A combined antenna and electronic device

Abstract

This invention discloses a combined antenna and electronic device. The combined antenna includes: a circuit board with a slot for microstrip slot coupling; a resonator including a first part and a second part, the first part having a first receiving cavity, one end of the first part being connected to the circuit board; the second part being located on the side of the first part facing away from the circuit board; a radiating patch housed within the first receiving cavity and connected to the circuit board; and a dielectric assembly disposed between the first and second parts, both ends of the dielectric assembly being connected to the first and second parts respectively, the dielectric assembly having a through-hole connecting the first and second receiving cavities. The circuit board and the resonator together form a dielectric resonator antenna for receiving 5G low-frequency signals, and the dielectric assembly and the circuit board together form an FP resonator antenna for receiving millimeter-wave signals. The FP resonator antenna and the dielectric resonator antenna share the same aperture, giving the combined antenna the advantage of compact size.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to a combined antenna and electronic device. Background Technology

[0002] An antenna is a transducer that transforms guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. Mobile phones and tablets typically contain antennas. 5G millimeter-wave antennas often combine RF chips and substrate antennas in an AIP (Antenna-in-Package) configuration to reduce RF system losses. This approach also offers higher integration and superior performance, enabling electronic scanning for comprehensive spatial coverage. A wide antenna beam angle is required, therefore the antenna needs a near-omnidirectional or wide-beam pattern.

[0003] According to 3GPP TS38.101-2 5G Terminal RF Technical Specification and TR38.817 Terminal RF Technical Report, 5G millimeter-wave antennas need to cover N257 (26.5-29.5GHz), N258 (24.25-27.25GHz), N260 (37-40GHz), and N261 (27.5-28.35GHz). However, 5G terminals also need to accommodate traditional low-frequency SUB6G antennas. While designing separate low-frequency and millimeter-wave antennas would achieve better results, it would require a larger area and result in lower aperture utilization. Summary of the Invention

[0004] This invention provides a combined antenna and electronic device, which aims to solve the problem that designing low-frequency and millimeter-wave antennas separately would occupy a large amount of space.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide a combined antenna, comprising:

[0006] The circuit board has slots for microstrip slot coupling;

[0007] A resonator includes a first part and a second part. The first part has a first receiving cavity, and one end of the first part is connected to the circuit board to close one end of the first receiving cavity. The second part is located on the side of the first part away from the circuit board and is spaced apart from the first part. The second part has a second receiving cavity.

[0008] A radiating patch is housed within the first receiving cavity and connected to the circuit board;

[0009] A medium assembly is disposed between the first part and the second part, with both ends of the medium assembly connected to the first part and the second part respectively. The medium assembly is provided with a through hole, which connects the first receiving cavity and the second receiving cavity.

[0010] The circuit board and the resonator together form a dielectric resonator antenna, which is used to receive 5G low-frequency signals; the dielectric component and the circuit board together form an FP resonant cavity antenna, the dielectric component forms a first reflective surface, the circuit board forms a second reflective surface, and the FP resonant cavity antenna is used to receive millimeter-wave signals.

[0011] Optionally, the operating wavelength of the FP resonant cavity antenna is λ1, and the distance between the circuit board and the dielectric assembly is h, wherein h satisfies: h = 0.5λ1.

[0012] Optionally, the dielectric assembly includes a first dielectric layer and a second dielectric layer, with both ends of the second dielectric layer connected to the first portion and the first dielectric layer respectively, and the first dielectric layer and the second dielectric layer are stacked; the perforation includes a first hole segment and a second hole segment, with the first hole segment disposed on the first dielectric layer and the second hole segment disposed on the second dielectric layer, and the second hole segment and the first hole segment being coaxially arranged.

[0013] Optionally, the thickness of the first dielectric layer is 1.2 to 1.6 mm.

[0014] Optionally, the thickness of the second dielectric layer is 1.0 to 1.2 mm.

[0015] Optionally, the radius of the first hole segment is 0.85 to 1.44 mm.

[0016] Optionally, the radius of the first hole segment is 1.7 to 2.3 mm.

[0017] Optionally, the operating frequency band of the combined antenna when operating in the low-frequency band is 2.25 to 3 GHz.

[0018] Optionally, the combined antenna operates in the millimeter-wave band at a frequency of 23–29.5 GHz.

[0019] The present invention also provides an electronic device comprising the combined antenna described in any of the preceding claims.

[0020] The beneficial effects of this invention are as follows: Unlike existing technologies, the combined antenna in this invention includes a circuit board, a resonator, a radiating patch, and a dielectric assembly. The surface of the circuit board has slots for microstrip slot coupling. After the antenna is fed, electromagnetic wave energy is conducted to the resonator through the slot coupling. The resonator includes a first part and a second part. The first part is located on one side of the circuit board and has a first receiving cavity. One end of the first part is connected to the circuit board to seal one end of the receiving cavity. The second part is located on the side of the first part away from the circuit board, and the second part and the first part are spaced apart. The second part has a second receiving cavity, which is located on one side of the first receiving cavity. The radiating patch is housed within the first receiving cavity and is connected to the circuit board. The dielectric assembly is generally plate-shaped and is disposed between the first and second parts. One end of the dielectric assembly is connected to the first part, and the other end is connected to the second part. The dielectric assembly has a through-hole that connects the first and second receiving cavities. The circuit board and the resonator together form a dielectric resonator antenna, which is used to receive 5G low-frequency signals. The dielectric component and circuit board together form the FP resonant cavity antenna. After the antenna is fed, electromagnetic wave energy is conducted through slot coupling to the radiating patch, and then to the FP resonant cavity antenna. The radiating patch is equivalent to the source antenna, and the circuit board is equivalent to an ideal ground. The dielectric component forms the first reflecting surface, and the circuit board forms the second reflecting surface. When the FP resonant cavity antenna is excited, the electromagnetic wave bounces back and forth between the first and second reflecting surfaces and propagates outwards from the cavity. The combined antenna integrates two antennas with different operating frequencies, and the radiating patch is housed within the first receiving cavity, achieving a common aperture for the FP resonant cavity antenna and the dielectric resonator antenna. This gives the combined antenna the advantages of compact size, low weight, and high aperture efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in specific embodiments of the present invention or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the combined antenna structure in one embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of a combined antenna in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of an FP resonant cavity antenna according to one embodiment of the present invention;

[0025] Figure 4This is a partial structural schematic diagram of the combined antenna in one embodiment of the present invention;

[0026] Figure 5 This is an S-parameter diagram of the combined antenna operating at low frequency in one embodiment of the present invention;

[0027] Figure 6 This is the radiation pattern of the combined antenna in the E-plane at low frequencies in one embodiment of the present invention;

[0028] Figure 7 This is the radiation pattern of the combined antenna in the H-plane at low frequencies in one embodiment of the present invention;

[0029] Figure 8 This is an S-parameter diagram of the combined antenna operating in the millimeter-wave band according to one embodiment of the present invention;

[0030] Figure 9 This is the radiation pattern of the combined antenna operating in the E-plane of the millimeter-wave band in one embodiment of the present invention;

[0031] Figure 10 This is the radiation pattern of the combined antenna operating in the H-plane of the millimeter-wave band in one embodiment of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 100, combined antenna; 1, circuit board; 11, slot; 2, resonator; 21, first part; 211, first receiving cavity; 22, second part; 221, second receiving cavity; 3, radiating patch; 4, dielectric assembly; 41, first dielectric layer; 411, first aperture segment; 42, second dielectric layer; 421, second aperture segment; 43, through hole; 5, feed element. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0035] Please see Figure 1 and Figure 2 The present invention provides a combined antenna 100, which includes a circuit board 1, a resonator 2, a radiating patch 3, and a dielectric component 4.

[0036] The surface of the circuit board 1 is provided with a slot 11 for coupling of the microstrip slot 11. After the antenna is fed, the electromagnetic wave energy is coupled and conducted to the resonator 2 through the slot 11.

[0037] The resonator 2 includes a first part 21 and a second part 22. The first part 21 is generally cuboid in shape and is located on one side of the circuit board 1. The first part 21 has a first receiving cavity 211, and one end of the first part 21 is connected to the circuit board 1 to seal one end of the receiving cavity. The second part 22 is generally cubic in shape and is located on the side of the first part 21 facing away from the circuit board 1. The second part 22 and the first part 21 are spaced apart. The second part 22 has a second receiving cavity 221, which is located on one side of the first receiving cavity 211.

[0038] The radiating patch 3 is generally in the shape of a thin sheet. The radiating patch 3 is housed in the first receiving cavity 211 and is connected to the circuit board 1.

[0039] The medium assembly 4 is generally plate-shaped and is disposed between the first part 21 and the second part 22. One end of the medium assembly 4 is connected to the first part 21, and the other end of the medium assembly 4 is connected to the second part 22. The medium assembly 4 is disposed in a through hole 43, which connects the first receiving cavity 211 and the second receiving cavity 221. Therefore, the opening of the second receiving cavity 221 away from the end of the medium assembly 4 is in an unsealed state.

[0040] In this configuration, circuit board 1 and resonator 2 together form dielectric resonator 2 antenna, which is used to receive 5G low-frequency signals. Dielectric component 4 and circuit board 1 together form FP (Fabry-Perot) resonant cavity antenna. After the antenna is fed, electromagnetic wave energy is coupled and conducted through slot 11 to radiating patch 3, and then to the FP resonant cavity antenna. Please refer to... Figure 3 The radiating patch 3 is equivalent to a source antenna, the circuit board 1 is equivalent to an ideal ground, the dielectric component 4 forms a first reflecting surface, and the circuit board 1 forms a second reflecting surface. When the FP resonant cavity antenna is excited, the electromagnetic wave reflects back and forth between the first and second reflecting surfaces and bounces towards the periphery of the cavity.

[0041] The combined antenna 100 integrates two antennas with different operating frequencies, and the radiating patch 3 is housed in the first receiving cavity 211, realizing that the FP resonant cavity antenna and the dielectric resonator 2 antenna have the same aperture, which makes the combined antenna 100 have the advantages of compact size, low weight and high aperture efficiency.

[0042] Please see Figure 1 In some embodiments, the combined antenna 100 further includes a feed element 5, which is located on one side of the resonator 2 and connected to the circuit board 1. In this embodiment, the feed element 5 is a cylindrical metal; in other embodiments, the feed element 5 may also be of other shapes.

[0043] Please see Figure 3 In some embodiments, the operating wavelength of the FP resonant cavity antenna is λ1, that is, the operating wavelength of the combined antenna 100 in the millimeter wave band is λ1, and the distance between the circuit board 1 and the dielectric component 4 is h, wherein h satisfies: h=0.5λ1.

[0044] Please see Figure 1 and Figure 2 In some embodiments, the dielectric assembly 4 includes a first dielectric layer 41 and a second dielectric layer 42. The second dielectric layer 42 is generally sheet-like and is located at one end of the dielectric assembly 4 near the first portion 21. Both ends of the second dielectric layer 42 are connected to the first portion 21 and the first dielectric layer 41, respectively. The first dielectric layer 41 and the second dielectric layer 42 are stacked. The through-hole 43 includes a first hole segment 411 and a second hole segment 421. The first hole segment 411 is disposed on the first dielectric layer 41, and the second hole segment 421 is disposed on the second dielectric layer 42. The second hole segment 421 and the first hole segment 411 are coaxially arranged to allow communication between the first receiving cavity 211 and the second receiving cavity 221 through the through-hole 43.

[0045] Please see Figure 2 and Figure 4 , Figure 2 The Y-axis direction in the figure represents the thickness direction of the first dielectric layer 41 and the second dielectric layer 42. In some embodiments, the thickness of the first dielectric layer 41 is 1.2 to 1.6 mm. Preferably, the thickness of the first dielectric layer 41 is 1.4 mm to give the first reflective surface a better reflective effect.

[0046] Please see Figure 2 and Figure 4 In some embodiments, the thickness of the second dielectric layer 42 is 1.0 to 1.2 mm. Preferably, the thickness of the second dielectric layer 42 is 1.15 mm to give the first reflective surface a better reflective effect.

[0047] Please see Figure 2In some embodiments, the radius of the first aperture segment 411 is 0.85–1.44 mm to give the first reflective surface a better reflective effect. The radius of the first aperture segment 411 is preferably 1 mm.

[0048] Please see Figure 2 In some embodiments, the radius of the second aperture segment 421 is 1.7 to 2.3 mm to give the first reflective surface a better reflective effect. The radius of the second aperture segment 421 is preferably 2 mm.

[0049] Please see Figure 5 , Figure 5 This is the S-parameter plot of the combined antenna 100 operating at low frequencies. Figure 4 It can be seen that when the S-parameter is -10, the operating frequency band of the combined antenna 100 is 2.25 to 3 GHz, which allows the combined antenna 100 to cover the N38, N40 and N41 frequency bands of 5G.

[0050] Please see Figure 6 , Figure 6 This is the E-plane radiation pattern of the combined antenna 100 when it operates at low frequencies. Figure 5 In the diagram, S1 is the dominant polarization, and S2 is the cross-polarization. Figure 5 It can be seen that in the 0-degree direction, the main polarization is more than 20dB greater than the cross polarization, indicating that the combined antenna 100 can be applied in the field of communication.

[0051] Please see Figure 7 , Figure 7 This is the H-plane radiation pattern of the combined antenna 100 when it operates at low frequencies. Figure 6 In the middle, S3 is the dominant polarization, and the cross-polarization contracts at the center. Figure 6 It can be seen that in the 0-degree direction, the main polarization is more than 20dB greater than the cross polarization, indicating that the combined antenna 100 can be applied in the field of communication.

[0052] Please see Figure 8 , Figure 8 This is the S-parameter diagram of the combined antenna 100 operating in the millimeter-wave band. Figure 4 It can be seen that the operating frequency band of the combined antenna 100 is 23-29.5GHz, which allows the combined antenna 100 to cover the N257 and N258 frequency bands of 5G. Moreover, the antenna has a gain of more than 10dB across the entire frequency band, indicating that the combined antenna 100 is a typical high-gain antenna.

[0053] Please see Figure 9 , Figure 9 This is the E-plane radiation pattern of the combined antenna 100 operating at 28 GHz. Figure 7 In the middle, S4 is the dominant polarization, and the cross-polarization contracts at the center. Figure 7It can be seen that in the 0-degree direction, the main polarization is more than 30dB greater than the cross polarization, indicating that the combined antenna 100 can be applied in the field of communication.

[0054] Please see Figure 10 , Figure 10 This is the H-plane radiation pattern of the combined antenna 100 operating at 28 GHz. Figure 7 In the diagram, S5 is the dominant polarization, and S6 is the cross-polarization. Figure 8 It can be seen that in the 0-degree direction, the main polarization is more than 30dB greater than the cross polarization, indicating that the combined antenna 100 can be applied in the field of communication.

[0055] In summary, the present invention provides a combined antenna 100, which includes a circuit board 1, a resonator 2, a radiating patch 3, and a dielectric assembly 4. The surface of the circuit board 1 is provided with a slot 11 for coupling via a microstrip slot 11. After the antenna is fed, electromagnetic wave energy is coupled and conducted to the resonator 2 through the slot 11. The resonator 2 includes a first portion 21 and a second portion 22. The first portion 21 is located on one side of the circuit board 1 and has a first receiving cavity 211. One end of the first portion 21 is connected to the circuit board 1 to seal one end of the receiving cavity. The second portion 22 is located on the side of the first portion 21 facing away from the circuit board 1, and the second portion 22 and the first portion 21 are spaced apart. The second portion 22 has a second receiving cavity 221, which is located on one side of the first receiving cavity 211. The radiating patch 3 is received within the first receiving cavity 211 and is connected to the circuit board 1. The dielectric component 4 is generally plate-shaped and is disposed between the first part 21 and the second part 22. One end of the dielectric component 4 is connected to the first part 21, and the other end is connected to the second part 22. The dielectric component 4 is disposed in a through-hole 43, which connects the first receiving cavity 211 and the second receiving cavity 221. The circuit board 1 and the resonator 2 together form the dielectric resonator 2 antenna, which is used to receive 5G low-frequency signals. The dielectric component 4 and the circuit board 1 together form the FP resonant cavity antenna. After the antenna is fed, electromagnetic wave energy is coupled and conducted through the slot 11 to the radiating patch 3, and then to the FP resonant cavity antenna. The radiating patch 3 is equivalent to a source antenna, and the circuit board 1 is equivalent to an ideal antenna. The dielectric component 4 forms a first reflecting surface, and the circuit board 1 forms a second reflecting surface. When the FP resonant cavity antenna is excited, the electromagnetic wave bounces back and forth between the first and second reflecting surfaces and propagates outwards from the cavity. The combined antenna 100 integrates two antennas with different operating frequencies, and the radiating patch 3 is housed in the first receiving cavity 211, realizing that the FP resonant cavity antenna and the dielectric resonator 2 antenna have the same aperture, which makes the combined antenna 100 have the advantages of compact size, low weight and high aperture efficiency.

[0056] The present invention also provides an electronic device (not shown), which includes the above-mentioned combined antenna 100. Since the combined antenna 100 has the advantages of compact size, low weight and high aperture efficiency, it can reduce the space occupied by the combined antenna 100 in the electronic device and reduce the weight of the antenna, making the electronic device smaller and lighter.

[0057] It should be noted that while the preferred embodiments of the present invention are given in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A combined antenna, characterized by The combination antenna comprises: a circuit board provided with a slot for microstrip slot coupling; a resonator comprising a first part and a second part, the first part being provided with a first receiving cavity, one end of the first part being connected to the circuit board to close one end of the first receiving cavity, the second part being arranged on the side of the first part away from the circuit board, the second part being spaced apart from the first part, the second part being provided with a second receiving cavity; a radiation patch accommodated in the first receiving cavity and connected to the circuit board; a dielectric assembly arranged between the first part and the second part, two ends of the dielectric assembly being connected to the first part and the second part respectively, the dielectric assembly being provided with a through hole, the through hole being in communication with the first receiving cavity and the second receiving cavity; wherein the circuit board and the resonator together form a dielectric resonator antenna, the dielectric resonator antenna being used for receiving a 5G low-frequency signal; the dielectric assembly and the circuit board together form an FP resonant cavity antenna, the dielectric assembly forming a first reflecting surface, the circuit board forming a second reflecting surface, the FP resonant cavity antenna being used for receiving a millimeter wave signal.

2. The combination antenna of claim 1, wherein, The working wavelength of the FP resonant cavity antenna is λ1, the distance between the circuit board and the dielectric assembly is h, and the h satisfies: h = 0.5λ1.

3. The combination antenna of claim 1, wherein, The dielectric assembly comprises a first dielectric layer and a second dielectric layer, two ends of the second dielectric layer being connected to the first part and the first dielectric layer respectively, the first dielectric layer and the second dielectric layer being stacked; the through hole comprises a first hole section and a second hole section, the first hole section being arranged in the first dielectric layer, the second hole section being arranged in the second dielectric layer, the second hole section and the first hole section being coaxially arranged.

4. The combination antenna of claim 3, wherein, The thickness of the first dielectric layer is 1.2-1.6 mm.

5. The combination antenna of claim 3, wherein, The thickness of the second dielectric layer is 1.0-1.2 mm.

6. The combination antenna of claim 3, wherein, The radius of the first hole section is 0.85-1.44 mm.

7. The combination antenna of claim 3, wherein, The radius of the first hole section is 1.7-2.3 mm.

8. The combination antenna of any of claims 1-7, wherein, The working frequency band of the combination antenna when working in a low-frequency band is 2.25-3 GHz.

9. The combination antenna of any of claims 1-7, wherein, The working frequency band of the combination antenna when working in a millimeter wave frequency band is 23-29.5 GHz.

10. An electronic device, comprising: The combination antenna comprises any one of claims 1-9.

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