CN211295374U - Satellite navigation terminal antenna of BD B1 frequency channel - Google Patents
Satellite navigation terminal antenna of BD B1 frequency channel Download PDFInfo
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- CN211295374U CN211295374U CN202020052083.XU CN202020052083U CN211295374U CN 211295374 U CN211295374 U CN 211295374U CN 202020052083 U CN202020052083 U CN 202020052083U CN 211295374 U CN211295374 U CN 211295374U
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Abstract
The utility model relates to a satellite navigation terminal antenna of BD B1 frequency channel, including radiant panel and reflecting plate, radiant panel and reflecting plate central point are connected with the coaxial line, and radiant panel upper side has the last radiation arm group who links to each other with the coaxial line heart, and the radiant panel downside has the lower radiation arm group who staggers 180 with last radiation arm group and link to each other with the coaxial line heart outward, and last radiation arm group includes two upper radiation arms that stagger 90 and link to each other towards one end inwards, and lower radiation arm group includes two lower radiation arms that stagger 90 and link to each other towards one end inwards; still be connected with four vertical metal posts that are the rectangle and distribute between radiation plate and the reflecting plate, the radiation plate downside is provided with the radiation paster with vertical metal post position upper and lower one-to-one. The antenna adopts a coaxial line feeding method, the upper layer is connected with the inner center of the coaxial line, the lower layer is connected with the outer center of the coaxial line, 90-degree phase difference is generated, circularly polarized radiation is realized, and the coupling effect is generated through the short-circuit patch and the radiation arm, so that the bandwidth of the antenna can be improved.
Description
Technical Field
The utility model relates to a satellite navigation terminal antenna of BD B1 frequency channel belongs to wireless communication technical field.
Background
Circularly Polarized (CP) antennas are highly preferred for certain wireless communication systems, such as global positioning systems, satellite communication/navigation systems, and radio frequency identification systems, due to their ability to mitigate polarization mismatch and suppress multipath interference. Designing two electric field components with equal amplitude and quadrature phase is a common technique for implementing CP antennas, which can be divided into single-feed and double-feed according to the feeding method. Typically, single feed antennas have simpler feed networks but narrower Axial Ratio (AR) bandwidths, while dual feed antennas can provide wider AR bandwidths but require external hybrid couplers or power dividers, which can add significant size to the system. Therefore, how to obtain a wideband, simple and compact CP antenna has been a topic of attention in the antenna field.
Extensive efforts have been made to increase the bandwidth of a single feed CP antenna. A straightforward approach is to use multiple resonators. By designing each resonator to operate at a different operating frequency and then combining multiple resonators, the combined response increases the overall bandwidth. Another approach is to use higher order modes. Since no additional element is required, miniaturization can be achieved. However, more energy needs to be lost to bring the modes with similar radiation characteristics close to each other, and there are often special restrictions on the size or shape of the antenna.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a satellite navigation terminal antenna capable of increasing the bandwidth of the antenna and realizing the BD B1 frequency band with circularly polarized radiation.
The utility model discloses a following scheme realizes: a satellite navigation terminal antenna of BD B1 frequency band, includes a radiation plate and a reflection plate under the radiation plate, the center parts of the radiation plate and the reflection plate are connected with a coaxial line, the upper side of the radiation plate is provided with an upper radiation arm group connected with the inner center of the coaxial line, the lower side of the radiation plate is provided with a lower radiation arm group which is staggered 180 degrees with the upper radiation arm group and connected with the outer center of the coaxial line, the upper radiation arm group includes two upper radiation arms which are staggered 90 degrees and connected with each other by a conductor patch at one inward end, the lower radiation arm group includes two lower radiation arms which are staggered 90 degrees and connected with each other by a conductor patch at one inward end, and the conductor patch is three-quarter ring shape; still be connected with four vertical metal posts that are the rectangle and distribute between radiation plate and the reflecting plate, the radiation plate downside is provided with four structures the same and with four vertical metal post position upper and lower one-to-one radiation paster, the radiation paster links to each other with corresponding vertical metal post upper end.
Furthermore, the radiation plate and the reflection plate are square, one inward end of one upper radiation arm is connected with the inner center of the coaxial line, one inward end of one lower radiation arm is connected with the outer center of the coaxial line, and the upper radiation arm and the lower radiation arm are distributed on the center line of the radiation plate.
Furthermore, four radiation patches correspondingly connected with the four vertical metal columns are distributed on the diagonal lines of the radiation plate, the radiation patches are in an equilateral triangle shape, and one of the central lines of the radiation patches is superposed with the diagonal line of the radiation plate where the radiation patches are located.
Furthermore, a comb-tooth-shaped structure formed by three parallel long strip patches is arranged between the upper radiation arm and the lower radiation arm, the long strip patches on the two sides are symmetrically arranged on the two sides of the middle long strip patch, and the sawtooth-shaped patches are arranged on the outward side of the long strip patches on the two sides.
Furthermore, a transverse metal beam is connected between the middle parts of the two adjacent vertical metal columns, an intermediate metal column is connected between the middle part of the transverse metal beam and the reflecting plate, and a pair of intermediate transverse metal beams symmetrically distributed on two sides of the coaxial line is connected between the two opposite transverse metal beams.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the antenna adopts a coaxial line feeding method, a radiation arm with a phase difference of 180 degrees is divided into an upper layer and a lower layer, the upper layer is connected with the inner center of the coaxial line, the lower layer is connected with the outer center of the coaxial line, currents with the same amplitude and a phase difference of 90 degrees are generated on the radiation arm of the antenna, circularly polarized radiation is realized, a coupling effect is generated through a short-circuit patch and the radiation arm, the bandwidth of the antenna can be improved, and the effect of increasing the directionality of the antenna is achieved;
(2) the radiating arm is provided with a comb tooth structure and a sawtooth structure, and a current path on the radiating arm can be changed through the structure, and the position of a resonance point of the antenna is adjusted, so that the resonance point is dense, the purpose of expanding the impedance and the axial ratio bandwidth of the antenna is achieved, and the impedance bandwidth and the axial ratio bandwidth of the antenna are improved;
(3) grid type metal frame between radiation arm and the reflecting plate is two-layer about evenly dividing into of middle zone, make antenna middle zone strengthen the electric current of vertical direction and horizontal direction, the radiation that vertical current produced has improved the longitudinal radiation of antenna, can improve the low angle of elevation gain of antenna, horizontal current can play the effect of increasing the bandwidth, make better the using among the satellite navigation system of antenna, and four vertical metal columns become the metal probe structure, the current distribution of antenna has been changed, frequency point is to low frequency offset, be favorable to realizing that the antenna is miniaturized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.
Drawings
FIG. 1 is a perspective view of an embodiment of the present invention;
fig. 2 is a top view of a radiation plate according to an embodiment of the present invention;
fig. 3 is a bottom view of a radiation plate according to an embodiment of the present invention;
FIG. 4 is a perspective view of the embodiment of the present invention without the radiation plate;
FIG. 5 shows an S-shaped antenna according to an embodiment of the present invention11A parameter map;
fig. 6 is an AR diagram of an antenna according to an embodiment of the present invention;
fig. 7 is a directional diagram of an antenna according to an embodiment of the present invention;
the reference numbers in the figures illustrate: 100-radiation plate, 200-reflection plate, 210-first upper radiation arm, 220-second upper radiation arm, 230-first lower radiation arm, 240-second lower radiation arm, 250-conductor patch, 260-radiation patch, 270-strip patch, 280-sawtooth patch, 300-coaxial line, 400-vertical metal column, 500-transverse metal beam, 600-middle metal column, 700-middle transverse metal beam.
Detailed Description
As shown in fig. 1 to 4, a BD B1 band satellite navigation terminal antenna includes a radiation plate 200 and a reflection plate 100 located below the radiation plate 200, wherein a coaxial line 300 is connected to the central portions of the radiation plate 200 and the reflection plate 100, the upper side surface of the radiation plate 200 is provided with an upper radiation arm group connected with the inner center of the coaxial line, the lower side surface of the radiation plate 200 is provided with a lower radiation arm group which is staggered by 180 degrees with the upper radiation arm group and connected with the outer center of the coaxial line, the phase difference between the upper radiation arm group and the lower radiation arm group is 180 degrees, the upper radiation arm group comprises two upper radiation arms which are staggered by 90 degrees and are connected with one end towards the inside through a conductor patch, namely a first upper radiating arm 210 and a second upper radiating arm 220, the lower radiating arm group comprises two lower radiating arms which are staggered by 90 degrees and are connected at their inward ends by conductor patches, namely a first lower radiating arm 230 and a second lower radiating arm 240, the conductor patch is a three-quarter circular ring shape; the upper radiation arm group forms a cross dipole arm, the lower radiation arm group forms a cross dipole arm, the phase difference between the upper radiation arm group on the upper side surface and the lower radiation arm group on the lower side surface of the radiation plate is 180 degrees, and the conductor patch 250 is in a three-quarter circular ring shape; four rectangular vertical metal columns 400 are connected between the radiation plate 200 and the reflection plate 100, four radiation patches 260 which have the same structure and are in one-to-one correspondence with the four vertical metal columns are arranged on the lower side surface of the radiation plate 200, the radiation patch 260 is connected with the upper end of the corresponding vertical metal column, the antenna adopts a coaxial line feeding method, the radiation arm component with the phase difference of 180 degrees is divided into an upper layer and a lower layer, the upper radiation arm component of the upper layer is connected with the inner center of the coaxial line, the lower radiation arm component of the lower layer is connected with the outer center of the coaxial line, currents with the same amplitude and the phase difference of 90 degrees are generated on the radiation arm of the antenna, the circularly polarized radiation is realized, and the radiation patch (also called a short circuit patch) and the radiation arm generate a coupling effect, the bandwidth of the antenna can be improved, and the antenna has very excellent directivity performance by reasonably adjusting the distance between the reflecting plate and the radiation patch of the antenna.
In this embodiment, the radiation plates 200 and the reflection plate 100 are both square, the projection of the diagonal line of the radiation plate 200 on the reflection plate 100 coincides with the diagonal line of the reflection plate, one of the upper radiation arms is connected with the coaxial line inner core at the inward end, one of the lower radiation arms is connected with the coaxial line outer core at the inward end, the upper radiation arms and the lower radiation arms are distributed on the center line of the radiation plate, that is, the first upper radiation arm 210 is connected with the coaxial line inner core, the first lower radiation arm 230 is connected with the coaxial line outer core at the inward end, the first upper radiation arm and the first lower radiation plate are staggered by 180 °, and the second upper radiation arm and the second lower radiation plate are also staggered by 180 °; the crossed dipole arms with the phase difference of 180 degrees are distributed in an upper layer and a lower layer and are respectively connected with the inner center and the outer center of the coaxial line, the two monopoles are connected through a three-quarter circular ring, so that the current amplitudes on the antenna radiation arms are the same, the phase difference is 90 degrees, the antenna can generate circularly polarized radiation, and the three-quarter circular ring structure also has the function of improving the bandwidth of the antenna.
In this embodiment, four vertical metal columns 400 are distributed in a square shape, the four vertical metal columns 400 are distributed on the diagonal lines of the reflection plate 100, four radiation patches correspondingly connected with the four vertical metal columns are distributed on the diagonal lines of the radiation plate, the radiation patches 260 are in an equilateral triangle shape, and one of the center lines of the radiation patches 260 coincides with the diagonal line of the radiation plate where the center line is located; four identical and completely symmetrical equilateral triangle radiation patches are arranged on the periphery of the radiation arm, the structure can enable the radiation patches and the radiation arm to generate a coupling effect, and on the basis of a resonance point generated by the dipole arm, a new resonance frequency point is generated.
In this embodiment, the upper radiation arm (i.e., the first upper radiation arm 210 and the second upper radiation arm 220) and the lower radiation arm (i.e., the first lower radiation arm 230 and the second lower radiation arm 240) both have a comb-teeth structure composed of three parallel strip patches 270 therebetween, the strip patches on both sides are symmetrically disposed on both sides of the middle strip patch, and the outward side of the strip patches on both sides is provided with a saw-tooth patch 280, and an included angle between the saw-tooth patch 280 and the saw-tooth patch 280 is 60 °; the radiating arm is provided with a comb tooth structure and a sawtooth structure, gaps between two adjacent strip-shaped patches in the comb tooth structure are the same, sawtooth-shaped patches on the strip-shaped patches on two sides are completely symmetrical, a current path on the radiating arm can be changed through the structure, and the position of a resonance point of the antenna is adjusted, so that the resonance point becomes dense, the purpose of expanding the impedance and the axial ratio bandwidth of the antenna is achieved, and the impedance bandwidth and the axial ratio bandwidth of the antenna are improved.
In this embodiment, a transverse metal beam 500 is connected between the middle portions of two adjacent vertical metal columns 400, an intermediate metal column 600 is connected between the middle portion of the transverse metal beam 500 and the reflection plate 100, wherein a pair of intermediate transverse metal beams 700 symmetrically distributed on two sides of a coaxial line is connected between two opposite transverse metal beams, the vertical metal column 400, the transverse metal beam 500, the intermediate metal column 600 and the intermediate transverse metal beam 700 form a grid-type metal frame, the metal frame uniformly divides the middle area into an upper layer and a lower layer, so that the current in the vertical direction and the horizontal direction is enhanced in the middle area of the antenna, the longitudinal radiation of the antenna is improved by the radiation generated by the vertical current, the low elevation gain of the antenna can be improved, the horizontal current can play a role in increasing the bandwidth, so that the antenna is better applied to a satellite navigation system, and the four vertical metal columns form a metal probe structure, the current distribution of the antenna is changed, the frequency point shifts to low frequency, and the miniaturization of the antenna is favorably realized.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (5)
1. A BD B1 frequency band satellite navigation terminal antenna is characterized in that: the radiation plate comprises a radiation plate and a reflection plate positioned below the radiation plate, wherein the central parts of the radiation plate and the reflection plate are connected with a coaxial line, the upper side surface of the radiation plate is provided with an upper radiation arm group connected with the inner center of the coaxial line, the lower side surface of the radiation plate is provided with a lower radiation arm group which is staggered by 180 degrees with the upper radiation arm group and is connected with the outer center of the coaxial line, the upper radiation arm group comprises two upper radiation arms which are staggered by 90 degrees and are connected with one ends of the inner sides through conductor patches, the lower radiation arm group comprises two lower radiation arms which are staggered by 90 degrees and are connected with one ends of the inner sides through conductor patches, and the conductor patches; still be connected with four vertical metal posts that are the rectangle and distribute between radiation plate and the reflecting plate, the radiation plate downside is provided with four structures the same and with four vertical metal post position upper and lower one-to-one radiation paster, the radiation paster links to each other with corresponding vertical metal post upper end.
2. The BD B1 band satellite navigation terminal antenna of claim 1, wherein: the radiation plate and the reflection plate are square, one inward end of one upper radiation arm is connected with the inner center of the coaxial line, one inward end of one lower radiation arm is connected with the outer center of the coaxial line, and the upper radiation arm and the lower radiation arm are distributed on the center line of the radiation plate.
3. The BD B1 band satellite navigation terminal antenna of claim 2, wherein: the four radiation patches correspondingly connected with the four vertical metal columns are distributed on the diagonal lines of the radiation plate and are in equilateral triangles, and one of the central lines of the radiation patches is superposed with the diagonal line of the radiation plate where the radiation patches are located.
4. The BD B1 band satellite navigation terminal antenna of claim 1, wherein: the middle of the upper radiation arm and the middle of the lower radiation arm are respectively provided with a comb-shaped structure formed by three parallel long strip patches, the long strip patches on the two sides are symmetrically arranged on the two sides of the middle long strip patch, and the outward side of the long strip patches on the two sides is provided with a saw-tooth patch.
5. The BD B1 band satellite navigation terminal antenna of claim 1, wherein: and a pair of middle transverse metal beams symmetrically distributed on two sides of the coaxial line is connected between the transverse metal beams on two opposite sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020052083.XU CN211295374U (en) | 2020-01-10 | 2020-01-10 | Satellite navigation terminal antenna of BD B1 frequency channel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020052083.XU CN211295374U (en) | 2020-01-10 | 2020-01-10 | Satellite navigation terminal antenna of BD B1 frequency channel |
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| CN211295374U true CN211295374U (en) | 2020-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029758A (en) * | 2020-01-10 | 2020-04-17 | 国网思极神往位置服务（北京）有限公司 | Satellite navigation terminal antenna of BD B1 frequency band and working method thereof |
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2020
- 2020-01-10 CN CN202020052083.XU patent/CN211295374U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029758A (en) * | 2020-01-10 | 2020-04-17 | 国网思极神往位置服务（北京）有限公司 | Satellite navigation terminal antenna of BD B1 frequency band and working method thereof |
| CN111029758B (en) * | 2020-01-10 | 2023-10-20 | 国网思极神往位置服务（北京）有限公司 | BD B1 frequency band satellite navigation terminal antenna and working method thereof |
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Address after: 102200 room 510, 5 / F, block C, State Grid Park, future science city, Changping District, Beijing Patentee after: State Grid Siji Location Service Co.,Ltd. Patentee after: State Grid Information and Communication Industry Group Co., Ltd Address before: 102200 room 510, 5 / F, block C, State Grid Park, future science city, Changping District, Beijing Patentee before: STATE GRID SIJI SHENWANG POSITION SERVICE (BEIJING) Co.,Ltd. Patentee before: State Grid Information and Communication Industry Group Co., Ltd |