CN212587714U - Miniaturized self-phase-shift broadband helical antenna applied to satellite navigation terminal - Google Patents
Miniaturized self-phase-shift broadband helical antenna applied to satellite navigation terminal Download PDFInfo
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Abstract
A miniaturized self-phase-shift broadband helical antenna applied to a satellite navigation terminal relates to the technical field of wireless communication. A miniaturized self-phase-shift broadband helical antenna applied to a satellite navigation terminal comprises a bottom surface dielectric slab and a side surface dielectric slab arranged around the bottom surface dielectric slab, wherein two groups of double-arm helical units are printed on the outer surface of the side surface dielectric slab in a surrounding mode; each group of the double-arm spiral units comprises two spiral arms; a self-phase-shift feed network is arranged on the bottom dielectric plate; the self-phase-shift feed network comprises two layers of feed networks which are centrosymmetric; two radiation arms of the feed network positioned on the upper layer are respectively connected with two spiral arms of the first group of double-arm spiral units; two radiation arms that are located the feed network of lower floor are connected with two spiral arms of second group both arms spiral unit respectively the utility model discloses guaranteed the bandwidth performance and the radiation efficiency of antenna when the antenna is miniaturized, and feed network is simple.
Description
Technical Field
The utility model belongs to the technical field of the wireless communication technique and specifically relates to a be applied to miniaturized self-phase shift broadband helical antenna at satellite navigation terminal.
Background
The satellite navigation system plays an important role in the fields of politics, economy, military and the like as a global autonomous space-based positioning satellite system. In a satellite navigation system, an antenna is not only a device for radiating and receiving radio waves, but also an energy converter, and its main function is to convert high-frequency current into electromagnetic waves to be radiated into free space or convert high-frequency electromagnetic waves into high-frequency current signals.
With the continuous and deep research of wireless communication systems, antenna products dominated by satellite positioning systems are receiving more and more attention, and the performance requirements for miniaturization, broadband, stability and the like are also stricter and stricter. Therefore, the antenna applied to the satellite navigation terminal is continuously developed toward miniaturization, portability, integration, and low cost.
The four-arm helical antenna has good circular polarization performance, has the characteristics of uniform heart-shaped radiation pattern, high front-to-back ratio and the like, has outstanding advantages, and has better low elevation angle performance compared with the traditional microstrip antenna, thereby having good application prospect and practical value in a satellite navigation system. However, the conventional quadrifilar helix antenna is not favorable for integration due to the complex feed network. Therefore, it is important to miniaturize the quadrifilar helix antenna and simplify the feed network.
For example, the invention is named as a miniaturized double-folded arm quadrifilar helix antenna for satellite navigation reception, which is published in patent application publication No. CN109546301A, 3 and 29 of 2019, this application discloses a satellite navigation is received and is used miniaturized double folded arm four arms helical antenna, including medium cylinder and the even four antenna arm groups of rotatory setting on the medium cylinder, every antenna arm group all includes the first antenna arm that extends to medium cylinder top and parallel arrangement each other from medium cylinder bottom tilt up, second antenna arm and third antenna arm, first antenna arm and second antenna arm are located the first connector of one end at medium cylinder top and connect, the one end that second antenna arm and third antenna arm are located medium cylinder bottom is passed through the second connector and is connected, be provided with first short circuit mouth on the second connector, the one end that first antenna arm is located medium cylinder bottom is connected with first feed port. Although the four-arm spiral antenna is miniaturized in volume by means of arm folding processing, medium loading and short circuit loading, the bandwidth performance and the radiation efficiency of the antenna are restrained to a certain extent, and a feed network is complex.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the bandwidth performance and the radiant efficiency of antenna have been suppressed when the antenna volume reduces among the prior art, and the complicated problem of feed network, have provided one kind and guaranteed the bandwidth performance and the radiant efficiency of antenna when the antenna is miniaturized, and the simple miniaturized self-phase shift broadband helical antenna who is applied to satellite navigation terminal of feed network.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a miniaturized self-phase-shift broadband helical antenna applied to a satellite navigation terminal comprises a bottom surface dielectric slab and a side surface dielectric slab arranged around the bottom surface dielectric slab, wherein two groups of double-arm helical units are printed on the outer surface of the side surface dielectric slab in a surrounding mode; each group of the double-arm spiral units comprises two spiral arms; a self-phase-shift feed network is arranged on the bottom dielectric plate; the self-phase-shift feed network comprises two layers of feed networks which are centrosymmetric; each layer of feed network comprises a self-phase-shift ring with a notch and two radiation arms connected to two ends of the notch of the self-phase-shift ring; the two layers of feed networks are connected through a coaxial feeder; two radiation arms of the feed network positioned on the upper layer are respectively connected with two spiral arms of the first group of double-arm spiral units; and two radiation arms of the feed network positioned at the lower layer are respectively connected with two spiral arms of the second group of double-arm spiral units.
The double-arm spiral unit comprises two spiral arms, so that the side dielectric plates have four spiral arms to form a four-arm spiral antenna, and the antenna is convenient to miniaturize. The self-phase-shift feed network comprises two layers of feed networks with simple structures, so that the cost is saved, the feed efficiency is improved, and the manufacture is convenient. The self-phase-shifting ring is provided with a gap so as not to generate short circuit when feeding. The external signal energy is fed in the two layers of connected feed networks through the coaxial feeder, in the feeding process, current generated by feeding is transmitted to the four radiation arms through the two self-phase-shifting rings, the four radiation arms are transmitted to the four connected spiral arms, and the four spiral arms re-radiate signals to the outside.
Preferably, the self-phase-shifting ring is shaped as a three-quarter ring, and two radiation arms respectively connected with two ends of the gap of the three-quarter ring are relatively vertical.
This arrangement makes it possible to achieve a uniform signal transmission in one direction on one layer of the radiating network.
Preferably, the notches of the self-phase-shift rings on the two layers of feed networks face opposite directions, so that the four radiation arms are uniformly distributed on the bottom dielectric plate.
The four radiation arms are uniformly distributed on the bottom surface dielectric plate, so that the circular polarization of the antenna is realized.
Preferably, one of the two radiating arms is connected to the outer edge of the notch on one side of the self-phase-shifting ring, and the other radiating arm is connected to the notch on the other side of the self-phase-shifting ring and extends to the center of the self-phase-shifting ring.
The arrangement is such that the external signals can be received from the center of the ring when received, and the reception is more comprehensive. And when feeding, due to the shape of the self-phase-shifting ring, the two radiation arms transmit current at different time, so that the connected double-arm spiral units generate phase difference.
Preferably, a coaxial line inner core is arranged at the center of the self-phase-shifting ring of the upper feeding network, a coaxial line outer core is arranged at the center of the self-phase-shifting ring of the lower feeding network, and the coaxial line inner core and the coaxial line outer core are connected through a coaxial feeder line.
The phase difference of 90 degrees of two spiral arms of the double-arm spiral unit is provided by the self-phase-shifting ring, and the phase difference of 180 degrees is provided by the coaxial line inner core and the coaxial line outer core, so that the sequential phase required by circular polarization can be realized. Compared with the traditional feed network which needs to provide phase difference by the length of the microstrip line, the feed network is greatly simplified, the miniaturization of the antenna is realized, and meanwhile, the bandwidth performance and the radiation efficiency are ensured.
Preferably, the upper part of the lateral medium plate is provided with an annular strip-shaped arm surrounding the whole lateral medium plate, and the spiral arms of the two groups of double-arm spiral units are connected to the annular strip-shaped arm.
The arrangement ensures that all spiral arm terminals are short-circuited, and the radiation efficiency of the antenna is ensured.
Preferably, the two groups of double-arm spiral units are arranged in a central symmetry manner, and each group of double-arm spiral units consists of two spiral arms which are symmetrical in front and back.
This arrangement better achieves circular polarization of the antenna.
Preferably, the spiral arms of the two groups of double-arm spiral units surround the whole medium layer from bottom to top.
The current generated by feed is coupled to the spiral arm through the feed network by the surrounding from bottom to top, so that signals can be radiated to the outside from bottom to top better, and an electromagnetic field generated by radiation is rotary, thereby realizing circular polarization and being more suitable for being applied to terminal equipment of a satellite navigation system.
Preferably, the spiral arms of the two sets of double-arm spiral units do not cross each other.
The spiral arm can better radiate signals to the outside, the radiation direction is more coordinated, and the arrangement also enables the electromagnetic field generated by radiation to be rotary and better in circular polarization.
Preferably, the total length of the spiral arm and the connected radiating arm of the two-arm spiral unit is L, L = n × λ, λ is a half wavelength of the central frequency of the antenna operating band, and n is a positive integer.
The total length of the spiral arm of the double-arm spiral unit and the connected radiation arm is integral multiple of half wavelength of the central frequency of an antenna working frequency band, resonance is convenient to generate, and an electric field generated by the spiral arm is larger and radiation is stronger.
Compared with the prior art, the utility model has the advantages that:
(1) the self-phase-shift feed network comprises a two-layer feed network with a simple structure, so that the cost is saved, the manufacture is convenient, the feed efficiency is improved, and the gain bandwidth range is widened.
(2) The double-arm spiral unit comprises two spiral arms, so that the side dielectric plates have four spiral arms to form a four-arm spiral antenna, and the antenna is convenient to miniaturize.
(3) The shape of the self-phase-shifting ring is a three-quarter ring, two radiation arms respectively connected with two ends of a notch of the three-quarter ring are relatively vertical, and the notches of the self-phase-shifting rings on the two layers of feed networks face opposite directions, so that the four radiation arms are uniformly distributed on the bottom surface dielectric plate, and the circular polarization of the antenna is better realized.
(4) One of the two radiation arms is connected to the outer edge of the notch on one side of the self-phase-shifting ring, the other radiation arm is connected to the notch on the other side of the self-phase-shifting ring and extends to the ring center of the self-phase-shifting ring, and the radiation arms on the ring center of the self-phase-shifting ring of the two-layer feed network are connected through a coaxial feeder line. Therefore, the external signals can be received from the center of the ring when being received, and the receiving is more comprehensive. And when feeding, due to the shape of the self-phase-shifting ring, the two radiation arms transmit current at different time, so that the connected double-arm spiral units generate phase difference. The phase difference of 90 degrees of two spiral arms of the double-arm spiral unit is provided by the self-phase-shifting ring, and the phase difference of 180 degrees is provided by the inner core and the outer core of the coaxial line, so that the sequential phase required by circular polarization can be realized. Compared with the traditional feed network which needs to provide phase difference by the length of the microstrip line, the feed network is greatly simplified, the miniaturization of the antenna is realized, and meanwhile, the bandwidth performance and the radiation efficiency are ensured.
(5) The upper part of the side dielectric slab is provided with an annular strip-shaped arm surrounding the whole side dielectric slab, and the spiral arms of the two groups of double-arm spiral units are connected to the annular strip-shaped arm. The arrangement ensures that all spiral arm terminals are short-circuited, and the radiation efficiency of the antenna is ensured.
(6) The spiral arms of the two groups of double-arm spiral units surround the whole medium layer from bottom to top. The spiral arms of the two groups of double-arm spiral units are not connected with each other. The surrounding from bottom to top enables the current generated by the feed to be coupled to the spiral arm through the feed network, so that the radiation signals from bottom to top can be better radiated to the outside, the radiation direction is more coordinated, the electromagnetic field generated by radiation is rotary, the circular polarization is realized, the gain bandwidth range is wider, the antenna is more suitable for being applied to satellite navigation system terminal equipment, and the antenna can cover a GPS L1 frequency band, a Beidou B1 frequency band and a GLONASS L1 frequency band.
(7) The total length of the spiral arm of the double-arm spiral unit and the connected radiation arm is integral multiple of half wavelength of the central frequency of an antenna working frequency band, resonance is convenient to generate, and an electric field generated by the spiral arm is larger and radiation is stronger.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a front view of an embodiment of the present invention.
Fig. 3 is a top bottom view of the embodiment of the present invention.
Fig. 4 is a bottom view of the embodiment of the present invention.
Fig. 5 is a side and bottom expanded view of an embodiment of the present invention.
Fig. 6 is a diagram of a simulation result of reflection coefficients according to an embodiment of the present invention.
Fig. 7 is a simulation result diagram of the circular polarization axial ratio bandwidth according to the embodiment of the present invention.
Fig. 8 is a right-handed radiation pattern of the embodiment of the present invention in the beidou B1 frequency band.
Fig. 9 is a right-hand radiation pattern of the embodiment of the present invention in the GPS L1 frequency band.
Fig. 10 is a right-hand radiation pattern of the GLONASS L1 frequency band according to an embodiment of the present invention.
In the figure: 1-side dielectric plate, 2-bottom dielectric plate, 3-first group of double-arm spiral units, 4-second group of double-arm spiral units, 5-upper layer feed network, 51-upper layer self-phase-shift ring, 52-upper layer radiation arm, 6-lower layer feed network, 61-lower layer self-phase-shift ring, 62-lower layer radiation arm, 7-annular strip arm, 8-coaxial line inner core and 9-coaxial line outer core.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1-5, a miniaturized self-phase-shifting wideband helical antenna applied to a satellite navigation terminal includes a bottom dielectric plate 2 and a side dielectric plate 1 disposed around the bottom dielectric plate 2, wherein two sets of double-arm helical elements are printed on an outer surface of the side dielectric plate 1 in a surrounding manner; each group of the double-arm spiral units comprises two spiral arms; a self-phase-shift feed network is arranged on the bottom dielectric plate 2; the self-phase-shift feed network comprises two layers of feed networks which are centrosymmetric; each layer of feed network comprises a self-phase-shift ring with a notch and two radiation arms connected to two ends of the notch of the self-phase-shift ring; the two layers of feed networks are connected through a coaxial feeder; two radiation arms of the feed network positioned on the upper layer are respectively connected with two spiral arms of the first group of double-arm spiral units 3; two radiation arms of the feed network at the lower layer are respectively connected with two spiral arms of the second group of double-arm spiral units 4.
Two groups of double-arm spiral units are printed on the outer surface of the lateral dielectric plate 1 in a surrounding mode. The double-arm spiral units comprise two spiral arms, so that the side dielectric plate 1 has four spiral arms in total to form a four-arm spiral antenna, and the arrangement is convenient for miniaturization of the antenna. The self-phase-shift feed network comprises two layers of feed networks with simple structures, so that the cost is saved, the feed efficiency is improved, and the manufacture is convenient. The self-phase-shifting ring is provided with a gap so as not to generate short circuit when feeding. The external signal energy is fed in the two layers of connected feed networks through the coaxial feeder, in the feeding process, current generated by feeding is transmitted to the four radiation arms through the two self-phase-shifting rings, the four radiation arms are transmitted to the four connected spiral arms, and the four spiral arms re-radiate signals to the outside.
For example, the self-phase-shifting ring can be a square ring, or a circular ring as shown in fig. 1, so that the material is saved and the current is smoothly transmitted. Then, the self-phase shift ring is not limited to a square ring, a circular ring, but may be an elliptical ring, other polygonal rings, and the like.
The self-phase-shift feed network can be arranged on the front surface or the back surface of the bottom surface dielectric plate 2, and the effects are the same. The self-phase-shift feed network comprises an upper feed network 5 and a lower feed network 6. The upper layer feed network 5 and the lower layer feed network 6 are centrosymmetric. The upper feed network 5 includes an upper self-phase-shifting loop 51 and two upper radiation arms 52 connected to the upper self-phase-shifting loop 51. The lower feed network 6 comprises a lower self-phase shifting loop 61 and two lower radiating arms 62 connected to the lower self-phase shifting loop 61. The upper layer feed network 5 is connected with the lower layer feed network 6 through a coaxial feed line. The two upper radiation arms 52 are connected to the two spiral arms of a set of two-arm spiral units, respectively. The two lower radiation arms 62 are connected to the two spiral arms of the other set of double-arm spiral units, respectively.
The upper and lower self-phase-shifting rings 51, 61 are three-quarter rings in shape. Two opposite vertical upper radiation arms 52 are respectively connected to two ends of the gap of the upper self-phase-shifting ring 51. Two opposite vertical lower radiation arms 62 are respectively connected to two ends of the notch of the lower self-phase-shifting ring 61. The notches of the upper layer self-phase-shifting ring 51 and the lower layer self-phase-shifting ring 61 are opposite in direction, so that the two upper layer radiation arms 52 and the two lower layer radiation arms 62 are uniformly distributed on the bottom surface dielectric plate 2, and the circular polarization of the antenna is realized. One of the two upper radiation arms 52 is connected to the outer edge of the upper self-phase-shifting ring 51 at a notch on one side, and the other upper radiation arm 52 is connected to the upper self-phase-shifting ring 51 at a notch on the other side and extends to the center of the upper self-phase-shifting ring 51. One of the two lower radiation arms 62 is connected to the outer edge of the lower self-phase-shifting ring 61 at a notch on one side, and the other lower radiation arm 62 is connected to the lower self-phase-shifting ring 61 at a notch on the other side and extends to the center of the lower self-phase-shifting ring 61. The arrangement is such that the external signals can be received from the center of the ring when received, and the reception is more comprehensive. The coaxial line inner core 8 is arranged at the center of the self-phase-shifting ring of the upper feeding network 5, the coaxial line outer core 9 is arranged at the center of the self-phase-shifting ring of the lower feeding network 6, and the coaxial line inner core 8 and the coaxial line outer core 9 are connected through a coaxial feeder line. And when feeding, due to the shape of the self-phase-shifting ring, the two radiation arms transmit current at different time, so that the connected double-arm spiral units generate phase difference. The phase difference of 90 degrees of two spiral arms of the double-arm spiral unit is provided by the self-phase-shifting ring, and the phase difference of 180 degrees is provided by the inner core and the outer core of the coaxial line, so that the sequential phase required by circular polarization can be realized. Compared with the traditional feed network which needs to provide phase difference by the length of the microstrip line, the feed network is greatly simplified, the miniaturization of the antenna is realized, and meanwhile, the bandwidth performance and the radiation efficiency are ensured.
The bottom dielectric sheet 2 and the side dielectric sheet 1 are made of FR4 sheet, Rogers sheet or metallocene sheet, and FR4 sheet is used herein.
For example, the bottom dielectric sheet 2 may be circular, with spiral arms closed around the edges of the bottom dielectric sheet 2, and both the spiral arms and the bottom dielectric sheet 2 forming a cylindrical structure. For another example, as shown in fig. 1, the bottom dielectric sheet 2 is square, the spiral arms are closed around the edges of the bottom dielectric sheet 2, and both the side dielectric sheets 1 and the bottom dielectric sheet 2 form a cube. The bottom dielectric plate 2 is not limited to a circular shape or a square shape, and may have an elliptical shape or another polygonal shape.
For example, the spiral arm may be a stepped arm, or may be a meandering arm as shown in fig. 1. The width of the single spiral arm can be gradually changed, namely gradually widened or gradually narrowed, or the width can be fixed as shown in fig. 1, and the fixed width enables the transmitted information not to be easily lost and the antenna radiation signal to be more stable. Each spiral arm can be spiral according to different angles, or spiral according to the same fixed angle as shown in fig. 5, the spiral with the same fixed angle can make the antenna radiation signal more uniform after going out, and the signal intensity in each direction is the same in the circular polarization range. The surrounding directions of each spiral arm are the same, and the arrangement enables signals radiated by the antenna to form circular polarization and the signals to be not easy to interfere with each other when being radiated, so that the radiation is more stable. The spacing between each spiral arm may not be equidistant, or may be equidistant as shown in fig. 5, and the equidistant arrangement makes the antenna radiation signal more uniform, which is beneficial for comparing the equalized circular polarization. The spiral arm may be bent around the side surface dielectric plate 1, for example, in fig. 1, secondary bending is performed along the side surface dielectric plate 1, so that feeding is more uniform on each surface of the side surface dielectric plate 1, and the spiral arm is bent or not bent for different times according to different shapes formed by the side surface dielectric plate 1 and the bottom surface dielectric plate 2.
The upper part of the side dielectric slab 1 is provided with an annular strip-shaped arm 7 surrounding the whole side dielectric slab 1, and the spiral arms of the two groups of double-arm spiral units are connected to the annular strip-shaped arm 7, so that all the spiral arm terminals are short-circuited, and the radiation efficiency of the antenna is ensured. The two groups of double-arm spiral units are arranged in a central symmetry manner, and each group of double-arm spiral units consists of two spiral arms which are symmetrical in front and back. This arrangement better achieves circular polarization of the antenna. The spiral arms of the two groups of double-arm spiral units surround the whole medium layer from bottom to top and are not mutually connected. The current generated by feed is coupled to the spiral arm through the feed network by the surrounding from bottom to top, so that the signals can be better radiated from bottom to top to the outside, the radiation direction is more coordinated, and the electromagnetic field generated by radiation is rotary, thereby realizing circular polarization and being more suitable for being applied to terminal equipment of a satellite navigation system. The total length of the spiral arm of the double-arm spiral unit and the connected radiation arm is half wavelength of the central frequency of the working frequency band of the antenna, so that resonance is generated conveniently, an electric field generated by the spiral arm is larger, and radiation is stronger.
Fig. 6 is a diagram of a simulation result of reflection coefficients of a miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal. Fig. 7 is a diagram showing simulation results of circular polarization axial ratio bandwidth of a miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal. Fig. 8 is a right-hand radiation pattern of a miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal in the beidou B1 frequency band. Fig. 9 is a right-handed radiation pattern of a miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal in a GPS L1 frequency band. FIG. 10 is a right-hand radiation pattern of a miniaturized self-phase-shifting wideband helical antenna applied to a satellite navigation terminal in the GLONASS L1 frequency band. These graphs show that the helical antenna ensures bandwidth performance and radiation efficiency while achieving miniaturization of the antenna.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A miniaturized self-phase-shift broadband helical antenna applied to a satellite navigation terminal comprises a bottom dielectric plate and a side dielectric plate arranged around the bottom dielectric plate, and is characterized in that two groups of double-arm helical units are printed on the outer surface of the side dielectric plate in a surrounding mode; each group of the double-arm spiral units comprises two spiral arms; a self-phase-shift feed network is arranged on the bottom dielectric plate; the self-phase-shift feed network comprises two layers of feed networks which are centrosymmetric; each layer of feed network comprises a self-phase-shift ring with a notch and two radiation arms connected to two ends of the notch of the self-phase-shift ring; the two layers of feed networks are connected through a coaxial feeder; two radiation arms of the feed network positioned on the upper layer are respectively connected with two spiral arms of the first group of double-arm spiral units; and two radiation arms of the feed network positioned at the lower layer are respectively connected with two spiral arms of the second group of double-arm spiral units.
2. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal of claim 1, wherein the self-phase-shifting loop is shaped as a three-quarter loop, and two radiation arms respectively connected with two ends of a gap of the three-quarter loop are perpendicular to each other.
3. The miniaturized self-phase-shifting broadband helical antenna applied to the satellite navigation terminal according to claim 2, wherein notches of the self-phase-shifting rings on the two layers of feed networks are opposite in direction, so that the four radiation arms are uniformly distributed on the bottom surface dielectric plate.
4. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal as claimed in claim 2, wherein one of the two radiation arms is connected to the outer edge of the self-phase-shifting ring at the notch on one side, and the other radiation arm is connected to the notch on the other side of the self-phase-shifting ring and extends to the center of the self-phase-shifting ring.
5. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal according to claim 1, wherein a coaxial line inner core is arranged at the center of the self-phase-shifting ring of the upper feeding network, a coaxial line outer core is arranged at the center of the self-phase-shifting ring of the lower feeding network, and the coaxial line inner core and the coaxial line outer core are connected through a coaxial feeder line.
6. The miniaturized self-phase-shifting wideband helical antenna applied to a satellite navigation terminal as claimed in claim 1, wherein the upper portion of the lateral dielectric plate is provided with an annular strip-shaped arm surrounding the whole lateral dielectric plate, and the helical arms of the two sets of double-arm helical elements are connected to the annular strip-shaped arm.
7. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal as claimed in claim 1, wherein the two sets of double-arm helical units are arranged in central symmetry, and each set of double-arm helical unit is composed of two helical arms which are symmetrical back and forth.
8. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal as claimed in claim 1, wherein the helical arms of the two sets of two-arm helical units surround the whole medium layer from bottom to top.
9. The miniaturized self-phase-shifting wideband helical antenna applied to a satellite navigation terminal as claimed in claim 8, wherein the helical arms of the two sets of two-arm helical units do not intersect with each other.
10. The miniaturized self-phase-shifting broadband helical antenna applied to a satellite navigation terminal of claim 1, wherein the total length of the helical arm and the connected radiation arm of the two-arm helical unit is L, L = n x λ, λ is a half wavelength of a center frequency of an antenna operating band, and n is a positive integer.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067127A (en) * | 2021-03-12 | 2021-07-02 | 中国电子科技集团公司第二十九研究所 | Satellite-borne helical antenna feed structure and helical antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113067127A (en) * | 2021-03-12 | 2021-07-02 | 中国电子科技集团公司第二十九研究所 | Satellite-borne helical antenna feed structure and helical antenna |
| CN113067127B (en) * | 2021-03-12 | 2022-04-19 | 中国电子科技集团公司第二十九研究所 | Satellite-borne helical antenna feed structure and helical antenna |
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