A high-precision positioning antenna and a dual-frequency high-precision positioning antenna

Abstract

The present invention belongs to the field of antenna technology and discloses a high-precision positioning antenna, comprising: an antenna substrate, a ground potential metal plate, and a feeder circuit. The antenna substrate includes a first surface and a second surface. The first surface is a metal surface connected to a signal source via a feeder circuit to simultaneously excite two mutually orthogonal current resonance modes on the first surface. The second surface is symmetrically provided with at least four metal pads, from which microstrip circuits extend for controlling the antenna's resonant frequency and matching its impedance. The ground potential metal plate extends at least four metal legs, each of which is welded to a corresponding metal pad on the second surface of the antenna substrate, generating electric field line reflections with the first surface. The present invention achieves miniaturization and lightweighting of the antenna while enhancing the antenna's upward radiation gain.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas in wireless communication transmission, in particular to a high-precision positioning antenna, and also to a dual-frequency high-precision positioning antenna. Background Art

[0002] High-precision satellite positioning antennas typically use ceramic as the dielectric material. The ceramic substrate has two surfaces. The front surface uses silver metal as the antenna, with the feed pins electrically connected to the antenna. The back surface is filled with silver metal and serves as the antenna's ground potential metal plate. The center of the ceramic substrate is hollowed out to allow the feed pins to pass through and connect to the signal source of the communication equipment.

[0003] The advantage of ceramic antennas lies in their low dielectric loss, enabling miniaturization while achieving high radiation gain, meeting the requirements for positioning accuracy and satellite communications. However, their disadvantages are that the sintering of ceramic materials severely pollutes the environment, resulting in high manufacturing costs and heavy weight, making them difficult to install in mobile devices. To address this issue, existing literature proposes replacing the ceramic dielectric with a capacitor, with metal legs extending from the antenna element and capacitors connected between the metal legs and the ground potential substrate. This approach reduces the manufacturing cost and weight of the antenna. However, the thermal loss of the capacitor is much greater than that of the ceramic dielectric, resulting in a significant reduction in the antenna's radiation gain. Furthermore, the capacitor concentrates electric field energy that would otherwise be reflected skyward, reducing the antenna's directivity and making it difficult to meet the requirements for satellite communications. Summary of the Invention

[0004] The embodiments of the present invention provide a high-precision positioning antenna and a dual-frequency high-precision positioning antenna to solve the problems of heavy weight, high manufacturing cost, and severe radiation gain attenuation in the ceramic antenna solution in the prior art.

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, the following is a brief summary. This summary is not intended to be a comprehensive review, identify key or essential elements, or delineate the scope of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the detailed description that follows.

[0006] According to a first aspect of an embodiment of the present invention, a high-precision positioning antenna is disclosed.

[0007] In one embodiment, the high-precision positioning antenna includes: an antenna substrate, a ground potential metal plate, and a feeder line; wherein,

[0008] The antenna substrate comprises a first surface and a second surface; the first surface is a metal surface connected to a signal source via a feeder line for simultaneously exciting two mutually orthogonal current resonance modes on the first surface; the second surface is symmetrically provided with at least four metal pads, from which microstrip lines extend for controlling the antenna's resonant frequency and matching its impedance;

[0009] At least four metal legs extend from the ground potential metal plate, and each metal leg is welded to a corresponding metal pad on the second surface of the antenna substrate to generate electric field line reflection with the first surface.

[0010] Optionally, the metal foot is a metal wire and has an L-shaped structure.

[0011] Optionally, the metal foot is a microstrip circuit on a PCB board and has an L-shaped structure.

[0012] Optionally, the metal pads are arranged at four diagonal corners, or four sides, or at both four diagonal corners and four sides of the second surface of the antenna substrate.

[0013] Optionally, a feeding slot is provided on the first surface, and an edge of the feeding slot is connected to a signal source via a feeding line.

[0014] Optionally, the ground potential metal plate is provided with a slot, and the slot is used for the feeding line to pass through to connect to a signal source.

[0015] According to a second aspect of an embodiment of the present invention, a dual-frequency high-precision positioning antenna is provided.

[0016] In one embodiment, the dual-frequency high-precision positioning antenna includes: a first antenna substrate, a first ground potential metal plate, a second antenna substrate, a second ground potential metal plate, and a feeder circuit; wherein,

[0017] The first antenna substrate and the first ground potential metal plate operate in a relatively high frequency band, the second antenna substrate and the second ground potential metal plate operate in a relatively low frequency band, and the first ground potential metal plate is adjacent to the second antenna substrate;

[0018] The first antenna substrate includes a first surface and a second surface; the first surface of the first antenna substrate is a metal surface connected to a signal source via a feed line for exciting two mutually orthogonal current resonance modes on the first surface of the first antenna substrate; at least four metal pads are symmetrically provided on the second surface of the first antenna substrate, and microstrip lines extend from the metal pads for controlling the antenna resonant frequency and matching the impedance;

[0019] At least four metal legs extend from the first ground potential metal plate, each metal leg being welded to a corresponding metal pad on the second surface of the first antenna substrate to generate electric field line reflection with the first surface of the first antenna substrate;

[0020] The second antenna substrate includes a first surface and a second surface; the first surface of the second antenna substrate is a metal surface, and two mutually orthogonal current resonance modes on the first surface of the first antenna substrate generate electromagnetic coupling, thereby exciting the two mutually orthogonal current resonance modes on the first surface of the second antenna substrate; at least four metal pads are symmetrically arranged on the second surface of the second antenna substrate, and microstrip lines extend from the metal pads to control the antenna resonance frequency and match the impedance;

[0021] At least four metal legs extend from the second ground potential metal plate. Each metal leg is correspondingly welded to a metal pad on the second surface of the second antenna substrate to generate electric field line reflection with the first surface of the second antenna substrate.

[0022] Optionally, the first ground potential metal plate, the second antenna substrate and the second ground potential metal plate are provided with slots so that the feeding line can pass through and connect to the signal source.

[0023] Optionally, the dual-frequency high-precision positioning antenna includes four feeding lines, two of which respectively excite two current resonance modes that are orthogonal to each other on the first surface metal surface of the first antenna substrate; and the other two respectively excite two current resonance modes that are orthogonal to each other on the first surface metal surface of the second antenna substrate.

[0024] Optionally, the two feeding lines for exciting the first surface of the first antenna substrate are located in a central area of ​​the second antenna substrate.

[0025] Optionally, a feeding slot is provided on the first surface of the first antenna substrate, and an edge of the feeding slot is connected to a signal source via a feeding line.

[0026] Optionally, the metal foot is a metal wire and has an L-shaped structure.

[0027] Optionally, the metal foot is a microstrip circuit on a PCB board and has an L-shaped structure.

[0028] Optionally, the metal pads are arranged at four diagonal corners, or four sides, or at both four diagonal corners and four sides of the second surface of the antenna substrate.

[0029] According to a third aspect of embodiments of the present invention, an electronic device is provided.

[0030] In one embodiment, the electronic device includes the high-precision positioning antenna or the dual-frequency high-precision positioning antenna described in any one of the above embodiments.

[0031] The technical solution provided by the embodiment of the present invention may have the following beneficial effects:

[0032] The present invention extends a metal structure from a ground potential metal plate, thereby enhancing the vertical electric field line density between the ground potential metal plate and the antenna without changing the magnetic field strength. At the same time, the L metal structure serves as a metal reflective surface, thereby enhancing the upward radiation gain of the antenna. At the same time, the present invention achieves miniaturization and lightweight of the antenna by changing the shape of the cavity.

[0033] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0035] Figure 1 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 1. Figure 1 ;

[0036] Figure 2 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 1. Figure 2 ;

[0037] Figure 3 is a schematic diagram of the first surface structure of the antenna substrate in Example 1;

[0038] Figure 4 is a schematic diagram of the second surface structure of the antenna substrate in Example 1;

[0039] Figure 5 It is a schematic diagram of the L-shaped metal foot structure;

[0040] Figure 6 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 2. Figure 1 ;

[0041] Figure 7 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 2. Figure 2 ;

[0042] Figure 8 is a schematic diagram of the first surface structure of the antenna substrate in Example 2;

[0043] Figure 9 is a schematic diagram of the second surface structure of the antenna substrate in Example 2;

[0044] Figure 10 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 3. Figure 1 ;

[0045] Figure 11 This is a schematic diagram of the structure of the high-precision positioning antenna in Example 3. Figure 2 ;

[0046] Figure 12 is a schematic diagram of the first surface structure of the antenna substrate in Example 3;

[0047] Figure 13 is a schematic diagram of the second surface structure of the antenna substrate in Example 3;

[0048] Figure 14 This is a schematic diagram of the dual-frequency high-precision positioning antenna structure in Example 4.

[0049] In the picture:

[0050] 1. Antenna substrate; 101. First surface; 1011. Feed slot; 102. Second surface; 2. Ground potential metal plate; 201. Slot; 3. Feed line; 4. Metal pad; 5. Metal foot; 6. First antenna substrate; 7. First ground potential metal plate; 8. Second antenna substrate; 9. Second ground potential metal plate. DETAILED DESCRIPTION

[0051] The following description and accompanying drawings sufficiently illustrate the specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, including all available equivalents thereof. Herein, the terms "first," "second," and the like are used solely to distinguish one element from another and do not require or imply any actual relationship or order between these elements. In practice, the first element can also be referred to as the second element, and vice versa. Furthermore, the terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a structure, device, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such structure, device, or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the structure, device, or apparatus comprising the element. The various embodiments herein are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Similar or identical parts between the various embodiments can be referenced to each other.

[0052] The terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like in this document indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, they can be mechanical or electrical connections, or they can be internal connections between two elements. They can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] As used herein, unless otherwise specified, the term "plurality" means two or more.

[0054] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0055] In this article, the term "and / or" is used to describe the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0056] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0057] Traditional methods rely on increasing the distance between antennas to achieve high isolation, making it difficult to integrate more antenna devices into wireless devices. Embodiments of the present invention disclose a dual-antenna structure with high isolation. This high isolation is achieved through the structure of the ground plane, the configuration of the clearance area, and the positioning of the grounding points of the two antennas.

[0058] Example 1

[0059] like Figure 1-4As shown, this embodiment discloses a high-precision positioning antenna, including an antenna substrate 1, a ground potential metal plate 2, and a feed line 3, wherein the antenna substrate 1 includes a first surface 101 and a second surface 102, the first surface 101 is a metal surface, and the metal surface is connected to the signal source through the feed line 3, which is used to simultaneously excite two mutually orthogonal current resonance modes on the first surface; four metal pads 4 are provided on the second surface 102, and the four metal pads 4 are respectively provided in the middle of the side of the second surface 102, and microstrip lines extend from the metal pads for controlling the antenna resonant frequency and matching the impedance, and four metal feet 5 extend from the ground potential metal plate 2, and the four metal feet 5 are respectively provided in the middle of the side of the ground potential metal plate surface, and each metal foot 5 is welded to the metal pad 4 on the second surface 102 of the antenna substrate 1, generating electric field line reflection with the first surface 101.

[0060] In this embodiment, the metal pads 4 on two opposite sides may be symmetrically arranged, and the metal feet 5 on two opposite sides may be symmetrically arranged.

[0061] Under the conditions of the above embodiments, the structure of the antenna can be adjusted accordingly according to specific design requirements. For example, the specific shapes and structures of the antenna substrate 1, the ground potential metal plate 2, the first surface 101, the second surface 102, the metal pad 4, and the L-shaped metal foot 5, as well as the routing form of the feed line 3 and the feeding method can adopt different forms to achieve different antenna designs for impedance matching, frequency modulation, structural optimization and other requirements.

[0062] In this embodiment, for the metal foot 5, Figure 5 As shown, the metal foot 5 can be designed into an L-shaped structure using metal conductors or PCB microstrip lines. To facilitate the routing of the feed line 3, a feed slot 1011 can be provided on the first surface 101, and a slot 201 can be provided on the ground potential metal plate 2. The edge of the feed slot 1011 is connected to the signal source of the communication device via the feed line 3 passing through the slot 201 (in actual application, the signal source can be located on a terminal mainboard of the communication device, etc.).

[0063] The feeding slot 1011 can be designed as a rectangular structure, and the slot 201 can be designed as a circular structure. Both the feeding slot 1011 and the slot 201 can be adjusted to the corresponding shape according to the actual design size of the antenna, and only need to meet the connection routing of the feeding line 3.

[0064] Example 2

[0065] like Figure 6-9As shown, this embodiment discloses a high-precision positioning antenna, including an antenna substrate 1, a ground potential metal plate 2, and a feed line 3, wherein the antenna substrate 1 includes a first surface 101 and a second surface 102, the first surface 101 is a metal surface, and the metal surface is connected to the signal source through the feed line 3, which is used to simultaneously excite two mutually orthogonal current resonance modes on the first surface; four metal pads 4 are provided on the second surface 102, and the four metal pads 4 are respectively provided at the diagonals of the second surface 102, and microstrip lines extend from the metal pads for controlling the antenna resonant frequency and matching the impedance, four metal feet 5 extend from the ground potential metal plate 2, and the four metal feet 5 are respectively provided at the diagonals of the side edges of the ground potential metal plate surface, each metal foot 5 is correspondingly welded to the metal pad 4 on the second surface 102 of the antenna substrate 1, and generates electric field line reflection with the first surface 101.

[0066] Under the conditions of the above embodiments, the structure of the antenna can be adjusted accordingly according to specific design requirements. For example, the specific shapes and structures of the antenna substrate 1, the ground potential metal plate 2, the first surface 101, the second surface 102, the metal pad 4, and the L-shaped metal foot 5, as well as the routing form of the feed line 3 and the feeding method can adopt different forms to achieve different antenna designs for impedance matching, frequency modulation, structural optimization and other requirements.

[0067] In this embodiment, for the metal foot 5, Figure 5 As shown, the metal foot 5 can be designed into an L-shaped structure using metal conductors or PCB microstrip lines. To facilitate the routing of the feed line 3, a feed slot 1011 can be provided on the first surface 101, and a slot 201 can be provided on the ground potential metal plate 2. The edge of the feed slot 1011 is connected to the signal source of the communication device via the feed line 3 passing through the slot 201 (in actual application, the signal source can be located on a terminal mainboard of the communication device, etc.).

[0068] The feeding slot 1011 can be designed as a rectangular structure, and the slot 201 can be designed as a circular structure. Both the feeding slot 1011 and the slot 201 can be adjusted to the corresponding shape according to the actual design size of the antenna, and only need to meet the connection routing of the feeding line 3.

[0069] Example 3

[0070] like Figure 10-13As shown, this embodiment discloses a high-precision positioning antenna, including an antenna substrate 1, a ground potential metal plate 2, and a feed line 3, wherein the antenna substrate 1 includes a first surface 101 and a second surface 102, the first surface 101 is a metal surface, and the metal surface is connected to a signal source through a feed line 3, so as to simultaneously excite two mutually orthogonal current resonance modes on the first surface; the second surface 102 is provided with 8 metal pads 4, and the 8 metal pads 4 are respectively arranged in the middle of the side edge and at the diagonal position of the second surface 102, and a microstrip line extends from the metal pads 4 for controlling the antenna resonant frequency and matching the impedance, and 8 metal feet 5 extend from the ground potential metal plate 2, and the 8 metal feet 5 are respectively arranged in the middle of the side edge and at the diagonal position of the ground potential metal plate surface, and each metal foot 5 is welded to the metal pad 4 on the second surface 102 of the antenna substrate 1 accordingly, generating electric field line reflection with the first surface 101.

[0071] In this embodiment, the metal pads 4 on two opposite sides may be symmetrically arranged, and the metal feet 5 on two opposite sides may be symmetrically arranged.

[0072] Under the conditions of the above embodiments, the structure of the antenna can be adjusted accordingly according to specific design requirements. For example, the specific shapes and structures of the antenna substrate 1, the ground potential metal plate 2, the first surface 101, the second surface 102, the metal pad 4, and the L-shaped metal foot 5, as well as the routing form of the feed line 3 and the feeding method can adopt different forms to achieve different antenna designs for impedance matching, frequency modulation, structural optimization and other requirements.

[0073] In this embodiment, for the metal foot 5, Figure 5 As shown, the metal foot 5 can be designed into an L-shaped structure using metal conductors or PCB microstrip lines. To facilitate the routing of the feed line 3, a feed slot 1011 can be provided on the first surface 101, and a slot 201 can be provided on the ground potential metal plate 2. The edge of the feed slot 1011 is connected to the signal source of the communication device via the feed line 3 passing through the slot 201 (in actual application, the signal source can be located on a terminal mainboard of the communication device, etc.).

[0074] The feeding slot 1011 can be designed as a rectangular structure, and the slot 201 can be designed as a circular structure. Both the feeding slot 1011 and the slot 201 can be adjusted to the corresponding shape according to the actual design size of the antenna, and only need to meet the connection routing of the feeding line 3.

[0075] Example 4

[0076] like Figure 14As shown, this embodiment discloses a dual-frequency high-precision positioning antenna, comprising: a first antenna substrate 6, a first ground potential metal plate 7, a second antenna substrate 8, a second ground potential metal plate 9, and a feeder line 3; wherein the first antenna substrate 6 and the first ground potential metal plate 7 operate in a higher frequency band, the second antenna substrate 8 and the second ground potential metal plate 9 operate in a lower frequency band, and the first ground potential metal plate 8 is adjacent to the second antenna substrate 8;

[0077] The first antenna substrate 6 includes a first surface 101 and a second surface 102. The first surface 101 of the first antenna substrate 6 is a metal surface connected to a signal source via a feed line 3 for exciting two mutually orthogonal current resonance modes on the first surface of the first antenna substrate. The second surface 102 of the first antenna substrate 6 is symmetrically arranged with eight metal pads, with the eight metal pads 4 being arranged at the middle of the sides and at diagonal positions of the second surface 102. Microstrip lines extend from the metal pads 4 for controlling the antenna resonant frequency and matching the impedance.

[0078] Eight metal legs 5 extend from the first ground potential metal plate 7. The eight metal legs 5 are respectively arranged at the middle and diagonal positions of the side edges of the first ground potential metal plate 7. Each metal leg 5 is welded to a corresponding metal pad 4 on the second surface 102 of the first antenna substrate 6, generating electric field line reflections with the first surface 101 of the first antenna substrate 6.

[0079] The second antenna substrate 8 includes a first surface 101 and a second surface 102. The first surface 101 of the second antenna substrate 9 is a metal surface. Two mutually orthogonal current resonance modes on the first surface 101 of the first antenna substrate 6 generate electromagnetic coupling, thereby exciting two mutually orthogonal current resonance modes on the first surface 101 of the second antenna substrate 8. Eight metal pads 4 are symmetrically arranged on the second surface 102 of the second antenna substrate 8. The eight metal pads 4 are respectively arranged at the middle of the side edges and at diagonal positions of the second surface 102. Microstrip lines extend from the metal pads 4 to control the antenna resonant frequency and match the impedance.

[0080] Eight metal legs 5 extend from the second ground potential metal plate 9. The eight metal legs 5 are respectively arranged in the middle and diagonal positions of the side edges of the second ground potential metal plate 9. Each metal leg 5 is welded to a corresponding metal pad 4 on the second surface 102 of the second antenna substrate 8, generating electric field line reflection with the first surface 101 of the second antenna substrate 8.

[0081] In this embodiment, a feed slot 1011 is provided on the first surface 101 of the first antenna substrate 6. The edge of the feed slot 1011 is connected to a signal source via a feed line 3. Slots 201 are provided on the first ground potential metal plate 7, the second antenna substrate 8, and the second ground potential metal plate 9 to allow the feed line 3 to pass through and connect to the signal source. For a dual-frequency high-precision positioning antenna, four feed lines 3 can be provided. Two of these excite two mutually orthogonal current resonance modes on the first surface 101 of the first antenna substrate 6, while the other two excite two mutually orthogonal current resonance modes on the first surface 101 of the second antenna substrate 8. The two feed lines 3 that excite the first surface 101 of the first antenna substrate 6 are located in the center of the second antenna substrate 8.

[0082] For the above-mentioned embodiments 1, 2, and 3, in actual application, the length of the feed slot 1011 on the metal surface is less than 1 / 16 of a wavelength and is closed, that is, a slot cannot be opened from the edge of the metal plate. The signal feed line 3 is electrically connected at the edge of the feed slot 1011. The length of the feed slot 1011 determines the inductance of the current around the feed slot 1011. The induced voltage generated by the feed slot 1011 can control the electric field strength of two mutually orthogonal current resonance modes on the metal surface, ultimately making the electric field strength of the two modes equal. After the feed line 3 is connected, a circular current is generated around the feed slot 1011. After the circular current generates an induced voltage, even with only one feed line, it can simultaneously excite two mutually perpendicular inherent resonance modes on the metal plate, respectively called Ex and Ey. These two modes can simultaneously transmit and receive satellite signals.

[0083] Assume that there is no metal foot 5 between the antenna substrate 1 and the ground potential metal plate 2, which is the initial cavity state. The resonant frequency is set to Fo. At the initial frequency, the edge of the antenna substrate 1 is the location where charge accumulates. The metal foot 5 extending from the ground potential metal plate 2 enhances the electric field line density between it and the antenna substrate 1. At the same time, the metal foot 5 does not affect the magnetic flux of the initial cavity, which changes the initial resonant frequency of the cavity, as shown in the following formula:

[0084]

[0085] Where Fo is the original cavity resonant frequency; F is the cavity's changed resonant frequency; Wm is the cavity's stored magnetic field capacity; We is the cavity's stored electric field energy. Δ represents the change.

[0086] When the change in the electric field energy of the cavity is greater than the change in the magnetic field energy, the resonant frequency changes, thereby achieving the same effect of miniaturizing the antenna as ceramic dielectric.

[0087] When eight metal pads 4 are provided on the second surface 102 of the antenna, the electric field lines between the metal foot 5 and the antenna substrate 1 are more evenly distributed, thereby reducing the dielectric loss generated between the metal foot 5 and the antenna substrate 1 medium when the electric field lines are concentratedly distributed, thereby enhancing the radiation gain of the antenna. The formula for determining the degree of reduction in dielectric loss is as follows.

[0088]

[0089] Where Ploss represents the total dielectric loss, P1 represents the loss of the first metal pad, and P8 represents the loss of the eighth metal pad. As can be seen from the formula, connecting more metal pads in parallel can reduce the total dielectric loss.

[0090] In practical applications of the aforementioned fourth embodiment, one antenna of the dual-band high-precision positioning antenna (e.g., the antenna formed by the first antenna substrate 6 and the first ground metal plate 7 in the fourth embodiment) operates at a higher frequency, while the other antenna (e.g., the antenna formed by the second antenna substrate 8 and the second ground metal plate 9 in the fourth embodiment) operates at a lower frequency. During operation, the signal feed line 3 is no longer electrically connected to the edge of the feed slot 101 of the second antenna substrate 8. Instead, it passes through the feed slot 101 and then electrically connects to the edge of the feed slot 101 of the first antenna substrate 6.

[0091] The position of the antenna high-frequency feed line cannot be set at the center of the metal plate high frequency (that is, the two feed lines 3 that excite the first surface 101 of the first antenna substrate 6 are offset from the center of the first surface 101 of the first antenna substrate 6, but are in the central area of ​​the second antenna substrate 8), because this is the position where the magnetic field is strongest when the antenna high-frequency resonates, and it is impossible to effectively couple the antenna high-frequency Ex and Ey. It should be set at a position off-center, and the high-frequency resonance of the antenna can be excited by changing the capacitance value of the metal foot 5. For example, the capacitance value close to the feed line 3 should be greater than the capacitance value far from the feed line, so that the magnetic field at the feed line position is weakened, thereby exciting high-frequency resonance.

[0092] In the above embodiment, the positions of the metal legs 5 of the low-frequency and high-frequency antennas are uniquely on the same central axis. In other words, the positions of the metal legs 5 of the low-frequency and high-frequency antennas are correspondingly overlapped. However, in actual applications, in order to better solve the isolation between the two antennas, the positions of the metal legs 5 of the low-frequency and high-frequency antennas can also be set to non-overlapping styles. For example, if the four metal legs 5 of the low-frequency antenna are set on the two diagonals of the metal plate, then the four metal legs of the high-frequency antenna should be set in the middle of the four sides of the metal plate, so that the Ex and Ey of the lower frequency band can maintain a perpendicular relationship with the Ex and Ey of the higher frequency band as much as possible. The dual-frequency high-precision positioning antenna generates antenna resonance in the two frequency bands of 1170MHz and 1575MHz. The isolation between the two antenna resonances is less than 20dB, ensuring that the two antennas do not interfere with each other.

[0093] In other optional embodiments, the present invention further provides an electronic device comprising the high-precision positioning antenna or dual-band high-precision positioning antenna described in any of the above optional embodiments. For example, the electronic device is a router, a network box, a set-top box, a wireless access point, a vehicle-mounted station, or a drone.

[0094] The present invention is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A high-precision positioning antenna, characterized in that: include: Antenna substrate, ground potential metal plate, and feeding line; wherein, The antenna substrate includes a first surface and a second surface; the first surface is a metal surface connected to a signal source via a feeder line for simultaneously exciting two mutually orthogonal current resonance modes on the first surface; the second surface is symmetrically provided with at least eight metal pads, the eight metal pads being respectively provided at the middle of the side edges and at diagonal positions of the second surface, and microstrip lines extending from the metal pads for controlling the antenna resonant frequency and matching the impedance; At least eight metal legs extend from the ground potential metal plate, each metal leg being welded to a corresponding metal pad on the second surface of the antenna substrate to generate electric field line reflection with the first surface; Wherein, the metal foot is a metal conductor or a PCB board microstrip circuit.

2. A high-precision positioning antenna according to claim 1, characterized in that: The metal foot is in an L-shaped structure.

3. The high-precision positioning antenna according to claim 1, characterized in that: A feeding slot is provided on the first surface, and an edge of the feeding slot is connected to a signal source via a feeding line.

4. The high-precision positioning antenna according to claim 1, wherein: The ground potential metal plate is provided with a slot, and the slot is used for the feeding line to pass through so as to connect to a signal source.

5. A dual-frequency high-precision positioning antenna, characterized in that: It includes a first antenna substrate, a first ground potential metal plate, a second antenna substrate, a second ground potential metal plate, and a feeder circuit; wherein, The first antenna substrate and the first ground potential metal plate operate in a relatively high frequency band, the second antenna substrate and the second ground potential metal plate operate in a relatively low frequency band, and the first ground potential metal plate is adjacent to the second antenna substrate; The first antenna substrate includes a first surface and a second surface; the first surface of the first antenna substrate is a metal surface connected to a signal source via a feeder line for exciting two mutually orthogonal current resonance modes on the first surface of the first antenna substrate; at least eight metal pads are symmetrically arranged on the second surface of the first antenna substrate, the eight metal pads being respectively arranged at the middle of a side edge and at a diagonal position of the second surface of the first antenna substrate, and microstrip lines extending from the metal pads for controlling the antenna resonant frequency and matching the impedance; At least eight metal legs extend from the first ground potential metal plate, each metal leg being welded to a corresponding metal pad on the second surface of the first antenna substrate to generate electric field line reflection with the first surface of the first antenna substrate; The second antenna substrate includes a first surface and a second surface; the first surface of the second antenna substrate is a metal surface, and two mutually orthogonal current resonance modes on the first surface of the first antenna substrate generate electromagnetic coupling, thereby exciting the two mutually orthogonal current resonance modes on the first surface of the second antenna substrate; at least eight metal pads are symmetrically arranged on the second surface of the second antenna substrate, and the eight metal pads are respectively arranged at the middle of the side edges and at diagonal positions of the second surface of the second antenna substrate, and microstrip lines extend from the metal pads for controlling the antenna resonance frequency and matching the impedance; At least eight metal legs extend from the second ground potential metal plate, each metal leg being welded to a corresponding metal pad on the second surface of the second antenna substrate to generate electric field line reflection with the first surface of the second antenna substrate; Wherein, the metal foot is a metal conductor or a PCB board microstrip circuit.

6. The dual-frequency high-precision positioning antenna according to claim 5, characterized in that: The first ground potential metal plate, the second antenna substrate and the second ground potential metal plate are provided with slots so that the feeding line can pass through and connect to the signal source.

7. The dual-frequency high-precision positioning antenna according to claim 5, characterized in that: It comprises four feeding lines, two of which respectively excite two mutually orthogonal current resonance modes of the first surface metal surface of the first antenna substrate; the other two respectively excite two mutually orthogonal current resonance modes of the first surface metal surface of the second antenna substrate.

8. The dual-frequency high-precision positioning antenna according to claim 7, characterized in that: The two feeding lines for exciting the first surface of the first antenna substrate are located in the central area of ​​the second antenna substrate.

9. The dual-frequency high-precision positioning antenna according to claim 5, characterized in that: A feeding slot is provided on the first surface of the first antenna substrate, and an edge of the feeding slot is connected to a signal source through a feeding line.

Images