WO2021078200A1

WO2021078200A1 - Dual-frequency antenna and aerial vehicle

Info

Publication number: WO2021078200A1
Application number: PCT/CN2020/122909
Authority: WO
Inventors: 谭杰洪
Original assignee: 深圳市道通智能航空技术有限公司
Priority date: 2019-10-22
Filing date: 2020-10-22
Publication date: 2021-04-29
Also published as: CN110808460A

Abstract

The present invention relates to a dual-frequency antenna and an aerial vehicle. The dual-frequency antenna comprises: a substrate, a first radiation part, a second radiation part, a first coaxial line, and a second coaxial line, the first radiation part and the second radiation part being arranged on a surface of the substrate; the first coaxial line comprises a first inner wire and a first outer wire insulated and isolated from the first inner wire; the first radiation part comprises a first radiation patch and a second radiation patch which are arranged at an interval; the first radiation patch is electrically connected to the first inner wire; the second radiation patch is electrically connected to the first outer wire; the second coaxial line comprises a second inner wire and a second outer wire insulated and isolated from the second inner wire; the second radiation part comprises a third radiation patch and a fourth radiation patch which are arranged at an interval; the third radiation patch is electrically connected to the second inner wire; the fourth radiation patch is electrically connected to the second outer wire. The aerial vehicle comprises the dual-frequency antenna. The dual-frequency antenna and the aerial vehicle have good omnidirectional performance.

Description

Dual-band antenna and aircraft

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 22, 2019, with the application number of 201911008164.8 and the application name "Dual-band antenna and aircraft", the entire content of which is incorporated into this application by reference.

Technical field

The present invention relates to the field of communication technology, in particular to a dual-frequency antenna and an aircraft.

Background technique

With the rapid development of wireless communication and the requirements of various data services, antenna design is mainly moving towards miniaturization, multi-frequency and broadband development. Miniaturization requires antennas to reduce their size to adapt to the continuous increase in the integration of communication equipment and the increasing volume. The smaller the development trend. However, the existing dual-frequency antenna has a directional direction, which cannot meet the requirements of a 360-degree omnidirectional uniform coverage antenna on the horizontal plane.

Therefore, how to improve an omnidirectional antenna has become a requirement of the prior art.

Summary of the invention

The main purpose of the present invention is to provide a dual-band antenna and aircraft, which aims to make the antenna omnidirectional.

To achieve the above objective, the present invention provides a dual-frequency antenna, the dual-frequency antenna including:

A substrate, a first radiating part, a second radiating part, a first coaxial line and a second coaxial line, the first radiating part and the second radiating part are arranged on the surface of the substrate;

The first coaxial wire includes a first inner wire and a first outer wire insulated from the first inner wire;

The first radiating part includes a first radiating patch and a second radiating patch arranged at intervals, the first radiating patch and the first inner wire are electrically connected, the second radiating patch and the The first outer lead is electrically connected;

The second coaxial wire includes a second inner wire and a second outer wire insulated from the second inner wire;

The second radiating part includes a third radiating patch and a fourth radiating patch that are arranged at intervals, the third radiating patch and the second inner wire are electrically connected, and the fourth radiating patch and the The second outer lead is electrically connected.

Preferably, the first radiation patch is located between the fourth radiation patch and the second radiation patch, and the first radiation patch and the second radiation patch are symmetrical to each other.

Preferably, the first radiation patch includes a first radiation sheet, a second radiation sheet and a first connecting sheet, and the first radiation sheet is electrically connected to the second radiation sheet through the first connecting sheet.

Preferably, the first radiation patch is located between the fourth radiation patch and the second radiation patch, and the first radiation patch and the second radiation patch are both located on the first connecting patch. On a side close to the second radiating part, the first radiating patch is in a "U" shape, and the first connecting piece is electrically connected to the first inner wire.

Preferably, the first radiation part generates a resonant wave of the wavelength of the first radiation frequency band when radiating, and the length of the first radiator is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band The length of the second radiation sheet is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band.

Preferably, the first radiation frequency band is 4.55 GHz to 6.03 GHz.

Preferably, the third radiating patch is provided with a gap, the second radiating part further includes a fifth radiating patch, the fifth radiating patch is arranged in the gap, and the fifth radiating patch And the third radiation patch is arranged at intervals.

Preferably, the third radiation patch surrounds the fifth radiation patch.

Preferably, the third radiation patch includes a first fold line, a second fold line, a third fold line, a fourth fold line, and a fifth fold line connected in sequence, the first fold line and the second fold line are perpendicular, and the first fold line is perpendicular to the second fold line. The second fold line is perpendicular to the third fold line, the third fold line is perpendicular to the fourth fold line, the fourth fold line is perpendicular to the fifth fold line, the first fold line is opposite to the third fold line, so The second fold line is opposite to the fourth fold line, the fifth fold line is located between the first fold line and the third fold line, and the length of the fifth fold line is smaller than that of the first fold line and the first fold line, respectively. The length of the three fold lines, the first fold line, the second fold line, the third fold line, the fourth fold line and the fifth fold line enclose the gap.

Preferably, the fourth radiating patch is located between the first radiating portion and the third radiating patch, and an opening is included between the first and fourth fold lines that are close to the first fold line, so The opening faces the fourth radiation patch.

Preferably, when the second radiation part radiates, a resonant wave of the wavelength of the second radiation frequency band is generated, and the length of the third radiation patch is 1/8 to 3/ of the wavelength of the resonant wave of the wavelength of the second radiation frequency band. 4.

Preferably, the second radiation frequency band is 880MHz-980MHz.

The present invention also provides an aircraft including a fuselage, an arm connected to the fuselage, a power device provided on the arm, a landing gear provided on the fuselage, and the above-mentioned dual-frequency antenna , The dual-frequency antenna is arranged in the landing gear.

Compared with the prior art, the first radiating part and the second radiating part of the present invention are designed to feed separately to reduce the mutual influence between the two frequency bands, so that the dual-frequency antenna has better omnidirectionality, and the dual-frequency antenna satisfies The horizontal plane 360 degrees omnidirectionally and uniformly cover the requirements of the antenna. The first radiating part includes a first radiating patch and a second radiating patch arranged at intervals, the first radiating patch and the first inner conductor are electrically connected, the The second radiating patch is electrically connected to the first outer wire. The spacing between the first radiating patch and the second radiating patch also improves the omnidirectionality of the antenna. The second radiating part includes a third spaced apart The radiating patch and the fourth radiating patch, the third radiating patch and the second inner wire are electrically connected, the fourth radiating patch and the second outer wire are electrically connected, and the third radiating patch The spacing between the patch and the fourth radiating patch also improves the omnidirectionality of the antenna, and the dual-frequency antenna has a simple structure, and the dual-frequency antenna is small in size, low in cost, and convenient to use.

The first radiating patch and the second radiating patch of the present invention are symmetrical to each other, which facilitates the feeding of wires between the first radiating patch and the second radiating patch, effectively guarantees the omnidirectional radiation in the frequency band, and makes the maximum inclination angle in the horizontal direction .

The second radiating part of the present invention further includes a fifth radiating patch, the fifth radiating patch is arranged in the gap, the fifth radiating patch and the third radiating patch are arranged at intervals, and the fifth radiating patch The patch increases the impedance bandwidth of the dual-band antenna, making the antenna performance more stable.

Compared with the prior art, the aircraft of the present invention includes a dual-frequency antenna. The first radiating part and the second radiating part of the dual-frequency antenna are designed to be fed separately, which reduces the mutual influence between the two frequency bands, so that the dual-frequency antenna has better performance. Good omnidirectionality. The dual-band antenna meets the requirements of 360-degree omnidirectional uniform coverage antenna on the horizontal plane. The first radiating part includes a first radiating patch and a second radiating patch arranged at intervals. The first radiating patch and the The first inner wire is electrically connected, the second radiating patch and the first outer wire are electrically connected, and the spacing between the first radiating patch and the second radiating patch also improves the omnidirectionality of the antenna. The second radiating part includes a third radiating patch and a fourth radiating patch arranged at intervals, the third radiating patch and the second inner wire are electrically connected, and the fourth radiating patch and the second radiating patch are electrically connected to each other. The outer conductor is electrically connected, and the spacing between the third radiating patch and the fourth radiating patch also improves the omnidirectionality of the antenna, and the dual-frequency antenna has a simple structure, and the dual-frequency antenna is small in size, low in cost, and convenient to use.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the dual-frequency antenna of the present invention.

Fig. 2 is a schematic diagram of the structure of the first radiating part of the present invention.

FIG. 3 is a schematic diagram of the structure of the second radiation part of the present invention.

FIG. 4 is a schematic diagram of the structure of the third radiation patch of the present invention.

Fig. 5A is an S-curve parameter diagram of the first radiating part of the dual-frequency antenna.

Fig. 5B is an S-curve parameter diagram of the second radiating part of the dual-frequency antenna.

Fig. 6A is a pattern of the first radiation part of the dual-frequency antenna at 5.5 GHz.

Fig. 6B is a 900 MHz directivity diagram of the second radiating part of the dual-frequency antenna.

FIG. 7 is a schematic top view of the structure of an aircraft provided by the second embodiment of the present invention.

The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in a sequence other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

It should be noted that the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. . Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

Referring to FIG. 1, the present invention provides a dual-frequency antenna 10, which can work in two frequency bands of 880MHz-980MHz and 4.55GHz-6.03GHz. The antenna of the present invention has good omnidirectionality. The dual-frequency antenna 10 includes a substrate 11, a first radiating portion 12, a second radiating portion 13, a first coaxial line (not shown in the figure), and a second coaxial line (not shown in the figure). The two radiating parts 13 are arranged on the surface of the substrate 11, the first radiating part 12 and the second radiating part 13 are arranged at intervals, the first coaxial line and the first radiating part 12 are electrically connected, and the first coaxial line gives the first radiation The second coaxial line is electrically connected to the second radiating part 13, and the second coaxial line feeds the second radiating part 13. The first radiating part 12 and the second radiating part 13 are designed to feed separately to reduce the mutual influence between the two frequency bands, so that the dual-frequency antenna 10 has better omnidirectionality.

The substrate 11 is used to carry the first radiating portion 12 and the second radiating portion 13, and the substrate 11 may be a PCB (Printed Circuit Board) board. The substrate 11 is made of insulating material, and the specific material of the substrate 11 is not limited. For example, the material of the substrate 11 is polyethylene terephthalate or silicone resin polymer material. The first radiating part 12 and the second radiating part 13 may be arranged on the same surface of the substrate 11, and the first radiating part 12 and the second radiating part 13 may be arranged on opposite surfaces of the substrate 11. In this embodiment, the The first radiating part 12 and the second radiating part 13 are arranged on the same surface of the substrate 11 for description. The shape of the substrate 11 is rectangular parallelepiped, and the surface of the substrate 11 carrying the first radiating portion 12 and the second radiating portion 13 is rectangular.

The first coaxial line can be a coaxial line commonly used in existing antennas. The first coaxial line is electrically connected with the feeding device or the feeding network to feed the first radiating part 12. The first coaxial wire includes a first inner wire and a first outer wire insulated from the first inner wire.

Please refer to FIG. 2, the first radiating part 12 includes a first radiating patch 121 and a second radiating patch 122 arranged at intervals, the first radiating patch 121 is electrically connected to the first inner wire, and the first radiating patch 121 is electrically connected to the first inner wire. The second radiation patch 122 is electrically connected to the first outer lead. The first radiating patch 121, the second radiating patch 122, and the second radiating portion 13 are arranged along the length direction of the substrate 11, and the first radiating patch 121 is located on the second radiating portion 13 and the second radiating patch 122 between. When the first radiation part 12 radiates, a resonant wave of the wavelength of the first radiation frequency band is generated. The first radiation frequency band is 4.55GHz～6.03GHz.

The first radiation patch 121 includes a first radiation sheet 1211, a second radiation sheet 1212, and a first connecting sheet 1213. The first radiation sheet 1211 is electrically connected through the first connecting sheet 1213 and the second radiation sheet 1212. connection. In this embodiment, the first radiating sheet 1211 and the second radiating sheet 1212 are all located on the side of the first connecting sheet 1213 close to the second radiating portion 13. The first radiating patch 121 is in a "U" shape, and the first connecting piece 1213 is electrically connected to the first inner wire.

The first radiating sheet 1211 can conduct electricity. The shape of the first radiating sheet 1211 is not limited, and the length of the first radiating sheet 1211 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band. In this embodiment, the shape of the first radiating sheet 1211 is rectangular. The shape of the first radiating sheet 1211 may also be a triangle, a trapezoid, or the like.

The second radiating sheet 1212 can conduct electricity. The shape of the second radiating sheet 1212 is not limited, and the length of the second radiating sheet 1212 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band. In this embodiment, the shape of the second radiating sheet 1212 is rectangular. The shape of the second radiating sheet 1212 may also be a triangle, a trapezoid, or the like. Preferably, the length of the second radiating sheet 1212 is equal to the length of the first radiating sheet 1211.

The first connecting piece 1213 can conduct electricity. A feeding point may be provided on the first connecting piece 1213 to electrically connect the first inner wire and the feeding point on the first connecting piece 1213. It can be understood that the first inner wire may not be electrically connected to the first connecting piece 1213, so that the first inner wire is electrically connected to the first radiating piece 1211 or the second radiating piece 1212, which does not interfere with the first radiating patch 121 Normal use.

The second radiating patch 122 includes a third radiating plate 1221, a fourth radiating plate 1222, and a second connecting plate 1223. The third radiating plate 1221 is electrically connected through the second connecting plate 1223 and the fourth radiating plate 1222. connection. In this embodiment, the third radiating sheet 1221 and the fourth radiating sheet 1222 are all located on the side of the second connecting sheet 1223 away from the second radiating portion 13. The second radiating patch 122 is in a "U" shape, and the second connecting piece 1223 is electrically connected to the first outer wire. Preferably, the second radiating patch 122 and the first radiating patch 121 are symmetrical to each other, which facilitates the feeding of wires between the first radiating patch 121 and the second radiating patch 122, and effectively ensures the omnidirectional radiation in the frequency band to maximize The inclination is in the horizontal direction.

The third radiating sheet 1221 can conduct electricity. The shape of the third radiating sheet 1221 is not limited, and the length of the third radiating sheet 1221 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band. In this embodiment, the shape of the third radiating sheet 1221 is rectangular. The shape of the third radiating sheet 1221 may also be triangular or trapezoidal.

The fourth radiating sheet 1222 can conduct electricity. The shape of the fourth radiating sheet 1222 is not limited, and the length of the fourth radiating sheet 1222 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band. In this embodiment, the shape of the fourth radiating sheet 1222 is rectangular. The shape of the fourth radiating sheet 1222 may also be triangular or trapezoidal. Preferably, the length of the fourth radiating sheet 1222 is equal to the length of the third radiating sheet 1221.

The second connecting piece 1223 can conduct electricity. The second connecting piece 1223 may be provided with a feeding point, so that the first outer lead and the feeding point on the second connecting piece 1223 are electrically connected. It is understandable that the first outer wire may not be electrically connected to the second connecting piece 1223, so that the first outer wire is electrically connected to the third radiating piece 1221 or the fourth radiating piece 1222, without hindering the second radiating patch 122 Normal use.

The second coaxial line can be a coaxial line commonly used in existing antennas. The second coaxial line is electrically connected with the feeding device or the feeding network to feed the second radiating part 13. The second coaxial wire includes a second inner wire and a second outer wire insulated from the second inner wire.

Referring to FIG. 3, the second radiating part 13 includes a third radiating patch 131 and a fourth radiating patch 132 that are arranged at intervals, and the second radiating part 13 further includes a fifth radiating patch 133, the third radiating patch 131 It is electrically connected to the second inner wire, and the fourth radiation patch 132 is electrically connected to the second outer wire. The second radiating patch 122, the first radiating patch 121, the fourth radiating patch 132, and the third radiating patch 131 are arranged at intervals along the length direction of the substrate 11, and the fourth radiating patch 132 is located in the first radiating portion 12 between the first radiating patch 121 and the third radiating patch 131, the fifth radiating patch 133 is located in the third radiating patch 131, and the fifth radiating patch 133 and the third radiating patch 131 are spaced apart . When the second radiation part 13 radiates, a resonant wave of the wavelength of the second radiation frequency band is generated. The second radiation frequency band is 880MHz～980MHz. The fifth radiating patch 133 increases the impedance bandwidth of the dual-band antenna 10, making the antenna performance more stable.

The shape of the fourth radiation patch 132 is not limited. In this embodiment, the shape of the fourth radiation patch 132 is rectangular, and the length direction of the fourth radiation patch 132 is perpendicular to the length direction of the substrate 11. Wherein, the first radiation patch 121 is located between the fourth radiation patch 132 and the second radiation patch 122.

Referring to FIG. 4, the third radiating patch 131 is provided with a gap 1311, the fifth radiating patch 133 is disposed in the gap 1311, and the third radiating patch 131 surrounds the fifth radiating patch 133. Specifically, the third radiation patch 131 includes a first fold line 1312, a second fold line 1313, a third fold line 1314, a fourth fold line 1315, and a fifth fold line 1316 connected in sequence, and the first fold line 1312 and the second fold line 1313 are perpendicular , The second fold line 1313 and the third fold line 1314 are perpendicular, the third fold line 1314 and the fourth fold line 1315 are perpendicular, the fourth fold line 1315 and the fifth fold line 1316 are perpendicular, the first fold line 1312 and the third fold line 1314 are arranged opposite, the second fold line 1313 It is opposite to the fourth fold line 1315. The outer contour shape of the third radiation patch 131 is roughly rectangular or square. The fifth fold line 1316 is located between the first fold line 1312, the third fold line 1314, the length of the fifth fold line 1316 is smaller than the length of the first fold line 1312, the third fold line 1314, the first fold line 1312, the second fold line 1313, and the third fold line 1314. The third fold line 1314, the fourth fold line 1315 and the fifth fold line 1316 enclose the gap 1311. An opening 1317 is included between one end of the first fold line 1312 and the fourth fold line 1315 close to the first fold line 1312, and the opening 1317 faces the fourth radiation patch 132. The length of the third radiation patch 131 is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the second radiation frequency band. The length of the third radiation patch 131 is the length from one end of the third radiation patch 131 to the other end of the third radiation patch 131. As in this embodiment, the length of the third radiation patch 131 is the sum of the lengths of the first fold line 1312, the second fold line 1313, the third fold line 1314, the fourth fold line 1315 and the fifth fold line 1316.

The shape of the fifth radiating patch 133 is not limited. In this embodiment, the shape of the fifth radiating patch 133 is a rectangle, and the length square of the fifth radiating patch 133 is parallel to the length square of the substrate 11. The shape of the fifth radiating patch 133 may also be trapezoidal, elliptical, or the like.

Please refer to FIG. 5A and FIG. 5B together. It can be seen from the figures that the first radiation part 12 of the dual-frequency antenna 10 can work at 4.55GHz～6.03GHz with a bandwidth of 1.48GHz (26.0%). The second radiation of the dual-frequency antenna 10 The part 13 can work at 880MHz-980MHz, with a bandwidth of 100MHz (11.0%), which meets the coverage of commonly used 900MHz and 5.5GHz frequency bands.

As shown in FIG. 6A, it can be seen from the figure that the dual-frequency antenna 10 can achieve omnidirectional coverage at 5.5 GHz, and the maximum antenna radiation direction is in the horizontal direction.

As shown in FIG. 6B, it can be seen from the figure that the dual-band antenna 10 can achieve omnidirectional coverage at 900 MHz, and the maximum radiation direction is in the horizontal direction.

Referring to FIG. 7, a second embodiment of the present invention provides an aircraft 20. The aircraft 20 includes a fuselage 21, an arm 22 connected to the fuselage 21, a power device 23 provided on the arm 22, and a fuselage 21. The landing gear 24 and the dual-band antenna 10. Among them, the power device 23 is used to provide flight power for the aircraft 20, and the dual-frequency antenna 10 is arranged in the landing gear 24.

In this embodiment, the bottom view of the aircraft is taken as an example to schematically show the installation position of the dual-frequency antenna 10. In this embodiment, the installation position of the dual-frequency antenna 10 is not limited to the installation position shown in FIG. The installation position of the dual-frequency antenna 10 that can better satisfy signal transmission and reception is also acceptable.

The dual-frequency antenna 10 provided in the landing gear 24 of the aircraft 20 widens the wave width of the dual-frequency antenna 10 on the elevation plane, and the signal remains stable when the antenna is tilted. Thereby, during the flight of the aircraft, the influence of the flight posture of the aircraft on communication is reduced, and the communication of the aircraft 20 during the flight is ensured.

It should be noted that the sequence numbers of the above-mentioned embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. And the terms "include", "include" or any other variants thereof in this article are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements not only includes those elements, but also includes those elements that are not explicitly included. The other elements listed may also include elements inherent to the process, device, article, or method. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, device, article, or method that includes the element.

The above are only preferred embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technical fields , The same reason is included in the patent protection scope of the present invention.

Claims

A dual-frequency antenna, characterized in that the dual-frequency antenna comprises: a substrate, a first radiating part, a second radiating part, a first coaxial line and a second coaxial line,

The first radiating part and the second radiating part are arranged on the surface of the substrate;

The first coaxial wire includes a first inner wire and a first outer wire insulated from the first inner wire;

The first radiating part includes a first radiating patch and a second radiating patch arranged at intervals, the first radiating patch and the first inner wire are electrically connected, the second radiating patch and the The first outer lead is electrically connected;

The second coaxial wire includes a second inner wire and a second outer wire insulated from the second inner wire;

The second radiating part includes a third radiating patch and a fourth radiating patch that are arranged at intervals, the third radiating patch and the second inner wire are electrically connected, and the fourth radiating patch and the The second outer lead is electrically connected.
The dual-band antenna according to claim 1, wherein the first radiating patch is located between the fourth radiating patch and the second radiating patch, and the first radiating patch and the second radiating patch are The two radiation patches are symmetrical to each other.
The dual-band antenna according to claim 1, wherein the first radiating patch includes a first radiating piece, a second radiating piece, and a first connecting piece, and the first radiating piece passes through the first connecting piece. The sheet is electrically connected to the second radiating sheet.
5. The dual-band antenna of claim 3, wherein the first radiating patch is located between the fourth radiating patch and the second radiating patch, and the first radiating patch, the The second radiating pieces are all located on the side of the first connecting piece close to the second radiating part, the first radiating patch is in a "U" shape, and the first connecting piece is electrically connected to the first inner wire .
The dual-band antenna according to claim 3, wherein the first radiating part generates a resonant wave of the wavelength of the first radiation frequency band when radiating, and the length of the first radiating plate is equal to that of the wavelength of the first radiation frequency band. The wavelength of the resonant wave is 1/8 to 3/4, and the length of the second radiation plate is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band.
The dual-band antenna according to claim 5, wherein the first radiation frequency band is 4.55 GHz to 6.03 GHz.
The dual-band antenna according to claim 1, wherein the third radiating patch is provided with a slot, the second radiating part further includes a fifth radiating patch, and the fifth radiating patch is arranged on In the gap, the fifth radiation patch and the third radiation patch are arranged at intervals.
8. The dual-band antenna according to claim 7, wherein the third radiating patch surrounds the fifth radiating patch.
The dual-band antenna according to claim 7, wherein the third radiating patch comprises a first fold line, a second fold line, a third fold line, a fourth fold line, and a fifth fold line connected in sequence, and the first fold line The fold line is perpendicular to the second fold line, the second fold line is perpendicular to the third fold line, the third fold line is perpendicular to the fourth fold line, the fourth fold line is perpendicular to the fifth fold line, and the The first fold line is opposite to the third fold line, the second fold line is opposite to the fourth fold line, and the fifth fold line is located between the first fold line and the third fold line. The lengths are respectively smaller than the lengths of the first fold line and the third fold line, and the first fold line, the second fold line, the third fold line, the fourth fold line, and the fifth fold line enclose the Gap.
The dual-band antenna according to claim 9, wherein the fourth radiating patch is located between the first radiating part and the third radiating patch, and the first fold line and the fourth fold line are close to An opening is included between one end of the first fold line, and the opening faces the fourth radiation patch.
7. The dual-band antenna according to claim 7, wherein the second radiation part generates a resonant wave with a wavelength in the second radiation frequency band when radiated, and the length of the third radiation patch is a wavelength in the second radiation frequency band. 1/8 to 3/4 of the wavelength of the resonance wave.
8. The dual-band antenna according to claim 7, wherein the second radiation frequency band is 880MHz-980MHz.
An aircraft, characterized in that the aircraft includes a fuselage, an arm connected to the fuselage, a power device provided on the arm, a landing gear provided on the fuselage, and claim 1- The dual-frequency antenna according to any one of 12, the dual-frequency antenna is arranged in the landing gear.