CN219144479U

CN219144479U - Antenna assembly and mobile terminal

Info

Publication number: CN219144479U
Application number: CN202223545749.3U
Authority: CN
Inventors: 邓明罡; 汤一君; 李栋
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-06-06
Anticipated expiration: 2032-12-23

Abstract

The utility model provides an antenna assembly and a mobile terminal, wherein the antenna assembly comprises: the first medium substrate, the second medium substrate and the supporting component are arranged in parallel; the support component is arranged between the first medium substrate and the second medium substrate, so that a space for accommodating air medium is formed between the first medium substrate and the second medium substrate; the support assembly comprises a metal part and a nonmetal part surrounding the metal part, and the metal part of the support assembly is respectively and electrically connected with the metal piece of the first dielectric substrate and the metal piece of the second dielectric substrate. The antenna assembly can be light, and is beneficial to improving the performance of the mobile terminal carrying the antenna assembly.

Description

Antenna assembly and mobile terminal

Technical Field

The present utility model relates to the field of wireless communications technologies, and in particular, to an antenna assembly and a mobile terminal.

Background

An antenna assembly may be provided on the mobile terminal for receiving radio signals transmitted by satellites and for converting the radio signals by the receiver. The antenna with the advantages of strong mobility, multipath fading resistance, small influence of Faraday effect and the like is widely applied to a positioning navigation system of a mobile terminal.

In a mobile terminal positioning system, a traditional antenna achieves the purpose of miniaturization by loading high-dielectric-constant ceramic, but the weight of the ceramic is often larger, and the ceramic brings more load to the mobile terminal, so that the performance of the mobile terminal is affected.

Disclosure of Invention

The utility model provides an antenna assembly and a mobile terminal, and aims to design the antenna assembly so as to realize the light weight of the antenna assembly.

A first aspect of the present utility model provides an antenna assembly comprising:

the first medium substrate, the second medium substrate and the supporting component are arranged in parallel;

the support component is arranged between the first medium substrate and the second medium substrate, so that a space for accommodating air medium is formed between the first medium substrate and the second medium substrate;

the support assembly comprises a metal part and a nonmetal part surrounding the metal part, and the metal part of the support assembly is respectively and electrically connected with the metal piece of the first dielectric substrate and the metal piece of the second dielectric substrate.

A second aspect of the present utility model provides a mobile terminal, the mobile terminal comprising:

the antenna assembly of the first aspect of the utility model.

According to the antenna assembly and the mobile terminal, the supporting assembly is arranged between the first dielectric substrate and the second dielectric substrate, so that a space for accommodating air media is formed between the two dielectric substrates, the weight of the antenna assembly is reduced, and the bandwidth of the antenna assembly is increased to a certain extent.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of embodiments of the utility model.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a top view of the antenna assembly shown in fig. 1;

fig. 3 is a schematic structural diagram of another antenna assembly according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of yet another antenna assembly according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of yet another antenna assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of yet another antenna assembly according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of yet another antenna assembly according to an embodiment of the present utility model;

fig. 8 is a S-parameter result diagram of an antenna assembly according to an embodiment of the present utility model;

FIG. 9 is a graph of axial ratio of an antenna assembly as a function of frequency provided by an embodiment of the present utility model;

FIG. 10 is a graph of axial ratio of an antenna assembly as a function of angle θ provided by an embodiment of the present utility model;

fig. 11 is a diagram of three frequency points of an antenna assembly according to an embodiment of the present utility model, (a) 1.561GHz, (b) 1.575GHz, and (c) 1.602GHz.

Reference numerals

100. An antenna assembly; 1. a radiation unit; 2. a power feeding unit; 3. a metal piece 1; 4. a metal piece 2; 5. a metal piece 3; 6. a metal piece 4; 7. a metal part 1; 8. a metal part 2; 9. a metal part 3; 10. a metal part 4; 11. a nonmetallic portion 1; 12. a nonmetallic portion 2; 13. a non-metal part 3; 14. a non-metal part 4; 15. a projection 1; 16. a projection 2; 17. a projection 3; 18. a projection 4; 19. a first dielectric substrate; 20. a parasitic element; 21. a second dielectric substrate; 22. a feed probe; 23. a via hole 1; 24. a via hole 2; 25. and a grounding assembly.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

It is also to be understood that the terminology used in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Currently, circular polarized antennas with a directional front-to-back ratio, miniaturization, and weight reduction are urgently needed due to the special environment inside some mobile terminals. There are two main approaches to enhance the front-to-back ratio, first, the backward radiation wave is reflected as a forward radiation wave by the loading cavity or the reflective floor. For example, with the loading metal back cavity method, the ideal front-to-back ratio can be achieved, but this limits the application of this type of antenna in mobile terminals due to the large volume and weight of the metal back cavity. Second, by using the concept of "complementary antennas" the radiated waves are made to have an effect of "forward superposition, backward cancellation", typical examples being magneto-electric dipole antennas and electrically small antennas based on the huyghen concept. The broad-side radiation huyghen antenna with simple structure, small electric size and low section is characterized in that the electric dipole and the magnetic dipole forming the antenna are fed through a simple coaxial feed dipole antenna, and the antenna can obtain ideal front-to-back ratio, but has the defects of relatively high section and no floor, so that the application of the antenna in certain terminal equipment is limited.

In a positioning system of a mobile terminal, a conventional antenna achieves the purpose of miniaturization by loading high-dielectric-constant ceramic, but the ceramic tends to have a relatively large weight, which brings a greater load to the mobile terminal, thereby affecting the performance of the mobile terminal.

In order to solve the technical problems, the embodiment of the utility model provides an antenna assembly and a mobile terminal, and aims to design the antenna assembly to realize the weight reduction of an antenna.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

The antenna assembly provided by the embodiment of the utility model can be applied to a mobile terminal, and particularly can be applied to navigation positioning of the mobile terminal. The mobile terminal may include a movable device that actively or passively moves in the sea, land, and air. Alternatively, the mobile device may comprise at least one of an aircraft, a mobile robot, an unmanned vehicle, an unmanned ship, and the like. Further, the aircraft may be an unmanned aircraft, which may include a rotary-wing type unmanned aerial vehicle, such as a four-rotor type unmanned aerial vehicle, a six-rotor type unmanned aerial vehicle, an eight-rotor type unmanned aerial vehicle, or a fixed-wing type unmanned aerial vehicle. In some embodiments, the antenna assembly is mounted in a receiving cavity within the fuselage of the aircraft. Alternatively, the antenna assembly may be provided on other structures of the aircraft, such as foot rests, arms, etc.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an antenna assembly 100 according to an embodiment of the utility model. Fig. 1 is a front view of the antenna assembly 100, and fig. 2 is a top view of the antenna assembly 100 shown in fig. 1, and it is noted that the different dielectric substrates of the antenna assembly 100 are partially overlapped in fig. 2 due to the limitation of the top view. The antenna assembly 100 comprises a first dielectric substrate 19, a second dielectric substrate 21 and a support assembly which are arranged in parallel;

the support assembly is disposed between the first dielectric substrate 19 and the second dielectric substrate 21 such that a space for accommodating an air medium is formed between the first dielectric substrate 19 and the second dielectric substrate 21;

the support assembly comprises a metal part 7 and a non-metal part 11 surrounding said metal part 7, the metal part 7 of the support assembly being electrically connected with the metal part 3 of the first dielectric substrate 19 and the metal part of the second dielectric substrate 21, respectively.

Alternatively, the metal portion 7 may be a shorting pin. Alternatively, the two ends of the nonmetallic portion 11 of the support assembly abut against the first dielectric substrate 19 and the second dielectric substrate 21, respectively, to provide stable supporting force. The nonmetallic portion 11 may be nylon, or may be replaced by other supporting materials, such as foaming materials, etc. Optionally, the non-metallic portion 11 comprises nylon support posts that enclose the shorting pin.

Because the supporting component supports the upper dielectric substrate and the lower dielectric substrate, the inner side of the supporting component is the metal part 7 for electrically connecting the first dielectric substrate 19 and the second dielectric substrate 21, the outer side of the supporting component surrounding the metal part 7 adopts the nonmetal part 11 made of nylon, and meanwhile, the nonmetal part 11 can play a role in stabilizing and supporting and can also isolate the metal part 7 to a certain extent, so that a space for accommodating air media is formed between the two dielectric substrates, and compared with a ceramic antenna, the antenna component 100 in the embodiment has lighter weight.

In some embodiments, the distance between the first dielectric substrate 19 and the second dielectric substrate 21 is about 0.03 dielectric wavelengths. Alternatively, the first dielectric substrate 19 is made of Rogers 4003C, has a thickness of about 0.003 times the vacuum wavelength, and has a size of about 0.17×0.17 times the dielectric wavelength. Alternatively, the second dielectric substrate 21 is a multilayer board made by laminating Rogers 4003C and FR4, having a thickness of about 0.006 times the vacuum wavelength and a size of about 0.23×0.23 times the dielectric wavelength. Optionally, the upper layer of the second dielectric substrate 21 is a Rogers 4003C dielectric board, and the lower layer is an FR4 dielectric board. Alternatively, in practical designs, the dielectric substrate may be other plates, and the dielectric constant of the plates may affect the resonant size of the antenna assembly 100. Alternatively, in order to improve the radiation efficiency, a high-frequency plate having a lower loss tangent may be used.

In some embodiments, the support assembly includes a plurality of support posts equidistant from the connection point of the first dielectric substrate 19 to the feed center point of the first dielectric substrate 19.

Optionally, the support assembly comprises four support columns. Alternatively, the connection points of the support columns and the first dielectric substrate 19 form a center symmetrical pattern.

In some embodiments, the antenna assembly 100 includes a radiating element 1, a feed element 2;

the first dielectric substrate 19 includes a first surface and a second surface opposite to each other, the radiation unit 1 is disposed on the first surface, the radiation unit 1 is configured to receive or transmit electromagnetic wave signals, and the feeding unit 2 is disposed on the first surface and/or the second surface;

the feeding unit 2 is not directly connected to the radiating unit 1, and the feeding unit 2 is electromagnetically coupled to the radiating unit 1.

Since the input impedance of the antenna assembly 100 is large as a whole and the antenna cannot be matched by directly feeding with the coaxial probe, the feeding unit 2 of the antenna assembly 100 is fed by coupling feeding.

Optionally, the radiating element 1 is configured to receive or transmit electromagnetic wave signals in at least two frequency bands, so as to implement multi-band compatibility of the antenna assembly 100. Optionally, the two frequency bands include a B1 frequency band (1.561 GHz) covering the beidou satellite navigation system and an L1 frequency band (1.575 GHz) of the GPS navigation system. Optionally, the L1 frequency band (1.602 GHz) covering the GLONASS navigation system is also included.

In some embodiments, the antenna assembly 100 includes a radiating element 1 and a feeding element 2 disposed on a first dielectric substrate 19;

the main body part of the radiating element 1 is of a fully enclosed structure, and encloses the feeding element 2.

Optionally, the main body portion of the radiating element 1 comprises a first portion, a second portion and a third portion;

the first part of the radiating element 1 is arranged close to the edge of the first dielectric substrate 19, the second part of the radiating element 1 is arranged away from the edge of the first dielectric substrate 19, the first part is at a distance from the edge, the second part is at a distance from the edge, and the first part is connected to the second part via a third part. The radiation element 1 of the antenna assembly 100 is routed through the arrangement of a plurality of different portions to achieve a curved routing of the radiation element 1, thereby reducing the size of the antenna assembly 100.

Alternatively, the radiating element 1 comprises annular radiators connected end to end. Alternatively, the ring comprises a square ring structure, a circular ring structure, a rounded square ring structure, a rounded rectangular ring structure, a rectangular ring structure, or an elliptical ring structure.

In some embodiments, the radiating element 1 is printed on the upper surface of the first dielectric substrate 19. Optionally, the circumference of the radiating element 1 is smaller than one vacuum wavelength of the operating frequency to achieve miniaturization of the antenna assembly 100. The side length of the radiating element 1 of a conventional patch antenna is 1/2 of the dielectric wavelength at the resonance frequency. Alternatively, in the embodiment of the present utility model, the side length of the radiating element 1 may use 1/4 of the dielectric wavelength at the resonance frequency, so that the antenna assembly 100 is miniaturized.

In some embodiments, the radiating element 1 further comprises a protrusion 15, a first end of the protrusion 15 being connected to the main body portion of the radiating element 1, and a second end of the protrusion 15 being open.

Alternatively, the projection 15 of the radiating element 1 may be a tuning stub, the length of which is used to adjust the resonance frequency. Optionally, tuning stubs are provided at the first part and/or the second part of the radiating element 1. Optionally, a tuning stub is provided at the bent portion of the radiating element 1. Optionally, the number of tuning stubs is four.

In some embodiments, the antenna assembly 100 has great flexibility in shape and can be adapted to a variety of application scenarios. Alternatively, in a practical design, the position and structure of the protruding portion 15 of the radiation unit 1 may be changed according to application requirements, for example, the position of the protruding portion 15 may be placed at four central positions of the radiation unit 1, and the inside of the protruding portion 15 is connected to the radiation unit 1 and extended outward. Alternatively, to further miniaturize the antenna assembly 100, the protruding portion 15 may be bent inward, so as to ensure that the protruding portion 15 is connected to the radiating element 1 at one end and is open at the other end.

In some embodiments, the antenna assembly 100 includes a radiating element 1 disposed on a first dielectric substrate 19;

the metal member 3 of the first dielectric substrate 19 is not directly connected to the radiating element 1, and the metal member 3 is electromagnetically coupled to the radiating element 1.

In some embodiments, the metal member 3 of the first dielectric substrate 19 may be a shorting patch printed on the upper surface of the first dielectric substrate 19 and electrically connected to the second dielectric substrate 21 through the metal portion 7 of the support assembly. Alternatively, the shape of the metal member 3 may be changed according to the application requirements, for example, the shape of the metal member 3 may be set to be square, ring-shaped, fan-shaped, trapezoid, or the like.

The metal piece 3 and the radiating unit 1 are in electromagnetic coupling relation, no metal contact exists, and the miniaturization of the antenna assembly 100 can be realized by the capacitive effect generated by the coupling between the metal piece 3 and the radiating unit 1. By way of example, four metal pieces, such as shorting patches, comprising

metal pieces

3, 4, 5, 6 are respectively mounted at the inner four corners of the bent radiating element 1 and connected to the ground assembly 25 of the second dielectric substrate 21 by shorting pins. The interaction between the short-circuit patch and the radiating element 1 can be equivalent to parallel capacitance, so that the resonant frequency of the antenna assembly 100 is reduced, and the purpose of miniaturization of the antenna assembly 100 is achieved. Alternatively, the size of the antenna assembly 100 may be adjusted by adjusting the degree of coupling between the short-circuit patch and the radiating element 1, the stronger the coupling, the greater the degree of miniaturization of the antenna assembly 100. The weight of the antenna assembly 100 may be further reduced due to the miniaturization of the antenna assembly 100.

In some embodiments, the antenna assembly 100 includes a feed unit 2, a feed probe 22, the feed unit 2 being disposed on the first dielectric substrate 19, the feed probe 22 being disposed between the first dielectric substrate 19 and the second dielectric substrate 21; the feeding unit 2 includes a first feeding unit 2 and a second feeding unit 2, the first feeding unit 2 and the second feeding unit 2 being connected to the feeding probe 22; the first feeding unit 2 and the second feeding unit 2 extend distally from the feeding probe 22; the extending direction of the first power feeding unit 2 and the extending direction of the second power feeding unit 2 have an included angle which is not zero. Alternatively, the feed probe 22 may be a metallic material.

The polarization of an antenna is defined as the polarization of an electromagnetic wave of the antenna in the maximum radiation direction, i.e., the trajectory described by the change over time of the end of the electric field vector at a certain fixed position in the far field region space in the maximum radiation direction of the antenna. The track, if straight, circular or elliptical, is referred to as linear, circular or elliptical. The linear polarization antenna has simple structure and easy realization, but is also easiest to receive interference, and the attenuation is larger when being applied to the mobile terminal. The advantage of circular polarization is that if the incident wave is a right-hand circular polarized wave, the reflected wave is a left-hand circular polarized wave, and the left-hand and right-hand circular polarized waves do not interfere with each other. Alternatively, for better receiving signals, the antenna assembly 100 may be designed as a circularly polarized antenna, and the circularly polarized radiation characteristic of the antenna assembly 100 is achieved through the designs of the radiating element 1, the dielectric substrate, the feeding mode, and the like.

Optionally, the first feeding unit 2 is different in size from the second feeding unit 2; the extending direction of the first power feeding unit 2 is in an orthogonal relationship with the extending direction of the second power feeding unit 2.

The first feed branch is used for a first mode of the excitation radiating element 1 and the second feed branch is used for a second mode of the excitation radiating element 1, the first mode being equal in amplitude, orthogonal and 90 ° out of phase with the second mode.

Optionally, the first feeding unit 2 comprises a first feeding branch and the second feeding unit 2 comprises a second feeding branch, the first feeding branch being used for a first mode of the excitation radiating unit 1, the second feeding branch being used for a second mode of the excitation radiating unit 1, the first mode being equal in amplitude, orthogonal and 90 ° out of phase with the second mode.

Optionally, the first feeding branch and the second feeding branch form a double-T-shaped branch for feeding the antenna assembly 100, and a certain distance exists between each T-shaped branch and the radiating element 1, so that no metal contact exists. By means of two orthogonally placed T-shaped feed branches of different lengths, two modes of equal amplitude, orthogonal and 90 deg. out of phase of the radiating element 1 of the antenna assembly 100 are excited, the circular polarization of the antenna assembly 100 being produced.

Optionally, in order to increase the coupling, double T-shaped feeding stubs are printed on both the upper and lower surfaces of the first dielectric substrate 19, and their horizontal positions are the same. Alternatively, the double-T-shaped feed stub may be printed only on the upper surface or the lower surface of the first dielectric substrate 19 under the condition that the coupling between the double-T-shaped feed stub and the radiating element 1 satisfies the requirement.

Alternatively, in the case where the coupling condition between the radiating element 1 and the feeding element 2 is satisfied, the T-shaped feeding stub may take other shapes of feeding stubs, such as a circular arc shape, a sector shape, etc., which is not limited by the embodiment of the present utility model.

In some embodiments, the antenna assembly 100 includes a parasitic element 20 disposed on a second dielectric substrate 21, the parasitic element 20 being of a closed configuration; the parasitic element 20 is disposed along an edge of the second dielectric substrate 21, and the parasitic element 20 includes a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are disposed facing away from each other.

The parasitic element 20 may be used to suppress the backward radiation of the radiating element 1 of the antenna assembly 100 to enhance the front-to-back ratio of the antenna assembly 100. Where the front-to-back ratio is defined as the ratio of the maximum radiation direction (forward) level of the antenna assembly 100 to its opposite direction (backward) level. Optionally, there is an electromagnetic coupling between the parasitic element 20 and the ground element 25, without direct metallic contact with each other.

Optionally, the second dielectric substrate 21 includes a first surface and a second surface opposite to each other, and the parasitic element 20 is disposed on the first surface or the second surface of the second dielectric substrate 21. The shape of the location of the parasitic element 20 may be appropriately adjusted according to practical application requirements, for example, the parasitic element 20 may be located in the middle of the dielectric substrate or on the upper and lower surfaces of the dielectric substrate. Alternatively, the parasitic element 20 may be a head-to-tail configuration, such as a loop. Optionally, the parasitic element 20 includes an even number of recesses.

After the miniaturization of the antenna assembly 100 is satisfied, the ground assembly 25 is also miniaturized, and thus, the radiation direction of the antenna assembly 100 is downward (backward) and the front and rear of the antenna assembly 100 are poor without adding the parasitic element 20; with the parasitic element 20 added, the radiation direction of the antenna assembly 100 is upward (forward), and the front and rear of the antenna assembly 100 are better. The specific working principle is as follows: similar to a yagi antenna, the radiation generated by the parasitic element 20 has a certain phase difference with the radiation generated by the radiating element 1, so that the radiation generated by the radiating element 1 is superimposed forward and offset backward, thereby realizing improvement of the front-to-back ratio. Alternatively, the parasitic element 20 may be further configured in a closed structure, such as a ring, and arranged in a serpentine-like manner by a plurality of different recesses, so as to achieve miniaturization, with an equivalent side length of about 1/4 of the resonant wavelength.

In some embodiments, antenna assembly 100 includes a ground assembly 25, ground assembly 25 including a first ground and a second ground; the second dielectric substrate 21 includes a first face and a second face opposite to each other; the first grounding piece is arranged on the first surface, the first grounding piece is used for grounding the antenna assembly 100, the second grounding piece is arranged on the second surface, and the second grounding piece is used for simulating the grounding of an active circuit; the first ground member and the second ground member are short-circuited by a plurality of via holes 23.

Alternatively, in testing the performance of the antenna assembly 100 in a mobile terminal, the rigid coaxial feed antenna may be used instead of the original mobile terminal antenna, and the coaxial feed antenna may be used to facilitate testing the performance of the antenna assembly 100 in a darkroom.

Optionally, the antenna assembly 100 further comprises a feed port, a feed unit 2, a feed probe 22; the second dielectric substrate 21 is provided with a grounding component 25, the feed port comprises an outer conductor and an inner conductor, the grounding component 25 is connected with the outer conductor, the first end of the metal probe is connected with the inner conductor, and the second end of the feed probe 22 is connected with the feed unit 2; the antenna assembly 100 transmits signals to the receiving circuit of the antenna assembly 100 through a transmission line connected to a feed port.

Alternatively, the feed probe 22 may be a metal probe of a metal material. The feed probe 22 is concentric with the circular hole on the grounding assembly 25, and the diameter of the probe is smaller than that of the circular hole, so that short circuit with the floor is avoided. Alternatively, the feed probe 22 is simultaneously connected to the feed unit 2, e.g., a double T-shaped feed stub, on the upper and lower surfaces of the first dielectric substrate 19, and the antenna assembly 100 transmits signals to the receiving circuit through a transmission line connected to the feed port. Alternatively, the antenna assembly 100 is electrically connected to a receiving circuit, and the receiving circuit may be used to process electromagnetic wave signals received by the antenna assembly 100.

Optionally, the antenna assembly 100 comprises a radiating element 1, the radiating element 1 having a cross section below 0.03λ ₀ Wherein lambda is ₀ The lower profile for vacuum wavelengths reduces the space occupation of the antenna assembly 100 to some extent.

The present utility model provides a mobile terminal comprising an antenna assembly 100 according to any of the embodiments described above.

The mobile terminal is exemplified by an aircraft, and optionally, the antenna assembly 100 is mounted to the bottom of a receiving cavity in the fuselage of the aircraft. Alternatively, the antenna assembly 100 may also be provided on other structures of the aircraft such as a foot rest, a horn, etc.

In some embodiments, the mobile terminal may further include a circuit board. In practical application, the circuit board can also be a main control board of the mobile terminal, and the circuit board can also be arranged at different positions of the mobile terminal according to practical requirements. Optionally, the receiving circuit of the antenna assembly 100 is disposed on a circuit board, and the circuit board is further provided with other functional circuits besides the receiving circuit, which may be, for example, a graphic transmission control circuit. This can avoid the need for an additional dedicated circuit board to provide the receiving circuitry of the antenna assembly 100, further reducing the space occupied by the antenna assembly 100 on the mobile terminal.

In practical applications, in the case that the receiving circuit is disposed on the circuit board, the circuit board and the antenna assembly 100 may be connected through a coaxial line, so as to achieve electrical connection between the antenna assembly 100 and the receiving circuit. Specifically, one end of the coaxial line may be soldered to the antenna assembly 100, the other end of the coaxial line may be provided with a coaxial line connector, and by connecting the coaxial line connector at the other end of the coaxial line to the circuit board, electrical connection between the antenna assembly 100 and the receiving circuit on the circuit board may be achieved.

Referring to fig. 2 to 7, in some embodiments, the performance of the antenna assembly 100 may be adjusted by adjusting a plurality of parameters such as the shape and the size of the plurality of structures including the radiating unit 1, the feeding unit 2, the metal member 3, the parasitic unit 20, and the like of the antenna assembly 100, so that the flexibility of the layout of the antenna assembly 100 on the mobile terminal may be further improved. Alternatively, in order to further miniaturize and lighten the antenna assembly 100, methods of further shortening the size of the dielectric substrate, using an alternative lighter weight dielectric substrate, and the like may be employed. Since the adjustment of certain structural parameters may have a corresponding effect on other structures, the parameters corresponding to the above structures need to be adjusted comprehensively in order to ensure the overall performance of the antenna assembly 100.

Referring to fig. 3, fig. 3 is a schematic structural diagram of another antenna assembly 100 according to an embodiment of the utility model. In comparison with the antenna assembly 100 shown in fig. 2, the feeding unit 2 in the middle part of the antenna assembly 100 is configured by a double-T-shaped feeding branch shape into two triangles with different sizes. Optionally, the protruding portion 15 of the radiating element 1 of the antenna assembly 100, such as a tuning stub, is arranged in an inwardly bent structure, which is more advantageous for miniaturization of the antenna assembly 100, and other structures and positions of the antenna assembly 100 remain unchanged.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an antenna assembly 100 according to another embodiment of the present utility model. In comparison with the antenna assembly 100 shown in fig. 2, in which the protruding portion 15 of the radiating element 1 of the antenna assembly 100 is shaped like a tuning stub, which is arranged to grow outwards from the middle of the second part in the main body part of the radiating element 1, other structures and positions of the antenna assembly 100 remain unchanged, and the tuning stub at this time can also play a role in tuning.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another antenna assembly 100 according to an embodiment of the utility model. In comparison with the antenna assembly 100 shown in fig. 2, in which the protruding portion 15 of the radiating element 1 of the antenna assembly 100 is shaped like a tuning stub, and is arranged to extend outwards from the first portion of the main body portion of the radiating element 1 of the antenna assembly 100, other structures and positions of the antenna assembly 100 remain unchanged, and the tuning stub at this time can also play a role in tuning.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another antenna assembly 100 according to an embodiment of the utility model. In comparison with the antenna assembly 100 shown in fig. 2, in which the radiating element 1 is provided in a circular shape and is subjected to bending processing, the metal member 3 such as a short-circuit patch provided on the first dielectric substrate 19 is provided in a trapezoidal shape, and the first feeding element 2 and the second feeding element 2 in the feeding element 2 are both provided in a fan shape. In some embodiments, the ground assembly 25 and parasitic element 20 are configured in a circular shape, and in other embodiments, the square ground assembly 25 and square parasitic element 20 may be maintained unchanged, as may other structures and locations of the antenna assembly 100.

Referring to fig. 7, fig. 7 is a schematic structural diagram of another antenna assembly 100 according to an embodiment of the utility model. In comparison with the antenna assembly 100 shown in fig. 2, in which the parasitic element 20 is placed on the lower surface of the second dielectric substrate 21 and the recess of the parasitic element 20 is removed, the sizes of the parasitic element 20 and the ground assembly 25 need to be expanded to some extent because the equivalent length of the parasitic element 20 is shortened at this time.

Referring to fig. 8, an S-parameter result diagram of an antenna assembly 100 according to an embodiment of the present utility model is shown. As can be seen in fig. 8, the 6dB return loss of the antenna assembly 100 can cover both 1.561GHz and 1.575GHz frequency points. During actual processing and testing, the 6dB return loss bandwidth of the antenna assembly 100 is wider, and the coverage of three frequency points of 1.561GHz, 1.575GHz and 1.602GHz can be realized, so that the compatibility of the working frequency bands of different satellite navigation systems can be realized.

Referring to fig. 9, fig. 9 is a graph showing an axial ratio of the antenna assembly 100 according to the frequency variation according to the embodiment of the utility model. Referring to fig. 10, fig. 10 is a graph showing the axial ratio of the antenna assembly 100 according to the angle θ according to the embodiment of the present utility model. As can be seen from fig. 9, the 3dB axial ratio bandwidth of the antenna assembly 100 may reach 7MHz and the 6dB axial ratio bandwidth may reach 15MHz. As can be seen from fig. 10, the 3dB axial ratio bandwidth of the antenna assembly 100 may be up to 120 ° or more and the 6dB axial ratio bandwidth may be up to 150 ° or more.

Referring to fig. 11, fig. 11 shows three frequency point patterns of the antenna assembly 100 according to the embodiment of the present utility model, (a) 1.561GHz, (b) 1.575GHz, and (c) 1.602GHz. Fig. 11 (a) - (c) are respectively tangential patterns of the antenna assembly 100 at three frequency points, where it can be seen that the radiation patterns of the antenna assembly 100 can maintain a better front-to-back ratio. Wherein the front-back ratio of 1.561GHz can reach more than 7.4dBi, the 1.575GHz can reach 7.2dBi, and the 1.602GHz can reach 5.6dBi.

In some embodiments, the antenna assembly 100 is applied to mobile terminal navigational positioning. Alternatively, the antenna assembly 100 adopts a single feed mode, the feed unit 2 generates circular polarization by using double-T-shaped feed branches, the feed unit 2 and the radiation unit 1 are coupled for feeding, an additional phase shift network is not needed, and the space and the cost of the mobile terminal equipment can be greatly saved. Optionally, the radiating element 1 of the antenna assembly 100 adopts an enclosure structure, and the radiating element 1 is bent through a plurality of concave parts, and encloses the feeding unit 2 and the metal piece 3 on the dielectric substrate, such as a short-circuit patch, where the short-circuit patch is connected with the grounding assembly 25 through the metal part 7 in the supporting assembly, such as a short-circuit pin, and the parallel capacitance effect generated by electromagnetic coupling between the short-circuit patch and the radiating element 1 is utilized, so that the resonant frequency of the antenna assembly 100 is reduced, so that the antenna assembly 100 is miniaturized ideally, and the weight of the antenna assembly 100 is reduced accordingly. Optionally, the supporting component is arranged between the first dielectric substrate 19 and the second dielectric substrate 21, the inner side of the supporting component is the metal part 7 for electrically connecting the first dielectric substrate 19 and the second dielectric substrate 21, optionally, the metal part 7 adopts a short circuit pin, the outer side of the supporting component surrounding the metal part 7 adopts a non-metal part 11 made of nylon, and two ends of the non-metal part 11 are respectively abutted against the first dielectric substrate 19 and the second dielectric substrate 21 so as to provide stable supporting force, and meanwhile, the non-metal part 11 can also perform a certain isolation function on the metal part 7, so that a space for accommodating air media is formed between the two dielectric substrates. Optionally, the antenna assembly 100 includes a parasitic element 20. Optionally, the parasitic element 20 includes a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are disposed facing away from each other. The parasitic element 20 and the radiation of the radiation element 1 have a phase difference, so that the radiation of the radiation element 1 is overlapped in the forward direction and offset in the backward direction, and the antenna assembly 100 can obtain a preferable front-to-back ratio under the condition of miniaturization of the grounding assembly 25. The antenna assembly 100 has a lighter weight while ensuring otherwise identical or similar performance to a loaded high dielectric constant ceramic antenna. In the positioning system of the mobile terminal, the antenna assembly 100 has lighter weight and occupies smaller space, so that the performance of the mobile terminal can be improved to a certain extent, for example, the mobile terminal is exemplified by an aircraft, and the cruising ability of the aircraft can be further improved due to the reduction of the overall load of the aircraft.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of the present specification, references to the terms "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., mean that a particular method step, feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular method steps, features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present utility model is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present utility model, and these modifications and substitutions are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. An antenna assembly is characterized by comprising a first dielectric substrate, a second dielectric substrate and a supporting assembly which are arranged in parallel;

2. The antenna assembly of claim 1, wherein the support assembly comprises a plurality of support posts equidistant from a connection point of the first dielectric substrate to a feed center point of the first dielectric substrate.

3. The antenna assembly of claim 1, wherein the antenna assembly comprises a radiating element, a feed element;

the first dielectric substrate comprises a first surface and a second surface which are opposite to each other, the radiation unit is arranged on the first surface and used for receiving or transmitting electromagnetic wave signals, and the feed unit is arranged on the first surface and/or the second surface;

the feed unit is not directly connected with the radiation unit, and the feed unit is electromagnetically coupled with the radiation unit.

4. The antenna assembly of claim 1, wherein the antenna assembly comprises a radiating element and a feed element disposed on the first dielectric substrate;

the main body part of the radiation unit is of a full-surrounding structure, and the main body part surrounds the feed unit.

5. The antenna assembly of claim 4, wherein the body portion of the radiating element comprises a first portion, a second portion, and a third portion;

the first part of the radiation unit is arranged close to the edge of the first dielectric substrate, the second part of the radiation unit is arranged far away from the edge of the first dielectric substrate, the distance between the first part and the edge is consistent, the distance between the second part and the edge is consistent, and the first part and the second part are connected through the third part.

6. The antenna assembly of claim 4, wherein the radiating element further comprises a protrusion, a first end of the protrusion being connected to the body portion of the radiating element, a second end of the protrusion being open.

7. The antenna assembly of any one of claims 1-6, wherein the antenna assembly comprises a radiating element disposed on the first dielectric substrate;

the metal piece of the first dielectric substrate is not directly connected with the radiating unit, and the metal piece of the first dielectric substrate is electromagnetically coupled with the radiating unit.

8. The antenna assembly of any one of claims 1-6, wherein the antenna assembly comprises a feed unit disposed on the first dielectric substrate, a feed probe disposed between the first dielectric substrate and the second dielectric substrate;

the power supply unit comprises a first power supply unit and a second power supply unit, and the first power supply unit and the second power supply unit are connected with the power supply probe;

the first feeding unit and the second feeding unit extend to the far end from the connection part of the first feeding unit and the feeding probe;

an included angle which is different from zero is formed between the extending direction of the first power supply unit and the extending direction of the second power supply unit.

9. The antenna assembly of claim 8, wherein the first feed element is different in size than the second feed element;

the extending direction of the first power feeding unit is in an orthogonal relationship with the extending direction of the second power feeding unit.

10. The antenna assembly of any one of claims 1-6, wherein the antenna assembly comprises a parasitic element disposed on the second dielectric substrate, the parasitic element being of a closed configuration;

the parasitic element is arranged along the edge of the second dielectric substrate and comprises a plurality of first concave parts and a plurality of second concave parts, and the first concave parts and the second concave parts are arranged in a back direction.

11. The antenna assembly of any one of claims 1-6, wherein the antenna assembly comprises a ground assembly comprising a first ground and a second ground;

the second dielectric substrate comprises a first surface and a second surface which are opposite;

the first grounding piece is arranged on the first surface and used for grounding the antenna assembly, the second grounding piece is arranged on the second surface and used for simulating grounding of an active circuit;

the first grounding piece and the second grounding piece are connected in a short circuit mode through a plurality of through holes.

12. The antenna assembly according to any of claims 1-6, characterized in that the antenna assembly comprises a radiating element having a cross section below 0.03 λ ₀ Wherein lambda is ₀ Is a vacuum wavelength.

13. A mobile terminal, comprising:

the antenna assembly of any one of claims 1 to 12.