Magnetic receiving antenna and vehicle

Abstract

The invention provides a magnetic receiving antenna and a vehicle, and relates to the technical field of vehicles, and the magnetic receiving antenna comprises a composite magnetic core, a first installation part and a second installation part. The composite magnetic core comprises a plurality of ferrite sheets which are sequentially stacked along a first direction; in the first direction, the first installation piece is arranged at one end of each ferrite piece, the second installation piece is arranged at the other end of each ferrite piece, and the first installation piece and the second installation piece are matched to clamp the ferrite pieces. The plurality of ferrite sheets which are sequentially stacked along the first direction form the composite magnetic core, and the composite magnetic core structure can increase the effective magnetic flux area in a limited volume, enhance the magnetic field collection capability, improve the signal-to-noise ratio and improve the performance of the magnetic receiving antenna.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a magnetic receiving antenna and a vehicle. Background Technology

[0002] Domestic regulations for car radios require that, in the event of an emergency, the public be able to receive authoritative information via in-vehicle broadcasting to improve emergency response efficiency. Therefore, car radios have become an essential component of every vehicle, and their performance is a crucial indicator in the overall vehicle performance evaluation.

[0003] In existing technology, car radios use ferrite rods as magnetic receiving antennas. The sensitivity of a ferrite rod is directly proportional to its effective cross-sectional area and length.

[0004] However, car radios need to be integrated into the vehicle environment, and the size of a car radio is limited. This means that the effective cross-sectional area and length of the ferrite rod cannot be set to a large value, and the sensitivity of the ferrite rod cannot be improved to a good level, resulting in poor performance of the car radio. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic receiving antenna to solve the technical problem of poor performance of existing car radios.

[0006] The magnetic receiving antenna provided by the present invention includes a composite magnetic core, a first mounting component, and a second mounting component; The composite magnetic core comprises a plurality of ferrite sheets stacked sequentially along a first direction; Along a first direction, the first mounting member is disposed at one end of the plurality of ferrite sheets, and the second mounting member is disposed at the other end of the plurality of ferrite sheets. The first mounting member and the second mounting member cooperate to clamp the plurality of ferrite sheets.

[0007] Furthermore, the first mounting component is bonded to one end of the plurality of ferrite sheets by thermally conductive adhesive; the second mounting component is bonded to the other end of the plurality of ferrite sheets by thermally conductive adhesive.

[0008] Furthermore, the extension directions of the plurality of ferrite sheets are all arranged in parallel.

[0009] Furthermore, the extension directions of two adjacent ferrite sheets are arranged perpendicularly.

[0010] Furthermore, the composite magnetic core is wound with coils in at least two winding directions.

[0011] Furthermore, the magnetic receiving antenna also includes a main receiving coil; The main receiving coil includes a magnetic core body and multiple sets of Litz wires; the magnetic core body is mounted on the second mounting component. The magnetic core body is ring-shaped, and multiple sets of Litz wires are wound around the magnetic core body, with the multiple sets of Litz wires spaced apart along the circumference of the magnetic core body.

[0012] Furthermore, the magnetic receiving antenna also includes an auxiliary tuning coil; The auxiliary tuning coil is disposed on the end face of the first mounting member away from the composite magnetic core; one end of the auxiliary tuning coil passes through the first mounting member and is connected to the coil wound on the composite magnetic core.

[0013] Furthermore, the magnetic receiving antenna also includes a circuit board; The circuit board is positioned above the auxiliary tuning coil; The coil wound on the composite magnetic core, the main receiving coil, and the auxiliary tuning coil are all connected to the circuit board.

[0014] Furthermore, the magnetic receiving antenna also includes a shielding cover; The shielding cover is disposed on top of the magnetic receiving antenna; the top surface of the shielding cover has a slit structure; the shielding cover is an aluminum shielding cover.

[0015] Another objective of this invention is to provide a vehicle that includes the magnetic receiving antenna provided by this invention.

[0016] The magnetic receiving antenna provided by this invention includes a composite magnetic core, a first mounting member, and a second mounting member. The composite magnetic core comprises a plurality of ferrite sheets stacked sequentially along a first direction. Along the first direction, the first mounting member is disposed at one end of the plurality of ferrite sheets, and the second mounting member is disposed at the other end of the plurality of ferrite sheets. The first mounting member and the second mounting member cooperate to clamp the plurality of ferrite sheets. The plurality of ferrite sheets stacked sequentially along the first direction form a composite magnetic core. This composite magnetic core structure can increase the effective magnetic flux area within a limited volume. Compared with traditional magnetic rods, the effective permeability of the composite magnetic core in this embodiment is increased by 40%-60% within the same volume, which can enhance the magnetic field collection capability, improve the signal-to-noise ratio, and improve the performance of the magnetic receiving antenna. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the magnetic receiving antenna provided in an embodiment of the present invention; Figure 2 This is an exploded view of the composite magnetic core of the magnetic receiving antenna provided in an embodiment of the present invention (the extension directions of the multiple ferrite sheets are all arranged in parallel). Figure 3 This is a top view of the composite magnetic core of the magnetic receiving antenna provided in an embodiment of the present invention (the extension directions of two adjacent ferrite sheets are arranged perpendicularly). Figure 4 This is a schematic diagram of the winding direction of the coil of the composite magnetic core of the magnetic receiving antenna provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the magnetic core body of the magnetic receiving antenna provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the winding direction of the Litz wire in the magnetic core body of the magnetic receiving antenna provided in an embodiment of the present invention.

[0019] Icons: 1-Composite magnetic core; 11-Ferrite sheet; 12-Coil; 2-Auxiliary tuning coil; 3-Main receiving coil; 31-Magnetic core body; 32-Litz wire; 4-Shielding cover; 41-Gap structure; 5-Circuit board; 6-First mounting component; 7-Second mounting component. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a magnetic receiving antenna and a vehicle. Several embodiments are given below to describe the magnetic receiving antenna and vehicle provided by this invention in detail.

[0022] The magnetic receiving antenna provided in this embodiment, such as Figures 1 to 6 As shown, it includes a composite magnetic core 1, a first mounting member 6, and a second mounting member 7; the composite magnetic core 1 includes a plurality of ferrite sheets 11 stacked sequentially along a first direction; along the first direction, the first mounting member 6 is disposed at one end of the plurality of ferrite sheets 11, and the second mounting member 7 is disposed at the other end of the plurality of ferrite sheets 11, and the first mounting member 6 and the second mounting member 7 cooperate to clamp the plurality of ferrite sheets 11.

[0023] Multiple ferrite sheets 11 stacked sequentially along the first direction form a composite magnetic core 1. This structure of the composite magnetic core 1 can increase the effective magnetic flux area within a limited volume. Compared with traditional magnetic rods, the effective magnetic permeability of the composite magnetic core 1 in this embodiment is increased by 40%-60% in the same volume, which can enhance the magnetic field collection capability, improve the signal-to-noise ratio (SNR), and improve the performance of the magnetic receiving antenna.

[0024] The function of the composite magnetic core 1 is to broaden the efficient operating bandwidth of the magnetic receiving antenna, enabling it to maintain excellent performance in multiple different frequency bands (such as medium wave and short wave) simultaneously, or to achieve a flatter and more consistent response within a wide bandwidth. A single-material magnetic core cannot achieve optimal performance at both low and high frequencies simultaneously. The composite magnetic core 1, by physically combining two or more magnetic materials with different properties, combines cores suitable for different frequency bands, achieving complementary advantages. This optimizes the frequency response curve of the magnetic receiving antenna, resulting in a flatter gain within the target frequency band, reducing dips at certain frequency points, and making the reception effect more uniform across the entire band. This directly improves the performance ceiling and application range of the magnetic receiving antenna, enabling miniaturization and multi-functionality of the device.

[0025] In this embodiment, the ferrite sheet 11 can be a manganese zinc ferrite sheet 11.

[0026] The first mounting member 6 is disposed at one end of the plurality of ferrite sheets 11, and the second mounting member 7 is disposed at the other end of the plurality of ferrite sheets 11. The first mounting member 6 and the second mounting member 7 cooperate to clamp the plurality of ferrite sheets 11, so that the plurality of ferrite sheets 11 are kept in a clamped state.

[0027] To ensure that the multiple ferrite sheets 11 are more stably positioned between the first mounting member 6 and the second mounting member 7 and to prevent the ferrite sheets 11 from shifting, the first mounting member 6 is fixed to one end of the multiple ferrite sheets 11; the second mounting member 7 is fixed to the other end of the multiple ferrite sheets 11, thereby limiting the two ends of the multiple ferrite sheets 11. In addition, the first mounting member 6 and the second mounting member 7 work together to clamp the multiple ferrite sheets 11, so as to achieve a better limiting effect on the multiple ferrite sheets 11.

[0028] In one alternative embodiment, a first limiting groove can be provided on the first mounting member 6, and a second limiting groove can be provided on the second mounting member 7. One end of the plurality of ferrite sheets 11 is disposed in the first limiting groove, and the other end of the plurality of ferrite sheets 11 is disposed in the second limiting groove.

[0029] Furthermore, the first mounting component 6 is bonded to one end of the plurality of ferrite sheets 11 by thermally conductive adhesive; the second mounting component 7 is bonded to the other end of the plurality of ferrite sheets 11 by thermally conductive adhesive.

[0030] The first mounting member 6 is bonded to one end of the plurality of ferrite sheets 11 using thermally conductive adhesive, thereby fixing the ferrite sheet 11 located at one end of the plurality of ferrite sheets 11 to the first mounting member 6 and restricting the position of the ferrite sheet 11. The second mounting member 7 is bonded to the other end of the plurality of ferrite sheets 11 using thermally conductive adhesive, thereby fixing the ferrite sheet 11 located at the other end of the plurality of ferrite sheets 11 to the second mounting member 7 and restricting the position of the ferrite sheet 11. After the positions of the ferrite sheets 11 at both ends are restricted, the clamping force of the first mounting member 6 and the second mounting member 7 on the plurality of ferrite sheets 11 can achieve a good limiting and fixing effect on the plurality of ferrite sheets 11.

[0031] The thermally conductive adhesive can be thermally conductive silicone, which can enhance the thermal conductivity of the first mounting component 6 and the ferrite sheet 11, and enhance the thermal conductivity of the second mounting component 7 and the ferrite sheet 11.

[0032] Furthermore, the thermally conductive adhesive can provide a certain buffering effect, acting as a buffer between the first mounting component 6 and the ferrite sheet 11, and between the second mounting component 7 and the ferrite sheet 11, thereby protecting the ferrite sheet 11.

[0033] The first mounting component 6 and the second mounting component 7 can be in the form of a plate or a block, or any other suitable form.

[0034] In addition, in other alternative implementations... The first mounting component 6 is bonded to one end of the plurality of ferrite sheets 11 via an epoxy resin adhesive layer; the second mounting component 7 is bonded to the other end of the plurality of ferrite sheets 11 via an epoxy resin adhesive layer.

[0035] Furthermore, the extension directions of the multiple ferrite sheets 11 are all arranged in parallel.

[0036] The outer contour of the ferrite sheet 11 is rectangular, and the length direction of the ferrite sheet 11 is the extension direction of the ferrite sheet 11. The extension directions of multiple ferrite sheets 11 are parallel, and the outer edges of adjacent ferrite sheets 11 are aligned, so that multiple ferrite sheets 11 stacked sequentially along the first direction form a cubic structure.

[0037] The cubic composite magnetic core 1 has a compact structure and a relatively small footprint, which facilitates the arrangement of the composite magnetic core 1. Furthermore, when the number of ferrite sheets 11 is the same, the volume of the cubic composite magnetic core 1 is relatively small. Therefore, within the same arrangement space, the cubic composite magnetic core 1 can accommodate more ferrite sheets 11.

[0038] In this embodiment, the composite magnetic core 1 is formed by stacking 12 manganese-zinc ferrite sheets 11 with a specification of 50mm*10mm*2mm in sequence along the first direction, and the composite magnetic core 1 forms a cubic structure of about 50mm*10mm*24mm.

[0039] Furthermore, the extension directions of two adjacent ferrite sheets 11 are arranged perpendicularly.

[0040] The outer contour of the ferrite sheet 11 is rectangular, and the length direction of the ferrite sheet 11 is the extension direction of the ferrite sheet 11. The extension directions of two adjacent ferrite sheets 11 are perpendicular. Specifically, for example, if there are four ferrite sheets 11, along the first direction, the extension direction of the first ferrite sheet 11 is set along the second direction, the extension direction of the second ferrite sheet 11 is set along the third direction, the extension direction of the third ferrite sheet 11 is set along the second direction, and the extension direction of the fourth ferrite sheet 11 is set along the third direction. The second direction is perpendicular to the third direction, and the first direction is perpendicular to the second direction and the third direction.

[0041] The two adjacent ferrite sheets 11 are arranged perpendicularly to maximize the magnetic circuit efficiency, giving the magnetic receiving antenna good performance.

[0042] Furthermore, the composite magnetic core 1 is wound with coils 12 in at least two winding directions.

[0043] A coil 12 is wound on the composite magnetic core 1. The composite magnetic core 1 has at least two winding directions for the coil 12, and the number of turns of the coil 12 is different for the different winding directions.

[0044] The composite magnetic core 1 has coils 12 wound in at least two different winding directions, which allows for a suitable number of coils 12 to be wound on the composite magnetic core 1, so that the magnetic receiving antenna has good performance, and the number of coils 12 is not excessive, thereby reducing costs.

[0045] like Figure 4 As shown, in different winding directions, the coils 12 can be arranged sequentially along the length direction of the composite magnetic core 1 or along the width direction of the composite magnetic core 1.

[0046] Furthermore, the magnetic receiving antenna also includes a main receiving coil 3; the main receiving coil 3 includes a magnetic core body 31 and multiple sets of Litz wires 32; the magnetic core body 31 is disposed on the second mounting member 7; the magnetic core body 31 is ring-shaped, and multiple sets of Litz wires 32 are wound on the magnetic core body 31 respectively, and the multiple sets of Litz wires 32 are spaced apart along the circumference of the magnetic core body 31.

[0047] The magnetic core body 31 is fixedly mounted on the second mounting component 7.

[0048] Multiple sets of Litz wires 32 are spaced apart along the circumference of the magnetic core body 31 to generate the main induced electromotive force. Their inductance is designed to cover the target low frequency band (such as LW / MW) to reduce distributed capacitance, make the charge distribution uniform, and give the magnetic receiving antenna a strong anti-electromagnetic interference capability.

[0049] In this embodiment, 250 turns of φ0.1mm Litz wire 32 are wound, with a 1mm interval every 50 turns along the circumference of the magnetic core body 31.

[0050] like Figure 6 As shown, by setting multiple sets of Litz lines 32 at intervals and the circuit board 5, the magnetic receiving antenna has multiple resonant points, achieving a wideband flat response from 150kHz to 30MHz without the need for complex external band switching circuits.

[0051] The main receiving coil 3 interacts directly with electromagnetic waves in space, completing magneto-electric conversion and frequency selection to capture the desired radio signal. As the magnetic field of the electromagnetic wave changes, the magnetic flux through the main receiving coil 3 also changes, inducing a weak AC voltage signal with the same frequency as the original signal at its terminals. This completes the crucial first step of converting intangible magnetic field energy into a tangible electrical signal. It also determines the receiving direction and range of the magnetic receiving antenna and can be used to suppress interference. For example, when an AM radio receives a medium-wave station, rotating the receiver to align the magnetic rod with the direction of the interference source minimizes the interference signal, allowing for clear reception of stations from another direction. The main receiving coil 3 is a key component of the magnetic receiving antenna; it is directly responsible for sensing, converting, and initially selecting signals, and its performance fundamentally determines the receiving capability of the entire antenna system.

[0052] Furthermore, the magnetic receiving antenna also includes an auxiliary tuning coil 2; the auxiliary tuning coil 2 is disposed on the end face of the first mounting member 6 away from the composite magnetic core 1; one end of the auxiliary tuning coil 2 passes through the first mounting member 6 and is connected to the coil 12 wound on the composite magnetic core 1.

[0053] The auxiliary tuning coil 2 is fixedly mounted on the end face of the first mounting member 6 away from the composite magnetic core 1. After one end of the auxiliary tuning coil 2 passes through the first mounting member 6, the other end of the auxiliary tuning coil 2 is connected to the coil 12 wound on the composite magnetic core 1. The other end of the auxiliary tuning coil 2 and the coil 12 wound on the composite magnetic core 1 can be soldered or connected by a connector.

[0054] The auxiliary tuning coil 2 inductor forms a parallel resonance with an integrated fixed capacitor to extend the response in high-frequency bands (such as SW).

[0055] In this embodiment, the auxiliary tuning coil 2 is made of Litz wire 32 of the same specification as the coil 12 wound on the composite magnetic core 1, with 25 turns.

[0056] The auxiliary tuning coil 2 obtains energy from the main receiving coil 3 through electromagnetic induction. As an independent secondary coil, the auxiliary tuning coil 2 exchanges energy with the main receiving coil 3 via magnetic coupling. This is analogous to a miniature transformer. By selecting the number of turns of the auxiliary tuning coil 2, its output impedance can be designed to match the input impedance required by the back-end amplifier, achieving impedance transformation. Magnetic coupling, rather than direct electrical connection, effectively isolates the influence of the back-end circuitry on the main tuning circuit. The main circuit can operate freely in its optimal state—a high Q value and a sharp resonant curve—ensuring good frequency selectivity and sensitivity of the magnetic receiving antenna. The amplifier sees a suitable source impedance, while the main resonant circuit is almost unaffected by the amplifier's low impedance, thus maintaining its high Q value and excellent selectivity. Signal energy is efficiently transferred to subsequent circuitry and impedance matching is achieved without significantly degrading the performance of the antenna body (main receiving coil 3).

[0057] Among them, the antenna Q-factor (quality factor) is a key dimensionless parameter for measuring antenna performance, representing the ratio of stored energy to dissipated energy, and directly affecting its bandwidth, efficiency, and directivity.

[0058] Furthermore, the magnetic receiving antenna also includes a circuit board 5; the circuit board 5 is disposed above the auxiliary tuning coil 2; the coil 12 wound on the composite magnetic core 1, the main receiving coil 3 and the auxiliary tuning coil 2 are all connected to the circuit board 5.

[0059] The magnetic receiving antenna integrates a π-type or T-type passive matching network, which is directly connected to coil 12, main receiving coil 3, and auxiliary tuning coil 2 on the composite magnetic core 1. This network includes adjustable capacitors and fixed resistors to achieve broadband matching between the antenna impedance and the input impedance of the back-end amplifier, reduce the standing wave ratio (SWR), and control the antenna's equivalent Q value within an optimal range.

[0060] In this embodiment, the circuit board 5 is fabricated on the FR-4 circuit board 5. The circuit board 5 includes two 100pF NPO chip capacitors (C1, C2) and a 500Ω chip resistor (R1) forming a π-type network.

[0061] The coil 12, the main receiving coil 3, and the auxiliary tuning coil 2, which are wound on the composite magnetic core 1, are respectively connected to the coil leads, and the circuit board 5 is directly connected to the coil leads through solder joints.

[0062] The function of circuit board 5 is to efficiently and selectively transmit the signal received by the magnetic receiving antenna to the subsequent RF receiving circuit, and to perform functions such as impedance matching, tuning, and filtering. The FR-4 circuit board 5 has good mechanical strength and stability, providing a robust and reliable mounting platform for the fragile composite magnetic core 1, coil 12, main receiving coil 3, auxiliary tuning coil 2, and related electronic components (such as capacitors and inductors). The matching circuit on circuit board 5 (usually composed of capacitors, inductors, and coil taps) performs impedance transformation through series or parallel capacitors and taps. Its goal is to convert the complex impedance of the magnetic receiving antenna coil into the purely resistive impedance required by the amplifier, thereby achieving maximum power transmission. This is like adding an adapter between a wide water pipe and a narrow water pipe, allowing the water flow (signal energy) to pass through most efficiently. Without this circuit board 5, the magnetic receiving antenna is just a simple component that can sense electromagnetic fields; with circuit board 5, a complete, efficient, and tunable magnetic receiving antenna can be constructed.

[0063] Furthermore, the magnetic receiving antenna also includes a shield 4; the shield 4 is disposed on the top of the magnetic receiving antenna; the top surface of the shield 4 is provided with a slit structure 41; the shield 4 is an aluminum shield 4.

[0064] The composite magnetic core 1 and the main receiving coil 3 are fixedly disposed on the upper surface of the second mounting member 7. The first mounting member 6 is disposed above the composite magnetic core 1. The auxiliary tuning coil 2 is fixedly disposed on the upper surface of the first mounting member 6. The circuit board 5 is disposed above the auxiliary tuning coil 2, and the circuit board 5 and the auxiliary tuning coil 2 are spaced apart. The shielding cover 4 is disposed above the circuit board 5, and the circuit board 5 and the shielding cover 4 are spaced apart.

[0065] The magnetic receiving antenna also includes a plastic housing. The first mounting component 6, the second mounting component 7, the circuit board 5, and the shielding cover 4 are all fixed in suitable positions within the plastic housing. The plastic housing provides waterproofing for the components inside. Furthermore, the plastic housing secures the composite magnetic core 1, the main receiving coil 3, the auxiliary tuning coil 2, and the circuit board 5, making their inductance parameters less susceptible to changes in the surrounding environment, ensuring long-term stable performance, and facilitating integration and production. This allows the magnetic receiving antenna to form modular components, simplifying installation and debugging, and making it suitable for automated mass production.

[0066] The shield 4 can be made of a non-magnetic metal, such as copper or aluminum. The top surface of the shield 4 has a slit structure 41, which allows electromagnetic waves from the target direction to enter the shield 4, while shielding electromagnetic interference and circuit self-oscillation from other directions.

[0067] In this embodiment, the shielding cover 4 is an aluminum shielding cover 4 with a thickness of 0.5mm. The length of the slit structure 41 is 30mm and the width is 2mm. There are multiple slit structures 41, which are spaced apart.

[0068] The shield 4 isolates harmful electric field interference while allowing useful magnetic field signals to pass through smoothly, thereby improving the signal-to-noise ratio and anti-interference capability of the magnetic receiving antenna. Consequently, background noise such as hissing introduced by the electric field is significantly reduced in the signal received by the magnetic receiving antenna, improving listening clarity. The aluminum shield 4 minimizes noise interference while maximizing signal strength, achieving clear and stable reception.

[0069] The composite magnetic core 1 can attract magnetic field lines within a certain range, and the main receiving coil 3 can capture magnetic field lines. The size and design (inductance and Q value) of the main receiving coil 3 determine the frequency of magnetic field lines that the magnetic receiving antenna can capture, as well as its sensitivity and selectivity. The variable capacitor can select magnetic field lines of different frequencies. The auxiliary tuning coil 2 transmits the signal to the amplifier without interfering with the main receiving coil 3. The shield 4 prevents power plant interference, enabling the magnetic receiving antenna to receive magnetic field signals well.

[0070] The magnetic receiving antenna provided in this embodiment, as tested by a vector network analyzer, has a standing wave ratio of less than 2.5 in the 0.5-30MHz frequency band, and its sensitivity at 1MHz is 6dB higher than that of a traditional ferrite rod antenna of the same volume. The measured reception performance is better.

[0071] The magnetic receiving antenna provided in this embodiment has a compact structure, high sensitivity, wide operating bandwidth, good stability, and is easy to manufacture. It can resist the obstruction of the magnetic receiving antenna signal by the body sheet metal in the vehicle environment and the electromagnetic interference from various electrical components.

[0072] The vehicle provided in this embodiment includes the magnetic receiving antenna provided in this embodiment. Multiple ferrite sheets 11 stacked sequentially along a first direction form a composite magnetic core 1. This composite magnetic core 1 structure can increase the effective magnetic flux area within a limited volume. Compared to a traditional magnetic rod, the effective permeability of the composite magnetic core 1 in this embodiment is increased by 40%-60% in the same volume, which can enhance the magnetic field collection capability, improve the signal-to-noise ratio, and improve the performance of the magnetic receiving antenna, thereby improving the performance of the vehicle-mounted radio.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic receiving antenna, characterized in that, It includes a composite magnetic core (1), a first mounting component (6), and a second mounting component (7); The composite magnetic core (1) includes a plurality of ferrite sheets (11) stacked sequentially along a first direction; Along the first direction, the first mounting member (6) is disposed at one end of the plurality of ferrite sheets (11), and the second mounting member (7) is disposed at the other end of the plurality of ferrite sheets (11). The first mounting member (6) and the second mounting member (7) cooperate to clamp the plurality of ferrite sheets (11).

2. The magnetic receiving antenna according to claim 1, characterized in that, The first mounting component (6) is bonded to one end of the plurality of ferrite sheets (11) by thermally conductive adhesive; the second mounting component (7) is bonded to the other end of the plurality of ferrite sheets (11) by thermally conductive adhesive.

3. The magnetic receiving antenna according to claim 1, characterized in that, The extension directions of the plurality of ferrite sheets (11) are all arranged in parallel.

4. The magnetic receiving antenna according to claim 1, characterized in that, The two adjacent ferrite sheets (11) are arranged perpendicularly in their extension directions.

5. The magnetic receiving antenna according to claim 1, characterized in that, The composite magnetic core (1) has coils (12) wound in at least two different winding directions.

6. The magnetic receiving antenna according to claim 1, characterized in that, The magnetic receiving antenna also includes a main receiving coil (3); The main receiving coil (3) includes a magnetic core body (31) and multiple sets of Litz wires (32); the magnetic core body (31) is mounted on the second mounting component (7); The magnetic core body (31) is ring-shaped, and multiple sets of Litz wires (32) are wound around the magnetic core body (31); and multiple sets of Litz wires (32) are spaced apart along the circumference of the magnetic core body (31).

7. The magnetic receiving antenna according to claim 6, characterized in that, The magnetic receiving antenna also includes an auxiliary tuning coil (2); The auxiliary tuning coil (2) is disposed on the end face of the first mounting member (6) away from the composite magnetic core (1); one end of the auxiliary tuning coil (2) passes through the first mounting member (6) and is connected to the coil wound on the composite magnetic core (1).

8. The magnetic receiving antenna according to claim 7, characterized in that, The magnetic receiving antenna also includes a circuit board (5); The circuit board (5) is positioned above the auxiliary tuning coil (2); The coil wound on the composite magnetic core (1), the main receiving coil (3) and the auxiliary tuning coil (2) are all connected to the circuit board (5).

9. The magnetic receiving antenna according to any one of claims 1-8, characterized in that, The magnetic receiving antenna also includes a shield (4); The shield (4) is disposed on the top of the magnetic receiving antenna; the top surface of the shield (4) is provided with a slit structure (41); the shield (4) is an aluminum shield (4).

10. A vehicle, characterized in that, The magnetic receiving antenna includes any one of claims 1-9.

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