Omnidirectional planar conformal antenna and aircraft

Abstract

The utility model provides an omnidirectional planar conformal antenna and an aircraft, relates to the technical field of communication equipment, and is used for solving the problem that the conformal antenna of the aircraft affects the flight efficiency of the aircraft, and the omnidirectional planar conformal antenna comprises a flexible reflecting plate, a flexible dielectric substrate, a plurality of planar antennas and a feed network. The flexible dielectric substrate is connected with the flexible reflecting plate, and the flexible reflecting plate and the flexible dielectric substrate are arranged at an interval; the plurality of planar antennas are connected with the flexible dielectric substrate, and the polarization directions of the plurality of planar antennas are arranged outwards so as to form omnidirectional coverage of signals; the feed network is connected with the flexible dielectric substrate and electrically connected with the plurality of planar antennas, and the feed network is used for transmitting signals.

Description

Technical Field

[0001] The present application relates to the technical field of communication equipment, and in particular to an omnidirectional planar conformal antenna and an aircraft. Background Art

[0002] Most of the communication antennas installed on existing aircraft are monopole antennas. When this type of antenna is designed to conform to the aircraft, it is conformally bent and fitted in the vertical direction of the cylindrical structure. This installation method causes the antenna to easily resonate during flight, affecting the stability of the antenna. In order to solve the resonance problem, the antenna length must be reduced, resulting in low antenna gain and limited coverage. If the length of the antenna is increased, the increase in the antenna length will cause the antenna to affect the aerodynamic stability of the aircraft and affect the flight efficiency of the aircraft.

[0003] Therefore, the conformal antenna of an aircraft affects the flight efficiency of the aircraft, which is a technical problem that needs to be solved. Utility Model Content

[0004] The present application provides an omnidirectional planar conformal antenna and an aircraft, which are used to solve the problem that the conformal antenna of an aircraft affects the flight efficiency of the aircraft.

[0005] In a first aspect of the present application, an omnidirectional planar conformal antenna is provided, comprising: a flexible reflector, a flexible dielectric substrate, a plurality of planar antennas and a feeding network; the flexible dielectric substrate is connected to the flexible reflector, and the flexible reflector and the flexible dielectric substrate are spaced apart; the plurality of planar antennas are all connected to the flexible dielectric substrate, and the polarization directions of the plurality of planar antennas are all arranged outward to form omnidirectional coverage of the signal; the feeding network is connected to the flexible dielectric substrate and is electrically connected to the plurality of planar antennas, and the feeding network is used to transmit the signal.

[0006] It is understandable that when it is necessary to design an omnidirectional planar conformal antenna to be conformal to the aircraft, the flexible reflector can be fitted to the aircraft. The omnidirectional planar conformal antennas all use flexible reflectors and flexible dielectric substrates. The flexible material allows the omnidirectional planar conformal antenna to be bent to different degrees, so that the omnidirectional planar conformal antenna can be fitted to different shapes of different parts of the aircraft, thereby making it easier for the omnidirectional planar antenna to fit conformally with the aircraft. The omnidirectional planar conformal antennas all use multiple planar antennas to achieve omnidirectional radiation, reduce the cross-sectional height of the omnidirectional planar antenna, and thus reduce the wind resistance and resonance of the omnidirectional planar antenna, and reduce the impact of the omnidirectional planar conformal antenna on the flight efficiency of the aircraft.

[0007] In some embodiments of the present application, a plurality of planar antennas and a feeding network are etched on a flexible dielectric substrate.

[0008] In this way, by etching multiple planar antennas and feeding networks on a flexible dielectric substrate, the wind resistance of the planar antennas and feeding networks can be reduced, resonance between the multiple planar antennas and feeding networks and the aircraft can be avoided, and the impact of the omnidirectional planar conformal antenna on the flight efficiency of the aircraft can be reduced.

[0009] In some embodiments of the present application, the multiple planar antennas include: a first planar antenna, a second planar antenna, a third planar antenna and a fourth planar antenna, the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are all planar end-fire antennas, and the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are evenly spaced around the center of the flexible dielectric substrate.

[0010] In this way, the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are all set as planar end-fire antennas, and are evenly spaced around the center of the flexible dielectric substrate, so that each planar end-fire antenna has a different polarization direction, and the four planar antenna units in different directions jointly synthesize an omnidirectional radiation pattern to achieve omnidirectional coverage of the signal.

[0011] In some embodiments of the present application, the feeding network also includes: four equal-amplitude power dividers connected to the flexible dielectric substrate, the four equal-amplitude power dividers including: four first ports and a second port, the four first ports being electrically connected to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna, respectively; the second port being electrically connected to the first port for receiving signals.

[0012] In this way, the second port can be used to receive signals sent by the aircraft, and the feeding network can transmit the received signals through the four first ports to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna, and then transmit them through multiple planar antennas, thereby improving the working efficiency of multiple planar antennas.

[0013] In some embodiments of the present application, the four-equal-amplitude power divider also includes: a floor and a line, which are arranged on one side of the flexible dielectric substrate close to the flexible reflector; one end of the line is connected to the floor, and the other end of the line passes through the flexible dielectric substrate and is connected one by one to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna.

[0014] In this way, the floor of the four equal-amplitude power divider is set on the side of the flexible dielectric substrate close to the flexible reflector, so that the floor can reflect the multiple planar antennas, further improving the strength of the planar antenna transmission signal. The line can connect the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna to the four equal-amplitude power divider, so that the signals received by the multiple planar antennas can be smoothly transmitted to the aircraft.

[0015] In some embodiments of the present application, the planar antenna includes: a plurality of dipoles connected to a flexible dielectric substrate for transmitting or receiving signals; a plurality of dipole arms connected to the flexible dielectric substrate, one end of the dipole arm being electrically connected to the first port, and the other end being electrically connected to the dipole.

[0016] In this way, the vibrator arm can connect the vibrator to the feeding network and transmit the signal sent by the feeding network to the vibrator. Multiple vibrators have the function of guiding and amplifying electromagnetic waves. Multiple vibrators can make the electromagnetic signal received by the antenna stronger and improve the antenna's ability to transmit signals.

[0017] In some embodiments of the present application, it also includes: a support member, which is arranged between the flexible transmitting plate and the flexible dielectric substrate, and is respectively connected to the flexible transmitting plate and the flexible dielectric substrate, and the distance between the flexible reflector and the flexible dielectric substrate is H, H≤0.25λ, and λ is the wavelength of the planar antenna.

[0018] In this way, the support plate can support the flexible dielectric substrate, so that the multiple planar antennas on the dielectric substrate are spaced apart from the flexible reflector, and the distance between the flexible reflector and the flexible dielectric substrate is H, H≤0.25λ, λ is the wavelength of the planar antenna, thereby improving the efficiency of the flexible reflector in reflecting the signals emitted by the multiple planar antennas.

[0019] In some embodiments of the present application, the plane where the multiple planar antennas are located is parallel to the flexible reflector and is arranged at intervals.

[0020] In this way, the plane where the multiple planar antennas are located is parallel to the flexible reflector and arranged at intervals, so that the flexible reflector can reflect the signals emitted by the multiple planar antennas, and can reflect the signals of the planar antennas to the setting direction of the omnidirectional planar conformal antenna, thereby avoiding the omnidirectional planar conformal antenna from affecting the function of transmitting or receiving signals due to the deviation of the setting direction of the flexible reflector.

[0021] A second aspect of the present application provides an aircraft with an omnidirectional planar conformal antenna, comprising: the above-mentioned omnidirectional planar conformal antenna.

[0022] It can be understood that the technical effect of the aircraft with the omnidirectional planar conformal antenna is the same as the technical effect of the first aspect mentioned above, and the present application will not elaborate on it here.

[0023] In some embodiments of the present application, the feed network includes: four equal-amplitude power dividers connected to the flexible dielectric substrate, the four equal-amplitude power dividers include: four first ports and second ports, the four first ports are electrically connected to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna respectively; the second port is electrically connected to the first port for receiving signals. The aircraft includes: an aircraft body and a signal processing device, the flexible reflector is fitted and connected to the aircraft body, the flexible dielectric substrate is arranged on the side of the flexible reflector away from the aircraft body; the signal processing device is electrically connected to the second port.

[0024] In this way, the omnidirectional planar conformal antenna can be made conformal to the main body of the aircraft, reducing the impact of the omnidirectional planar conformal antenna on the aircraft. The signal processing device can process the signal transmitted by the omnidirectional planar conformal antenna, and can also transmit the signal to be sent to the omnidirectional planar conformal antenna, so that the omnidirectional planar conformal antenna can transmit to the device that needs to receive it, so that the aircraft can exchange information with other devices, thereby improving the practicality of the aircraft with the omnidirectional planar conformal antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0026] Figure 1 A schematic diagram of the structure of an omnidirectional planar conformal antenna provided in an embodiment of the present application;

[0027] Figure 2 A top view of an omnidirectional planar conformal antenna provided in an embodiment of the present application;

[0028] Figure 3 A side view of an omnidirectional planar conformal antenna provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a feeding network provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of a first installation of a planar antenna provided in an embodiment of the present application;

[0031] Figure 6 A second installation diagram of the planar antenna provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing a pipeline, the "connected" and "connection" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0036] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0037] Most of the communication antennas installed on existing aircraft are monopole antennas. When this type of antenna is designed to conform to the aircraft, it is conformally bent and fitted in the vertical direction of the cylindrical structure. This installation method causes the antenna to easily resonate during flight, affecting the stability of the antenna. In order to solve the resonance problem, the antenna length must be reduced, resulting in low antenna gain and limited coverage. If the length of the antenna is increased, the increase in the antenna length will cause the antenna to affect the aerodynamic stability of the aircraft and affect the flight efficiency of the aircraft.

[0038] Therefore, if Figure 1 As shown, the present application provides an omnidirectional planar conformal antenna 100 , comprising: a flexible reflector 10 , a flexible dielectric substrate 20 , a plurality of planar antennas 30 and a feeding network 40 .

[0039] Another example Figure 1 As shown, the flexible dielectric substrate 20 is connected to the flexible reflector 10, and the flexible reflector 10 is spaced apart from the flexible dielectric substrate 20. Multiple planar antennas 30 are connected to the flexible dielectric substrate 20, and the polarization directions of the multiple planar antennas 30 are all set outward to form omnidirectional coverage of the signal. The feeding network 40 is connected to the flexible dielectric substrate 20 and is electrically connected to the multiple planar antennas 30, and the feeding network 40 is used to transmit signals.

[0040] Among them, the flexible reflection plate 10 can improve the receiving sensitivity of the antenna signal. The flexible reflection plate 10 can be made of materials such as silver, copper, and aluminum, and this application does not limit this.

[0041] It should be noted that the material of the flexible dielectric substrate 20 can be polyimide film, polyester film, liquid crystal polymer or resin. In addition, polymer film, such as polyethylene phthalate or aramid, can also be used, and this application does not limit this.

[0042] In addition, polyimide film has excellent tensile strength, is very stable in a wide operating temperature range of -200O C to 300O C, has chemical corrosion resistance, excellent electrical properties, is highly durable and has excellent heat resistance, and unlike other thermosetting resins, it can maintain its elasticity even after thermal polymerization. Polyester film has good electrical and mechanical properties. The liquid crystal polymer substrate has a moisture resistance and moisture resistance of 0.04%, can be injection molded and pressed into a flexible dielectric substrate 20, and can be easily recycled. The resin can be a modified epoxy resin or an acrylic resin, and the resin, copper foil and substrate are laminated to form a "laminate", which is called a flexible copper-clad laminate, which is formed by applying high temperature and high pressure to the laminate through automatic pressing under a controlled environment, and the modified epoxy resin and acrylic resin have strong adhesion properties.

[0043] The shapes of the flexible dielectric substrate 20 and the flexible reflective plate 10 may be circular or square, etc., which is not limited in the present application.

[0044] The planar antenna 30 means that most or all elements of the antenna are located in a plane. The planar antenna 30 reduces the amount of space required for receiving wireless charging signals, making it easier to install the planar antenna 30 on the required equipment.

[0045] Among them, the feeding network 40 is a device that transmits the electrical signal sent by the device to the antenna element 35, constitutes a radio frequency transmission path, and realizes functions such as impedance matching and amplitude and phase distribution. This application does not limit the type of the feeding network 40.

[0046] It can be understood that when the omnidirectional planar conformal antenna 100 needs to be designed to be conformal with the aircraft, the flexible reflector 10 can be fitted with the aircraft. The omnidirectional planar conformal antenna 100 adopts a flexible reflector 10 and a flexible dielectric substrate 20. The flexible material allows the omnidirectional planar conformal antenna 100 to be bent to different degrees, so that the omnidirectional planar conformal antenna 100 can be fitted with different shapes of different parts of the aircraft, thereby making it easier for the omnidirectional planar antenna 30 to be conformal with the aircraft. The omnidirectional planar conformal antenna 100 adopts multiple planar antennas 30 to achieve omnidirectional radiation, reduce the cross-sectional height of the omnidirectional planar antenna 30, and thus reduce the wind resistance and resonance of the omnidirectional planar antenna 30, and reduce the impact of the omnidirectional planar conformal antenna 100 on the flight efficiency of the aircraft.

[0047] In some embodiments of the present application, the plurality of planar antennas 30 and the feeding network 40 are etched on the flexible dielectric substrate 20 .

[0048] Etching can be divided into photochemical etching process, metal screen printing etching process, graphic electroplating etching process, full-board electroplating masking method and ultra-thin copper foil rapid etching process, which is not limited in this application.

[0049] It should be noted that the photochemical etching process is to evenly coat a layer of photosensitive glue or anti-corrosion dry film on the clean copper-clad board, and obtain the power circuit image according to the photographic plate exposure, development, film solidification and etching process. The characteristics of this type of processing technology are high-precision graphics and short production cycle time, which is suitable for mass production and multi-variety production.

[0050] The metal screen printing etching process is to place the template with the required circuit pattern prepared in advance on the copper surface of the clean copper clad board, and use a scraper to print the anti-corrosion material on the copper foil surface to obtain the printed material pattern. After drying, the chemical etching process is carried out to remove the bare copper part without printing material covering, and finally remove the printing material, which is the required circuit pattern.

[0051] The pattern electroplating etching process uses a photosensitive film for pattern migration as a dry anti-corrosion film.

[0052] The ultra-thin copper foil rapid etching process is applied to laminates with thin copper foil. After the pattern is electroplated with copper, the thickness of the circuit pattern part and the metal copper at the hole edge is about 30μm, and the copper foil that is not part of the circuit pattern is still the thickness of the thin copper foil. The etching process is carried out quickly on it, and the non-circuit part is etched away, leaving only a small part of the etched circuit pattern. This method can produce high-precision and dense circuit boards.

[0053] In this way, by etching multiple planar antennas 30 and feeding networks 40 on the flexible dielectric substrate 20, not only can the communication function of the planar antenna 30 be realized, but also the wind resistance of the planar antenna 30 and the feeding network 40 can be reduced, thereby avoiding resonance between the multiple planar antennas 30 and the feeding network 40 and the aircraft, and reducing the impact of the omnidirectional planar conformal antenna 100 on the flight efficiency of the aircraft.

[0054] In some embodiments of the present application, Figure 2 As shown, the multiple planar antennas 30 include: a first planar antenna 31, a second planar antenna 32, a third planar antenna 33 and a fourth planar antenna 34, the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 are all planar end-fire antennas, and the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 are evenly spaced around the center of the flexible dielectric substrate 20.

[0055] Among them, the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 are all configured as planar end-fire antennas, and are all directional antennas that can generate directional radiation patterns.

[0056] In this way, the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 are all set as planar end-fire antennas, and are evenly spaced around the center of the flexible dielectric substrate 20, so that each planar end-fire antenna has a different polarization direction, and the four planar antenna 30 units in different directions jointly synthesize an omnidirectional radiation pattern to achieve omnidirectional coverage of the signal.

[0057] In some embodiments of the present application, Figure 2 As shown, the feeding network 40 also includes: four equal-amplitude power dividers 41, connected to the flexible dielectric substrate 20, and the four equal-amplitude power dividers 41 include: four first ports 411 and second ports 412, the four first ports 411 are electrically connected to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 respectively; the second port 412 is electrically connected to the first port 411 for receiving signals.

[0058] The second port 412 may be disposed at the center of the flexible dielectric substrate 20 , and the four first ports 411 may be evenly spaced around the second port 412 .

[0059] It should be noted that the four-equal-amplitude power divider 41 is called a one-to-four equal-amplitude power divider, which is a device that divides one input signal energy into four equal or unequal output energy, and can also combine four signal energies into one output, which can also be called a combiner. A certain degree of isolation should be ensured between the output ports of a four-equal-amplitude power divider 41. The main technical parameters of the four-equal-amplitude power divider 41 include power loss, voltage standing wave ratio of each port, isolation between power distribution ports, amplitude balance, phase balance, power capacity and bandwidth, etc., which are not limited in this application.

[0060] In this way, the second port 412 can be used to receive signals sent by the aircraft, and the feeding network 40 can transmit the received signals through the four first ports 411 to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34, and then transmit them through multiple planar antennas 30, thereby improving the working efficiency of the multiple planar antennas 30.

[0061] In a possible structural design, the second port 412 may be disposed at the center of the flexible dielectric substrate 20 , and the four first ports 411 may be evenly spaced around the second port 412 .

[0062] In this way, the four first ports 411 can be connected to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 respectively, and the second port 412 is set at the center of the four first ports 411, which can facilitate the second port 412 to be connected to the four first ports 411, and also facilitate the four first ports 411 to be connected to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 respectively, thereby improving the convenience of installing the omnidirectional planar conformal antenna 100.

[0063] In some embodiments of the present application, Figure 3 As shown, the four equal-amplitude power divider 41 also includes: a floor 413 and a line 414, which are arranged on a side of the flexible dielectric substrate 20 close to the flexible reflector 10; one end of the line 414 is connected to the floor 413, and the other end of the line 414 passes through the flexible dielectric substrate 20 and is connected one by one to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34.

[0064] In this way, the floor 413 of the four equal-amplitude power divider 41 is set on the side of the flexible dielectric substrate 20 close to the flexible reflector 10, so that the floor 413 reflects the multiple planar antennas 30, further improving the strength of the signal transmitted by the planar antennas 30. The line 414 can connect the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 to the four equal-amplitude power divider 41, so that the signals received by the multiple planar antennas 30 can be smoothly transmitted to the aircraft.

[0065] like Figure 4 As shown, in some embodiments of the present application, the planar antenna 30 includes: a plurality of dipoles 35 connected to the flexible dielectric substrate 20 for transmitting or receiving signals; a plurality of dipole arms 36 connected to the flexible dielectric substrate 20, one end of the dipole arm 36 being electrically connected to the first port 411, and the other end being electrically connected to the dipole 35.

[0066] In this way, the vibrator arm 36 can connect the vibrator 35 to the feeding network 40, and transmit the signal sent by the feeding network 40 to the vibrator 35. The multiple vibrators 35 have the function of guiding and amplifying electromagnetic waves. The multiple vibrators 35 can make the electromagnetic signal received by the antenna stronger and improve the antenna's ability to transmit signals.

[0067] In a possible structural design, such as Figure 5 As shown, the planar antenna 30 may include: two dipoles 35 and two dipole arms 36, namely, a first dipole 351 and a second dipole 352, a first dipole arm 361 and a second dipole arm 362, the first dipole 351 is connected to the first dipole arm 361, and the first dipole 351 is connected to the second dipole arm 362. The first dipole 351 and the second dipole 352 are symmetrically arranged, and the first dipole arm 361 and the second dipole arm 362 are symmetrically arranged. The first dipole 351 and the first dipole arm 361 are arranged on a side of the flexible dielectric substrate 20 away from the flexible transmitting plate, the first dipole 351 and the first dipole arm 361 are connected to the line 414 of the four equal-amplitude power divider 41, the second dipole 352 and the second dipole arm 362 are arranged on a side of the flexible dielectric substrate 20 close to the flexible reflector 10, and the second dipole 352 and the second dipole arm 362 are connected to the floor 413 of the four equal-amplitude power divider 41.

[0068] In this way, the first dipole 351 and the second dipole 352 can send the signal transmitted by the feeding network 40 to the planar antenna 30 to the device that needs to receive it, and the first dipole arm 361 and the second dipole arm 362 can respectively support the first dipole 351 and the second dipole 352 to prevent the first dipole 351 and the second dipole 352 from falling off, and the first dipole 351 and the second dipole 352 can form a dual dipole 35 antenna. This type of antenna has a simple structure and is easy to feed.

[0069] In another possible structural design, Figure 6 As shown, the planar antenna 30 may also include: two dipoles 35 and two dipole arms 36, namely, a first dipole 351 and a second dipole 352, a first dipole arm 361 and a second dipole arm 362, the first dipole 351 is connected to the first dipole arm 361, and the first dipole 351 is connected to the second dipole arm 362. The first dipole 351 and the second dipole 352 are symmetrically arranged, and the first dipole arm 361 and the second dipole arm 362 are symmetrically arranged. The first dipole 351 and the first dipole arm 361 are arranged on a side of the flexible dielectric substrate 20 away from the flexible transmitting plate, the first dipole 351 and the first dipole arm 361 are connected to the line 414 of the four equal-amplitude power divider 41, the second dipole 352 and the second dipole arm 362 are also arranged on a side of the flexible dielectric substrate 20 away from the flexible reflector 10, and the second dipole 352 and the second dipole arm 362 are connected to the floor 413 of the four equal-amplitude power divider 41 through a through hole.

[0070] In this way, the first vibrator 351 , the first vibrator arm 361 , the second vibrator 352 and the second vibrator arm 362 can be arranged on the same side, and the first vibrator 351 and the second vibrator 352 can be processed simultaneously during production, thereby improving production efficiency.

[0071] In some embodiments of the present application, Figure 3 As shown, the omnidirectional planar conformal antenna 100 also includes: a support member 50, which is arranged between the flexible transmitting plate and the flexible dielectric substrate 20, and is connected to the flexible transmitting plate and the flexible dielectric substrate 20 respectively, and the distance between the flexible reflector 10 and the flexible dielectric substrate 20 is H, H≤0.25λ, and λ is the wavelength of the planar antenna 30.

[0072] In this way, the support plate can support the flexible dielectric substrate 20, so that the multiple planar antennas 30 on the dielectric substrate are spaced apart from the flexible reflector 10, and the distance between the flexible reflector 10 and the flexible dielectric substrate 20 is H, H≤0.25λ, λ is the wavelength of the planar antenna 30, thereby improving the efficiency of the flexible reflector 10 in reflecting the signals emitted by the multiple planar antennas 30.

[0073] In a possible structural design, the distance between the flexible reflector 10 and the flexible dielectric substrate 20 is H, where H=0.25λ, and λ is the wavelength of the planar antenna 30 .

[0074] In a possible structural design, the support member 50 may be disposed at the center of the flexible dielectric substrate 20 , that is, one end of the support member 50 is connected to the center of the flexible dielectric substrate 20 , and the other end is connected to the center of the flexible reflective plate 10 .

[0075] In this way, the force on the flexible dielectric substrate 20 can be made more uniform, thereby preventing the flexible dielectric substrate 20 from breaking due to uneven force, causing the flexible dielectric substrate 20 to fall off, thereby affecting the normal operation of the omnidirectional planar conformal antenna 100.

[0076] In a possible structural design, the omnidirectional planar conformal antenna 100 may include a plurality of support members 50 , each of which is connected to the flexible reflector 10 and the flexible dielectric substrate 20 , and the plurality of support members 50 are arranged in parallel and at intervals between the flexible reflector 10 and the flexible dielectric substrate 20 .

[0077] In this way, multiple support members 50 can jointly support the flexible dielectric substrate 20, making the connection between the flexible dielectric substrate 20 and the flexible reflector 10 more secure, thereby preventing the support members 50 from breaking and causing the flexible dielectric substrate 20 to fall off, thereby affecting the normal operation of the omnidirectional planar conformal antenna 100.

[0078] In some embodiments of the present application, Figure 3 As shown, the plane where the multiple planar antennas 30 are located is parallel to the flexible reflector 10 and is arranged at intervals.

[0079] In this way, the plane where the multiple planar antennas 30 are located is parallel to the flexible reflector 10 and arranged at intervals, so that the flexible reflector 10 can reflect the signals emitted by the multiple planar antennas 30, and can reflect the signals of the planar antennas 30 to the setting direction of the omnidirectional planar conformal antenna 100, thereby avoiding the omnidirectional planar conformal antenna 100 from transmitting or receiving signals due to the deviation of the setting direction of the flexible reflector 10.

[0080] In a second aspect of the present application, an aircraft having an omnidirectional planar conformal antenna 100 is provided, comprising: the above-mentioned omnidirectional planar conformal antenna 100 .

[0081] It can be understood that the technical effect of the aircraft with the omnidirectional planar conformal antenna 100 is the same as the technical effect of the first aspect mentioned above, and the present application will not elaborate on it here.

[0082] In some embodiments of the present application, the feeding network 40 includes: four equal-amplitude power dividers 41, connected to the flexible dielectric substrate 20, the four equal-amplitude power dividers 41 include: four first ports 411 and a second port 412, the four first ports 411 are electrically connected to the first planar antenna 31, the second planar antenna 32, the third planar antenna 33 and the fourth planar antenna 34 respectively; the second port 412 is electrically connected to the first port 411 for receiving signals; the aircraft includes: an aircraft body and a signal processing device, the flexible reflector 10 is fitted and connected to the aircraft body, the flexible dielectric substrate 20 is arranged on the side of the flexible reflector 10 away from the aircraft body; the signal processing device is electrically connected to the second port 412.

[0083] Among them, the flexible reflective plate 10 can be connected to the plane of the aircraft body, and can also be connected to the curved surface of the aircraft body. The connection method can be adhesive connection, magnetic adsorption or bolt connection, which is not limited in this application.

[0084] In this way, the omnidirectional planar conformal antenna 100 can be conformal to the main body of the aircraft, reducing the impact of the omnidirectional planar conformal antenna 100 on the aircraft. The signal processing device can process the signal transmitted by the omnidirectional planar conformal antenna 100, and can also transmit the signal to be sent to the omnidirectional planar conformal antenna 100, so that the omnidirectional planar conformal antenna 100 can transmit to the device that needs to receive it, so that the aircraft can exchange information with other devices, thereby improving the practicality of the aircraft with the omnidirectional planar conformal antenna 100.

[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An omnidirectional planar conformal antenna, characterized in that: include: Flexible reflective panels; A flexible dielectric substrate connected to the flexible reflector, wherein the flexible reflector and the flexible dielectric substrate are spaced apart from each other; A plurality of planar antennas are connected to the flexible dielectric substrate, and the polarization directions of the plurality of planar antennas are all arranged outward to form omnidirectional coverage of the signal; A feeding network is connected to the flexible dielectric substrate and electrically connected to the plurality of planar antennas, and the feeding network is used for transmitting signals.

2. The omnidirectional planar conformal antenna according to claim 1, characterized in that: The plurality of planar antennas and the feed network are etched on the flexible dielectric substrate.

3. The omnidirectional planar conformal antenna according to claim 1, characterized in that: The plurality of planar antennas include: A first planar antenna, a second planar antenna, a third planar antenna and a fourth planar antenna, wherein the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are all planar end-fire antennas, and the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are evenly spaced around the center of the flexible dielectric substrate.

4. The omnidirectional planar conformal antenna according to claim 3, characterized in that: The feeding network further comprises: Four equal-amplitude power dividers are connected to the flexible dielectric substrate, and the four equal-amplitude power dividers include: four first ports, electrically connected to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna respectively; The second port is electrically connected to the first port and is used to receive signals.

5. The omnidirectional planar conformal antenna according to claim 4, characterized in that: The four equal-amplitude power divider also includes: A floor, arranged on a side of the flexible dielectric substrate close to the flexible reflective plate; A circuit, one end of which is connected to the floor, and the other end of which passes through the flexible dielectric substrate and is connected to the first planar antenna, the second planar antenna, the third planar antenna, and the fourth planar antenna one by one.

6. The omnidirectional planar conformal antenna according to claim 5, characterized in that: The planar antenna comprises: A plurality of vibrators connected to the flexible dielectric substrate for transmitting or receiving signals; A plurality of vibrator arms are connected to the flexible dielectric substrate, one end of the vibrator arm is electrically connected to the first port, and the other end of the vibrator arm is electrically connected to the vibrator.

7. The omnidirectional planar conformal antenna according to claim 1, characterized in that: Also includes: A support member, wherein the support member is disposed between the flexible reflector and the flexible dielectric substrate and is connected to the flexible reflector and the flexible dielectric substrate respectively, wherein a distance between the flexible reflector and the flexible dielectric substrate is H, wherein H≤0.25λ, and λ is a wavelength of the planar antenna.

8. The omnidirectional planar conformal antenna according to claim 1, characterized in that: The planes where the multiple planar antennas are located are parallel to the flexible reflector and are arranged at intervals.

9. An aircraft, characterized in that: include: An omnidirectional planar conformal antenna as described in any one of claims 1 to 8.

10. The aircraft according to claim 9, characterized in that The plurality of planar antennas include: a first planar antenna, a second planar antenna, a third planar antenna and a fourth planar antenna, wherein the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are all planar end-fire antennas, and the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna are evenly spaced around the center of the flexible dielectric substrate; The feeding network comprises: Four equal-amplitude power dividers are connected to the flexible dielectric substrate, and the four equal-amplitude power dividers include: four first ports, electrically connected to the first planar antenna, the second planar antenna, the third planar antenna and the fourth planar antenna respectively; A second port, electrically connected to the first port, for receiving a signal; The aircraft comprises: An aircraft body, the flexible reflector is closely connected to the aircraft body, and the flexible dielectric substrate is arranged on a side of the flexible reflector away from the aircraft body; A signal processing device is electrically connected to the second port.

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