CN209880806U - Square six-arm slot helical antenna - Google Patents
Square six-arm slot helical antenna Download PDFInfo
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- CN209880806U CN209880806U CN201921121357.XU CN201921121357U CN209880806U CN 209880806 U CN209880806 U CN 209880806U CN 201921121357 U CN201921121357 U CN 201921121357U CN 209880806 U CN209880806 U CN 209880806U
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Abstract
The utility model provides a square six-arm slot helical antenna, which comprises an antenna main body, wherein a feed network of the antenna is connected with N helical arm units which are parallel to each other; the spiral arm unit extends spirally towards the direction far away from the grounding plate; the overlooking direction of the spiral surface of the spiral arm unit is rectangular; the spiral surface of each spiral arm unit is formed by bending the spiral arm unit four times, and the bending angles of the spiral arm units are the same each time so as to excite circular polarization waves to realize the circular polarization of the antenna; the utility model discloses do not need the electric bridge, with low costs, functional, simple structure, small in size, be fit for using in satellite navigation terminal navigation equipment.
Description
Technical Field
The utility model belongs to the technical field of the antenna technique and specifically relates to a square six arm gap helical antenna.
Background
With the rapid development of wireless communication technology, antennas have gained wide application and important technological development as essential components in various wireless communication devices.
A directional antenna is an antenna that emits and receives electromagnetic waves in one or more specific directions with a high intensity, and emits and receives electromagnetic waves in other directions with a null or minimum intensity. The directional transmitting antenna is adopted to increase the effective utilization rate of the radiation power and increase the confidentiality; the main purpose of using directional receiving antenna is to enhance signal strength and increase anti-interference ability.
Circularly polarized antennas are a common form of antenna in many radar systems, navigation systems, satellite systems, telemetry and telemetry systems, etc. The circularly polarized antenna is beneficial to receiving space electromagnetic waves, and meanwhile interference of rain and fog reflected noise can be inhibited. The research on the circularly polarized antenna with low cost, miniaturization and low profile has important practical significance.
Global Navigation Satellite Systems (GNSS) play an important role today in everyday military, civil and commercial applications, and it is critical for these applications to have circularly polarized antennas with good performance and good directionality.
Because the traditional four-arm helical antenna is widely applied due to excellent performance, the market has higher and higher requirements on antenna products along with the rapid development of satellite communication and navigation technologies. The traditional helical antenna must be provided with a complex electric bridge and is not easy to miniaturize, so a novel helical antenna must be provided, and the simplification and miniaturization of the antenna structure are realized on the premise of ensuring the performance of the antenna.
Disclosure of Invention
The utility model provides a square six arm gap helical antenna does not need electric bridge, with low costs, functional, simple structure, small in size, is fit for using in satellite navigation terminal navigation equipment.
The utility model adopts the following technical scheme.
A square six-arm slot spiral antenna comprises an antenna main body (1), wherein a feed network (6) of the antenna is connected with N parallel spiral arm units (2); the spiral arm unit extends spirally towards the direction far away from the grounding plate (4); the overlooking direction of the spiral surface of the spiral arm unit is rectangular; the spiral surface of each spiral arm unit is formed by bending the spiral arm unit four times, and the bending angles of the spiral arm units are the same each time so as to excite the circularly polarized wave to realize the circular polarization of the antenna.
The spiral arm units are in a gap structure, and each spiral arm unit is positioned on the wall of a metal rectangular cylinder; the spiral arm units are the same in length and rotation direction, and the spiral arm units are the same in interval.
And N is six, and the spiral surface of each spiral arm unit is a slotted gap arranged at the wall of the rectangular cylinder.
Each spiral arm unit is bent upwards to spiral, and the upward inclination angle is preferably in the range of 15-30 degrees.
The feed network comprises a feed line which is bent at the lower part of the cylinder wall of the rectangular cylinder and extends to the upper surface of the grounding plate, and a feed input end (31) of the feed network is positioned at the grounding plate at the bottom of the rectangular cylinder and is connected with an excitation port (51) through a coaxial line (7).
The grounding plate is 0.5mm-2mm thick; the width of the metal strip of the feed network is 1-2.5 mm.
The lower surface of the grounding plate is provided with an annular reflecting patch (52) formed by bending; the outer edge of the reflective patch is connected with the patch gap.
The frequency point of the antenna resonance can be adjusted by adjusting the length of the spiral arm unit.
The resonant frequency point of the antenna is located in a receiving frequency band of a global positioning system GPSL1 or a receiving frequency band B1 of a Beidou satellite navigation system BDS.
The antenna adopts coupling feed, and the size of the antenna is preferably 23mm 53 mm.
Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses a fluting rather than traditional metal strip on the metal surface can effectively realize broadband and antenna directionality. By adopting coupling feed, compared with the traditional spiral antenna, the spiral antenna does not need a complex electric bridge, has simpler antenna structure, and has low cost and easy manufacture because the spiral antenna main body and the bending feed network structure are both built on the best-connection IT-8350G plate. The size of the antenna is preferably 23mm 53mm, and the antenna has the advantages of good performance, simple structure and small size, and is suitable for being applied to satellite navigation terminal equipment.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description:
FIG. 1 is a perspective view of a slot helix antenna;
FIG. 2 is a front view of a slot spiral antenna;
FIG. 3 is a top view of a slot spiral antenna;
FIG. 4 is a schematic plan expanded view of FIG. 1;
FIG. 5 is a schematic view of the bottom surface of the ground plate of the slot helix antenna;
FIG. 6 is a diagram of a reflection coefficient simulation result of a slot helical antenna;
FIG. 7 is a diagram of simulation results of the circular polarization axial ratio bandwidth of a slot helical antenna;
FIG. 8 is a right-hand square view of a slot helix antenna;
FIG. 9 is a left-hand square view of a slot helix antenna;
in the figure, 1, an antenna body, 2, a spiral arm unit, 3, a rectangular cylinder, 4, a grounding plate, 5, an air layer, 6, a feed network, 7, a coaxial line, 31, a feed input end, 51, an excitation port, 52, an annular reflection patch, 53 and a patch gap.
Detailed Description
As shown in fig. 1-9, a square six-arm slot helical antenna comprises an antenna main body 1, wherein a feed network 6 of the antenna is connected with N helical arm units 2 which are parallel to each other; the spiral arm unit extends spirally towards the direction far away from the grounding plate 4; the overlooking direction of the spiral surface of the spiral arm unit is rectangular; the spiral surface of each spiral arm unit is formed by bending the spiral arm unit four times, and the bending angles of the spiral arm units are the same each time so as to excite the circularly polarized wave to realize the circular polarization of the antenna.
The spiral arm units are in a gap structure, and each spiral arm unit is positioned on the wall of a metal rectangular cylinder; the spiral arm units are the same in length and rotation direction, and the spiral arm units are the same in interval.
And N is six, and the spiral surface of each spiral arm unit is a slotted gap arranged at the wall of the rectangular cylinder.
An air layer 5 is arranged at the slot gap; each spiral arm unit is bent upwards to spiral, and the upward inclination angle is preferably in the range of 15-30 degrees.
The feed network comprises a feed line which is bent at the lower part of the rectangular cylinder wall and extends to the upper surface of the grounding plate, and a feed input end 31 of the feed network is positioned at the grounding plate at the bottom of the rectangular cylinder and is connected with an excitation port 51 through a coaxial line 7.
The grounding plate is 0.5mm-2mm thick; the width of the metal strip of the feed network is 1-2.5 mm.
The lower surface of the grounding plate is provided with an annular reflecting patch 52 formed by bending; the outer edge of the reflective patch is connected to the patch aperture 53.
The frequency point of the antenna resonance can be adjusted by adjusting the length of the spiral arm unit.
The resonant frequency point of the antenna is located in a receiving frequency band of a global positioning system GPSL1 or a receiving frequency band B1 of a Beidou satellite navigation system BDS.
The antenna adopts coupling feed, and the size of the antenna is preferably 23mm 53 mm.
In the embodiment, the antenna adopts a form of slotting on the outer surface of a medium to form six groups of spiral arm unit gaps, the feed network is attached to the inner surface of a square cylinder medium, a coupling feed method is adopted, an electric bridge is not needed, the structure is simple, and the size is small.
In this example, the antenna size is 23mm 53mm, and the bottom FR4 ground plate size is 35mm 0.8 mm.
The specific sizes are as follows: the thickness of the combined IT-8350G plate 3 is 0.5mm, the height of the spiral antenna body 1 is 53mm, the circumference of the spiral antenna body 1 is 92mm, the length of the six groups of spiral arm units 2 is 91mm, the width is 3.2mm, the angle of inclination along the horizontal plane is 23 degrees, the width of the bent feed network 6 is 1.5mm, the radius of the coaxial line 7 is 0.45mm, the radius of the excitation port 51 is 1.3mm, and the gap width of the patch gap 52 of the bent annular reflection patch 52 on the lower surface of the bottom FR4 ground plate 4 is 1 mm.
The rectangular cylinder is preferably prepared and molded by a Linmao IT-8350G plate; the ground plate is preferably formed with FR4 ground plate.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, without thereby limiting the scope of the invention. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and spirit of the present invention should be within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a square six arm gap helical antenna, includes antenna main part (1), its characterized in that: the feed network (6) of the antenna is connected with the N spiral arm units (2) which are parallel to each other; the spiral arm unit extends spirally towards the direction far away from the grounding plate (4); the overlooking direction of the spiral surface of the spiral arm unit is rectangular; the spiral surface of each spiral arm unit is formed by bending the spiral arm unit four times, and the bending angles of the spiral arm units are the same each time so as to excite the circularly polarized wave to realize the circular polarization of the antenna.
2. The square six-arm slot spiral antenna of claim 1, wherein: the spiral arm units are in a gap structure, and each spiral arm unit is positioned on the wall of a metal rectangular cylinder; the spiral arm units are the same in length and rotation direction, and the spiral arm units are the same in interval.
3. The square six-arm slot spiral antenna of claim 1, wherein: and N is six, and the spiral surface of each spiral arm unit is a slotted gap arranged at the wall of the rectangular cylinder.
4. A square six-arm slot spiral antenna according to claim 3, wherein: each spiral arm unit is bent upwards to spiral, and the upward inclination angle is preferably in the range of 15-30 degrees.
5. A square six-arm slot spiral antenna according to claim 3, wherein: the feed network comprises a feed line which is bent at the lower part of the cylinder wall of the rectangular cylinder and extends to the upper surface of the grounding plate, and a feed input end (31) of the feed network is positioned at the grounding plate at the bottom of the rectangular cylinder and is connected with an excitation port (51) through a coaxial line (7).
6. The square six-arm slot spiral antenna of claim 5, wherein: the grounding plate is 0.5mm-2mm thick; the width of the metal strip of the feed network is 1-2.5 mm.
7. The square six-arm slot spiral antenna of claim 5, wherein: the lower surface of the grounding plate is provided with an annular reflecting patch (52) formed by bending; the outer edge of the reflective patch is connected with the patch gap.
8. The square six-arm slot spiral antenna of claim 5, wherein: the frequency point of the antenna resonance can be adjusted by adjusting the length of the spiral arm unit.
9. The square six-arm slot spiral antenna of claim 8, wherein: the resonant frequency point of the antenna is located in a receiving frequency band of a global positioning system GPSL1 or a receiving frequency band B1 of a Beidou satellite navigation system BDS.
10. The square six-arm slot spiral antenna of claim 8, wherein: the antenna adopts coupling feed, and the size of the antenna is preferably 23mm 53 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121357.XU CN209880806U (en) | 2019-07-17 | 2019-07-17 | Square six-arm slot helical antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121357.XU CN209880806U (en) | 2019-07-17 | 2019-07-17 | Square six-arm slot helical antenna |
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| Publication Number | Publication Date |
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| CN209880806U true CN209880806U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921121357.XU Active CN209880806U (en) | 2019-07-17 | 2019-07-17 | Square six-arm slot helical antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212291A (en) * | 2019-07-17 | 2019-09-06 | 福州大学 | A kind of rectangular six arms Spiral slot antenna applied to satellite navigation terminal |
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2019
- 2019-07-17 CN CN201921121357.XU patent/CN209880806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212291A (en) * | 2019-07-17 | 2019-09-06 | 福州大学 | A kind of rectangular six arms Spiral slot antenna applied to satellite navigation terminal |
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Effective date of registration: 20230307 Address after: Floor 2, Building 7, Phase I, Innovation Park, No. 3, Keji East Road, High-tech Zone, Fuzhou, Fujian 350108 Patentee after: FUZHOU FUDA XINJIE ANTENNA TECHNOLOGY Co.,Ltd. Address before: No.2 Xueyuan Road, Fuzhou University Town, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee before: FUZHOU University |