CN210668672U - Antenna element and dual-polarized directional antenna - Google Patents
Antenna element and dual-polarized directional antenna Download PDFInfo
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- CN210668672U CN210668672U CN201921748590.0U CN201921748590U CN210668672U CN 210668672 U CN210668672 U CN 210668672U CN 201921748590 U CN201921748590 U CN 201921748590U CN 210668672 U CN210668672 U CN 210668672U
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Abstract
The utility model discloses an antenna element and by dual polarization directional antenna that two antenna elements are constituteed, this antenna element include a plurality of oscillator arms, each the oscillator arm includes flaky oscillator arm main part, a plurality of oscillator arms are with the equal altitude of a determining deviation set up and make the oscillator arm main part of a plurality of oscillator arms is in the coplanar, so that a flaky radiator is spliced into to a plurality of oscillator arm main parts, and the below of each oscillator arm main part is connected with the equal high ground connection balun of converting into, each convert into ground connection balun include with the first extension that the oscillator arm main part links to each other, the second extension that links to each other with the reflecting plate and set up in between first extension and the second extension and for the middle bending section that first extension and second extension were buckled. The utility model discloses not only can be applied to lower frequency channel, and the antenna height is low, and two polarizations of the dual polarization directional aerial that constitute moreover have fine isolation and cross polarization discrimination.
Description
Technical Field
The utility model relates to an antenna field especially relates to an antenna element and dual polarization directional antenna.
Background
The existing directional antenna generally has two forms, namely a half-wave oscillator form, the total length of two arms of the oscillator is close to a half wavelength, and the height of the two arms of the oscillator away from the reflecting plate is close to a quarter wavelength, so that the problem of the antenna is not great when the frequency is high, but if the frequency is low, the height of the quarter wavelength required by the oscillator arm can cause the height of the whole antenna to be very high, and the requirement on the structure is very high; secondly, a micro-strip patch mode is adopted, the size of the patch is close to one half wavelength, the height of the patch can be one quarter wavelength or even one eighth wavelength, and the effect of low section can be realized; but if a simpler form of feeding is used: in a single-point feed mode, the polarization purity of the dual-polarized oscillator is poor, so that the isolation degree and the cross polarization discrimination degree of two polarizations are influenced; if the four-point feeding form is adopted, although the polarization purity problem can be solved, the more complicated connection of the subsequent feeding position connection and the feeding network is brought; in addition, the microstrip patch unit also has the problem of narrow bandwidth.
Therefore, a new antenna is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an antenna element, this antenna element can be applied to lower frequency channel, and the antenna height is low, and is low to the structural requirement.
Another object of the present invention is to provide a dual polarized directional antenna composed of antenna elements, which can be applied to lower frequency bands, and the antenna height is low, and two polarizations have good isolation and cross polarization discrimination.
In order to realize purposefully, the utility model discloses an antenna element, including a plurality of oscillator arms, each oscillator arm includes flaky oscillator arm main part, a plurality of oscillator arms with the equal altitude of a determining deviation set up and make the oscillator arm main part of a plurality of oscillator arms is in the coplanar, so that a flaky radiator is spliced into to a plurality of oscillator arm main parts, and the below of each oscillator arm main part is connected with the equal altitude and turns into ground connection balun, each turn into ground connection balun include with first extension that the oscillator arm main part links to each other, the second extension that links to each other with the reflecting plate and set up in between first extension and the second extension and for the middle bending section that first extension and second extension were buckled.
Compared with the prior art, the utility model discloses an antenna element adopts and converts ground connection balun into as the feed balun, under the condition that does not reduce balun total length, very big reduction the height of oscillator arm distance from the reflecting plate, make on the operating frequency of oscillator keeps the basis of needing the frequency, great reduction the antenna height, it is low to antenna structure design requirement, can satisfy the low frequency requirement, and the mode that uses the balun feed makes this application can use simple single-point feed, when being used for dual polarized antenna, can make two polarisations have fine isolation and cross polarization discrimination. On the other hand, the utility model discloses an antenna element has fused the microstrip paster form, has the low section characteristics of paster unit, and the lower correspondence of section of antenna lightens antenna weight, improves the anti-wind ability of antenna, has fine actual effect.
Preferably, the length of the folded ground balun is approximately equal to one quarter wavelength, and the height of the folded ground balun is approximately equal to one tenth wavelength, so that the operating frequency of the antenna element operates in a lower frequency range.
Preferably, the diagonal length of the radiating element is adjacent to or equal to one-half wavelength. This scheme makes the utility model discloses an antenna element has the characteristic of half-wave oscillator, even makes the antenna element of this application mix half-wave oscillator and microstrip paster form, constitutes a new oscillator form.
Preferably, the first extending section and the second extending section are both vertical sections vertically arranged relative to the vibrator arm main body, and the middle bending section is a parallel section parallel arranged relative to the vibrator arm main body.
Specifically, the front end of the first extension section is bent and extended to form a front end fixing portion fixed on the vibrator arm main body, the rear end of the first extension section is connected with the middle bending section, the front end of the second extension section is connected with the middle bending section, and the rear end of the second extension section is bent and extended to form a rear end fixing portion fixed on the reflecting plate.
Preferably, the vibrator arm bodies of a plurality of the vibrator arms are disposed at equal angles around a center.
Specifically, the outer side of each vibrator arm main body is connected with a vibrator plumbing arm which is vertical to the plate surface of the vibrator arm main body in a downward bending mode, and the vibrator plumbing arms of the vibrator arms which are arranged diagonally are arranged oppositely. The oscillator plumbing arm is used for enabling a central resonance point of the antenna oscillator to expand towards low frequency.
Specifically, the oscillator arm has even number of oscillator arm bodies and even number of oscillator arms arranged around a center at equal angles, two oscillator arms arranged diagonally form an oscillator arm group, the antenna oscillator further includes a feed base, a feed piece and a coaxial cable corresponding to the oscillator arm group, in each oscillator arm group, a first oscillator arm is electrically connected with an outer conductor of the coaxial cable, a second oscillator arm is electrically connected with the feed base, one end of the feed piece is electrically connected with the feed base, and the other end extends to above the first oscillator arm and is electrically connected with an inner conductor of the coaxial cable. The feed structure is simple, and the polarization purity is good when the feed structure is used for a dual-polarized antenna.
Preferably, opposite edges between every two adjacent oscillator arm main bodies are respectively bent upwards to form spacing strips perpendicular to the plate surfaces of the oscillator arm main bodies, the spacing strips between every two adjacent oscillator arms are opposite at a certain interval to form a capacitor unit, the capacitance between the oscillator arms is effectively increased, and the unit impedance can be matched to a required value by adjusting the capacitance of the capacitor unit.
Preferably, the vibrator arms are four in number.
Preferably, the antenna element further comprises a guide piece fixed above the radiating element at a certain distance for expanding the bandwidth of frequency.
The utility model also discloses a dual polarization directional antenna, including reflecting plate and two antenna elements, the antenna element as above, and two the antenna element is located on the reflecting plate with the uniform distance.
Compared with the prior art, the utility model discloses an antenna element adopts and converts ground connection balun into as the feed balun, under the condition that does not reduce balun total length, very big reduction the height of oscillator arm distance from the reflecting plate, make on the operating frequency of oscillator keeps the basis of needing the frequency, great reduction the antenna height, it is low to antenna structure design requirement, can satisfy the low frequency requirement, and the mode that uses the balun feed makes this application can use simple single-point feed, make among the dual polarization directional aerial, two polarizations have fine isolation and cross polarization discrimination. On the other hand, the utility model discloses an antenna element has fused the microstrip paster form, has the low section characteristics of paster unit, and the lower correspondence of section of antenna lightens antenna weight, improves the anti-wind ability of antenna, has fine actual effect.
Preferably, the dual-polarized directional antenna comprises two groups of sensing pieces corresponding to the antenna oscillators, each group of sensing pieces is provided with two sensing pieces, and the two sensing pieces are respectively vertically installed on the reflecting plate and located at two opposite sides of the corresponding antenna oscillator and the other antenna oscillator, and located between two adjacent oscillator arms in one antenna oscillator.
Drawings
Fig. 1 is a three-dimensional structure diagram of the dual-polarized directional antenna of the present invention.
Figure 2 is a side view of the dual polarized directional antenna of the present invention
Fig. 3 is a schematic perspective view of an angle of the antenna element of the present invention.
Fig. 4 is the rear end structure schematic diagram of the antenna element removing guide sheet of the present invention.
Fig. 5 is a schematic perspective view of another angle of the antenna element of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Referring to fig. 1 and 2, the present invention also discloses a dual polarized directional antenna 200, which comprises a reflection plate 30 and two antenna elements 100, and two of the antenna elements 100 are disposed on the reflection plate 30 at a certain distance.
With continuing reference to fig. 1 and fig. 2, the dual-polarized directional antenna 200 includes two sets of sensing pieces 50 corresponding to the antenna elements 100, each set of sensing pieces 50 has two, and the two sensing pieces 50 in each set are respectively and vertically installed on the reflection plate 30 and located at two opposite sides of the antenna element 100 corresponding to the other antenna element 100, and located between two adjacent oscillator arms 10 in the antenna element 100.
Referring to fig. 3 to 5, the antenna element 100 includes a plurality of dipole arms 10, each of the dipole arms 10 includes a plate-shaped dipole arm body 11, the plurality of dipole arms 10 are equidistantly disposed at a certain interval, and the dipole arm bodies 11 of the plurality of dipole arms 10 are located on the same plane, so that the plurality of dipole arm bodies 11 are spliced into a plate-shaped radiating element, an equi-high folded ground balun 20 is connected below each dipole arm body 11, each of the folded ground balun 20 includes a first extension section 21 connected to the dipole arm body 11, a second extension section 22 connected to a reflection plate 30, and a middle bending section 23 disposed between the first extension section 21 and the second extension section 22 and bent with respect to the first extension section 21 and the second extension section 22. Each vibrator arm 10 is fixed to the reflection plate 10 by one or more insulating columns 14, and the insulating columns 14 may be nylon columns.
Referring to fig. 5, the first extension segment 21 and the second extension segment 22 are both vertical segments that are vertically disposed with respect to the vibrator arm body 11, and the middle bending segment 23 is a parallel segment that is parallel disposed with respect to the vibrator arm body 11. Of course, the first extension 21 and the second extension 22 may have other structures, such as straight shapes with other angles. Other configurations of the intermediate bend 23 are possible, such as multiple segments forming a bend or other angled straight edge.
Referring to fig. 5, the front end of the first extending section 21 is bent and extended to form a front end fixing portion 24 fixed on the vibrator arm body 11, the rear end of the first extending section is connected to the middle bending section 23, the front end of the second extending section 22 is connected to the middle bending section 23, and the rear end of the second extending section is bent and extended to form a rear end fixing portion 25 fixed on the reflection plate 30.
The folded ground balun 20 is formed by bending a metal plate, such as an aluminum plate or a copper plate.
Preferably, the length of the folded ground balun 20 is approximately equal to a quarter wavelength, and the height of the folded ground balun 20 is approximately equal to a tenth wavelength, so that the operating frequency of the antenna element 100 operates in a lower frequency range. In this embodiment, the frequency band corresponding to the antenna is 370-450MHz, the frequency of the antenna is 400MHz, and the length of the corresponding reduced ground balun 20 is 65 mm.
In the present embodiment, there are four oscillator arms 10, and the oscillator arm bodies 11 of the four oscillator arms are equiangularly disposed around a center, and the diagonal distance outside the four oscillator arms 10 is slightly less than one half wavelength. Specifically, the oscillator arm body 11 is rectangular, and the outer side of the oscillator arm body 11 has an oblique angle, so that the opposite corners of the radiating element are oblique angles. Of course, the number of the vibrator arms 10 may be other values, and is not limited to four.
In this embodiment, the sensing piece 50 is located between adjacent vibrator arms 10.
Referring to fig. 3 to 5, a vibrator arm 12 perpendicular to the plate surface of each vibrator arm body 11 is bent downward and connected to the outer side of each vibrator arm body 11, and the vibrator arms 12 of the diagonally arranged vibrator arms 11 are arranged opposite to each other. The element horn 12 serves to extend the central resonance point of the antenna element 100 towards low frequencies. The vibrator arm 12 is fixed to the metal vibrator body 11 by screws, and the length of the vibrator arm 12 is half the height of the vibrator body 11. The vibrator plumbing arm 12 is a metal aluminum plate, and the vibrator main body 11 is a metal aluminum plate or a metal copper plate.
In order to reduce the weight of the oscillator arm body 11, a through hole 111 is further formed in the middle of the oscillator arm body 11.
Referring to fig. 3 and 4, the antenna element 100 further includes a guide tab 40, and the guide tab 40 is fixed above the radiating element at a certain interval for expanding the bandwidth of the frequency. Wherein the lead tab 40 is located a distance from the horn body 11 of approximately twenty-quarter wavelengths or equal to about 30mm and has a width of approximately (e.g., slightly greater than) or equal to one-eighth wavelengths or approximately 230 mm. The guide piece 40 is fixed to the vibrator arm body 11 by a plurality of insulating columns 41, and the insulating columns 41 are nylon columns.
Referring to fig. 4, the antenna element 100 further includes a feeding base 51, a feeding tab 52, and a coaxial cable 53, where an even number of the oscillator arms 10 are provided, the oscillator bodies 11 of the even number of the oscillator arms 10 are disposed around a center at equal angles, so that two oscillator arms 11 are disposed diagonally, and two oscillator arms 10 disposed diagonally form an oscillator arm group, each oscillator arm group corresponds to one feeding base 51, one feeding tab 52, and one coaxial cable 53, in each oscillator arm group, a first oscillator arm 10 is electrically connected (welded) to an outer conductor 531 of the coaxial cable 53, a second oscillator arm 10 is electrically connected (welded) to the feeding base 51, and one end of the feeding tab 52 is electrically connected to the feeding base 51, and the other end extends above the first oscillator arm 10 and is electrically connected to an inner conductor 532 of the coaxial cable 53. The electric horn is provided with two oscillator arm groups, the current direction of each oscillator arm group is consistent with the connection direction of the inner conductor 53, the feed pieces 52 corresponding to the two oscillator arm groups are arranged in a cross mode, and the polarization of the two oscillator arm groups is the polarization direction of plus or minus 45 degrees.
Referring to fig. 3 and 4, the opposite edges between every two adjacent oscillator arm bodies 11 are respectively bent upwards to form spacing bars 13 perpendicular to the plate surfaces of the oscillator arm bodies 11, the spacing bars 13 between two adjacent oscillator arms 10 are opposite at a certain interval to form a capacitor unit, so that the capacitance between the oscillator arms is effectively increased, and the unit impedance can be matched to a required value by adjusting the capacitance of the capacitor unit. The height of the spacer 13 is 10 mm. Two spaced-apart opposite spacer bars 13 are connected together by insulating spacers 131.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.
Claims (10)
1. An antenna element, characterized by: the dipole arm comprises a plurality of dipole arms, each dipole arm comprises a flaky dipole arm main body, the dipole arms are arranged at equal heights at certain intervals and enable the dipole arm main bodies of the dipole arms to be positioned on the same plane, so that the dipole arm main bodies are spliced into a flaky radiating piece, a folded grounding balun with equal heights is connected below each dipole arm main body, and each folded grounding balun comprises a first extending section connected with the dipole arm main body, a second extending section connected with a reflecting plate and a middle bending section arranged between the first extending section and the second extending section and bent relative to the first extending section and the second extending section.
2. An antenna element according to claim 1, wherein: the first extending section and the second extending section are vertical sections which are vertically arranged relative to the vibrator arm main body, and the middle bending section is a parallel section which is parallel to the vibrator arm main body.
3. An antenna element according to claim 2, wherein: the front end of the first extension section is bent and extended to form a front end fixing part fixed on the vibrator arm main body, the rear end of the first extension section is connected with the middle bending section, the front end of the second extension section is connected with the middle bending section, and the rear end of the second extension section is bent and extended to form a rear end fixing part fixed on the reflecting plate.
4. An antenna element according to claim 1, wherein: the oscillator arm main bodies of the oscillator arms are arranged around a center at equal angles, the outer side of each oscillator arm main body is connected with an oscillator vertical arm which is vertical to the plate surface of the oscillator arm main body in a downward bending mode, and the oscillator vertical arms of the oscillator arms which are arranged diagonally are arranged oppositely.
5. An antenna element according to claim 1, wherein: the antenna oscillator further comprises a feed seat, a feed sheet and a coaxial cable which correspond to the oscillator arm groups, wherein in each oscillator arm group, the first oscillator arm is electrically connected with an outer conductor of the coaxial cable, the second oscillator arm is electrically connected with the feed seat, one end of the feed sheet is electrically connected with the feed seat, and the other end of the feed sheet extends to the upper part of the first oscillator arm and is electrically connected with an inner conductor of the coaxial cable.
6. An antenna element according to claim 1, wherein: the opposite edges between every two adjacent oscillator arm main bodies are respectively bent upwards to form spacing strips vertical to the plate surfaces of the oscillator arm main bodies, and the spacing strips between every two adjacent oscillator arms are opposite at a certain interval to form a capacitor unit.
7. An antenna element according to claim 1, wherein: the radiation piece is fixed above the radiation piece at a certain distance.
8. An antenna element according to claim 1, wherein: the length of the folded grounded balun is close to or equal to a quarter wavelength, the height of the folded grounded balun is close to or equal to a tenth wavelength, and the diagonal length of the radiating element is close to or equal to a half wavelength.
9. A dual polarized directional antenna, characterized by: comprising a reflector plate and two antenna elements according to any of claims 1-8, which are arranged on the reflector plate at a distance.
10. The dual polarized directional antenna of claim 9, wherein: the antenna comprises two groups of induction pieces corresponding to the antenna oscillator, wherein each group of induction pieces is provided with two induction pieces, and the two induction pieces are respectively and vertically arranged on the reflecting plate and are positioned at two opposite sides of the antenna oscillator corresponding to the antenna oscillator and the other antenna oscillator and are positioned between two adjacent oscillator arms in the antenna oscillator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748590.0U CN210668672U (en) | 2019-10-17 | 2019-10-17 | Antenna element and dual-polarized directional antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921748590.0U CN210668672U (en) | 2019-10-17 | 2019-10-17 | Antenna element and dual-polarized directional antenna |
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| CN210668672U true CN210668672U (en) | 2020-06-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821067A (en) * | 2020-12-31 | 2021-05-18 | 广东博纬通信科技有限公司 | Low-frequency oscillator unit and antenna |
| CN113131202A (en) * | 2021-04-27 | 2021-07-16 | 深圳迈睿智能科技有限公司 | Half-wave reverse-folding directional microwave detection antenna |
| CN113346222A (en) * | 2021-05-21 | 2021-09-03 | 中天通信技术有限公司 | Low-frequency oscillator and antenna device |
-
2019
- 2019-10-17 CN CN201921748590.0U patent/CN210668672U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821067A (en) * | 2020-12-31 | 2021-05-18 | 广东博纬通信科技有限公司 | Low-frequency oscillator unit and antenna |
| CN113131202A (en) * | 2021-04-27 | 2021-07-16 | 深圳迈睿智能科技有限公司 | Half-wave reverse-folding directional microwave detection antenna |
| CN113131202B (en) * | 2021-04-27 | 2024-02-09 | 深圳迈睿智能科技有限公司 | Half-wave reverse-folded directional microwave detection antenna |
| CN113346222A (en) * | 2021-05-21 | 2021-09-03 | 中天通信技术有限公司 | Low-frequency oscillator and antenna device |
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