Antenna assembly and electromagnetic detection device for simultaneous detection of magnetic and electric fields

Abstract

This application discloses an antenna assembly and an electromagnetic detection device for simultaneously detecting magnetic and electric fields. The antenna assembly for simultaneously detecting magnetic and electric fields includes: a substrate; a feed port disposed on a side wall of the substrate; a first antenna disposed on the substrate and electrically connected to the feed port, the first antenna being used to detect the electric field; and a second antenna disposed on the substrate and electrically connected to the first antenna, the second antenna being used to detect the magnetic field. By setting the first and second antennas on the substrate, both electric and magnetic fields can be detected simultaneously using the first and second antennas, solving the problem of the inability to simultaneously detect electric and magnetic fields in the prior art, reducing the amount and difficulty of subsequent data processing, and improving detection efficiency.

Description

Technical Field

[0001] This application relates to the field of electromagnetic detection technology, and more particularly to an antenna assembly and electromagnetic detection device for simultaneously detecting magnetic and electric fields. Background Technology

[0002] Related technologies typically configure antennas into specific shapes, making them suitable for detecting electric or magnetic fields within a specific frequency range. However, existing antennas cannot detect both electric and magnetic fields simultaneously, which increases the workload and difficulty of subsequent data processing. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, the present application proposes an antenna assembly for simultaneously detecting magnetic and electric fields, comprising: a substrate; a feed port disposed on the side wall of the substrate; a first antenna disposed on the substrate and electrically connected to the feed port, the first antenna being used to detect the electric field; and a second antenna disposed on the substrate and electrically connected to the first antenna, the second antenna being used to detect the magnetic field.

[0005] In some technical solutions provided in this application, the first antenna includes: a first antenna arm, electrically connected to a feed port; a second antenna arm, electrically connected to a feed port, the first antenna arm and the second antenna arm being symmetrically arranged and together forming a dipole; the second antenna includes a ring structure, the second antenna having a first end and a second end, the first end of the second antenna being electrically connected to the first antenna arm, and the second end of the second antenna being electrically connected to the second antenna arm; wherein, the first antenna is used to detect the electric field of a first frequency band, the second antenna is used to detect the magnetic field of a second frequency band, and the frequency of the first frequency band is higher than the frequency of the second frequency band.

[0006] In some of the technical solutions provided in this application, the first antenna arm and the second antenna arm have the same shape, and the first antenna arm and the second antenna arm are polygonal.

[0007] In some of the technical solutions provided in this application, the ring structure in the second antenna has an opening, and the two ends of the opening are the first end of the second antenna and the second end of the second antenna, respectively.

[0008] In some of the technical solutions provided in this application, the first antenna arm is located on the first side of the substrate, and the second antenna arm is located on the second side of the substrate, with the first side of the substrate and the second side of the substrate facing away from each other.

[0009] In some of the technical solutions provided in this application, the antenna assembly for simultaneously detecting magnetic and electric fields further includes: two microstrip transmission lines, respectively disposed on the first surface and the second surface of the substrate, the microstrip transmission lines being conductive, and the two microstrip transmission lines being used to connect the first antenna arm and the second antenna arm to the feed port, respectively.

[0010] In some technical solutions provided in this application, the antenna assembly for simultaneously detecting magnetic and electric fields further includes: two inductor elements disposed on a substrate, the first end of the second antenna being located on the first surface of the substrate, the second end of the second antenna being located on the second surface of the substrate, one of the two inductor elements being disposed on the first surface of the substrate and connecting the first end of the second antenna to the first antenna arm, and the other of the two inductor elements being disposed on the second surface of the substrate and connecting the second end of the second antenna to the second antenna arm.

[0011] In some of the technical solutions provided in this application, the substrate has a via, a portion of the second antenna close to the first end of the second antenna is located on the first surface of the substrate, and another portion of the second antenna extends from the first surface of the substrate through the via to the second surface of the substrate, so that the second end of the second antenna is located on the second surface of the substrate.

[0012] In some of the technical solutions provided in this application, the first antenna arm and the second antenna arm are symmetrically arranged on both sides of the feed port.

[0013] The second aspect of this application provides an electromagnetic detection device, comprising: the antenna assembly for simultaneously detecting magnetic and electric fields as proposed in the first aspect of this application.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: This application solves the problem of the inability to detect electric and magnetic fields simultaneously by setting a first antenna and a second antenna on the substrate, thereby reducing the amount and difficulty of subsequent data processing and improving detection efficiency. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This illustration shows one of the structural schematic diagrams of an antenna assembly for simultaneously detecting magnetic and electric fields, according to an embodiment of this application. Figure 2 This is a second schematic diagram of the structure of an antenna assembly for simultaneously detecting magnetic and electric fields, provided in an embodiment of this application. Figure 3 The diagram shows the S-parameter curves of the electric field detection capability in the high-frequency range of an antenna assembly for simultaneously detecting magnetic and electric fields, provided in an embodiment of this application. Figure 4 The diagram shows the induced voltage curve of the magnetic field detection capability of an antenna assembly for simultaneously detecting magnetic and electric fields in the low-frequency range, as provided in an embodiment of this application.

[0016] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Antenna assembly; 110 Substrate; 111 First side of substrate; 112 Via; 120 Feed port; 130 First antenna; 131 First antenna arm; 132 Second antenna arm; 140 Second antenna; 141 Opening; 150 Microstrip transmission line; 160 Inductor element. Detailed Implementation

[0017] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0018] The following reference Figures 1 to 4 This invention describes antenna assemblies and electromagnetic detection devices for simultaneously detecting magnetic and electric fields, according to some embodiments of the present invention.

[0019] In one embodiment according to this application, such as Figure 1 and Figure 2 As shown, this application proposes an antenna assembly 100 for simultaneously detecting magnetic and electric fields, comprising: a substrate 110; a feed port 120 disposed on the sidewall of the substrate 110; a first antenna 130 disposed on the substrate 110, the first antenna 130 being electrically connected to the feed port 120, and the first antenna 130 being used to detect the electric field; and a second antenna 140 disposed on the substrate 110, the second antenna 140 being electrically connected to the first antenna 130, and the second antenna 140 being used to detect the magnetic field.

[0020] The antenna for simultaneously detecting magnetic and electric fields (hereinafter referred to as antenna assembly 100) proposed in this application is capable of simultaneously detecting electric and magnetic fields. Antenna assembly 100 includes a substrate 110, a first antenna 130 and a second antenna 140. The first antenna 130 and the second antenna 140 are both disposed on the substrate 110, and the first antenna 130 and the second antenna 140 are used to detect electric and magnetic fields, respectively.

[0021] Specifically, the substrate 110 is typically made of PTFE (Polytetrafluoroethylene) or FR-4 (Flame Retardant 4, glass fiber reinforced epoxy resin copper-clad laminate) materials. The substrate 110 is a plate-shaped component, and a feed port 120 is provided on its sidewall. The first antenna 130 is connected to the feed port 120. Specifically, the feed port 120 can be connected to external detection equipment. The electric field detection results of the first antenna 130 can be transmitted to the external detection equipment through the feed port 120, enabling the external detection equipment to analyze the detection results of the first antenna 130. The external detection equipment can be a spectrum analyzer, oscilloscope, etc.

[0022] Furthermore, the second antenna 140 is electrically connected to the first antenna 130. The second antenna 140 is used to detect the magnetic field. Since the second antenna 140 is electrically connected to the first antenna 130, the second antenna 140 is also electrically connected to the feed port 120. The detection result of the magnetic field by the second antenna 140 can be transmitted to the external detection equipment through the feed port 120 so that the external detection equipment can analyze the detection result of the second antenna 140.

[0023] Furthermore, the power supply port 120 can also be connected to an external back-end system. The back-end system provides excitation energy to the first antenna 130 and the second antenna 140 through the power supply port 120 to ensure that the first antenna 130 and the second antenna 140 are in a stable electromagnetic coupling state, and to avoid a decrease in detection sensitivity due to insufficient energy.

[0024] By setting a first antenna 130 and a second antenna 140 on the substrate 110, electric and magnetic fields can be detected simultaneously through the first antenna 130 and the second antenna 140, which solves the problem that electric and magnetic fields cannot be detected simultaneously in the prior art, reduces the amount of data processing and processing difficulty in the later stage, and improves the detection efficiency.

[0025] In some embodiments, optionally, such as Figure 1 and Figure 2As shown, the first antenna 130 includes: a first antenna arm 131, electrically connected to a feed port 120; a second antenna arm 132, electrically connected to a feed port 120, the first antenna arm 131 and the second antenna arm 132 are symmetrically arranged and together form a dipole; the second antenna 140 includes a ring structure, the second antenna 140 has a first end and a second end, the first end of the second antenna 140 is electrically connected to the first antenna arm 131, and the second end of the second antenna 140 is electrically connected to the second antenna arm 132; wherein, the first antenna 130 is used to detect the electric field of a first frequency band, and the second antenna 140 is used to detect the magnetic field of a second frequency band, the frequency of the first frequency band is higher than the frequency of the second frequency band.

[0026] In this embodiment, the first antenna 130 and the second antenna 140 are defined. The first antenna 130 is a planar dipole antenna. Specifically, the first antenna 130 includes a first antenna arm 131 and a second antenna arm 132. Both the first antenna arm 131 and the second antenna arm 132 are electrically connected to the feed port 120, and the first antenna arm 131 and the second antenna arm 132 are symmetrically arranged, together forming a planar dipole antenna. The first antenna arm 131 and the second antenna arm 132 are printed on the substrate 110.

[0027] Furthermore, the second antenna 140 includes a ring structure, which can be one or multiple. If multiple ring structures are present, they are sequentially connected end-to-end to form a spiral structure. The second antenna 140 has a first end and a second end. The first end of the second antenna 140 is conductively connected to the first antenna arm 131, and the second end of the second antenna 140 is conductively connected to the second antenna arm 132. This allows the second antenna 140 to be conductively connected to the feed port 120 via a first wire. The ring structure of the second antenna arm 132 is printed on the substrate 110.

[0028] Furthermore, the first antenna 130 is used to detect the electric field in the first frequency band, and the second antenna 140 is used to detect the magnetic field in the second frequency band. The frequency of the first frequency band is higher than the frequency of the second frequency band; that is, the first antenna 130 can detect higher-frequency electric fields, and the second antenna 140 can detect lower-frequency magnetic fields. Understandably, the first antenna 130 is a dipole antenna, comprising two symmetrically arranged antenna arms. This structure is sensitive to electric fields. When the electric field component of a high-frequency electromagnetic wave acts on the first antenna 130, the electric field will generate opposite forces on the first antenna arm 131 and the second antenna arm 132, generating an induced dipole moment. This induces an alternating voltage at the ends of the first antenna arm 131 and the second antenna arm 132. At high frequencies, this induced voltage will drive a current to oscillate within the first antenna 130. The second antenna 140 includes a loop structure, meaning that the shape of the second antenna 140 is close to a closed loop. This structure matches the electromagnetic induction law of low-frequency magnetic fields. The changing magnetic flux will induce an electromotive force in the second antenna 140, so the second antenna 140 can detect low-frequency magnetic fields. Figure 3 The figure shows the S-parameter curve of the electric field detection capability of the antenna component 100 in the high frequency range. The horizontal axis of the figure is frequency, and the vertical axis is S-parameter. The S-parameter is S(1,1), which represents the reflection coefficient of port 1, that is, how much of the signal incident from port 1 is reflected back. The unit of S-parameter is dB. Figure 4 The figure shows the induced voltage curve of the magnetic field detection capability of the antenna assembly 100 in the low-frequency range. The horizontal axis represents frequency, and the vertical axis represents the induced voltage value. Figure 4 m1 to m9 are nine different sampling points, each corresponding to a different frequency value and induced voltage value.

[0029] This application enables high-frequency electric field detection via the first antenna 130 and low-frequency magnetic field detection via the second antenna 140 by setting the first antenna 130 as a dipole antenna structure and setting a loop structure in the second antenna 140.

[0030] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the first antenna arm 131 and the second antenna arm 132 have the same shape, and the first antenna arm 131 and the second antenna arm 132 are polygonal.

[0031] In this embodiment, the shapes of the first antenna arm 131 and the second antenna arm 132 are defined. The first antenna arm 131 and the second antenna arm 132 have the same shape, and both the first antenna arm 131 and the second antenna arm 132 are polygonal. In one possible embodiment, the first antenna arm 131 and the second antenna arm 132 have a bowtie-shaped structure and are symmetrically arranged. The first antenna arm 131 and the second antenna arm 132 may also be rectangular or other polygonal shapes.

[0032] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the annular structure in the second antenna 140 has an opening 141, and the two ends of the opening 141 are the first end of the second antenna 140 and the second antenna 140, respectively.

[0033] In this embodiment, the structure of the second antenna 140 is further defined. The annular structure in the second antenna 140 has an opening 141, meaning the second antenna 140 is not a closed annular structure. The two ends of the opening 141 are the first end and the second end of the second antenna 140, respectively. Specifically, the two ends of the opening 141 in the annular structure of the second antenna 140 are electrically connected to the first antenna arm 131 and the second antenna arm 132, respectively.

[0034] By providing an opening 141 in the annular structure of the second antenna 140, it is easy to electrically connect the second antenna 140 to the first antenna arm 131 and the second antenna arm 132 of the first antenna 130. This facilitates the conductive connection between the second antenna 140 and the feed port 120, allowing the detection results of the magnetic field from the second antenna 140 to be transmitted to external detection equipment through the feed port 120 for analysis. Furthermore, the backend system provides excitation energy to the first antenna 130 and the second antenna 140 through the feed port 120, ensuring that the first antenna 130 and the second antenna 140 are in a stable electromagnetic coupling state and preventing a decrease in detection sensitivity due to insufficient energy.

[0035] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the first antenna arm 131 is located on the first surface 111 of the substrate, and the second antenna arm 132 is located on the second surface of the substrate 110. The first surface 111 of the substrate and the second surface of the substrate 110 are opposite to each other.

[0036] In this embodiment, the positions of the first antenna arm 131 and the second antenna arm 132 are defined. The first antenna arm 131 and the second antenna arm 132 are respectively disposed on the front and back sides of the substrate 110. Specifically, the first antenna arm 131 is located on the first surface 111 of the substrate, and the second antenna arm 132 is located on the second surface of the substrate 110, with the first surface 111 and the second surface of the substrate 110 facing away from each other. In one possible embodiment, the first antenna arm 131 is printed on the front side of the substrate 110, and the second antenna arm 132 is printed on the back side of the substrate 110. Figure 1 and Figure 2 The second antenna arm 132, shown by the dashed line, is located on the second surface of the substrate 110.

[0037] By distributing the first antenna arm 131 and the second antenna arm 132 on opposite sides of the substrate 110, the first antenna 130 can achieve better balance. Furthermore, distributing the first antenna arm 131 and the second antenna arm 132 on opposite sides of the substrate 110 also eliminates parasitic interference caused by a single-surface layout. Understandably, if the first antenna arm 131 and the second antenna arm 132 are both designed on the same surface, significant parasitic capacitance will occur due to their close proximity, i.e., electric field coupling between adjacent conductors, leading to increased high-frequency signal reflection and narrower frequency band coverage. However, by distributing the first antenna arm 131 and the second antenna arm 132 on two separate surfaces, they are isolated by the substrate 110, significantly reducing parasitic capacitance and improving signal transmission efficiency.

[0038] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the antenna assembly 100 for simultaneously detecting magnetic and electric fields further includes two microstrip transmission lines 150, which are respectively disposed on the first surface 111 of the substrate and the second surface of the substrate 110. The microstrip transmission lines 150 are conductive, and the two microstrip transmission lines 150 are respectively used to connect the first antenna arm 131 and the second antenna arm 132 to the feed port 120.

[0039] In this embodiment, the structure of the antenna assembly 100 is further defined. The antenna assembly 100 also includes two microstrip transmission lines 150, which are used to connect the first antenna arm 131 and the second antenna arm 132 to the feed port 120, thereby realizing the conductive connection between the first antenna arm 131 and the second antenna arm 132 and the feed port 120. Specifically, the two microstrip transmission lines 150 are respectively disposed on the first surface 111 and the second surface of the substrate. The microstrip transmission line 150 disposed on the first surface 111 of the substrate connects the first antenna arm 131 to the feed port 120, and the microstrip transmission line 150 disposed on the second surface of the substrate connects the second antenna arm 132 to the feed port 120. Since the microstrip transmission lines 150 are made of conductive material, the first antenna arm 131 and the second antenna arm 132 can be conductively connected to the feed port 120 through the two microstrip transmission lines 150.

[0040] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the antenna assembly 100 for simultaneously detecting magnetic and electric fields further includes: two inductor elements 160 disposed on the substrate 110; the first end of the second antenna 140 is located on the first surface 111 of the substrate; the second end of the second antenna 140 is located on the second surface of the substrate 110; one of the two inductor elements 160 is disposed on the first surface 111 of the substrate and connects the first end of the second antenna 140 to the first antenna arm 131; the other inductor element 160 is disposed on the second surface of the substrate 110 and connects the second end of the second antenna 140 to the second antenna arm 132.

[0041] In this embodiment, the structure of the antenna assembly 100 is further defined. The antenna assembly 100 also includes two inductors 160, which are used to electrically connect the second antenna 140 to the first antenna 130. Specifically, the two ends of the second antenna 140 are located on the first surface 111 and the second surface of the substrate, respectively. The first end of the second antenna 140 is located on the first surface 111 of the substrate. One of the two inductors 160 is also located on the first surface 111 of the substrate, and this inductor 160 connects the first end of the second antenna 140 to the first antenna arm 131. The second end of the second antenna 140 is located on the second surface of the substrate 110. The other inductor 160 is also located on the second surface of the substrate 110, and this inductor 160 connects the second end of the second antenna 140 to the second antenna arm 132. In this way, the second antenna 140 can be electrically connected to the first antenna arm 131 and the second antenna arm 132, thereby achieving the electrical connection between the second antenna 140 and the feed port 120.

[0042] Furthermore, since inductors have the characteristics of high impedance at high frequencies and low impedance at low frequencies, they can block cross-frequency interference, so that the functions of the first antenna 130 and the second antenna 140 do not affect each other, ultimately achieving the technical effect of simultaneously detecting low-frequency magnetic fields and high-frequency electric fields.

[0043] The inductor 160 can be a printed inductor or a small chip inductor. This type of inductor 160 is adapted to planar printing technology and can be printed on the substrate 110.

[0044] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the substrate 110 has a via 112. A portion of the second antenna 140 near the first end of the second antenna 140 is located on the first surface 111 of the substrate. Another portion of the second antenna 140 extends from the first surface 111 of the substrate through the via 112 to the second surface of the substrate 110, so that the second end of the second antenna 140 is located on the second surface of the substrate 110.

[0045] In this embodiment, the structure of the substrate 110 is defined. The substrate 110 has a via 112, which is a through-hole. A portion of the second antenna 140 passes through the via 112, such that the first end of the second antenna 140 is located on the first surface 111 of the substrate, and the second end of the second antenna 140 is located on the second surface of the substrate 110. A portion of the second antenna 140 is located on the first surface 111 of the substrate, and another portion is located on the second surface of the substrate 110. Specifically, a portion of the second antenna 140 near its first end is located on the first surface 111 of the substrate, and another portion of the second antenna 140 includes its second end, which extends from the first surface 111 of the substrate through the via 112 to the second surface of the substrate 110, such that the second end of the second antenna 140 is located on the second surface of the substrate 110. By providing vias 112 on the substrate 110, the two ends of the second antenna 140 can be distributed on the front and back surfaces of the substrate 110, so that the two ends of the second antenna 140 can be electrically connected to the first antenna arm 131 and the second antenna arm 132, respectively.

[0046] In some embodiments, optionally, such as Figure 1 As shown, the first antenna arm 131 and the second antenna arm 132 are symmetrically arranged on both sides of the feed port 120.

[0047] In this embodiment, the positions of the first antenna arm 131 and the second antenna arm 132 are defined. The first antenna arm 131 and the second antenna arm 132 have a symmetrical structure; specifically, the first antenna arm 131 and the second antenna arm 132 are symmetrically arranged on both sides of the feed port 120. This satisfies the symmetry requirement of electric field coupling. The symmetrical first antenna arm 131 and the second antenna arm 132 ensure that the induced charge distribution of both is uniform in electric fields with different polarization directions, avoiding signal distortion caused by structural asymmetry, such as phase shift and amplitude fluctuation. Furthermore, it simplifies impedance matching. The symmetrically distributed first antenna arm 131 and the second antenna arm 132 have more stable input impedance, making impedance matching with the feed port 120 easier to achieve, reducing high-frequency signal reflection loss, and further optimizing the sensitivity of electric field detection.

[0048] In one possible embodiment, this application proposes a planar antenna structure, namely an antenna assembly 100 for simultaneously detecting magnetic and electric fields. The antenna assembly 100 includes a substrate 110, a first antenna 130, and a second antenna 140. The substrate 110 is provided with a feed port 120. The substrate 110 is a rectangular substrate 110, and the feed port 120 is located at the middle position of the front side of the substrate 110. The first antenna 130 includes a first antenna arm 131 and a second antenna arm 132. The first antenna arm 131 and the second antenna arm 132 together form a dipole structure, and the first antenna arm 131 and the second antenna arm 132 are respectively disposed on the front and back sides of the substrate 110. The upper and lower ends of the feed port 120 are connected to the first antenna arm 131 and the second antenna arm 132 of the first antenna 130 through microstrip transmission lines 150, respectively. The first antenna arm 131 is disposed on the first surface 111 of the substrate, which is the upper surface of the substrate 110. The second antenna arm 132 is disposed on the second surface of the substrate 110, which is the lower surface of the substrate 110. The first antenna 130 is bow-tie shaped. The first antenna arm 131 and the second antenna arm 132 are symmetrical and are respectively connected to the feed port 120 disposed on the side of the substrate 110 through a microstrip transmission line 150.

[0049] Furthermore, the second antenna 140 is mostly disposed on the first surface 111 of the substrate, that is, the upper surface of the substrate 110. The second antenna 140 is a ring structure missing a small part. One end of the second antenna 140 is connected to the first antenna arm 131 through an inductor 160, and the other end of the second antenna 140 passes through a via 112 on the substrate 110 to the second surface of the substrate 110, and is connected to the second antenna arm 132 through an inductor 160.

[0050] The second aspect of this application provides an electromagnetic detection device, including the antenna assembly 100 for simultaneously detecting magnetic and electric fields as proposed in any of the above embodiments.

[0051] The electromagnetic detection device proposed in the second aspect of this application, since it includes the antenna assembly 100 for simultaneously detecting magnetic and electric fields proposed in any of the above embodiments, has all the beneficial effects of the antenna assembly 100 for simultaneously detecting magnetic and electric fields proposed in any of the above embodiments.

[0052] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An antenna assembly for simultaneously detecting magnetic and electric fields, characterized in that, include: substrate; A power supply port is located on the side wall of the substrate; A first antenna is disposed on the substrate and is electrically connected to the feed port. The first antenna is used to detect the electric field. A second antenna is disposed on the substrate and is electrically connected to the first antenna. The second antenna is used to detect the magnetic field.

2. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 1, characterized in that, The first antenna includes: The first antenna arm is electrically connected to the feed port; The second antenna arm is electrically connected to the feed port. The first antenna arm and the second antenna arm are symmetrically arranged and together form a dipole. The second antenna includes a ring structure, and the second antenna has a first end and a second end. The first end of the second antenna is conductively connected to the first antenna arm, and the second end of the second antenna is conductively connected to the second antenna arm. The first antenna is used to detect the electric field of the first frequency band, and the second antenna is used to detect the magnetic field of the second frequency band. The frequency of the first frequency band is higher than the frequency of the second frequency band.

3. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 2, characterized in that, The first antenna arm and the second antenna arm have the same shape, and both the first antenna arm and the second antenna arm are polygonal.

4. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 2, characterized in that, The ring structure in the second antenna has an opening, the two ends of which are respectively the first end of the second antenna and the second end of the second antenna.

5. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 2, characterized in that, The first antenna arm is located on the first surface of the substrate, and the second antenna arm is located on the second surface of the substrate, with the first surface and the second surface of the substrate facing away from each other.

6. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 5, characterized in that, Also includes: Two microstrip transmission lines are respectively disposed on the first surface and the second surface of the substrate. The microstrip transmission lines are conductive and are used to connect the first antenna arm and the second antenna arm to the feed port.

7. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 5, characterized in that, Also includes: Two inductors are disposed on the substrate. The first end of the second antenna is located on the first surface of the substrate, and the second end of the second antenna is located on the second surface of the substrate. One of the two inductors is disposed on the first surface of the substrate and connects the first end of the second antenna to the first antenna arm. The other inductor is disposed on the second surface of the substrate and connects the second end of the second antenna to the second antenna arm.

8. The antenna assembly for simultaneously detecting magnetic and electric fields according to claim 7, characterized in that, The substrate has a via, and a portion of the second antenna near the first end of the second antenna is located on the first surface of the substrate. Another portion of the second antenna extends from the first surface of the substrate through the via to the second surface of the substrate, so that the second end of the second antenna is located on the second surface of the substrate.

9. The antenna assembly for simultaneously detecting magnetic and electric fields according to any one of claims 2 to 7, characterized in that, The first antenna arm and the second antenna arm are symmetrically arranged on both sides of the feed port.

10. An electromagnetic detection device, characterized in that, include: The antenna assembly for simultaneously detecting magnetic and electric fields as described in any one of claims 1 to 9.

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