system on a large scale in a communications system simultaneously.In daily life, omnidirectional antenna has been widely used in the occasions such as mobile communication, radio-frequency (RF) identification, Channel Detection; Militarily, omnidirectional antenna is also widely used in fields such as satellite communication, radar sensor networks, spacecrafts.
Commonly in omnidirectional antenna be mostly perpendicular polarization form, horizontal polarization few.Due to the electromagnetic wave of horizontally-polarized antenna radiation and perpendicular polarization electromagnetic wave mutually orthogonal, farthest can reduce disturbing mutually between the electromagnetic wave of perpendicular polarization mode work, thus user can be made to obtain more clean radio signal.According to the study, in indoor Radio Communication System, transmitting terminal and receiving terminal all adopt the system of horizontally-polarized antenna can the power of the average 10dB of many acquisitions than the system adopting vertical polarized antenna.
Utility model content
In order to overcome the shortcoming of prior art existence with not enough, the utility model provides a kind of knife-edge broadband horizontal polarization omnidirectional antenna.
The utility model adopts following technical scheme:
A kind of knife-edge broadband horizontal polarization omnidirectional antenna, comprise radome, described antenna is encapsulated in radome, described antenna comprises antenna radiation unit and feed element, described antenna radiation unit is the rectangular horn of a bore face opening, and described feed element is positioned at the central authorities of antenna radiation unit vertical direction.
Described feed element is gradual change form metal patch, and gradual change form is specially elliptical gradient, circular gradual change or parabolic grades, the left surface of the rectangular horn that this metal patch is nearest with it or the distance gradual change change of right flank.
Described radome is knife-edge structure, the knife back face of described knife-edge structure and the bore face of rectangular horn coplanar, the cutter backside openings of described knife-edge structure.
The bore face length of described rectangular horn is wide is respectively 0.5 λ
o-1.5 λ
o, 0.05 λ
o-0.5 λ
o, the length and width in the face relative with bore face are respectively 0.5 λ
o-1.5 λ
o, 0.05 λ
o-0.45 λ
o, the degree of depth of rectangular horn is 0.1 λ
o-0.5 λ
o, wherein λ
ofor the wavelength of the corresponding free space in this center of antenna resonance frequency place.
The line length of described gradual change form metal patch is 0.1 λ
o-0.5 λ
o, live width is 0.05 λ
o-0.15 λ
o, wherein λ
ofor the wavelength of the corresponding free space in this center of antenna resonance frequency place.
Described gradual change form metal patch is near one end, bore face open circuit, and other end mid point is connected with 50 ohm coaxial lines.
The beneficial effects of the utility model:
(1) structure of this antenna is simply novel; its radome part is the fairshaped knife-edge structure adopting fiberglass reinforced plastics to make; can well antenna radiator be protected, adopt fairshaped knife structure can reduce windage in-flight at aircraft system.
(2) radiant body of this antenna is a rectangular horn, structure is simply novel, and the gap that its bore face opening is formed is the key realizing horizontal polarization omnidirectional radiation, and the radiant body of loudspeaker form can obtain higher far-field radiation gain, the length in this gap and the omnidirectional performance of wide meeting on antenna is regulated to affect to some extent.
(3) feeding line portion of this antenna, structure is simply novel, and radiant body can be coordinated to realize wider return loss bandwidth.
(4) radiating element only used by this antenna, just can realize broadband and cover, and can obtain good antenna pattern in whole frequency range, have good horizontal polarization omnidirectional performance, and cross polarization be very little, all below-35dB;
(5) relative size of this antenna is little, and structure is simple, is only made up of two parts, is convenient to machine-shaping;
(6) gain of traditional omnidirectional antenna is generally on the low side, and the maximum gain of this antenna can reach 5dB, and the feeding classification of this antenna is simple, novel, and this feeding network only has an impact to the impedance operator of antenna, affects hardly omnidirectional's characteristic of antenna.And achieving the impedance matching in broadband, the return loss of 10dB can reach 35.5%.
Accompanying drawing explanation
Fig. 1 is the stereogram after the encapsulation of the utility model knife-edge broadband horizontal polarization omnidirectional antenna;
Fig. 2 is the stereogram before the encapsulation of the utility model knife-edge broadband horizontal polarization omnidirectional antenna;
Fig. 3 is the vertical view before the encapsulation of the utility model knife-edge broadband horizontal polarization omnidirectional antenna;
Fig. 4 is the return loss plot before the encapsulation of the utility model knife-edge broadband horizontal polarization omnidirectional antenna;
Fig. 5 is the antenna pattern of the utility model in the XOY plane at 1.373GHz place;
Fig. 6 is the antenna pattern of the utility model in the XOY plane at 1.67GHz place;
Fig. 7 is the antenna pattern of the utility model in the XOY plane at 1.965GHz place.
Shown in figure:
K-radome, R-rectangular horn, S-50 ohm coaxial line, M-feed element.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, a kind of knife-edge broadband horizontal polarization omnidirectional antenna, comprise radome K, described radome is a kind of fairshaped knife-edge structure adopting fiberglass reinforced plastics to make, adopt fairshaped knife-edge structure can reduce windage in the process of flight, whole antenna is positioned at radome inside, described antenna comprises antenna radiation unit and feed element M, described antenna radiation unit is the rectangular horn R of a bore face opening, the cutter backside openings of described knife-edge structure, be conducive to radiation, bore face and the knife back face of rectangular horn R are coplanar.
In the present embodiment, the rectangular horn of bore face opening realizes good horizontal polarization omnidirectional radiation directional diagram, and loudspeaker form can realize higher gain, and highest-gain can reach 5dB.Fig. 2 is the stereogram of whole antenna, and ABCD face is the bore face of rectangular horn, and the length and width in bore face are respectively AC, AB, is respectively 0.67 λ
o, 0.21 λ
o.The length and width in the face relative with bore face is respectively GF, GH, and its length is respectively 0.67 λ
o, 0.17 λ
o, wherein λ
othe wavelength of free space corresponding to this center of antenna resonance frequency 1.67GHz.
Fig. 3 is the vertical view of antenna, and the degree of depth of rectangular horn is L, L is 0.33 λ
o, ABGH face is the upper surface of rectangular horn, and feed position in the central authorities in the face relative with horn mouth diametric plane, and is 2mm with the distance on the EH limit of rectangular horn; Described feed element M is specially gradual change form metal patch, and gradual change form is specially elliptical gradient, circular gradual change or parabolic grades.The left surface of the rectangular horn that this metal patch is nearest with it or the distance gradual change change of right flank.Elliptical form graded metal paster is adopted in the present embodiment, its material is copper, and be the gradual change form metal patch of 1/4 ellipse just, its with the O in Fig. 2 for the center of circle, major axis is in X-axis, minor axis is in Y-axis, and the lucky for this reason oval minor axis of the horizontal range of center of circle O and distributing point is long, oval major axis is 58mm, the oval long 22mm of minor axis, the live width MW of this shape as 1/4 elliptical gradient form metal patch is 16mm, and the width of live width on this broad-band antenna impedance bandwidth of this 1/4 elliptical gradient form metal patch has larger impact.
In the present embodiment, open a way near the bore face of rectangular horn in elliptical gradient form metal patch one end, the opposite face distance 2mm in the other end and bore face, and the mid point of its other end is distributing point and is connected with 50 ohm coaxial line S, carries out feed to it.
The combination of this shape as the gradual change of elliptical gradient form metal patch and loudspeaker form can realize wider and good return loss bandwidth, as shown in Figure 4.Whole feed element is positioned at the middle position of radiant body rectangular horn, and regulate the omnidirectional radiation performance impact of parameter to antenna of feed part little, the gap that the horizontal polarization omnidirectional radiation performance of this antenna mainly relies on the bore face of loudspeaker to be formed, and this antenna all has good horizontal polarization omnidirectional radiation characteristic in whole frequency range, as shown in Fig. 5, Fig. 6, Fig. 7.
Above-described embodiment is the utility model preferably execution mode; but execution mode of the present utility model is not limited by the examples; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection range of the present utility model.
Claims (6)
1. a knife-edge broadband horizontal polarization omnidirectional antenna, comprise radome, antenna is encapsulated in radome, described antenna comprises antenna radiation unit and feed element, it is characterized in that, described antenna radiation unit is the rectangular horn of a bore face opening, and described feed element is positioned at antenna radiation unit, and is positioned at the central authorities of its vertical direction.
2. antenna according to claim 1, is characterized in that, described feed element is specially gradual change form metal patch, and gradual change form is specially elliptical gradient, circular gradual change or parabolic grades.
3. antenna according to claim 1, is characterized in that, described radome is knife-edge structure.
4. antenna according to claim 1, is characterized in that, the bore face length of described rectangular horn is wide is respectively 0.5 λ
o-1.5 λ
o, 0.05 λ
o-0.5 λ
o, the length and width in the face relative with bore face are respectively 0.5 λ
o-1.5 λ
o, 0.05 λ
o-0.45 λ
o, the degree of depth of rectangular horn is 0.1 λ
o-0.5 λ
o, wherein λ
ofor the wavelength of the corresponding free space in this center of antenna resonance frequency place.
5. antenna according to claim 2, is characterized in that, the line length of described gradual change form metal patch is 0.1 λ
o-0.5 λ
o, live width is 0.05 λ
o-0.15 λ
o, wherein λ
ofor the wavelength of the corresponding free space in this center of antenna resonance frequency place.
6. antenna according to claim 2, is characterized in that, described gradual change form metal patch is near one end, bore face open circuit, and other end mid point is connected with 50 ohm coaxial lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520403293.8U CN204760543U (en) | 2015-06-11 | 2015-06-11 | Knife -edge broadband horizontal polarisation omnidirectional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520403293.8U CN204760543U (en) | 2015-06-11 | 2015-06-11 | Knife -edge broadband horizontal polarisation omnidirectional antenna |
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| Publication Number | Publication Date |
|---|---|
| CN204760543U true CN204760543U (en) | 2015-11-11 |
Family
ID=54475222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520403293.8U Expired - Fee Related CN204760543U (en) | 2015-06-11 | 2015-06-11 | Knife -edge broadband horizontal polarisation omnidirectional antenna |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916914A (en) * | 2015-06-11 | 2015-09-16 | 华南理工大学 | Blade wide-band horizontally-polarized omnidirectional antenna |
-
2015
- 2015-06-11 CN CN201520403293.8U patent/CN204760543U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916914A (en) * | 2015-06-11 | 2015-09-16 | 华南理工大学 | Blade wide-band horizontally-polarized omnidirectional antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |