CN115954346A - Waveguide antenna module and preparation method thereof - Google Patents
Waveguide antenna module and preparation method thereof Download PDFInfo
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- CN115954346A CN115954346A CN202111171097.9A CN202111171097A CN115954346A CN 115954346 A CN115954346 A CN 115954346A CN 202111171097 A CN202111171097 A CN 202111171097A CN 115954346 A CN115954346 A CN 115954346A
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Abstract
The application provides a waveguide antenna module and a preparation method thereof, the waveguide antenna module comprises a substrate, a chip module arranged on the substrate, and a cavity antenna covered on the chip module, at least one signal input point is arranged on the substrate, the chip module comprises a plurality of chip groups, each chip group comprises at least one chip, each chip is covered with a chip heat conduction layer, the cavity antenna comprises a cavity antenna plate, and an antenna emission plate connected with the top surface of the cavity antenna plate, the bottom surface of the cavity antenna plate is provided with a plurality of chip avoidance areas corresponding to the chips one by one, and at least one signal conversion through hole, at least one signal emission hole is formed in the antenna emission plate, and all surfaces of the cavity antenna plate and all surfaces of the antenna emission plate are metalized. Therefore, the chip module is arranged inside the cavity antenna, the integration level of the waveguide antenna module is improved, the size of the waveguide antenna module can be greatly reduced, and the use requirement of a small space in terminal equipment is further met.
Description
Technical Field
The embodiment of the application relates to the technical field of high-frequency antenna manufacturing, in particular to a waveguide antenna module and a preparation method thereof.
Background
The built-in hardware of the terminal device mainly comprises a waveguide antenna module and other functional hardware, wherein the waveguide antenna module is a finished product obtained by packaging hardware such as a chip, a waveguide antenna and the like and is used for connecting a network. Nowadays, the requirement for miniaturization and high integration of terminal equipment is higher and higher, and especially with the arrival of 5G, more functional hardware needs to be integrated in the terminal equipment, so that the space left for the waveguide antenna module is smaller and smaller.
The stacked cross-sectional structure of the conventional waveguide antenna module is shown in fig. 1, and includes a substrate, a cavity antenna and a chip respectively disposed on two sides of the substrate, and a heat conducting layer covering the surface of the chip. Because cavity antenna and chip are located the base plate both sides respectively, consequently the whole volume of current waveguide antenna module is great, can't satisfy the user demand in little space.
Disclosure of Invention
The embodiment of the application provides a waveguide antenna module and a preparation method thereof, which can be used for solving the technical problems that the conventional waveguide antenna module has a large integral volume and cannot meet the use requirement of a small space.
In a first aspect, an embodiment of the present application provides a waveguide antenna module, including: the antenna comprises a substrate, a chip module and a cavity antenna;
the substrate is provided with at least one signal input point;
the chip module is arranged on the substrate and comprises a plurality of chip groups, each chip group comprises at least one chip, each chip is covered with a chip heat conduction layer, and each signal input point is connected with at least one chip in each chip group;
the cavity antenna comprises a cavity antenna plate and an antenna transmitting plate connected with the top surface of the cavity antenna plate;
the cavity antenna plate is covered on the substrate, a plurality of chip avoiding areas and at least one signal conversion through hole are formed in the bottom surface of the cavity antenna plate, the number, the size and the positions of the chip avoiding areas correspond to all chips one by one, the inner wall of each chip avoiding area is in contact with the corresponding chip heat conduction layer, the number, the size and the positions of the signal conversion through holes correspond to the signal input points, the signal conversion through holes are connected with the corresponding signal input points, and all the surfaces of the cavity antenna plate are metalized;
at least one signal transmitting hole is formed in the antenna transmitting plate, and all the surfaces of the antenna transmitting plate are metallized.
In an implementation manner of the first aspect, the number of the signal input points is greater than one, and the signal input points are linearly arranged and are independent of each other.
In an implementation manner of the first aspect, the number of the signal emitting holes is greater than one, and the plurality of signal emitting holes are arranged in an array, the number of the signal emitting holes in each row in the array is the same as the number of the signal input points, and the number of the signal emitting holes in each column is greater than or equal to the number of the signal input points.
In one implementation form of the first aspect, the signal emitting hole is rectangular, and the size of the signal emitting hole is determined by:
determining the output signal wavelength of the cavity antenna according to the target output signal frequency of the cavity antenna and the light velocity value in vacuum;
determining the length of the signal transmitting hole according to the wavelength of the output signal of the cavity antenna and a preset proportionality coefficient;
and determining the width of the signal transmitting hole according to the length of the signal transmitting hole and a preset width-length ratio.
In one implementation form of the first aspect, the number of signal input points is eight or sixteen.
In one implementation manner of the first aspect, the signal conversion through holes are connected with the corresponding signal input points in a welding mode.
In one implementation manner of the first aspect, the signal conversion through holes and the corresponding signal input points are connected by welding through a surface mounting technology.
In a second aspect, an embodiment of the present application provides a method for manufacturing a waveguide antenna module, where the method is applied to manufacture the waveguide antenna module in the first aspect and in various implementation manners, and the method includes:
arranging at least one signal input point on a substrate;
attaching a chip module to the substrate, wherein the chip module comprises a plurality of chip groups, each chip group comprises at least one chip, and each signal input point is connected with at least one chip in each chip group;
covering a chip heat conduction layer on each chip;
according to the number, the size and the position of the chips, a plurality of chip avoidance areas corresponding to the chips one to one are formed in the bottom surface of the cavity antenna plate;
according to the number, the size and the position of the signal input points, signal conversion through holes corresponding to the signal input points are formed in the cavity antenna board;
performing metallization treatment on all surfaces of the cavity antenna plate;
at least one signal transmitting hole is formed in the antenna transmitting plate;
performing metallization treatment on all surfaces of the antenna emission plate;
connecting the antenna transmitting plate with the top surface of the cavity antenna plate to obtain a cavity antenna;
and covering the bottom surface of the cavity antenna board on the substrate, so that the inner wall of the chip avoiding area is contacted with the corresponding chip heat conduction layer, and thus the waveguide antenna module is obtained.
In one implementation form of the second aspect, the cavity antenna board is a high heat dissipation plastic cavity antenna board.
In an implementation manner of the second aspect, the number of the signal input points is greater than one, and the plurality of signal input points are arranged in a straight line and are independent of each other.
In an implementation manner of the second aspect, the number of the signal emitting holes is greater than one, and the plurality of signal emitting holes are arranged in an array, the number of the signal emitting holes in each row in the array is the same as the number of the signal input points, and the number of the signal emitting holes in each column is greater than or equal to the number of the signal input points.
In one implementation form of the second aspect, the signal emitting aperture is rectangular, and the size of the signal emitting aperture is determined by:
determining the output signal wavelength of the cavity antenna according to the target output signal frequency of the cavity antenna and the light velocity value in vacuum;
determining the length of the signal transmitting hole according to the wavelength of the output signal of the cavity antenna and a preset proportionality coefficient;
and determining the width of the signal transmitting hole according to the length of the signal transmitting hole and a preset width-length ratio.
In one implementation form of the second aspect, the number of signal input points is eight or sixteen.
In one implementation manner of the second aspect, the signal conversion through holes are connected with corresponding signal input points in a welding mode.
In one implementation manner of the second aspect, the signal conversion through holes and the corresponding signal input points are connected by welding through a surface mounting technology.
The embodiment of the application provides a waveguide antenna module and a preparation method thereof, the waveguide antenna module comprises a substrate, a chip module arranged on the substrate, and a cavity antenna covered on the chip module, at least one signal input point is arranged on the substrate, the chip module comprises a plurality of chip groups, each chip group comprises at least one chip, each chip is covered with a chip heat conduction layer, the cavity antenna comprises a cavity antenna plate, and an antenna emission plate connected with the top surface of the cavity antenna plate, a plurality of chip avoiding areas corresponding to the chips one to one are arranged on the bottom surface of the cavity antenna plate, at least one signal conversion through hole is formed in the antenna emission plate, at least one signal emission hole is formed in all surfaces of the cavity antenna plate and all surfaces of the antenna emission plate are metalized. Therefore, the chip module is arranged inside the cavity antenna, the integration level of the waveguide antenna module is improved, the size of the waveguide antenna module can be greatly reduced, and the use requirement of a small space in terminal equipment is further met.
Drawings
Fig. 1 is a schematic diagram of a stacked structure of a conventional waveguide antenna module;
fig. 2 is an exploded view of an angle of a waveguide antenna module according to a first embodiment of the present application;
fig. 3 is an exploded view of another angle of a waveguide antenna module according to the first embodiment of the present application;
fig. 4 is a schematic cross-sectional view of a waveguide antenna module according to a first embodiment of the present disclosure;
fig. 5 is a schematic front view of a signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure;
fig. 6 is a schematic perspective view of a signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure;
fig. 7 is a schematic front view of another signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure;
fig. 8 is a schematic perspective view of another signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure;
fig. 9 is a schematic diagram illustrating a signal transmission process in a waveguide antenna module according to a first embodiment of the present application;
fig. 10 is a schematic overall flowchart illustrating a manufacturing method of a waveguide antenna module according to a second embodiment of the present application.
In fig. 2 to 4:
100 is a substrate, 110 is a signal input point, 120 is a chip connecting line, 130 is a grounding point, 200 is a chip module, 210 is a chip group, 211 is a chip, 220 is a chip heat-conducting layer, 300 is a cavity antenna, 310 is a cavity antenna plate, 311 is a chip avoiding area, 312 is a signal conversion through hole, 320 is an antenna transmitting plate, and 321 is a signal transmitting hole.
Detailed Description
To make the objects, technical solutions and advantages of the present application clearer, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one," one or more "means one, two or more," and "a plurality" means two or more. The term "and/or" is used to describe the association relationship of the associated objects, and means that there may be three relationships; for example, a and/or B, may represent: a exists singly, A and B exist simultaneously, and B exists singly, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The first embodiment of the present application discloses a waveguide antenna module, and the following specifically describes the waveguide antenna module disclosed in the first embodiment of the present application with reference to the accompanying drawings.
Fig. 2 is an exploded view of a waveguide antenna module according to a first embodiment of the present disclosure, fig. 3 is an exploded view of another waveguide antenna module according to the first embodiment of the present disclosure, and fig. 4 is a schematic cross-sectional structure view of a waveguide antenna module according to the first embodiment of the present disclosure, as shown in fig. 2, fig. 3 and fig. 4, the waveguide antenna module according to the first embodiment of the present disclosure includes: a substrate 100, a chip module 200 and a cavity antenna 300.
The substrate 100 is provided with at least one signal input point 110.
Specifically, the number of the signal input points 110 is one or more. When the number of the signal input points 110 is more than one, the signal input points 110 are linearly arranged, and the signal input points 110 are independent and not connected to each other.
Preferably, the number of signal input points 110 is eight or sixteen.
The chip module 200 is disposed on the substrate 100, the chip module 200 includes a plurality of chip groups 210, each chip group 210 includes at least one chip 211, each chip 211 is covered with a chip heat conduction layer 220, and each signal input point 110 is connected to at least one chip 211 in each chip group 210.
Thus, the heat conduction layer of the chip can enhance the heat conduction of the chip module 200, and further dissipate the heat in the chip module in time.
Specifically, the plurality of chipsets 210 are connected in series, and each of the chipsets 210 in the plurality of chipsets 210 has a different function.
The function of each chipset 210 may be determined according to the needs and practical situations, and is not limited in particular.
Illustratively, the plurality of chipsets 210 may be a PD (Photo diode) chipset, a PND (Portable Navigation Devices) chipset, and an RFIC (Radio Frequency Interface Chip) chipset. The PD chip group comprises at least one PD chip (the PD chip is a photonic device and can convert optical signals into electrical signals to realize photoelectric conversion), the PND chip group comprises at least one PND chip (the PND chip is one of automatic navigation chips and has the function of networking automatic navigation), and the RFIC chip group comprises at least one RFIC chip (the RFIC chip is one of radio frequency chips and can convert radio signal communication into certain radio signal waveforms and send the radio signal waveforms).
The chip 211 and the signal input point 110 may be connected by a chip connection line 120.
Since each signal input point 110 is independent and any one of the chip sets 210 cannot be lacked for normal operation of the chip module 200, each signal input point 110 should be connected to at least one chip 211 in each chip set 210.
In order to more clearly illustrate the connection manner of the signal input point 110 and the chip 211 in each chipset 210, two specific examples are described below.
Example one: the number of the signal input points 110 is eight, the number of the PD chips is two, the number of the PND chips is one, and the number of the RFIC chips is one.
Two PD chips may be symmetrically disposed on two sides of the eight signal input points 110, and one PD chip on each side only needs to be connected to the four signal input points 110 through four chip connection lines 120, and one RFIC chip is connected to the eight signal input points 110 through the eight chip connection lines 120, and similarly, one PND chip is also connected to the eight signal input points 110 through the eight chip connection lines 120.
Further, the PD chipset, the PND chipset, and the RFIC chipset are connected in series, and the connection sequence is: first, four chip connection lines 120 are respectively connected out from two PD chips, and are merged into eight chip connection lines 120 to be connected to the PND chip, eight chip connection lines 120 are also connected between the PND chip and the RFIC chip, and finally, the RFIC chip is respectively connected to eight signal input points 110 through the eight chip connection lines 120.
By adopting the connection mode, the eight signal input points 110 can be effectively ensured to be independent from each other, and the signals are not interfered with each other.
Example two: the number of the signal input points 110 is sixteen, the number of the PD chips is four, the number of the PND chips is two, and the number of the RFIC chips is two.
The four PD chips may be symmetrically disposed at two sides of the sixteen signal input points 110, two PD chips at each side only need to be respectively connected to the eight signal input points 110 through eight chip connection lines 120, two RFIC chips are symmetrically disposed at two sides of the sixteen signal input points 110, one RFIC chip at each side is respectively connected to the eight signal input points 110 through the eight chip connection lines 120, and similarly, two PND chips are symmetrically disposed at two sides of the sixteen signal input points 110, and one PND chip at each side is also respectively connected to the eight signal input points 110 through the eight chip connection lines 120.
Further, on two sides of the sixteen signal input points, the PD chipset, the PND chipset, and the RFIC chipset are all in a serial relationship, and the connection sequence on each side is: first, four chip connection lines 120 are respectively connected out from four PD chips, and are merged into eight chip connection lines 120 to be connected to the PND chip, eight chip connection lines 120 are also connected between the PND chip and the RFIC chip, and finally, the RFIC chip is respectively connected to eight signal input points 110 through the eight chip connection lines 120.
By adopting the connection mode, sixteen signal input points 110 can be effectively ensured to be independent from each other, and signals are not interfered with each other.
The cavity antenna 300 includes a cavity antenna plate 310, and an antenna radiation plate 320 connected to a top surface of the cavity antenna plate 310.
Specifically, there are many connection methods between the cavity antenna board 310 and the antenna radiation board 320, in one example, the cavity antenna board 310 and the antenna radiation board 320 may be connected by welding through a surface assembly technique, and in other possible examples, a person skilled in the art may determine a connection method between the cavity antenna board 310 and the antenna radiation board 320 according to experience and practical situations, such as an ultrasonic connection, a lock screw connection, a normal welding, a snap connection, and the like, which is not limited specifically.
The cavity antenna plate 310 covers the substrate 100, a plurality of chip avoiding regions 311 and at least one signal conversion through hole 312 are formed in the bottom surface of the cavity antenna plate 310, the number, size and position of the chip avoiding regions 311 correspond to all chips 211 one by one, the inner wall of each chip avoiding region 311 is in contact with the corresponding chip heat conduction layer 220, the number, size and position of the signal conversion through holes 312 correspond to the signal input points 110, the signal conversion through holes 312 are connected with the corresponding signal input points 110, and all surfaces of the cavity antenna plate 310 are metalized.
Specifically, the number of the plurality of chip avoiding regions 311 is the same as the number of all the chips 211, and each chip avoiding region 311 is matched with the size and the position of the corresponding chip 211.
The number of signal conversion vias 312 is the same as the number of signal input points 110, and each signal conversion via 312 matches the size and corresponds to the position of the corresponding signal input point 110.
Illustratively, when the number of the signal input points 110 is eight, the number of the signal converting through holes 312 is also eight, and the eight signal converting through holes 312 are arranged in a straight line; when the number of the signal input points 110 is sixteen, the number of the signal converting vias 312 is sixteen, and the sixteen signal converting vias 312 are arranged in a straight line.
The signal conversion via 312 is connected to the corresponding signal input point 110 in various ways, in one example, the signal conversion via 312 is connected to the corresponding signal input point 110 by soldering, and further, the signal conversion via 312 is connected to the corresponding signal input point 110 by soldering through a surface mounting technology. In other possible examples, a person skilled in the art may determine the connection manner of the signal conversion via 312 and the corresponding signal input point 110 according to needs and practical situations, and is not limited in particular.
Alternatively, the metallization process performed on all surfaces of the cavity antenna board 310 may be a metal plating surface treatment process or an anodic oxidation surface treatment process, which is not limited in particular.
The antenna radiation plate 320 is provided with at least one signal radiation hole 321, and all surfaces of the antenna radiation plate 320 are metallized.
Specifically, the metallization process performed on all surfaces of the antenna radiation plate 320 may be a metal plating surface treatment process or an anodic oxidation surface treatment process, and is not limited in particular.
Therefore, by adopting the cavity antenna provided in the first embodiment of the application, all surfaces of the cavity antenna board and the antenna transmitting board are metallized, so that the heat conductivity of the waveguide antenna module can be enhanced, the heat conduction layer is matched with the chip, the heat dissipation of the waveguide antenna module is more facilitated, and in addition, the problem of serious electromagnetic compatibility caused when the chip module is directly placed inside the cavity antenna can be solved.
The serious electromagnetic compatibility problem interferes with the signal input, conversion and output of the waveguide antenna module, and further causes the waveguide antenna module to be incapable of being used normally, and the cavity antenna 300 provided in the first embodiment of the present application can solve the electromagnetic compatibility problem, and is specifically designed based on the following principle:
the Faraday Cage (Cage) structure is usually adopted to solve the electromagnetic compatibility problem, the Faraday Cage is a Cage formed by metal or good conductor, and is a device for demonstrating the principles of equipotential, electrostatic shielding and high-voltage live operation named by the name of the founder of electromagnetism and the name of michael-Faraday of the british physicist. The cage body of the Faraday cage is communicated with the ground, and according to the static balance condition of the grounding conductor, the cage body is an equivalent body, the internal potential difference is zero, the electric field is zero, and the electromagnetic compatibility problem does not exist.
Based on the above principle, in the embodiment of the present application, the surface metallization processing is performed on the cavity antenna 300, and the grounding points 130 are disposed on the two sides of the signal input point 110 on the substrate 100, the cavity antenna 300 after the surface metallization processing forms a faraday cage, and the cage body of the faraday cage is the outer shell of the cavity antenna 300, and when the cavity antenna 300 is connected to the substrate 100, the cavity antenna 300 is grounded through the grounding points 130, so that the electromagnetic compatibility problem in the present application can be solved.
The number of the signal transmission holes 321 may be one or more than one.
Preferably, when the number of the signal input points is more than one, the number of the signal emitting holes 321 is more than one, and the plurality of signal emitting holes 321 are arranged in an array, and the number of the signal emitting holes 321 in each row in the array is the same as the number of the signal input points 110; the number of the signal transmitting holes 321 in each row is greater than or equal to the number of the signal input points 110, when the number of the signal transmitting holes 321 in each row is equal to the number of the signal input points 110, the waveguide antenna emits a general signal, and when the number of the signal transmitting holes 321 in each row is greater than the number of the signal input points 110, the signal emitted by the waveguide antenna module can obtain a gain effect. Exemplarily, fig. 5 is a schematic front view structure diagram of a signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure, and fig. 6 is a schematic perspective structure diagram of a signal transmitting hole in a waveguide antenna module according to a first embodiment of the present disclosure, as shown in fig. 5 and fig. 6, when the number of signal input points 110 is eight, the number of signal transmitting holes 321 per row is eight, and the number of signal transmitting holes 321 per column is greater than or equal to eight.
Further exemplarily, fig. 7 is a schematic front view structure diagram of another signal transmitting hole in the waveguide antenna module according to the first embodiment of the present disclosure, and fig. 8 is a schematic perspective structure diagram of another signal transmitting hole in the waveguide antenna module according to the first embodiment of the present disclosure, as shown in fig. 7 and fig. 8, when the number of the signal input points 110 is sixteen, the number of each column of the signal transmitting holes 321 is sixteen, and the number of each column of the signal transmitting holes 321 is greater than or equal to sixteen.
Preferably, eight to sixteen signal input points 110 and eight to sixteen rows of signal input holes 321 are adopted, and the frequency range of the emitted target output signal is 20-84GHz, so that on one hand, the basic requirement of popularizing 5G application in the fields of industry, science, medicine and the like can be met, on the other hand, the high-frequency signal has wider bandwidth and higher radio frequency, the accuracy of measuring distance and speed can be improved, and the deep requirement of 5G development can be met.
The signal transmission hole 321 is rectangular in shape, and the size of the signal transmission hole 321 may be determined by:
in the first step, the wavelength of the output signal of the cavity antenna 300 is determined according to the target output signal frequency of the cavity antenna 300 and the light velocity value in vacuum.
Further, the output signal wavelength of the cavity antenna 300 may be determined by the following equation (1):
λ = C/f formula (1)
In the formula (1), λ is the output signal wavelength of the cavity antenna 300, C is the light velocity value in vacuum, and f is the target output signal frequency of the cavity antenna 300.
Exemplarily, when the target output signal frequency of the cavity antenna 300 is 24GHz, λ = C/f = (3 × 10) 8 )/(24×10 9 ) =12.5mm. λ = C/f = (3 × 10) when the target output signal frequency of the cavity antenna 300 is 77GHz 8 )/(77×10 9 )＝3.89mm。
Secondly, the length of the signal transmitting hole 321 is determined according to the wavelength of the output signal of the cavity antenna 300 and a preset proportionality coefficient.
Preferably, the preset scaling factor may be 2.
Illustratively, when the target output signal frequency of the cavity antenna 300 is 24GHz, the length L = λ/2=6.25mm of the signal transmission hole 321; when the target output signal frequency of the cavity antenna 300 is 77GHz, the length L = λ/2=1.98mm of the signal transmission hole 321.
Thirdly, the width of the signal transmitting hole 321 is determined according to the length of the signal transmitting hole 321 and a preset width-to-length ratio.
Preferably, the preset width-to-length ratio may be 0.6.
Illustratively, when the target output signal frequency of the cavity antenna 300 is 24GHz, the width W =0.6 × l =3.75mm of the signal transmitting aperture 321; when the signal output by the waveguide antenna module is 77GHz, the width W =0.6 × l =1.18mm of the signal transmission hole 321.
It should be noted that, in the actual preparation process, because there is certain difficulty in the processing of rectangular hole, consequently, can carry out the radius angle according to actual demand and handle, further finely tune the trompil size of signal transmission hole 321 to satisfy the user demand.
A signal transmission process in the waveguide antenna module according to the first embodiment of the present application will be described below with reference to the accompanying drawings.
Fig. 9 schematically illustrates a signal transmission process in the waveguide antenna module according to the first embodiment of the present application, and as shown in fig. 9, the signal transmission process of the waveguide antenna module is as follows: after the substrate 100 is powered on, electromagnetic signals are transmitted to the signal input point 110 in the middle of the substrate 100 through the chip connecting line 120, the signal input point 110 introduces signals and conducts the signals to the cavity antenna board 310, the wavelength of the signals is converted to millimeter level through the signal conversion through hole 312 arranged in the cavity antenna board 310, and finally the signals are transmitted out through the signal transmitting hole 321 arranged in the antenna transmitting board 320.
Corresponding to the waveguide antenna module provided in the first embodiment of the present application, a second embodiment of the present application provides a method for manufacturing a waveguide antenna module.
Fig. 10 schematically shows an overall flowchart corresponding to a method for manufacturing a waveguide antenna module according to a second embodiment of the present application, and as shown in fig. 10, the method specifically includes the following steps:
And 1004, according to the number, the size and the position of the chips, arranging a plurality of chip avoidance areas corresponding to the chips one by one on the bottom surface of the cavity antenna plate.
And 1005, forming signal conversion through holes corresponding to the signal input points on the cavity antenna board according to the number, the size and the positions of the signal input points.
Alternatively, the metallization treatment may employ an electroplated metal surface treatment process or an anodic oxidation surface treatment process.
And step 1009, connecting the antenna emission plate with the top surface of the cavity antenna plate to obtain the cavity antenna.
In one implementation, the cavity antenna plate is a high heat dissipation plastic cavity antenna plate.
Alternatively, the high heat dissipation plastic may be a high heat dissipation plastic such as polyetheretherketone plastic, polyetherimide plastic, or polyphenylene sulfide resin.
In addition, the cavity antenna board 310 may also be a high heat dissipation metal cavity antenna board.
Alternatively, the high heat dissipation metal may be a metal alloy material such as magnesium, aluminum, or copper.
In one implementation, the number of the signal input points is more than one, and the signal input points are linearly arranged and are independent of each other.
In an implementation manner, the number of the signal emitting holes is more than one, and the plurality of signal emitting holes are arranged in an array, and the number of the signal emitting holes in each row and the number of the signal emitting holes in each column in the array are the same as the number of the signal input points.
In one implementation, the signal emitting aperture is rectangular and the size of the signal emitting aperture is determined by:
and determining the wavelength of the output signal of the cavity antenna according to the target output signal frequency of the cavity antenna and the light velocity value in vacuum.
And determining the length of the signal transmitting hole according to the wavelength of the output signal of the cavity antenna and a preset proportionality coefficient.
And determining the width of the signal transmitting hole according to the length of the signal transmitting hole and a preset width-length ratio.
In one implementation, the number of signal input points is eight or sixteen.
In one implementation, the signal conversion through holes are connected with the corresponding signal input points in a welding mode.
In one implementation, the signal conversion through holes and the corresponding signal input points are connected by welding through a surface assembly technology.
The embodiment of the application provides a preparation method of a waveguide antenna module, the preparation method comprises the steps of arranging at least one signal input point 110 on a substrate 100, attaching a chip module to the substrate, wherein the chip module comprises a plurality of chip groups, each chip group comprises at least one chip, each signal input point is connected with at least one chip in each chip group, each chip is covered with a chip heat conduction layer, a plurality of chip avoidance areas corresponding to the chips one by one are arranged on the bottom surface of a cavity antenna plate according to the number, the size and the positions of the chips, signal conversion through holes corresponding to the signal input points are arranged on the cavity antenna plate according to the number, the size and the positions of the signal input points, all surfaces of the cavity antenna plate are metalized, at least one signal transmission hole is arranged on the antenna transmission plate, all surfaces of the antenna transmission plate are metalized, the antenna transmission plate is connected with the top surface of the cavity antenna plate, a cavity antenna is obtained, the bottom surface of the cavity antenna plate is covered on the substrate, so that the inner wall of each chip avoidance area is in contact with the corresponding chip, and the waveguide antenna module is obtained; therefore, the chip module is arranged inside the cavity antenna, the integration level of the waveguide antenna module is improved, the size of the waveguide antenna module can be greatly reduced, and the use requirement of a small space in terminal equipment is further met.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains; it is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims. It will be understood that the invention is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof; the scope of the invention is limited only by the appended claims.
Claims (10)
1. A waveguide antenna module, comprising: a substrate (100), a chip module (200) and a cavity antenna (300);
at least one signal input point (110) is arranged on the substrate (100);
the chip module (200) is arranged on the substrate (100), the chip module (200) comprises a plurality of chip groups (210), each chip group (210) comprises at least one chip (211), each chip (211) is covered with a chip heat conduction layer (220), and each signal input point (110) is connected with at least one chip (211) in each chip group (210);
the cavity antenna (300) comprises a cavity antenna plate (310) and an antenna transmitting plate (320) connected with the top surface of the cavity antenna plate (310);
the cavity antenna plate (310) is covered on the substrate (100), a plurality of chip avoiding regions (311) and at least one signal conversion through hole (312) are formed in the bottom surface of the cavity antenna plate (310), the number, the size and the positions of the chip avoiding regions (311) correspond to all chips (211) one by one, the inner wall of each chip avoiding region (311) is in contact with the corresponding chip heat conduction layer (220), the number, the size and the positions of the signal conversion through holes (312) correspond to the signal input points (110), the signal conversion through holes (312) are connected with the corresponding signal input points (110), and all surfaces of the cavity antenna plate (310) are metalized;
the antenna emitting plate (320) is provided with at least one signal emitting hole (321), and all surfaces of the antenna emitting plate (320) are subjected to metallization treatment.
2. The waveguide antenna module according to claim 1, wherein the number of the signal input points (110) is greater than one, and the plurality of signal input points (110) are arranged in a straight line, and the plurality of signal input points (110) are independent of each other.
3. The waveguide antenna module as claimed in claim 2, wherein the number of the signal transmitting holes (321) is greater than one, and the plurality of signal transmitting holes (321) are arranged in an array, the number of the signal transmitting holes (321) in each row of the array is the same as the number of the signal input points (110), and the number of the signal transmitting holes (321) in each column is greater than or equal to the number of the signal input points (110).
4. A waveguide antenna module according to claim 3, characterized in that the signal transmission aperture (321) is rectangular and the size of the signal transmission aperture (321) is determined by:
determining the output signal wavelength of the cavity antenna (300) according to the target output signal frequency of the cavity antenna (300) and the light speed value in vacuum;
determining the length of the signal transmitting hole (321) according to the wavelength of the output signal of the cavity antenna (300) and a preset proportionality coefficient;
and determining the width of the signal transmitting hole (321) according to the length of the signal transmitting hole (321) and a preset width-length ratio.
5. A waveguide antenna module according to claim 2, characterized in that the number of signal input points (110) is eight or sixteen.
6. The waveguide antenna module according to claim 1, wherein the signal transition vias (312) are soldered to the corresponding signal input points (110).
7. The waveguide antenna module as claimed in claim 6, wherein the signal conversion via (312) is soldered to the corresponding signal input point (110) by surface mount technology.
8. A method of manufacturing a waveguide antenna module, for manufacturing a waveguide antenna module according to any one of claims 1-7, the method comprising:
providing at least one signal input point (110) on a substrate (100);
-attaching a chip module (200) to the substrate (100), the chip module (200) comprising a plurality of chip sets (210), each chip set (210) comprising at least one chip (211), each signal input point (110) being connected to at least one chip (211) in each chip set (210);
covering a chip thermal conduction layer (220) on each chip (211);
according to the number, the size and the position of the chips (211), a plurality of chip avoiding areas (311) which are in one-to-one correspondence with the chips (211) are arranged on the bottom surface of the cavity antenna plate (310);
according to the number, the size and the position of the signal input points (110), signal conversion through holes (312) corresponding to the signal input points (110) are formed in the cavity antenna plate (310);
metalizing all surfaces of the cavity antenna plate (310);
at least one signal transmitting hole (321) is arranged on the antenna transmitting plate (320);
metallizing all surfaces of the antenna radiation plate (320);
connecting the antenna transmitting plate (320) with the top surface of the cavity antenna plate (310) to obtain a cavity antenna (300);
and covering the bottom surface of the cavity antenna plate (310) on the substrate (100), so that the inner wall of the chip avoiding region (311) is contacted with the corresponding chip heat conduction layer (220), and obtaining the waveguide antenna module.
9. The method of claim 8, wherein the cavity antenna plate (310) is a high heat dissipation plastic cavity antenna plate.
10. The method for manufacturing a waveguide antenna module according to claim 8, wherein the number of the signal input points (110) is more than one, and the signal input points (110) are arranged in a straight line, and the signal input points (110) are independent of each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111171097.9A CN115954346A (en) | 2021-10-08 | 2021-10-08 | Waveguide antenna module and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111171097.9A CN115954346A (en) | 2021-10-08 | 2021-10-08 | Waveguide antenna module and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559136A (en) * | 2024-01-12 | 2024-02-13 | 成都天锐星通科技有限公司 | Antenna terminal and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559136A (en) * | 2024-01-12 | 2024-02-13 | 成都天锐星通科技有限公司 | Antenna terminal and electronic equipment |
| CN117559136B (en) * | 2024-01-12 | 2024-04-02 | 成都天锐星通科技有限公司 | Antenna terminal and electronic equipment |
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