WO2021078260A1

WO2021078260A1 - Dual-band antenna and aerial vehicle

Info

Publication number: WO2021078260A1
Application number: PCT/CN2020/123307
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: 2019-10-25
Filing date: 2020-10-23
Publication date: 2021-04-29
Also published as: CN110931965A; CN110931965B

Abstract

The present invention relates to the technical field of communications, and specifically relates to a dual-band antenna and an aerial vehicle. The dual-band antenna comprises a substrate, a first radiation part, a second radiation part and a coaxial line. The first radiation part and the second radiation part are disposed on the surface of the substrate; the coaxial line comprises an inner lead and an outer lead insulated and isolated from the inner lead; the first radiation part and the inner lead are electrically connected; the second radiation part and the outer lead are electrically connected; and the second radiation part and the first radiation part are arranged spaced apart from each other. The aerial vehicle comprises the described dual-band antenna. The dual-band antenna and the aerial vehicle have good omnidirectionality.

Description

Dual-band antenna and aircraft

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with the application number 201911025812.0 and the application name "Dual-band antenna and aircraft" on October 25, 2019, 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.

Utility model content

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

In order to achieve the above objective, the present invention provides a dual-frequency antenna, which includes a substrate, a first radiating part, a second radiating part, and a coaxial line; the first radiating part and the second radiating part Is arranged on the surface of the substrate; the coaxial line includes an inner wire and an outer wire insulated and isolated from the inner wire; the first radiating portion and the inner wire are electrically connected; the second radiating portion and The outer wire is electrically connected, and the second radiating part and the first radiating part are spaced apart.

Preferably, the shapes of the first radiating part and the second radiating part are both axially symmetrical figures.

Preferably, the first radiating part includes a feeding impedance part and a first radiation patch, the feeding impedance part and the first radiating patch are electrically connected, and the feeding impedance part and the inner wire Electrical connection.

Preferably, the first radiation patch includes a first vibrator arm and a second vibrator arm that are arranged in parallel, and both the first vibrator arm and the second vibrator arm are electrically connected to the feed impedance part.

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 vibrator arm 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 vibrator arm is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band.

Preferably, the second radiating part includes a groove, and at least a part of the first radiating part is located in the groove.

Preferably, the second radiating portion includes a connecting arm and a second radiating patch, and a side of the connecting arm away from the first radiating portion is electrically connected to the second radiating patch.

Preferably, the second radiation patch includes a third vibrator arm and a fourth vibrator arm, the third vibrator arm and the fourth vibrator arm are electrically connected to the connecting arm, and the third vibrator arm is electrically connected to the connecting arm. The vibrator arm and the fourth vibrator arm are spaced apart.

Preferably, when the second radiation part radiates, a resonant wave with a wavelength in the second radiation band is generated, and the length of the third vibrator arm is 1/8 to 3/ of the wavelength of the resonant wave with a wavelength in the second radiation band. 4. The length of the fourth vibrator arm is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the second radiation frequency band.

Preferably, the second radiating portion further includes a third radiating patch, and the side of the connected arm close to the first radiating portion is electrically connected to the third radiating patch.

Preferably, the third radiation patch includes a fifth vibrator arm and a sixth vibrator arm, the fifth vibrator arm and the sixth vibrator arm are all electrically connected to the connecting arm, and the fifth vibrator arm , The sixth vibrator arm and the connecting arm enclose a groove.

In a second aspect, the present invention also provides an aircraft that includes a fuselage, an arm connected to the fuselage, a power device provided on the arm, a landing gear provided on the fuselage, and In the dual-frequency antenna according to the embodiment of the first aspect of the present application, the dual-frequency antenna is provided in the landing gear.

Compared with the prior art, the second radiating part and the first radiating part of the dual-frequency antenna of the present invention are arranged at intervals, the dual-frequency antenna has better omnidirectionality, and the dual-frequency antenna satisfies a 360-degree omnidirectional uniformity in the horizontal plane. To cover antenna requirements, the first radiating part is electrically connected to the inner wire; the second radiating part is electrically connected to the outer wire, which also improves the omnidirectionality of the antenna, and realizes that the dual-frequency antenna can meet the requirements within a limited length The standing wave is wide, 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 shapes of the first radiating part and the second radiating part of the present invention are both axisymmetric patterns, which ensures the omnidirectionality of the dual-frequency antenna radiation.

Compared with the prior art, the aircraft of the present invention includes a fuselage, an arm connected to the fuselage, a power device provided on the arm, a landing gear provided on the fuselage, and the first In the dual-frequency antenna according to the embodiment, the dual-frequency antenna is arranged in the landing gear, the second radiating part and the first radiating part of the dual-frequency antenna are arranged at intervals, and the dual-frequency antenna has better omnidirectionality The dual-frequency antenna meets the requirements of 360-degree omnidirectional uniform coverage of the horizontal plane. The first radiating part is electrically connected to the inner wire; the second radiating part is electrically connected to the outer wire, which also improves the overall antenna Directivity, to achieve the required standing wave bandwidth within the limited length of the dual-frequency 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.

Figure 4 is the S curve parameter diagram of the dual-frequency antenna.

Fig. 5A is a directional diagram of the first radiating part of the dual-frequency antenna at 2.45 GHz.

Fig. 5B is a 5.5 MHz pattern of the second radiating part of the dual-frequency antenna.

FIG. 6 is a schematic top view of the structure of an aircraft provided by the second embodiment of the present invention.

Detailed ways

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

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.

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 scope of protection required by the utility model.

Please refer to Figure 1. The present invention provides a dual-frequency antenna 10, which can work in two frequency bands 2.35GHz～2.8GHz and 4.8GHz～6.0GHz, with bandwidths of 350MHz (13.0%) and 1.48GHz respectively. 26.0%), the dual-frequency antenna 10 satisfies the coverage of the commonly used 2.45 Hz and 5.5 GHz frequency bands, and 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 and a coaxial line (not shown); the first radiating portion 12 and the second radiating portion 13 are arranged on the surface of the substrate 11, and the first radiating portion The first radiating section 12 and the second radiating section 13 are fed by a coaxial line at the same time. The first radiating section 1212 and the second radiating section 1313 are designed separately to reduce the gap between the two frequency bands. The mutual influence of the dual-frequency antenna 1010 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. The first radiating part 12 and the second radiating part 13 may also be arranged on opposite surfaces of the substrate 11. In this embodiment, The first radiation part 12 and the second radiation part 13 are provided 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 coaxial line can be a coaxial line commonly used in existing antennas. The coaxial line is electrically connected with a feeding device or a feeding network to feed the first radiating part 12 and the second radiating part 13. The coaxial line includes an inner wire and an outer wire insulated from the inner wire. Wherein, the inner wire is electrically connected to the first radiating portion 12, and the outer wire is electrically connected to the second radiating portion 13.

Referring to FIG. 2, the first radiating portion 12 includes a feeding impedance portion 121 and a first radiating patch 122, the feeding impedance portion 121 and the first radiating patch 122 are electrically connected, and the feeding impedance portion 121 is also connected to the inner The wires are electrically connected. The inner wire feeds the first radiation patch 122 through the feeding impedance part 121. Preferably, the shape of the first radiating portion 12 is an axisymmetric pattern, which ensures the omnidirectionality of the radiation of the dual-frequency antenna 10. 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 2.35GHz～2.8GHz.

The feed impedance part 121 can conduct electricity. The shape of the feeding impedance portion 121 is not limited, and the inner wire can feed power to the first radiation patch 122 through the feeding impedance portion 121. In this embodiment, the feeding impedance portion 121 is in a "U" shape. The feed impedance part 121 can also adjust the impedance bandwidth of the dual-frequency antenna 10, so that the performance of the dual-frequency antenna 10 is more stable. Controlling the width of the feeding impedance part 121 can adjust the characteristic impedance of the input end of the first radiating part 12, and can appropriately control the impedance of the dual-frequency antenna 10 to achieve broadband radiation of the dual-frequency antenna 10.

The shape of the first radiation patch 122 is not limited, and the shape of the first radiation patch 122 may be rectangular, trapezoidal, elliptical, or the like. The length of the first radiation patch 122 is 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 first radiating patch 122 includes a first dipole arm 1221 and a second dipole arm 1222 arranged in parallel, and the first dipole arm 1221 and the second dipole arm 1222 are all electrically connected to the feed impedance part 121. The first vibrator arm 1221 and the second vibrator arm 1222 are spaced apart.

The first vibrator arm 1221 can conduct electricity. The shape of the first dipole arm 1221 is not limited, and the length of the first dipole arm 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 first vibrator arm 1221 is rectangular. The shape of the first vibrator arm 1221 may also be a triangle, a trapezoid, or the like.

The second vibrator arm 1222 can conduct electricity. The shape of the second vibrator arm 1222 is not limited, and the length of the second vibrator arm 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 second vibrator arm 1222 is rectangular. The shape of the second vibrator arm 1222 may also be triangular, trapezoidal, or the like. Preferably, the length of the first vibrator arm 1221 and the length of the second vibrator arm 1222 are equal.

Please refer to FIG. 1 and FIG. 3 together, the second radiating portion 13 and the first radiating portion 12 are arranged along the length direction of the substrate 11. The second radiating part 13 includes a groove 131, a part of the first radiating part 12 is located in the groove 131, and at least a part of the feeding impedance part 121 may be located in the groove 131, realizing the dual frequency of the dual-frequency antenna 10 radiation. Specifically, the second radiating portion 13 includes a connecting arm 132, a second radiating patch 133, and a third radiating patch 134. The side of the connecting arm 132 away from the first radiating portion 12 and the second radiating patch 133 are electrically connected. connection. The side of the connecting arm 132 close to the first radiating portion 12 is connected to the third radiating patch 134. The connecting arm 132 is electrically connected to the outer wire, and the outer wire simultaneously feeds the second radiating patch 133 and the third radiating patch 134 through the connecting arm 132. Preferably, the shape of the second radiating portion 13 is an axisymmetric pattern, which ensures the omnidirectionality of the radiation of the dual-frequency antenna 10. 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 4.8GHz～6.0GHz. In this embodiment, the second radiating portion 13 and the first radiating portion 12 are not symmetrical to each other, and the radiation of the dual-frequency antenna 10 is optimized, and the two frequency bands of the dual-frequency antenna 10 can be adjusted.

The connecting arm 132 can conduct electricity, and the shape of the connecting arm 132 is not limited. In this embodiment, the shape of the connecting arm 132 is rectangular.

The second radiation patch 133 includes a third oscillator arm 1331 and a fourth oscillator arm 1332. The third oscillator arm 1331 and the fourth oscillator arm 1332 are electrically connected to the connecting arm 132. The third oscillator arm 1331 and the fourth oscillator arm 1332 are electrically connected to the connecting arm 132. The vibrator arms 1332 are arranged at intervals. Preferably, the shape formed by the third vibrator arm 1331, the fourth vibrator arm 1332 and the connecting arm 132 is a "U" shape.

The third vibrator arm 1331 can conduct electricity. The shape of the third oscillator arm 1331 is not limited, and the length of the third oscillator arm 1331 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the second radiation frequency band. In this embodiment, the shape of the third vibrator arm 1331 is rectangular. The shape of the third vibrator arm 1331 may also be triangular, trapezoidal, or the like.

The fourth vibrator arm 1332 can conduct electricity. The shape of the fourth dipole arm 1332 is not limited, and the length of the fourth dipole arm 1332 may be 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the second radiation frequency band. In this embodiment, the shape of the fourth vibrator arm 1332 is rectangular. The shape of the fourth vibrator arm 1332 may also be triangular, trapezoidal, or the like. Preferably, the length of the fourth vibrator arm 1332 and the length of the third vibrator arm 1331 are equal.

The third radiation patch 134 includes a fifth vibrator arm 1341 and a sixth vibrator arm 1342. The fifth vibrator arm 1341 and the sixth vibrator arm 1342 are all electrically connected to the connecting arm 132. The fifth vibrator arm 1341 and the sixth vibrator arm 1342 The aforementioned groove 131 is enclosed with the connecting arm 132. Preferably, the shape formed by the fifth vibrator arm 1341, the sixth vibrator arm 1342 and the connecting arm 132 is a "U" shape.

The fifth vibrator arm 1341 can conduct electricity. The shape of the fifth vibrator arm 1341 is not limited. In this embodiment, the shape of the fifth vibrator arm 1341 is rectangular. The shape of the fifth vibrator arm 1341 may also be triangular, trapezoidal, or the like. Preferably, the fifth vibrator arm 1341 and the third vibrator arm 1331 are located on the same straight line.

The sixth vibrator arm 1342 can conduct electricity. The shape of the sixth vibrator arm 1342 is not limited. In this embodiment, the shape of the sixth vibrator arm 1342 is rectangular. The shape of the sixth vibrator arm 1342 may also be triangular, trapezoidal, or the like. Preferably, the length of the sixth vibrator arm 1342 and the length of the fifth vibrator arm 1341 are equal. Preferably, the sixth vibrator arm 1342 and the fourth vibrator arm 1332 are located on the same straight line. The shape formed by the connecting arm 132, the second radiation patch 133 and the third radiation patch 134 is an "H" shape, that is, the second radiating portion 13 is an "H" shape.

Please refer to FIG. 4 together. It can be seen from the figure that the first radiating part 12 of the dual-frequency antenna 10 can work at 2.35GHz～2.8GHz with a bandwidth of 350MHz (13.0%), and the second radiating part 13 of the dual-frequency antenna 10 can work From 4.8GHz to 6.0GHz, the bandwidth is 1.48GHz (26.0%), which meets the coverage of the commonly used 2.45Hz and 5.5GHz frequency bands.

As shown in FIG. 5A, it can be seen from the figure that the dual-frequency antenna 1010 can achieve omnidirectional coverage at 2.45 GHz, and the maximum radiation direction of the antenna is in the horizontal direction.

As shown in FIG. 5B, it can be seen that the dual-frequency antenna 1010 can achieve omnidirectional coverage at 5.5 GHz, and the maximum radiation direction is in the horizontal direction.

Referring to FIG. 6, 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 1010. The power device 23 is used to provide flight power for the aircraft 20, and the dual-frequency antenna 1010 is provided 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 serial numbers of the above-mentioned embodiments of the present utility model are only for description, and do not represent the superiority or inferiority 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 one..." does not exclude the existence of other identical elements in the process, device, article, or method that includes the element.

The above are only the preferred embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by the content of the utility model description and drawings, or directly or indirectly applied to other related In the same way, all the technical fields are included in the scope of patent protection of this utility model.

Claims

A dual-frequency antenna, characterized in that: the dual-frequency antenna includes a substrate, a first radiating part, a second radiating part, and a coaxial line; the first radiating part and the second radiating part are arranged on the substrate The coaxial line includes an inner wire and an outer wire insulated and isolated from the inner wire; the first radiating portion and the inner wire are electrically connected; the second radiating portion and the outer wire are electrically connected And the second radiating part and the first radiating part are arranged at intervals.
The dual-frequency antenna according to claim 1, wherein the shapes of the first radiating portion and the second radiating portion are both axisymmetric patterns.
The dual-band antenna according to claim 1, wherein the first radiating part comprises a feeding impedance part and a first radiating patch, and the feeding impedance part and the first radiating patch are electrically connected , The feeding impedance part is electrically connected to the inner wire.
The dual-frequency antenna according to claim 3, wherein the first radiation patch comprises a first dipole arm and a second dipole arm arranged in parallel, and both the first dipole arm and the second dipole arm are It is electrically connected to the feed impedance part.
The dual-band antenna according to claim 4, wherein the first radiating part generates a resonant wave of the wavelength of the first radiation frequency band when radiated, and the length of the first dipole arm 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 vibrator arm is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the first radiation frequency band.
8. The dual-band antenna of claim 1, wherein the second radiating portion includes a groove, and at least a part of the first radiating portion is located in the groove.
The dual-band antenna according to claim 1, wherein the second radiating part comprises a connecting arm and a second radiating patch, and the connecting arm is far away from the first radiating part and the second radiating patch. The radiation patch is electrically connected.
The dual-frequency antenna according to claim 7, wherein the second radiating patch includes a third dipole arm and a fourth dipole arm, and both the third dipole arm and the fourth dipole arm are combined with each other. The connecting arm is electrically connected, and the third vibrator arm and the fourth vibrator arm are spaced apart.
8. The dual-frequency antenna according to claim 8, wherein the second radiating part generates a resonant wave with a wavelength in the second radiation frequency band when radiated, and the length of the third dipole arm is a wavelength in the second radiation frequency band. 1/8 to 3/4 of the wavelength of the resonant wave, and the length of the fourth oscillator arm is 1/8 to 3/4 of the wavelength of the resonant wave of the wavelength of the second radiation frequency band.
7. The dual-band antenna according to claim 7, wherein the second radiating part further comprises a third radiating patch, and the side of the connected arm close to the first radiating part and the third radiating patch Electrical connection.
The dual-frequency antenna according to claim 7, wherein the third radiation patch includes a fifth dipole arm and a sixth dipole arm, and both the fifth dipole arm and the sixth dipole arm are connected to the The connecting arm is electrically connected, and the fifth vibrator arm, the sixth vibrator arm and the connecting arm enclose a groove.
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 the like as claimed in claim 1- The dual-frequency antenna according to any one of 11, wherein the dual-frequency antenna is arranged in the landing gear.