CN110770972B - Antenna and unmanned aerial vehicle - Google Patents
Antenna and unmanned aerial vehicle Download PDFInfo
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- CN110770972B CN110770972B CN201880038872.3A CN201880038872A CN110770972B CN 110770972 B CN110770972 B CN 110770972B CN 201880038872 A CN201880038872 A CN 201880038872A CN 110770972 B CN110770972 B CN 110770972B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/285—Aircraft wire antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
- H01Q5/15—Resonant antennas for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
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Abstract
An antenna (100) and an unmanned aerial vehicle (1000) include a feed point (10), a high frequency radiating element (20), and a low frequency radiating element (30). One end of the high-frequency radiation unit (20) is connected to the feeding point (10). The low-frequency radiation unit (30) comprises a first low-frequency connecting section (31), an inductor (33) and a second low-frequency connecting section (35). One end of the first low frequency connection segment (31) is connected to the feeding point (10). The first low-frequency connecting section (31), the inductor (33) and the second low-frequency connecting section (35) are connected in sequence. The width of the second low-frequency connecting section (35) is gradually widened from the starting end connected with the inductor (33) to the tail end of the second low-frequency connecting section (35).
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna and an unmanned aerial vehicle.
Background
Antennas are important components of spatial signal transmission. With the popularization of smart devices and the demand for miniaturization of smart device sizes, the demand for miniaturization of antenna sizes is also increasing. Current approaches to antenna miniaturization designs can add physical weight to the antenna or result in a loss of performance of the antenna. Taking the dipole antenna as an example, the dipole antenna is usually miniaturized by bending or increasing the dielectric constant of the dielectric substrate and the thickness of the plate material, but such miniaturization reduces the bandwidth of the antenna or increases the weight of the antenna.
Disclosure of Invention
The embodiment of the invention provides an antenna and an unmanned aerial vehicle.
The antenna of the embodiment of the invention comprises a feeding point, a high-frequency radiation unit and a low-frequency radiation unit. One end of the high-frequency radiation unit is connected with the feeding point. The low frequency radiating element comprises a first low frequency connecting section, an inductor and a second low frequency connecting section, one end of the first low frequency connecting section is connected with the feeding point, the first low frequency connecting section is sequentially connected with the inductor and the second low frequency connecting section, and the width of the second low frequency connecting section is gradually widened from the starting end connected with the inductor to the tail end of the second low frequency connecting section.
The unmanned aerial vehicle comprises an unmanned aerial vehicle body and an antenna. The antenna sets up on the unmanned aerial vehicle body. The antenna includes a feeding point, a high frequency radiating element, and a low frequency radiating element. One end of the high-frequency radiation unit is connected with the feeding point. The low frequency radiating element comprises a first low frequency connecting section, an inductor and a second low frequency connecting section, one end of the first low frequency connecting section is connected with the feeding point, the first low frequency connecting section is sequentially connected with the inductor and the second low frequency connecting section, and the width of the second low frequency connecting section is gradually widened from the starting end connected with the inductor to the tail end of the second low frequency connecting section.
According to the antenna and the unmanned aerial vehicle, the inductance is added in the low-frequency radiation unit, and the width of the low-frequency radiation unit is designed to be in a width gradual change mode, so that the antenna can be miniaturized, the bandwidth of the antenna can be increased, and the performance of the antenna can be improved.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of the structure of an antenna according to some embodiments of the present invention.
Fig. 2 is an impedance plot of an antenna of some embodiments of the present invention.
Fig. 3 is a standing wave ratio diagram for an antenna of some embodiments of the present invention.
Fig. 4 is a pattern of the low frequency radiating elements of the antenna of some embodiments of the present invention.
Fig. 5 is a pattern diagram of a high frequency radiating element of an antenna of some embodiments of the present invention.
Fig. 6 is a schematic structural diagram of a drone according to some embodiments of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1, an antenna 100 is provided. The antenna 100 includes a feeding point 10, a high frequency radiation element 20, and a low frequency radiation element 30. One end of the high-frequency radiating element 20 is connected to the feeding point 10. The low frequency radiating element 30 includes a first low frequency connecting section 31, an inductor 33 and a second low frequency connecting section 35. One end of the first low frequency connection segment 31 is connected to the feeding point 10. The first low-frequency connecting section 31, the inductor 33 and the second low-frequency connecting section 35 are connected in sequence. The width of the second low frequency connection section 35 gradually becomes wider from the start end a connected to the inductor 33 to the end B of the second low frequency connection section 35.
Specifically, the antenna 100 is a dipole antenna, the number of the high-frequency radiation elements 20 is two, and the number of the low-frequency radiation elements 32 is also two.
The feeding point 10 comprises a feeding point 11 and a grounding point 13. As shown in fig. 1, the feeding point 11 is located on the left half of the antenna 100, and the grounding point 13 is located on the right half of the antenna 100. The feed point 10 is an interface of the antenna 100 and a feeder for connecting the antenna 100 and the feeder. The feeder connects the antenna 100 and the transceiving system. When the antenna 100 is used as a transmitting antenna, a transmitter in a transceiving system outputs high-frequency current energy (or guided wave energy), the high-frequency current energy is transmitted to the antenna 100 through a feeder, and the antenna 100 converts the high-frequency current energy into electromagnetic wave energy and radiates the electromagnetic wave energy into space. When the antenna 100 is used as a receiving antenna, the antenna 100 converts electromagnetic wave signals transmitted from the space into high-frequency current energy (or guided wave energy), and the high-frequency current energy is transmitted to a receiver through a feeder.
Each high-frequency radiation unit 20 includes two high-frequency radiation sections 21. The two high-frequency radiation portions 21 in each radiation unit 20 are symmetrical with respect to the low-frequency radiation unit 30. Wherein each of the high-frequency radiation sections 21 includes a first high-frequency connection section 211 and a second high-frequency connection section 213, one end of the first high-frequency connection section 211 is connected to the feeding point 10, and the other end of the first high-frequency connection section 211 is connected to the second high-frequency connection section 213. Each of the first high-frequency connection segments 211 is perpendicular to the extending direction of the low-frequency radiating element 30, and each of the second high-frequency connection segments 213 is identical to and parallel to the extending direction of the low-frequency connection segment 30. Specifically, as in the antenna 100 shown in fig. 1, the left two high-frequency radiating portions 21 are symmetrical with respect to the left low-frequency radiating element 30, and the right two high-frequency radiating portions 21 are symmetrical with respect to the right low-frequency radiating element 30. In the left high-frequency radiating element 20, one end of each of the two first high-frequency connecting segments 211 is connected to the feed point 11; in the high-frequency radiation unit 20 on the right side, one ends of both the first high-frequency connection sections 211 are connected to the ground point 13.
In this way, the first high-frequency connecting section 211 is designed to be perpendicular to the extending direction of the low-frequency radiating unit 30, and the second high-frequency connecting section 213 is designed to be consistent with and parallel to the extending direction of the low-frequency radiating unit 30, so that on one hand, the interval between the high-frequency radiating unit 20 and the low-frequency radiating unit 30 can be increased, the mutual influence between the high-frequency radiating unit 20 and the low-frequency radiating unit 30 can be correspondingly reduced, and the high-frequency radiating unit 20 and the low-frequency radiating unit 30 are ensured to have good radiation performance. In addition, by providing two high-frequency radiating portions 21 symmetrical with respect to the low-frequency radiating element 30 in each high-frequency radiating element 20, it is possible to increase the symmetry of the structure of the antenna 100, improve the impedance matching between the high-frequency radiating element 20 and the feed line, reduce the standing wave ratio, and improve the radiation performance of the high-frequency radiating element 20.
Each low-frequency radiating unit 30 is composed of a first low-frequency connecting section 31, an inductor 33 and a second low-frequency connecting section 35, and the first low-frequency connecting section 31, the inductor 33 and the second low-frequency connecting section 35 are connected in sequence. Specifically, in the left low-frequency radiating element 30, one end of the first low-frequency connecting section 31 is connected to the feed point 11, the other end of the first low-frequency connecting section 31 is connected to the inductor 33, and the end of the inductor 33 opposite to the first low-frequency connecting section 31 is connected to the second low-frequency connecting section 35. In the right low-frequency radiating element 30, one end of the first low-frequency connecting section 31 is connected to the ground point 13, the other end of the first low-frequency connecting section 31 is connected to the inductor 33, and the end of the inductor 33 opposite to the first low-frequency connecting section 31 is connected to the second low-frequency connecting section 35.
Wherein the length of the first low frequency connection section 31 is adjustable. Specifically, for the low-frequency radiation element 30 on the left side of the antenna 100, the distance between the end point of the inductor 33 connected with the first low-frequency connecting section 31 and the feed point 11 is adjustable, and for the low-frequency radiation element 30 on the right side of the antenna 100, the distance between the end point of the inductor 33 connected with the first low-frequency connecting section 31 and the grounding point 13 is adjustable. The length of the first low frequency connection segment 31 is related to the inductance value of the antenna 100. It can be understood that, in the design of the antenna, when the total length of the low-frequency radiation part of the antenna is one fourth of the wavelength of the electromagnetic wave radiated by the low-frequency radiation part, the antenna is purely resistive, and does not reflect the high-frequency current energy back to the signal source, and the radiation efficiency of the antenna is high. However, in the miniaturized design of the antenna, if the total length of the low-frequency radiating portion of the antenna is directly reduced, so that the total length of the low-frequency radiating portion is less than a quarter of the wavelength of the electromagnetic wave radiated by the low-frequency radiating portion, the impedance of the antenna is capacitive at this time, and the high-frequency current energy transmitted to the antenna through the feed line is reflected back to the signal source, thereby greatly reducing the radiation efficiency of the antenna. Therefore, in the miniaturized design of the antenna 100 according to the embodiment of the present invention, the length of the first low-frequency connecting section 31 may be adjusted, so as to change the inductance value of the antenna 100, for example, when the length of the low-frequency radiating element 30 is reduced to reduce the size of the antenna 100, in order to avoid the problem of reduction of radiation efficiency, the length of the first low-frequency connecting section 31 may be appropriately increased, so as to increase the inductance of the antenna, so that after the length of the low-frequency radiating element 30 is reduced, the impedance characteristic of the low-frequency radiating element 30 can be close to pure resistance, so as to generate resonance, and the radiation efficiency is not reduced.
The inductor 33 has any one of a serpentine bent structure, a spiral bent structure, and a wave-shaped bent structure. That is, the inductor 33 may have a serpentine bent structure, a spiral bent structure, or a wavy bent structure, which is not limited herein. Taking the inductor 33 with the serpentine bending structure shown in fig. 1 as an example, the serpentine bending structure of the inductor 33 increases the path of the current flowing into the inductor 33, and accordingly, the effective electrical length of the low-frequency radiating unit 30 can be increased, and the resonant frequency of the low-frequency radiating unit 30 can be decreased, so that the size of the low-frequency radiating unit 30 can be decreased. The number of bends of the inductor 33 is adjustable, and the number of bends of the inductor 33 can be determined according to the frequency band to be covered by the low frequency radiating unit 30 and the specific device to which the antenna 100 is applied. For example, when the antenna 100 is applied to a device with a relatively low demand for miniaturization of the antenna 100, the number of bends of the inductor 33 can be reduced appropriately; for another example, when the antenna 100 is applied to a case where the requirement for miniaturization of the antenna 100 is high and the frequency band corresponding to the low frequency radiating unit 30 is low, the number of bends of the inductor 33 may be increased appropriately.
The width of the second low frequency connection section 35 gradually becomes wider from the start end a connected to the inductor 33 to the end B of the second low frequency connection section 35. In particular, the width of the second low-frequency connection section 35 may be exponentially tapered. The width of the second low-frequency connecting section 35 is gradually widened, so that on one hand, the terminal inductance of the low-frequency radiating element 30 is increased, the path of the current flowing into the second low-frequency connecting section 35 is increased, the effective electrical length of the low-frequency radiating element 30 is correspondingly increased, and the size of the low-frequency radiating element 30 is reduced; on the other hand, when the width of the second low-frequency connecting segment 35 is gradually changed in an exponential manner, different portions of the low-frequency radiating unit 30 transmit or receive electromagnetic waves of different frequencies, and since the ratio of the wavelength of the different-frequency signal corresponding to each radiating portion to the actual low-frequency radiating unit 30 is not changed, the width of the low-frequency radiating unit 30 gradually changes in an exponential manner, so that more frequencies can be covered, and the bandwidth of the low-frequency radiating unit 30 can be improved.
Referring to fig. 1, the distance between the second high-frequency connecting sections 213 of the two high-frequency radiating portions 21 of the same high-frequency radiating unit 20 is equal to the width of the end of the second low-frequency connecting section 35. In this way, it is possible to secure a sufficiently wide opening of the end of the second low-frequency connection section 35 without increasing the longitudinal size of the antenna 100.
Referring to fig. 1, a connection line between the feeding point 11 and the grounding point 13 has a central line, two high frequency radiating units 20 are symmetrically disposed about the central line, and two low frequency radiating units 30 are symmetrically disposed about the central line. Thus, the antenna 100 has the largest opening angle, at this time, the current flowing through the high-frequency radiating unit 20 and the low-frequency radiating unit 30 on the side (the right side in fig. 1) where the grounding point 13 is located is the same as the current flowing through the high-frequency radiating unit 20 and the low-frequency radiating unit 30 on the side where the feeding point 11 is located, the high-frequency radiating unit 20 and the low-frequency radiating unit 30 connected to the grounding point 13 form a first radiating portion, the high-frequency radiating unit 20 and the low-frequency radiating unit 30 connected to the feeding point 11 form a second radiating portion, the directions of induced electromotive forces generated by the first radiating portion and the second radiating portion are the same, and the induced electromotive forces in the same directions are superposed, so that the antenna 100 has better directivity and better radiation performance.
The length of the antenna 100 according to the embodiment of the present invention may be up to 0.28 λ, that is, the distance between the ends of the two low frequency radiating elements 30 is 0.28 λ. Where λ is the wavelength of the electromagnetic wave radiated by the low-frequency radiation unit 30. It can be understood that the length of the antenna not designed for miniaturization is usually 0.5 λ, and the length of the antenna 100 of the embodiment of the present invention is shortened to 0.28 λ, and the size of the antenna 100 is significantly reduced, compared to the antenna not designed for miniaturization, i.e., compared to the antenna not loaded with the inductor 33 and not gradually widened in width of the low frequency radiation unit 30.
In the antenna 100 according to the embodiment of the present invention, the frequency band of the electromagnetic wave radiated by the high frequency radiation unit 20 and the frequency band of the electromagnetic wave radiated by the low frequency radiation unit 30 can be adjusted according to the actual requirements of the specific device to which the antenna 100 is applied. For example, when the antenna 100 is applied to a device such as an unmanned aerial vehicle 1000 (shown in fig. 6), an unmanned vehicle, and a smart robot, the device generally uses free 2.4GHz and 5.8GHz frequency bands for communication, in which case, the frequency band of the electromagnetic wave radiated by the low-frequency radiation unit 30 may be 2.400GHz to 2.4835GHz, and the frequency band of the electromagnetic wave radiated by the high-frequency radiation unit 20 may be 5.725GHz to 5.850 GHz. If the antenna 100 is applied to a device that performs communication using mobile network communication (2G, 3G, 4G, 5G, etc.), for example, the device to which the antenna 100 is applied performs communication using 2G (GSM900) and 4G (FDD-LTE), the frequency band of the electromagnetic wave radiated by the low-frequency radiation unit 30 may be 909MHz to 960MHz, and the frequency band of the electromagnetic wave radiated by the high-frequency radiation unit 20 may be 1755MHz to 1860 MHz.
Referring to fig. 2, fig. 2 is an impedance diagram of the antenna 100 according to the embodiment of the present invention, in which the horizontal axis represents the radiation frequency of the antenna 100 and the vertical axis represents the impedance value of the antenna 100. Fig. 2 is an impedance diagram obtained by taking an example of the frequency band of the electromagnetic wave radiated by the low-frequency radiation unit 30 being 2.400GHz to 2.4835GHz and the frequency band of the electromagnetic wave radiated by the high-frequency radiation unit 20 being 5.725GHz to 5.850 GHz. As can be seen from fig. 2, in the 2.4G frequency band, the resistance value of the low-frequency radiating element 30 is 37.6272 ohms (Ω), the reactance value is-0.9900 Ω, and is close to the ideal impedance matching value (i.e. the resistance is 50 Ω, and the reactance is 0 Ω), which indicates that the impedance matching between the low-frequency radiating element 30 of the antenna 100 and the feeder line is good, and the energy fed into the low-frequency radiating element 30 by the feeder line can be effectively absorbed and radiated by the low-frequency radiating element 30. In the 5.8G band, the resistance value of the high-frequency radiating element 20 is 65.9729 Ω, the reactance value is-16.4965 Ω, and is similar to the ideal impedance matching value (i.e. the resistance is 50 Ω, and the reactance is 0 Ω), which means that the impedance matching between the high-frequency radiating element 20 of the antenna 100 and the feeder is better, and the energy fed into the high-frequency radiating element 20 by the feeder can be effectively absorbed and radiated by the high-frequency radiating element 20.
Referring to fig. 3, fig. 3 is a standing wave ratio diagram of antenna 100 according to the embodiment of the present invention, in which the horizontal axis represents the radiation frequency of antenna 100 and the vertical axis represents the standing wave ratio of antenna 100. Fig. 3 is a standing wave ratio diagram obtained by taking an example that the frequency band of the electromagnetic wave radiated by the low-frequency radiation unit 30 is 2.400GHz to 2.4835GHz, and the frequency band of the electromagnetic wave radiated by the high-frequency radiation unit 20 is 5.725GHz to 5.850 GHz. As can be seen from fig. 3, in the 2.4G band, the standing wave ratio of the low-frequency radiating element 30 is less than 2, and in the 5.8G band, the standing wave ratio of the high-frequency radiating element 20 is also less than 2, which means that the impedance matching between the low-frequency radiating element 30 of the antenna 100 and the feeder is better, and the portion of the energy fed into the low-frequency radiating element 30 by the feeder is less reflected back to the feeder, and likewise, the impedance matching between the high-frequency radiating element 20 of the antenna 100 and the feeder is better, and the portion of the energy fed into the high-frequency radiating element 20 by the feeder is less reflected back to the feeder, so as to meet the requirement of the antenna 100 for the standing wave ratio.
Referring to fig. 4, fig. 4 is a directional diagram of the low-frequency radiation unit 30 of the antenna 100 according to the embodiment of the present invention, in which the solid line is a horizontal directional diagram and the dotted line is a pitch directional diagram. As can be seen from fig. 4, the omnidirectional characteristic of the low-frequency radiating element 30 of the antenna 100 is better. Therefore, the antenna 100 may be used in a device with high requirements on antenna omni-directionality, such as a drone 1000 (shown in fig. 6), an unmanned vehicle, or other non-fixed-point communication device.
Referring to fig. 5, fig. 5 is a directional diagram of the high-frequency radiation unit 20 of the antenna 100 according to the embodiment of the present invention, in which a solid line is a horizontal directional diagram and a dotted line is a pitch directional diagram. As can be seen from fig. 5, the high-frequency radiating element 20 of the antenna 100 also has a better omni-directionality. The antenna 100 may be used in a device requiring high antenna omni-directionality, such as a drone 1000 (shown in fig. 6), an unmanned vehicle, or other non-fixed point communication.
In summary, in the antenna 100 according to the embodiment of the present invention, the inductor 33 is added to the low-frequency radiating element 30, and the width of the low-frequency radiating element 30 is designed to be gradually changed, so that the antenna 100 can be miniaturized, the bandwidth of the antenna 100 can be increased, and the performance of the antenna 100 can be improved.
Of course, in some embodiments, if the device applied to the antenna 100 has low requirement on the omnidirectional characteristic of the antenna, at this time, the two high-frequency radiating elements 20 may not be symmetrically disposed about the central line, and the two low-frequency radiating elements 30 may not be symmetrically disposed about the central line. That is, the angle of the opening between the first radiating portion and the second radiating portion may be less than 180 degrees, and in this case, the antenna 100 forms a directional antenna, and the directional antenna 100 has a high gain.
Referring to fig. 6, the present invention further provides an unmanned aerial vehicle 1000. The drone 1000 includes the antenna 100 of any of the above embodiments and a drone body 200. Antenna 100 sets up on unmanned aerial vehicle body 200. In some embodiments, the drone body may include a foot rest (or landing gear) in which the antenna 100 may be disposed.
So, because antenna 200 is miniaturized, can integrate in unmanned aerial vehicle 1000 and can not occupy the more space of unmanned aerial vehicle 1000, further be favorable to unmanned aerial vehicle 1000's miniaturized design. In addition, the frequency band that antenna 100 covered is wider, and the omnidirectionality is better, can ensure the stability of communication under this kind of non-fixed communication form of unmanned aerial vehicle 1000.
In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.
Claims (14)
1. An antenna, characterized in that the antenna comprises:
a feed point;
the high-frequency radiating unit comprises two high-frequency radiating parts, the two high-frequency radiating parts are symmetrically arranged relative to the low-frequency radiating unit, each high-frequency radiating part comprises a first high-frequency connecting section and a second high-frequency connecting section, the first high-frequency connecting section is connected with the second high-frequency connecting section, and one end of the high-frequency radiating unit is connected with the feeding point; and
the low frequency radiating element, the low frequency radiating element includes first low frequency linkage segment, inductance and second low frequency linkage segment, the one end of first low frequency linkage segment is connected the feed point, first low frequency linkage segment the inductance second low frequency linkage segment connects gradually, the width of second low frequency linkage segment from with the initiating terminal that the inductance is connected extremely the end of second low frequency linkage segment is the gradual widen of index form, just the end of second low frequency linkage segment keeps extending along the direction of index curve, two it is parallel between the second high frequency linkage segment, two high frequency radiation portion the interval between the second high frequency linkage segment with the width at the end of second low frequency linkage segment equals.
2. The antenna according to claim 1, wherein each of the high-frequency radiating portions includes a first high-frequency connecting section and a second high-frequency connecting section, the first high-frequency connecting section having one end connected to the feeding point and the other end connected to the second high-frequency connecting section, the first high-frequency connecting section being perpendicular to an extending direction of the low-frequency radiating element, and the second high-frequency connecting section being parallel to the extending direction of the low-frequency radiating element.
3. The antenna of claim 1, wherein the inductor has any one of a serpentine-shaped bent structure, a spiral-shaped bent structure, and a wave-shaped bent structure.
4. The antenna of claim 3, wherein the length of the first low frequency connection segment is adjustable, and the number of bends of the inductor is adjustable.
5. The antenna of claim 2, wherein the antenna is a dipole antenna, the number of the high-frequency radiating elements and the number of the low-frequency radiating elements are two, and the feeding point comprises a feeding point and a grounding point; one end of the first low-frequency connecting section of one of the low-frequency radiating elements is connected with the feed point, and one ends of the two first high-frequency connecting sections of one of the high-frequency radiating elements are connected with the feed point; one end of the low-frequency connecting section of the other low-frequency radiating unit is connected with the grounding point, and one ends of the two first high-frequency connecting sections of the other high-frequency radiating unit are connected with the grounding point.
6. The antenna of claim 5, wherein a connection line between the feeding point and the grounding point has a central line, two of the high frequency radiating elements are symmetrically disposed about the central line, and two of the low frequency radiating elements are symmetrically disposed about the central line.
7. The antenna according to claim 5, wherein a distance between the ends of the two low frequency radiating elements is 0.28 λ, where λ is a wavelength of an electromagnetic wave radiated by the low frequency radiating elements.
8. A drone, characterized in that it comprises:
an unmanned aerial vehicle body; and
the antenna, the antenna setting is in on the unmanned aerial vehicle body, the antenna includes:
a feed point;
the high-frequency radiating unit comprises two high-frequency radiating parts, the two high-frequency radiating parts are symmetrically arranged relative to the low-frequency radiating unit, each high-frequency radiating part comprises a first high-frequency connecting section and a second high-frequency connecting section, the first high-frequency connecting section is connected with the second high-frequency connecting section, and one end of the high-frequency radiating unit is connected with the feeding point; and
the low frequency radiating element, the low frequency radiating element includes first low frequency linkage segment, inductance and second low frequency linkage segment, the one end of first low frequency linkage segment is connected the feed point, first low frequency linkage segment the inductance second low frequency linkage segment connects gradually, the width of second low frequency linkage segment from with the initiating terminal that the inductance is connected extremely the end of second low frequency linkage segment is the gradual widen of index form, just the end of second low frequency linkage segment keeps extending along the direction of index curve, two it is parallel between the second high frequency linkage segment, two high frequency radiation portion the interval between the second high frequency linkage segment with the width at the end of second low frequency linkage segment equals.
9. The unmanned aerial vehicle of claim 8, wherein each high-frequency radiating portion comprises a first high-frequency connecting section and a second high-frequency connecting section, one end of the first high-frequency connecting section is connected with the feeding point, the other end of the first high-frequency connecting section is connected with the second high-frequency connecting section, the first high-frequency connecting section is perpendicular to the extending direction of the low-frequency radiating unit, and the second high-frequency connecting section is parallel to the extending direction of the low-frequency radiating unit.
10. The unmanned aerial vehicle of claim 8, wherein the inductor is any one of a serpentine-shaped bent structure, a spiral-shaped bent structure and a wave-shaped bent structure.
11. The unmanned aerial vehicle of claim 10, wherein the length of the first low frequency connection section is adjustable, and the number of bends in the inductor is adjustable.
12. The unmanned aerial vehicle of claim 9, wherein the antenna is a dipole antenna, the number of the high frequency radiating elements and the number of the low frequency radiating elements are both two, and the feed point comprises a feed point and a ground point; one end of the first low-frequency connecting section of one of the low-frequency radiating elements is connected with the feed point, and one ends of the two first high-frequency connecting sections of one of the high-frequency radiating elements are connected with the feed point; one end of the low-frequency connecting section of the other low-frequency radiating unit is connected with the grounding point, and one ends of the two first high-frequency connecting sections of the other high-frequency radiating unit are connected with the grounding point.
13. The drone of claim 12, wherein a line connecting the feed point and the ground point has a centerline, the two high frequency radiating elements are symmetrically disposed about the centerline, and the two low frequency elements are symmetrically disposed about the centerline.
14. The drone of claim 13, wherein the distance between the ends of the two low frequency radiating elements is 0.28 λ, where λ is the wavelength of the electromagnetic waves radiated by the low frequency radiating elements.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/101773 WO2020037558A1 (en) | 2018-08-22 | 2018-08-22 | Antenna and unmanned aerial vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110770972A CN110770972A (en) | 2020-02-07 |
| CN110770972B true CN110770972B (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880038872.3A Expired - Fee Related CN110770972B (en) | 2018-08-22 | 2018-08-22 | Antenna and unmanned aerial vehicle |
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| Country | Link |
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| CN (1) | CN110770972B (en) |
| WO (1) | WO2020037558A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909504A (en) * | 2021-03-22 | 2021-06-04 | 深圳市道通智能航空技术股份有限公司 | Antenna, debugging method thereof, external antenna structure and unmanned aerial vehicle |
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| CN101872893B (en) * | 2009-04-27 | 2013-04-03 | 宏达国际电子股份有限公司 | Multi-loop antenna structure and hand-held electronic device applied to same |
| CN201820881U (en) * | 2010-07-12 | 2011-05-04 | 佛山市迪安通讯设备有限公司 | Dual-frequency omnidirectional antenna |
| CN202167611U (en) * | 2011-05-27 | 2012-03-14 | 神讯电脑(昆山)有限公司 | Three-frequency antenna |
| CN203503784U (en) * | 2013-09-28 | 2014-03-26 | 广州创锦通信技术有限公司 | Broadband PCB antenna |
| TWI581508B (en) * | 2015-12-14 | 2017-05-01 | 亞旭電腦股份有限公司 | Lte antenna sturcture |
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- 2018-08-22 WO PCT/CN2018/101773 patent/WO2020037558A1/en active Application Filing
- 2018-08-22 CN CN201880038872.3A patent/CN110770972B/en not_active Expired - Fee Related
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| US4860019A (en) * | 1987-11-16 | 1989-08-22 | Shanghai Dong Hai Military Technology Engineering Co. | Planar TV receiving antenna with broad band |
| CN2735559Y (en) * | 2003-08-15 | 2005-10-19 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| EP1703589A1 (en) * | 2005-03-17 | 2006-09-20 | Fujitsu Ltd. | Tag antenna |
| CN106184707A (en) * | 2016-07-27 | 2016-12-07 | 深圳市天鼎微波科技有限公司 | A kind of unmanned plane structure with antenna assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020037558A1 (en) | 2020-02-27 |
| CN110770972A (en) | 2020-02-07 |
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