CN214898855U - Antenna, external antenna structure and unmanned aerial vehicle - Google Patents

Abstract

The embodiment of the utility model provides an antenna technical field especially relates to antenna, external antenna structure and unmanned aerial vehicle. The antenna includes: a substrate having at least one planar substrate surface; a first radiation section provided on the substrate surface, the first radiation section including: a first vibrator and a second vibrator facing opposite directions; the first and second vibrators include: the vibrator body is composed of a plurality of enclosing structures; at least one part of the adjacent enclosing structures are overlapped to form a communicated vibrator main body; one or more of the enclosing structures forming the vibrator main body are provided with openings so that the vibrator main body forms a bent snake-shaped structure. The antenna adopts reasonable wiring and structural design, and can meet the use requirement of the multi-band antenna on a substrate with smaller volume. And moreover, the antenna debugging process is simpler and quicker in wiring mode.

Description

Antenna, external antenna structure and unmanned aerial vehicle

[ technical field ] A method for producing a semiconductor device

The utility model relates to an antenna structure technical field especially relates to an antenna, external antenna structure and unmanned aerial vehicle.

[ background of the invention ]

The antenna is a key component for realizing the transceiving of electromagnetic wave wireless signals. The performance of the wireless data transmission system has great influence on equipment such as unmanned planes and the like which need remote wireless data transmission. With the continuous development of society, the frequency bands used in wireless transmission are more and more, and the demand for multiband antennas is more and more.

Under the condition that the frequencies of a plurality of antenna frequency bands are relatively close, the antenna with a complex structural design is often needed to meet the use requirement.

However, these antennas with complex structural designs are difficult to be applied to small products such as drones and remote controllers sensitive to size and structure. Moreover, the difficulty of the antenna debugging process and the time required for the debugging are also increased.

[ summary of the invention ]

The embodiment of the utility model provides an aim at providing an antenna, external antenna structure and unmanned aerial vehicle, can solve the defect that current multifrequency antenna exists.

In order to solve the above technical problem, an embodiment of the present invention provides the following technical solution: an antenna is provided.

The antenna includes:

a substrate having at least one planar substrate surface;

a first radiation section provided on the substrate surface, the first radiation section including: a first vibrator and a second vibrator facing opposite directions;

the first and second vibrators include: the vibrator body is composed of a plurality of enclosing structures;

at least one part of the adjacent enclosing structures are overlapped to form a communicated vibrator main body; one or more of the enclosing structures forming the vibrator main body are provided with openings so that the vibrator main body forms a bent snake-shaped structure.

Optionally, the enclosing structure is a rectangle composed of a pair of long sides and a pair of wide sides, and the long sides of two adjacent enclosing structures are overlapped.

Optionally, the first oscillator and the second oscillator further include:

the connecting part is communicated with the vibrator main body and the feeder line; and the vibrator tail end is formed by folding the vibrator main body at the tail end away from the connecting part.

Optionally, the oscillator main bodies of the first oscillator and the second oscillator are symmetrically distributed; the tail end of the vibrator of the first vibrator is arc-shaped; the tail end of the vibrator of the second vibrator is square.

Optionally, the enclosing structure of the first oscillator adjacent to the tail end is provided with an opening facing the inner side of the substrate.

Optionally, the antenna further comprises: a second radiation section provided on the substrate surface;

the second radiation portion includes: a third vibrator and a fourth vibrator which are opposite in direction;

the third and fourth oscillators include: the vibration generator comprises a vibration body and a pair of vibration arms, wherein the two tail ends of the vibration body are provided with bending parts, and the pair of vibration arms are formed by extending a preset length from the bending parts; the tail end of the vibrating arm is provided with an expansion part extending in the width direction, and the expanding part and the vibrating arm form a flag-shaped structure.

Optionally, the antenna further comprises: a third radiation portion provided on the substrate surface; the third radiation portion includes: a fifth vibrator and a sixth vibrator which are opposite in direction; the fifth and sixth oscillators include: the vibration generator comprises a vibration body and a pair of vibration arms, wherein the two tail ends of the vibration body are provided with bending parts, and the pair of vibration arms are formed by extending a preset length from the bending parts.

Optionally, the oscillator body of the third oscillator is a part of the oscillator body of the fifth oscillator; the oscillator body of the fourth oscillator is a part of the oscillator body of the sixth oscillator.

Optionally, the total length of the first element is between 1/8 and 3/4 of the low frequency resonance wavelength; the total length of the vibrator body and the vibrating arm of the third vibrator is between 1/8 and 3/4 of the medium-frequency resonance wavelength; the total length of the vibrator body and the vibrating arm of the fifth vibrator is between 1/8 and 3/4 of the high-frequency resonance wavelength.

Optionally, the first oscillator, the third oscillator, and the fifth oscillator are front oscillators facing in a direction opposite to an extension direction of the feed line, and the second oscillator, the fourth oscillator, and the sixth oscillator are rear oscillators facing in a direction same as the extension direction of the feed line;

the front vibrator is connected with the inner conductor of the coaxial line, and the rear vibrator is connected with the outer conductor of the coaxial line.

Optionally, a frequency band corresponding to the first radiation portion is 900MHz, a frequency band corresponding to the second radiation portion is 2.4GHz, and a frequency band corresponding to the third radiation portion is 5.8 GHz.

In order to solve the above technical problem, an embodiment of the present invention further provides the following technical solution: an antenna debugging method. The antenna tuning method is applied to the antenna as described above. The method comprises the following steps:

the total length of the first oscillator and/or the second oscillator is changed by adjusting the number of the enclosing structures with the openings in the plurality of enclosing structures forming the oscillator main body.

In order to solve the above technical problem, an embodiment of the present invention further provides the following technical solution: an external antenna structure. This external antenna structure includes:

an antenna as described above; an antenna housing wrapped outside the antenna; the pin shaft is arranged at one end of the antenna shell; and a connector serving as a fixing seat for the pin, the antenna housing being rotatable around the pin with respect to the connector.

In order to solve the above technical problem, an embodiment of the present invention further provides the following technical solution: an unmanned aerial vehicle. This unmanned aerial vehicle includes: the aircraft comprises an aircraft body, wherein a plurality of propellers are arranged on the aircraft body; the motor is arranged on the unmanned aerial vehicle body and used for driving the propeller to rotate and providing flight power for the unmanned aerial vehicle; the antenna is mounted on the body.

The utility model discloses the antenna adopts reasonable wiring and structural design, can satisfy the user demand of multifrequency section antenna on the less base plate of volume. Moreover, through a unique wiring mode, the process of antenna debugging is simpler and quicker, and the time of antenna debugging is effectively saved.

[ description of the drawings ]

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a third oscillator and a fifth oscillator provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second oscillator according to an embodiment of the present invention;

fig. 4 is a schematic diagram of S parameters of an antenna provided in an embodiment of the present invention;

fig. 5 is a directional diagram of an antenna provided in an embodiment of the present invention at a low frequency band;

fig. 6 is a directional diagram of an antenna in a middle frequency band according to an embodiment of the present invention;

fig. 7 is a directional diagram of an antenna at a high frequency band according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an external antenna structure according to an embodiment of the present invention.

[ detailed description ] embodiments

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "upper", "lower", "inner", "outer", "bottom", and the like as used herein are used in the description to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention. As shown in fig. 1, the antenna mainly includes a substrate 10 as a structural base or body of the antenna, a radiating portion (21,22,23) arranged on a surface of the substrate and composed of a plurality of elements having a specific structural shape, and a feed line 30 connected to the elements to form a feed point and a ground point.

The substrate may be made of any type of material (e.g., plastic, foam), and has a non-conductive structure with a specific shape (e.g., a long rectangle). Which has a relatively flat shape forming a flat substrate surface.

The "radiating portion" refers to a resonance unit for receiving or transmitting a radio signal of a specific frequency band, and is the core of the entire antenna system. Which may generally consist of one or more identical or different elements having a particular shape or configuration, corresponding to a radio signal of a particular frequency band.

The vibrator constituting the radiating portion may be a conductor having a specific length and fixed to the surface of the substrate 10 in any suitable form (e.g., a copper foil arranged on the surface of a PCB in a patch type or the like). The wireless communication device realizes the receiving or transmitting of wireless signals through the electromagnetic induction principle. In this embodiment, the antenna may be provided with three radiation portions, namely, a first radiation portion 21, a second radiation portion 22 and a third radiation portion 23, which correspond to wireless signals of different frequency bands respectively.

The first radiation portion 21 may correspond to a low-band signal, the second radiation portion 22 corresponds to a middle-band signal, and the third radiation portion 23 may correspond to a high-band signal (e.g., 5G full-band). Of course, the "low band", "middle band" and "high band" are only used to indicate relative band height, and are not used to limit a specific band, which may be determined according to the use requirement of the actual situation.

In some embodiments, as shown in fig. 1, the first radiating portion 21 includes a first element 211 and a second element 212.

The first vibrator 211 and the second vibrator 212 are arranged symmetrically along the substrate in opposite directions. In the present embodiment, they may be referred to as "front vibrator" and "rear vibrator", respectively. Specifically, as shown in fig. 1, the first element 211 is located at a position closer to the antenna root (i.e., the extending direction of the feed line) than the second element 212 is. Thus, the first vibrator 211 may be referred to as a "rear vibrator", and the second vibrator 212 may be referred to as a "front vibrator".

The main body portions of the first and second vibrators 211 and 212 have substantially the same structural shape. As shown in fig. 1, it can be considered to be composed of n enclosing structures. The "enclosing structure" refers to a structure enclosed by a complete edge a1 (diagonal filling part). The shape or size of the material can be any type according to the needs of the actual situation, such as a rectangle with a specific length-width ratio.

On one hand, a part of two adjacent enclosing structures are overlapped to form a vibrator main body communicated from the first enclosing structure to the last enclosing structure. That is, a portion of the edges between adjacent containment structures overlap, or are common.

On the other hand, an opening a2 is provided or opened in a part of the enclosure structure constituting the vibrator body. The "opening" refers to a notch or broken discontinuity at the edge of the enclosure.

Based on the arrangement of the openings, the oscillator main body can be bent at different angles for a plurality of times in a limited area space, and the oscillator main body is fully distributed to fully utilize the space on the surface of the substrate to form a bent snake-shaped structure or a similar shape with a plurality of times of bending as shown in fig. 1.

The embodiment of the utility model provides a crooked snakelike structure can arrange the longer oscillator of length in limited space, is favorable to reducing energy transmission's loss. In addition, the design of the enclosing structure can also be used for conveniently changing or adjusting the effective size length of the oscillator by adjusting the number of the openings, thereby being beneficial to improving the debugging efficiency of the antenna and shortening the debugging time.

In some embodiments, as shown in fig. 1, the first vibrator 211 and the second vibrator 212 may have a similar or close structure therebetween, and are symmetrically distributed along the transverse axis of the substrate 10. Preferably, the specific structural shape between the first element 211 and the second element 212 may be slightly adjusted to correct the signal coverage or improve the antenna performance, for example, as shown in fig. 1, the tail end of the first element 211 may adopt a circular arc-shaped end, and the tail end of the second element 212 adopts a square end, so that the mutual cooperation between the two elements plays a role in correcting the signal coverage.

Wherein, the arc-shaped refers to that the edge of the tail end of the oscillator is composed of an arc with a certain radian. And "square" means a structure having a convex angle or the like as opposed to a rounded circular arc. For example, the edges of the ends of the transducer may be formed by mutually perpendicular straight lines.

With reference to fig. 1, the second radiation portion 22 may include: and a pair of third and fourth transducers 221 and 222 facing opposite directions.

The third vibrator 221 and the fourth vibrator 222 are generally configured like a half-aperture shape, and are also symmetrically distributed along the transverse axis of the substrate 10 (i.e., the width direction of the substrate 10).

For convenience of description, the third element 221 is taken as an example, and a specific shape structure of the element used in the second radiation portion 22 will be described in detail below. Of course, the fourth oscillator 222 may have a configuration substantially the same as or similar to that of the third oscillator 221, or may be adjusted accordingly with reference to the third oscillator 221.

As shown in fig. 2, the third element 221 includes: a resonator body 221a, a horn 221b, and an extension 221 c. The vibrator 221a may be a structure extending a certain length in the lateral axis direction of the base. Both ends of which are bent portions having a certain bending angle (e.g., an angle of 90 ° or more).

The vibrating arm 221b is formed by a bent portion extending a predetermined length along a straight line or in another form (e.g., serpentine), thereby forming a half-open shape. The predetermined length is determined according to the signal requirement of the radiating part or the antenna, and can be set by a technician according to the actual situation.

The expanded portion 221c is located at the distal end of the vibrating arm 221b, and is an expanded portion that extends to some extent in the width direction (i.e., the lateral axis direction of the base). It can be embodied in any shape or size (e.g. trapezoidal shape as shown in fig. 1) as required by the skilled person, and the vibrating arm 221b is transited to the expanding portion 221 c.

The expanded portion 221c has a larger width to occupy a larger area than the vibrating arm 221 b. Thus, the extension 221c and the vibrating arm 221b may form a flag-like structure, with the vibrating arm 221b acting as a "flag pole" and the extension 221c acting as a "flag" that is spread over the flag pole.

In other embodiments, the third radiation portion 23 may include: and a pair of oppositely oriented fifth and sixth transducers 231 and 232.

The fifth transducer 231 and the sixth transducer 232 may have a half-open transducer shape. The two can be symmetrically distributed along the transverse axis of the substrate 10, and the openings of the vibrators face to opposite directions.

As shown in fig. 2, the fifth transducer 231 includes a transducer 231a having two ends provided with a bent portion and a pair of transducer arms 231b formed by extending a predetermined length from the bent portion, similar to the second radiating portion. However, the end of the vibrating arm 231b is not provided with an additional extension but maintains a similar width of the vibrating arm, thereby forming a half-open vibrator shape similar to a "U-shape".

Specifically, the third vibrator 221 and the fifth vibrator 231 may share a part of the vibrator. The fourth oscillator 222 and the sixth oscillator 232 which are designed symmetrically also share a part of the oscillator. For simplicity, the third oscillator 221 and the fifth oscillator 231 are taken as examples for description:

as shown in fig. 2, the resonator body 231a of the fifth resonator 231 may extend upward at a position spaced apart from the bent portion to form a resonating arm 221b of the third resonator 221 and an extension 221c at the end of the resonating arm 221 b. And a bent portion at the end of the vibrator 231a extends upward to form a vibrating arm 231 b. In other words, the oscillator 231a may extend upward to form two pairs of oscillator arms (221b, 231b) at different positions, respectively forming the third oscillator 221 and the fifth oscillator 231.

Thus, the oscillator 221a of the third oscillator 221 is actually a part of the oscillator of the fifth oscillator 231 (i.e., both of them are partially overlapped). Similarly, the oscillator body of the fourth oscillator 222 is also a part of the oscillator body of the fifth oscillator.

The feeder line 30 is a signal transmission path connecting the "radiating section" and other signal processing systems. Which generally have good shielding and signal transmission properties to avoid that the radio signals received or transmitted by the "radiating part" are adversely interfered during transmission. It may in particular use any suitable type of wire, such as a coaxial wire.

Specifically, when a coaxial line is used as the feeder line, the first oscillator 211, the third oscillator 221, and the fifth oscillator 231 are used as the rear oscillators and can be electrically connected to the outer conductor of the coaxial line. The second vibrator 212, the fourth vibrator 222 and the sixth vibrator 232 are used as front vibrators and are electrically connected with the inner conductor of the coaxial line to form a corresponding feed point and a grounding point.

In other embodiments, based on the difference of the signal frequency bands corresponding to different radiating parts, the size length of the element also needs to be controlled to ensure that the use requirement of the antenna is met.

Specifically, the total length (i.e., the effective size length) of the first element 211 using the serpentine line needs to be controlled between 1/8 and 3/4 of the low frequency resonance wavelength. The total length of the third element 231 (the total length or effective dimension length of the element and the arm) in the form of a flag element needs to be controlled between 1/8 and 3/4 of the mid-frequency resonance wavelength. And the total length (total length or effective dimension length of the vibrator body and the vibrator arm) of the fifth vibrator 231 in the shape of the 'U' -shaped vibrator needs to be controlled between 1/8 and 3/4 of the high frequency resonance wavelength.

It should be noted that the antenna shown in fig. 1 is only used for exemplary illustration, and one skilled in the art may add, adjust, replace or omit one or more functional components according to the needs of the actual situation, and is not limited to the one shown in fig. 1. The technical features involved in the embodiment of the antenna shown in fig. 1 may be combined with each other as long as they do not conflict with each other and may be applied independently in different embodiments as long as they do not rely on each other.

Fig. 3 is a schematic structural diagram of a second oscillator 212 (rear oscillator) according to an embodiment of the present invention. As shown in fig. 3, the enclosure structure used for the second transducer may be a rectangle having a predetermined length and width.

The rectangular edge or the edge is a conductor with a certain width, and the inner part surrounded by the rectangular surrounding structure is not conductive. Such an enclosure may in particular be realized in any suitable way. This can be achieved, for example, by laying out copper foil traces on the edges of the rectangle shown in fig. 3 on a non-conductive substrate.

The two adjacent rectangles share one long edge (namely, the long edges are overlapped) between the enclosing structures, so that the whole oscillator main body is in a communicated state. In the present embodiment, for the sake of convenience, the sides of the rectangular enclosure structure where the length of the rectangle is located are referred to as "long sides", and the sides of the rectangular enclosure structure where the width of the rectangle is located are referred to as "wide sides".

The openings of the rectangular enclosing structures are arranged on the edges where the rectangular width is located, and the openings of the adjacent rectangular enclosing structures can be arranged in a staggered mode. For example, the opening of the n-th rectangular enclosure structure is opened on the wide side near the inner side of the substrate, and the opening of the (n + 1) -th rectangular enclosure structure is opened on the wide side near the outer side of the substrate. The staggered arrangement mode can form a serpentine structure with multiple bending.

In the actual implementation process, a serpentine line or a similar routing mode can be adopted, and microstrip lines corresponding to the sides of the rectangular enclosing structure are arranged on the surface of the substrate to form the oscillator main body.

Referring to fig. 3, in some embodiments, the second vibrator 212 may further include, in addition to the vibrator body 212 a: a connection portion 212b and a vibrator tail end 212 c.

The connection portion 212b is connected to the head of the vibrator body 212b and is used for connecting the vibrator body 211a and the feeder line 30 to form a corresponding feeder point. It may in particular take any form of connecting wire or other electrically conductive structure.

The vibrator tail end 212c is a tail portion formed by folding the vibrator body at a distal end away from the connection portion. The vibrator tail end 212c may have a corresponding shape, structure or size according to different practical requirements. For example, as shown in fig. 1, one of the oscillators has a circular tail end, and the other oscillator has a square tail end.

Preferably, the second element 212 may be additionally provided with a different structure to improve the performance of the antenna. In the course of carrying out the present application, it was surprisingly found that the signal coverage of the first radiating portion can be improved and modified by providing a specific opening in the portion of the first vibrator 212 near the tail end of the vibrator.

As shown in fig. 3, the specific opening 212d is specifically an opening provided in the enclosure structure adjacent to the tail end of the transducer, and is opened toward the inside of the substrate.

The provision of the opening 211d can increase the signal by about 3 to 4dB, and has better antenna performance, compared with an antenna without the provision of the specific opening 211 d.

The embodiment of the utility model provides a can work at the external three frequency antenna's of 900MHz, 2.4GHz and the three frequency channel of 5.8GHz concrete example.

As shown in fig. 1, the external triple-band antenna includes: the resonator comprises a substrate 10, a first oscillator 211, a second oscillator 212, a third oscillator 221, a fourth oscillator 222, a fifth oscillator 231, a sixth oscillator 232, a feeder line (coaxial line) 30 and a feed coupling line 40.

The first vibrator 211 and the second vibrator 212 are both in a serpentine vibrator shape, the tail end of the first vibrator is square, and the tail end of the second vibrator is arc-shaped. Further, the total length of the first vibrator 211 is 1/8 to 3/4 of a low frequency (900MHz) resonance wavelength.

The first oscillator 211 is a rear oscillator and the second oscillator 212 is a front oscillator, which constitute the first radiating section 21. The front vibrator is connected to the inner conductor of the coaxial line and the rear vibrator is connected to the outer conductor of the coaxial line, thereby communicating with the feeder line 30 to form a feed point. In addition, a specific opening 212d is provided in a portion of the second vibrator 212 near the tail end of the vibrator.

The third element 221 and the fourth element 222 are a pair of symmetrically arranged elements in the shape of flag elements. The third oscillator 221 is a rear oscillator, and the fourth oscillator 222 is a front oscillator, which constitute a second radiating section. The front vibrator is connected to the inner conductor of the coaxial line and the rear vibrator is connected to the outer conductor of the coaxial line, thereby communicating with the feeder line 30 to form a feed point. Further, the size length of the third element 221 is controlled to 1/8 to 3/4 at the intermediate frequency (2.4GHz) resonance wavelength.

The fifth transducer 231 and the sixth transducer 232 are both in the shape of a "U" shaped transducer, and form the third radiating portion 23. The oscillator of the fifth oscillator 231 includes the oscillator of the third oscillator 221. The oscillator of the sixth oscillator 232 includes the oscillator of the fourth oscillator 222.

The dimension length of the fifth element 231 needs to be controlled to 1/8 to 3/4 at the high frequency (5.8GHz) resonance wavelength. The fifth transducer 231 is a rear transducer, and the sixth transducer 232 is a front transducer. The front vibrator is connected with the inner conductor of the coaxial line, and the rear vibrator is connected with the outer conductor of the coaxial line to form a feed point.

As will be understood by those skilled in the art, the total length of the element (which may also be referred to as an effective size length, a dimension length, or an effective length) and the shape of the element are important size parameters in the antenna, and are closely related to the frequency band of wireless signal reception or transmission, which is a very important adjustment means in the process of debugging the antenna.

Based on the one or more antennas that above embodiment provided, the embodiment of the utility model provides an antenna debugging method is still further provided. The antenna debugging method can comprise the following steps:

firstly, the number of the enclosing structures with openings in a plurality of enclosing structures forming the vibrator main body is adjusted. As shown in fig. 3, after the wide side of the rectangular enclosure structure is broken (i.e., set as an opening), the effective length of the first oscillator or the second oscillator can be increased. Therefore, the effective length of the first vibrator or the second vibrator can be conveniently changed by adjusting the number of the openings.

Then, whether the first oscillator and/or the second oscillator meet debugging requirements is determined. If yes, finishing debugging, and if not, readjusting the number of the set openings.

The embodiment of the utility model provides an antenna debugging method, based on first oscillator or the special wiring form of second oscillator, the effective length of adjustment oscillator that can be convenient realizes the purpose of open wire debugging, has the debugging cycle weak point, and debugging convenient operation etc.'s advantage.

Fig. 4 is a schematic diagram of S parameters of an antenna according to an embodiment of the present invention. As shown in fig. 4, the antenna provided by the above embodiment can operate at 870 MHz-950 MHz (low band), 2.36 GHz-2.54 GHz (medium band), and 4 GHz-6 GHz (high band). Therefore, the coverage of three frequency bands of 900MHz, 2.4GHz and 5.8GHz can be realized.

Fig. 5 to fig. 7 are antenna patterns of the antenna at a low frequency band, a middle frequency band and a high frequency band provided by the embodiment of the present invention, respectively. As shown in fig. 5 to 7, the embodiment of the present invention provides an antenna having good directivity in three frequency bands of low frequency band, middle frequency band and high frequency band, good omni-directionality, and no defect in specific direction.

Based on the antenna that above embodiment provided, the embodiment of the utility model provides an external antenna structure is still further provided. The present embodiment does not limit the specific application scenario of the external antenna structure, and the external antenna structure can be used as a transceiver of a wireless signal, and can be applied to any type or kind of electronic devices with a wireless signal transceiving function, such as a remote controller, a smart terminal, a wearable device, or a signal transceiver of a mobile vehicle.

Fig. 8 is a schematic structural diagram of an external antenna structure according to an embodiment of the present invention. As shown in fig. 8, the external antenna structure includes: antenna 100, antenna housing 200, pin 300, and connector 400.

The antenna 100 may specifically be an antenna described in one or more embodiments above, and is determined by a specific implementation or application scenario. For example, antenna 100 may be an omni-directional antenna covering three frequency bands.

The antenna housing 200 is a casing that is wrapped around the antenna 100 to protect the antenna. The antenna housing 200 may be made of any type of non-conductive material (e.g., plastic) and may have a shape that is compatible with the antenna 100, such as the elongated shape shown in fig. 8.

The pin 300 is a rotation shaft disposed at one end of the antenna housing 300, so that the antenna housing 300 has a certain degree of freedom in rotation. Of course, it will be understood by those skilled in the art that any other suitable type of hinge structure or other similar structure (e.g., a swingable elastic member) may alternatively be used to provide the antenna housing 300 with rotational freedom with respect to the connector 400.

The connector 400 is a component for establishing connection between the external antenna structure and other electronic devices, and may be made of any suitable material and may be any type of connection (e.g., threaded connection, snap connection, or adhesive connection). As shown in fig. 8, the connector 400 may be regarded as a fixed seat or a fixed part of the hinge structure formed by the pin 300, and the antenna housing 200 is relatively rotated to swing to a proper angle according to the actual situation. In addition, the feeding line led out from the antenna 100 is also connected to a corresponding electronic device (such as a radio frequency unit or a decoding unit) through the connector 400, so as to implement transceiving of wireless signals.

With the development of drone technology, it is always desirable to be able to reduce the fuselage volume of a drone as much as possible so that the drone can be adapted to perform flight tasks in more scenarios. However, in the case of the reduced size of the unmanned aerial vehicle body, higher requirements are placed on the size and the structure of the antenna, and the antenna is expected to be realized in a limited volume and a structure which is as simple as possible.

Therefore, use the embodiment of the utility model provides an antenna, the demand that satisfies the unmanned aerial vehicle that has less fuselage that can be fine about antenna volume and structure. This unmanned aerial vehicle can include: fuselage, motor and external antenna structure.

Wherein, the fuselage is as unmanned aerial vehicle's major structure, can adopt any suitable material to make and have structure and the size that accords with the use needs. The body can be provided with a plurality of different functional components such as a foot rest, a propeller and the like.

The motor is installed in the fuselage for provide flight power (if rotatory through the drive screw) for unmanned aerial vehicle.

The external antenna structure can be installed on a specific position of the body through a connector of the external antenna structure, and is used as one part of wireless signal transceiving equipment to receive remote control operation instructions from a remote controller or feed back related data information (such as shot images and running state parameters of the unmanned aerial vehicle) to the remote controller or other intelligent terminals.

Of course, based on the application scenario of the drone provided by the above embodiment, those skilled in the art may also apply the antenna provided by the above embodiment to other similar devices (such as a remote controller) with smaller structural volume requirement, and is not limited to the drone.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (13)

1. An antenna, comprising:

a substrate having at least one planar substrate surface;

a first radiation section provided on the substrate surface, the first radiation section including: a first vibrator and a second vibrator facing opposite directions;

the first and second vibrators include: the vibrator body is composed of a plurality of enclosing structures;

at least one part of the adjacent enclosing structures are overlapped to form a communicated vibrator main body; one or more of the enclosing structures forming the vibrator main body are provided with openings so that the vibrator main body forms a bent snake-shaped structure.

2. The antenna of claim 1, wherein the enclosure is a rectangle consisting of a pair of long sides and a pair of wide sides, and the long sides of two adjacent enclosures overlap.

3. The antenna of claim 1, wherein the first element and the second element further comprise:

the connecting part is communicated with the vibrator main body and the feeder line; and

the vibrator main body is folded at the tail end away from the connecting part to form a vibrator tail end.

4. The antenna of claim 3, wherein the element bodies of the first element and the second element are symmetrically distributed;

the tail end of the vibrator of the second vibrator is arc-shaped; the tail end of the vibrator of the first vibrator is square.

5. The antenna according to any of claims 1-4, characterized in that the enclosing structure of the second element adjacent to the element tail is provided with an opening towards the inner side of the substrate.

6. The antenna of claim 1, further comprising: a second radiation section provided on the substrate surface;

the second radiation portion includes: a third vibrator and a fourth vibrator which are opposite in direction;

the third and fourth oscillators include: the vibration generator comprises a vibration body and a pair of vibration arms, wherein the two tail ends of the vibration body are provided with bending parts, and the pair of vibration arms are formed by extending a preset length from the bending parts; the end of the vibrating arm is provided with an expansion part extending in the width direction, and the expanding part and the vibrating arm form a flag-shaped structure.

7. The antenna of claim 6, further comprising: a third radiation portion provided on the substrate surface;

the third radiation portion includes: a fifth vibrator and a sixth vibrator which are opposite in direction;

the fifth and sixth oscillators include: the vibration generator comprises a vibration body and a pair of vibration arms, wherein the two tail ends of the vibration body are provided with bending parts, and the pair of vibration arms are formed by extending a preset length from the bending parts.

8. The antenna according to claim 7, wherein the oscillator of the third element is a part of the oscillator of the fifth element; the oscillator body of the fourth oscillator is a part of the oscillator body of the sixth oscillator.

9. The antenna of claim 7 wherein the total length of the first element is between 1/8 and 3/4 of the low frequency resonant wavelength; the total length of the third vibrator is between 1/8 and 3/4 of the intermediate frequency resonance wavelength; the total length of the fifth element is between 1/8 and 3/4 of the high frequency resonance wavelength.

10. The antenna of claim 7, wherein the first element, the third element and the fifth element are rear elements facing in the same direction as a feed line, the second element, the fourth element and the sixth element are front elements facing in the opposite direction to the feed line, and the feed line is a coaxial line;

the front vibrator is connected with the inner conductor of the coaxial line, and the rear vibrator is connected with the outer conductor of the coaxial line.

11. The antenna according to claim 7, wherein the frequency band corresponding to the first radiation portion is 900MHz, the frequency band corresponding to the second radiation portion is 2.4GHz, and the frequency band corresponding to the third radiation portion is 5.8 GHz.

12. An external antenna structure, comprising:

the antenna of any one of claims 1-11;

an antenna housing wrapped outside the antenna;

the pin shaft is arranged at one end of the antenna shell; and

and the antenna shell can rotate around the pin shaft relative to the connector as the connector of the fixed seat of the pin shaft.

13. An unmanned aerial vehicle, comprising:

the aircraft comprises an aircraft body, wherein a plurality of propellers are arranged on the aircraft body;

the motor is arranged on the unmanned aerial vehicle body and used for driving the propeller to rotate and providing flight power for the unmanned aerial vehicle;

the external antenna structure of claim 12, mounted on the chassis.

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