Multi-frequency antenna and wireless communication device

Abstract

The invention provides a multi-frequency antenna. The multi-frequency antenna comprises a first substrate, a second substrate and a third substrate which are stacked in sequence, a micro-strip feeder line is formed on the third substrate; a slot with a preset shape is formed in the second substrate, and the slot partially corresponds to the microstrip feeder line; a patch antenna is formed on the first substrate, the patch antenna is arranged corresponding to the slot and the microstrip feeder line, and the patch antenna is used for coupling and feeding through the microstrip feeder line so as to radiate a wireless signal of a first preset frequency band; and the plurality of packaging antennas are arranged on the first substrate at preset intervals and are arranged around the periphery of the patch antenna at intervals, so that the antenna has relatively good communication stability.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a multi-frequency antenna and a wireless communication device. Background Art

[0002] With the development of wireless communication technology in recent years, wireless communication devices, such as vehicle-mounted wireless communication devices, receive satellite communication signals through installed satellite antennas, such as Global Navigation Satellite System (GNSS) antennas, to achieve functions such as vehicle positioning. However, traditional vehicle-mounted satellite antennas have low receiving sensitivity and are easily interfered by noise and noise. In certain environments, such as urban environments with complex signals, they are covered by noise and cause reception failure, resulting in adverse effects. Therefore, the design of vehicle-mounted satellite antennas still faces these important issues. Summary of the invention

[0003] In view of the above, it is necessary to provide a multi-frequency antenna and a wireless communication device having the multi-frequency antenna, so that the multi-frequency antenna can effectively reduce interference and noise and have better signal reception stability.

[0004] In the first aspect, an embodiment of the present application provides a multi-frequency antenna, comprising a first substrate, a second substrate and a third substrate stacked in sequence; a microstrip feed line is formed on the third substrate; a slot of a preset shape is opened on the second substrate, and the slot portion corresponds to the microstrip feed line; a patch antenna is formed on the first substrate, and the patch antenna is arranged corresponding to the slot and the microstrip feed line, and the patch antenna is used to couple and feed through the microstrip feed line to radiate wireless signals of a first preset frequency band; a plurality of packaged antennas, and the plurality of packaged antennas are arranged on the first substrate at preset intervals, and the intervals are arranged around the patch antenna.

[0005] The multi-frequency antenna is configured to feed current from a microstrip feed line through a slot to radiate wireless signals of a first preset frequency band, and multiple packaged antennas are configured to be spaced around the patch antenna to effectively reduce the impact of noise and electromagnetic wave interference on the patch antenna, so that the multi-frequency antenna can have better reception stability.

[0006] In some embodiments, the preset interval is one quarter of the wavelength of the first preset frequency band, and the height of each packaged antenna is one eighth of the wavelength of the first preset frequency band.

[0007] In some embodiments, the preset shape of the slot hole is H-shaped, including a transverse axis hole and two longitudinal axis holes, and the transverse axis hole is vertically connected between the two longitudinal axis holes.

[0008] In some embodiments, the length of the transverse axis hole is one-quarter wavelength of the first preset frequency band, and the transverse axis hole is coupled and fed from a microstrip feed line to radiate wireless signals of a second preset frequency band; the length of each longitudinal axis hole is one-eighth wavelength of the first preset frequency band, and the two longitudinal axis holes are coupled and fed from a microstrip feed line to radiate wireless signals of a third preset frequency band, and the second preset frequency band is smaller than the third preset frequency band.

[0009] In some embodiments, a pair of diagonal corners of the patch antenna are respectively provided with a cross-section, so that the wireless signal radiated by the patch antenna has a preset phase difference.

[0010] In some embodiments, the first substrate includes a first base film layer and a first metal layer stacked together, the first metal layer is formed into a patch antenna through a first manufacturing process, and the patch antenna is formed on the first base film layer.

[0011] In some embodiments, the second substrate includes a stacked second base film layer and a second metal layer, the second metal layer is formed with slots through a first manufacturing process, and the second metal layer is disposed on a surface of the first base film layer away from the patch antenna.

[0012] In some embodiments, the third substrate includes a stacked third base membrane layer and a third metal layer, the third metal layer is formed into a microstrip feed line through a second manufacturing process, and the microstrip feed line is arranged on a surface of the second base membrane layer away from the slot.

[0013] In some embodiments, the multi-frequency antenna also includes a fourth substrate, which includes a fourth base membrane layer and a fourth metal layer stacked thereon. The fourth base membrane layer is arranged on a surface of the third base membrane layer away from the microstrip feed line. The microstrip feed line also passes through the third base membrane layer and the fourth base membrane layer and is connected to the fourth metal layer. The fourth metal layer is used to provide a ground plane for the multi-frequency antenna.

[0014] In a second aspect, an embodiment of the present application provides a wireless communication device, comprising the multi-frequency antenna of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a multi-frequency antenna provided in a preferred embodiment of the present application.

[0016] Figure 2 for Figure 1 The three-dimensional structural schematic diagram of the multi-frequency antenna shown.

[0017] Figure 3 for Figure 2 A plan view of the multi-frequency antenna shown.

[0018] Figure 4 for Figure 1 A schematic diagram of the manufacturing process of the first substrate of the multi-band antenna is shown.

[0019] Figure 5for Figure 1 A schematic diagram of the manufacturing process of the second substrate of the multi-band antenna is shown.

[0020] Figure 6 for Figure 1 A schematic diagram of the manufacturing process of the third substrate and the fourth substrate of the multi-band antenna is shown.

[0021] Figure 7 for Figure 1 A schematic diagram of the manufacturing process of the first substrate to the fourth substrate of the multi-band antenna is shown.

[0022] Figure 8 for Figure 1 The schematic diagram of the manufacturing process of the first substrate to the fourth substrate and the packaged antenna of the multi-band antenna is shown.

[0023] Fig. 9 A curve diagram of the return loss of the multi-frequency antenna provided in the preferred embodiment of the present application.

[0024] Fig.10 This is an electromagnetic interference curve diagram of the multi-frequency antenna provided in the preferred embodiment of the present application.

[0025] Main component symbols

[0026]

[0027] DETAILED DESCRIPTION

[0028] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, words such as "exemplary", "or", "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "or", "for example" is intended to present related concepts in a concrete way.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field in this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. It should be understood that, unless otherwise specified in this application, " / " means or. For example, A / B can represent A or B. "And / or" in this application is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. "At least one" means one or more. "Multiple" means two or more than two. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, a, b and c seven situations.

[0030] Figure 1 A schematic diagram of a multi-frequency antenna according to an embodiment of the present application is provided. The multi-frequency antenna 100 can be applied to a wireless communication device, such as a vehicle-mounted wireless positioning device, and can send and receive wireless communication signals of a preset frequency band to perform functions such as wireless communication positioning.

[0031] Please also read Figure 1 The multi-band antenna 100 includes a first substrate 10, a second substrate 20, a third substrate 30 and a fourth substrate 40 which are stacked in sequence.

[0032] The first substrate 10 is formed with a patch antenna 12. In some embodiments, the patch antenna 12 is formed on a surface of the first substrate 10.

[0033] The second substrate 20 is provided with a slot 22 of a preset shape, and the slot 22 is arranged corresponding to the patch antenna 12 .

[0034] The third substrate 30 is formed with a microstrip feed line 32. In some embodiments, one end of the microstrip feed line 32 corresponds to the slot 22, that is, the patch antenna 12 is arranged corresponding to the slot 22 and one end of the microstrip feed line 32; the other end of the microstrip feed line 32 extends to the edge of the third substrate 30. The microstrip feed line 32 can be used to feed current, and the patch antenna 12 can be used to couple and feed from the microstrip feed line 32 through the slot 22 to radiate wireless communication signals of a preset frequency band.

[0035] The multi-frequency antenna 100 further includes a fourth substrate 40. The fourth substrate 40 is formed with a ground plane 42, and the microstrip feed line 32 is connected to the ground plane 42. It can be understood that the microstrip feed line 32 can be connected to the ground plane 42 and further connected to the feeding port provided on the fourth substrate 40 to feed current.

[0036] Please also read Figure 2 and Figure 3The multi-frequency antenna 100 further includes a plurality of packaged antennas 50. The plurality of packaged antennas 50 are arranged on the first substrate 10 at preset intervals, and are arranged around the patch antenna 12 at intervals. In some embodiments, the plurality of packaged antennas 50 can be arranged in pairs, symmetrically arranged about the patch antenna 12, and arranged along the edge of the first substrate 10 at preset intervals and equidistantly, and around the patch antenna 12, which can be used to effectively reduce the influence of interference and noise on the patch antenna 12.

[0037] In some embodiments, the preset interval between every two adjacent packaged antennas 50 in the plurality of packaged antennas 50 may be one quarter wavelength of the preset frequency band radiated by the patch antenna 12, i.e., λ / 4; the height or thickness of each packaged antenna 50 may be one eighth wavelength of the preset frequency band radiated by the patch antenna 12, i.e., λ / 8. In some embodiments, the multi-frequency antenna 100 further includes fourteen packaged antennas 50, which are arranged along the edge of the first substrate 10 at preset intervals, wherein the first substrate 10 is roughly in the shape of a rectangular plate, and the fourteen packaged antennas 50 are arranged in groups of two to form a total of seven groups symmetrically, wherein four groups of packaged antennas 50 are arranged along two corresponding sides of the first substrate 10, and three groups of packaged antennas 50 are arranged along the other two corresponding sides of the first substrate 10, and two adjacent packaged antennas 50 on the same side are arranged at the preset interval, and two adjacent packaged antennas 50 on adjacent sides are also arranged at the preset interval.

[0038] The preset shape of the slot 22 may be, but is not limited to, an H-shape, including a transverse axis hole 222 and two longitudinal axis holes 224. The opposite ends of the transverse axis hole 222 are substantially vertically connected between the two longitudinal axis holes 224. One end of the microstrip feed line 32 is disposed corresponding to the transverse axis hole 222. In some embodiments, the slot 22 may form a slot antenna.

[0039] In some embodiments, the patch antenna 12 may be, but is not limited to, a Global Navigation Satellite System (GNSS) antenna. The packaged antenna 50 may be, but is not limited to, a millimeter wave packaged antenna (Antenna in Package, AiP). Multiple packaged antennas 50 form a millimeter wave array antenna that can be used to operate wireless communication signals in a specific frequency band.

[0040] In some embodiments, the microstrip feed line 32 can be fed with current through the feeding port, and the patch antenna 12 is coupled with the microstrip feed line 32 through the slot 22 to feed current, and the current is conducted in the patch antenna 12 to excite the first working mode to generate a radiation signal in the first radiation frequency band. In some embodiments, the first working mode can cover the GPS / GLONASS / Beidou mode, and the first radiation frequency band can include the 1100-1610MHz frequency band, and the center frequency is approximately 1500MHz, so that the patch antenna 12 can synchronously receive satellite signals in the GPS / GLONASS / Beidou frequency band to achieve satellite positioning function.

[0041] At the same time, the transverse axis hole 222 of the slot 22 is coupled to feed current from the microstrip feed line 32 to excite the second working mode to generate a radiation signal in the second radiation frequency band. The two longitudinal axis holes 224 of the slot 22 are coupled to feed current from the microstrip feed line 32 to excite the third working mode to generate a radiation signal in the third radiation frequency band. In some embodiments, the second working mode can be a low-frequency working mode, and the second radiation frequency band can include a 1100-1300 MHz frequency band; the third working mode can be a high-frequency working mode, and the third radiation frequency band can include 1500-1700 MHz.

[0042] In some embodiments, the length of the patch antenna 12 is approximately 55-73 millimeters (mm), the width is approximately 68-69 mm, and the height is approximately 25-50 micrometers (μm). Based on λ=C / F, where F is the first radiation frequency band (1100-1610 MHz) of the patch antenna 12, C is the speed of light C=3×10 8 m, the numerical range of the wavelength λ can be obtained, so that the setting sizes of multiple packaged antennas 50 can be set accordingly. For example, the preset interval between every two adjacent packaged antennas 50 can be a quarter of a wavelength, that is, λ / 4 is approximately 46-68mm; the height or thickness of each packaged antenna 50 can be one-eighth of a wavelength, that is, λ / 8 is approximately 23-34mm.

[0043] Fig. 9 for Figures 1 to 3 The return loss curve of the slot 22 of the multi-frequency antenna 100 when in operation is shown. Curve S91 is the return loss value of the horizontal axis hole 222 of the slot 22 when in operation, and curve S92 is the return loss value of the two vertical axis holes 224 of the slot 22. It can be understood that the multi-frequency antenna 100 can effectively increase the working bandwidth in the low-frequency and high-frequency radiation bands through the slot 22, and can have a larger radiation bandwidth.

[0044] The multiple packaged antennas 50 can operate in the ka band and the ku band when working, wherein the frequency range of the ka band is approximately 26.5-40 GHz, and the frequency range of the ku band is approximately 12-18 GHz. Thus, the multiple packaged antennas 50 can receive satellite communication signals in the ka band and the ku band. The height of the multiple packaged antennas 50 is one-quarter wavelength of the operating frequency band of the patch antenna 12, which can effectively reduce the impact of noise and electromagnetic wave interference on the patch antenna 12, so that the multi-frequency antenna 100 can have better signal reception stability. In addition, when the noise is too large and the patch antenna 12 is working abnormally, the multiple packaged antennas 50 can communicate with external wireless communication devices, such as communicating with low-orbit satellites, so that the patch antenna 12 and the multiple packaged antennas 50 can be adjusted bidirectionally.

[0045] In some embodiments, the patch antenna 12 is substantially in the shape of a rectangular sheet, and a pair of diagonal portions of the patch antenna 12 are respectively provided with a cross section 122 (see Figure 3 ), so that the wireless communication signal radiated by the patch antenna 12 has a preset phase difference to achieve a circular polarization effect. In some embodiments, the preset phase difference can be 90 degrees.

[0046] Fig.10 for Figures 1 to 3 The electromagnetic interference curve diagram of the multi-frequency antenna 100 during operation is shown. The multiple packaged antennas 50 act on the patch antenna 12 to reduce electromagnetic interference in multiple frequency bands.

[0047] Combine as follows Figures 4 to 8 The manufacturing process of the multi-band antenna 100 is described.

[0048] See also Figure 4 The first substrate 10 includes a first base film layer 102 and a first metal layer 104. The first metal layer 104 forms a patch antenna 12 on the first base film layer 102 through a first manufacturing process. In some embodiments, the first metal layer 104 forms a patch antenna 12 of a preset shape on the first base film layer 102 through processes such as lamination, exposure, etching, and stripping (DES), and the patch antenna 12 is exposed on the surface of the first base film layer 102.

[0049] See also Figure 5 The second substrate 20 includes a stacked second base film layer 202 and a second metal layer 204. The second metal layer 204 is formed with a slot 22 by a first manufacturing process. In some embodiments, the second metal layer 204 is formed with a slot 22 of a preset shape by lamination, exposure, etching, and stripping processes.

[0050] See also Figure 6, the third substrate 30 includes a stacked third base film layer 302 and a third metal layer 304. The fourth substrate 40 includes a stacked fourth base film layer 402 and a fourth metal layer 404. The third metal layer 304, the third base film layer 302, the fourth base film layer 402 and the fourth metal layer 404 are stacked in sequence. The third metal layer 304 forms a microstrip feed line 32 through the second manufacturing process, and the microstrip feed line 32 penetrates the third base film layer 302 and the fourth base film layer 402 to connect to the fourth metal layer 404. In some embodiments, the third metal layer 304 forms a via hole through laser, plugging paste, electroplating and other processes, and then forms a microstrip feed line 32 through lamination, exposure, etching and film stripping processes, and the microstrip feed line 32 penetrates the third base film layer 302 and the fourth base film layer 402 to connect to the fourth metal layer 404, and the fourth metal layer 404 forms a ground plane 42.

[0051] See also Figure 7 , by pressing and forming a first substrate 10, a second substrate 20, a third substrate 30 and a fourth substrate 40. Among them, the first metal layer 104, the first base film layer 102, the second metal layer 204, the second base film layer 202, the third metal layer 304, the third base film layer 302, the fourth base film layer 402 and the fourth metal layer 404 are stacked in sequence.

[0052] See also Figure 8 A plurality of packaged antennas 50 are mounted on the surface of the first substrate 10 by surface mounting technology / surface mounting technology (SMT), thereby completing the manufacture of the multi-frequency antenna 100 .

[0053] In some embodiments, the first base film layer 102, the second base film layer 202, the third base film layer 302 and the fourth base film layer 402 may be, but are not limited to, liquid crystal polymer (LCP) layers, which are composed of fully aromatic liquid crystal polyester polymer materials composed of rigid polymer chain structures. The first metal layer 104, the second metal layer 204, the third metal layer 304 and the fourth metal layer 404 may be, but are not limited to, copper foil layers.

[0054] The multi-frequency antenna 100 of the present application is provided with a patch antenna 12 that feeds current from a microstrip feeder 32 through a slot 22 to radiate wireless communication signals of a first preset frequency band, and feeds current from a microstrip feeder 32 through a slot 22 to radiate wireless communication signals of a second preset frequency band and a third preset frequency band, so that the multi-frequency antenna 100 can operate wireless communication signals of multiple frequency bands. In addition, by providing multiple packaged antennas 50 spaced around the patch antenna 12, the influence of noise and electromagnetic wave interference on the patch antenna 12 can be effectively reduced, so that the multi-frequency antenna 100 can have better signal reception stability, and is suitable for various types of vehicle-mounted positioning devices, and can stably send and receive wireless communication signals with satellites.

[0055] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, as long as they are within the scope of the essence and spirit of the present application, appropriate changes and modifications made to the above embodiments should fall within the scope of protection claimed in the present application.

Claims

1. A multi-frequency antenna, characterized in that: The multi-frequency antenna comprises a first substrate, a second substrate and a third substrate stacked in sequence; The third substrate is formed with a microstrip feed line; The second substrate is provided with a slot of a preset shape, and the slot portion corresponds to the microstrip feed line; A patch antenna is formed on the first substrate, the patch antenna is arranged corresponding to the slot and the microstrip feed line, and the patch antenna is used to couple and feed through the microstrip feed line to radiate a wireless signal of a first preset frequency band; A plurality of packaged antennas are arranged on the first substrate at preset intervals and are arranged around the patch antenna at intervals.

2. The multi-frequency antenna according to claim 1, characterized in that: The preset interval is one quarter of the wavelength of the first preset frequency band, and the height of each packaged antenna is one eighth of the wavelength of the first preset frequency band.

3. The multi-frequency antenna according to claim 1, characterized in that: The preset shape of the slot hole is H-shaped, including a transverse axis hole and two longitudinal axis holes, and the transverse axis hole is vertically connected between the two longitudinal axis holes.

4. The multi-frequency antenna according to claim 3, characterized in that: The length of the transverse axis hole is one quarter of the wavelength of the first preset frequency band, and the transverse axis hole is coupled and fed from the microstrip feed line to radiate wireless signals of a second preset frequency band; the length of each of the longitudinal axis holes is one eighth of the wavelength of the first preset frequency band, and the two longitudinal axis holes are coupled and fed from the microstrip feed line to radiate wireless signals of a third preset frequency band, and the second preset frequency band is smaller than the third preset frequency band.

5. The multi-frequency antenna according to claim 1, characterized in that: A pair of diagonal corners of the patch antenna are respectively provided with a cross section so that the wireless signal radiated by the patch antenna has a preset phase difference.

6. The multi-frequency antenna according to claim 1, characterized in that: The first substrate includes a first base film layer and a first metal layer stacked together. The first metal layer is formed into the patch antenna through a first manufacturing process. The patch antenna is formed on the first base film layer.

7. The multi-frequency antenna according to claim 6, characterized in that: The second substrate includes a second base film layer and a second metal layer stacked together, the second metal layer is formed with the slot through the first manufacturing process, and the second metal layer is arranged on a surface of the first base film layer away from the patch antenna.

8. The multi-frequency antenna according to claim 7, characterized in that: The third substrate includes a stacked third base membrane layer and a third metal layer. The third metal layer is formed into the microstrip feed line through a second manufacturing process. The microstrip feed line is arranged on a surface of the second base membrane layer away from the slot.

9. The multi-frequency antenna according to claim 8, characterized in that: The multi-frequency antenna also includes a fourth substrate, which includes a fourth base membrane layer and a fourth metal layer stacked thereon. The fourth base membrane layer is arranged on a surface of the third base membrane layer away from the microstrip feeder. The microstrip feeder also passes through the third base membrane layer and the fourth base membrane layer and is connected to the fourth metal layer. The fourth metal layer is used to provide a ground plane for the multi-frequency antenna.

10. A wireless communication device, characterized in that: The wireless communication device comprises the multi-frequency antenna according to any one of claims 1 to 9.

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