CN114883780A - Packaged antenna, radio device and electronic equipment - Google Patents

Packaged antenna, radio device and electronic equipment Download PDF

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Publication number
CN114883780A
CN114883780A CN202210575306.4A CN202210575306A CN114883780A CN 114883780 A CN114883780 A CN 114883780A CN 202210575306 A CN202210575306 A CN 202210575306A CN 114883780 A CN114883780 A CN 114883780A
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Prior art keywords
antenna
feeding
feed
slot structure
signal
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Inventor
庄凯杰
李珊
陈哲凡
黄雪娟
王典
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Calterah Semiconductor Technology Shanghai Co Ltd
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Calterah Semiconductor Technology Shanghai Co Ltd
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Priority to CN202210575306.4A priority Critical patent/CN114883780A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/106—Microstrip slot antennas

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The application discloses encapsulation antenna, radio device and electronic equipment, this encapsulation antenna includes: a slot structure and a feed structure; the feeding structure comprises a first feeding part and a second feeding part, and the first feeding part and the second feeding part are used for feeding the same gap structure; the slot structure comprises a long edge and a wide edge, wherein the size of the wide edge is larger than or equal to 0.15 times of that of the long edge, and the size of the wide edge is smaller than or equal to 0.3 times of that of the long edge. In the application, the first feed portion and the second feed portion are fed by the same slot structure, so that the bandwidth and the radiation efficiency of the antenna can be increased, and wide beam radiation is realized.

Description

Packaged antenna, radio device and electronic equipment
Technical Field
The present application relates to antenna technology, and in particular, to a packaged antenna, a radio device, and an electronic apparatus.
Background
In the information age of the day-by-day change of wireless communication technology, the commercial hot tide of 5G has been on the head. In order to make the 5G vision realistic, one of the core technologies is the antenna system packaging technology.
The technology of antenna system in package (AiP) inherits and develops the integration concept of microstrip antenna, multi-chip circuit module and tile-type phased-array structure, and particularly explores the integration of single or multiple Antennas on a chip package, so that the whole system package is suitable for being directly applied to wireless communication products.
However, the operating frequency band applied by the conventional system-in-package wireless is low, and the beam width is narrow, which limits the application of the package antenna.
Disclosure of Invention
The application provides a packaged antenna, a radio device and an electronic apparatus to achieve wide beam radiation.
The application provides a packaged antenna, including: a slot structure and a feed structure; the feeding structure comprises a first feeding part and a second feeding part, and the first feeding part and the second feeding part are used for feeding the same slot structure; the slit structure comprises a long side and a wide side, wherein the size of the wide side is larger than or equal to 0.15 times of the size of the long side, and the size of the wide side is smaller than or equal to 0.3 times of the size of the long side.
The present application also provides a radio device comprising:
a die for generating a radio frequency transmit signal and receiving a radio frequency receive signal;
a package structure including the packaged antenna as described above;
wherein the package antenna is connected with a pin of the die to convert the radio frequency transmission signal into a first radio signal or convert a second radio signal into the radio frequency reception signal.
The present application further provides an electronic device, which includes:
a radio device as described above;
and the data processing device is connected with the radio device and is used for processing the data of the digital signals transmitted and received by the radio device through the packaging antenna.
In this application, the packaged antenna includes a slot structure and a feed structure, and the feed structure includes a first feed portion and a second feed portion, and the first feed portion and the second feed portion feed for the same slot structure. In this application, the slot structure equivalence is a radiation source, and encapsulation antenna adopts feed structure to feed for the slot structure, and the broadside size of slot structure is greater than or equal to 0.15 times of long limit size, and the broadside size is less than or equal to 0.3 times of long limit size, and the shape of slot structure is approximate to the slit so, possesses less antenna aperture, can increase encapsulation antenna's bandwidth and radiant efficiency, realizes the wide beam radiation.
Drawings
To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present application, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present application, without making sure that these should be within the scope of the claims of the present application.
Fig. 1 is a schematic diagram of a packaged antenna provided in an embodiment of the present application;
fig. 2 is a top view of a first metal layer of the packaged antenna of fig. 1;
FIG. 3 is a top view of the second metal layer of the packaged antenna of FIG. 1
Fig. 4 is a schematic diagram of another packaged antenna provided in the embodiments of the present application;
fig. 5 is a schematic diagram of another packaged antenna provided in an embodiment of the present application;
fig. 6 is a schematic diagram of another packaged antenna provided in an embodiment of the present application;
fig. 7 is a top view of a second metal layer of the packaged antenna of fig. 6;
fig. 8 is a schematic diagram of another packaged antenna provided in an embodiment of the present application;
fig. 9 is a return loss-frequency graph of a packaged antenna provided by an embodiment of the present application;
fig. 10 is a graph of gain versus frequency for a packaged antenna provided by an embodiment of the present application.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below through embodiments with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be derived by one skilled in the art from the basic concepts disclosed and claimed herein are intended to be within the scope of the present disclosure.
AiP Antenna (Antenna-In-Package) is a Package that utilizes a redistribution layer In the chip Package to place the Antenna on the Package so that the chip has no external Antenna. The chip effectively reduces the overall size of the radio device containing the antenna. The millimeter wave radar sensor is one of radio devices. Related to the radiation principle, AiP antenna comprises a slot antenna. The slot antenna includes a radiating portion that radiates an electromagnetic wave using a slot of a metal layer in a package. Specifically, the electromagnetic wave is generated when the metal layer is fed with a high-frequency current by utilizing a current open circuit formed by the slit. Wherein the position, shape, direction, etc. of the slot affect the radiation pattern of the generated electromagnetic wave. Wherein, the radiation mode includes at least one of radiation direction, radiation range, beam deflection and the like. The shape of the slit is exemplified by a long strip. The long dimension of the slot is for example about half the wavelength of the guided wave in the medium. The dimension of the short side, i.e. the wide side, of the slot is much smaller than the dimension of the long side, for example, the dimension of the short side is about 0.1 times of the dimension of the long side, so that the radio frequency electric signal is excited to generate a magnetic field of a fundamental mode to radiate electromagnetic waves. Among other things, slot antennas are susceptible to generating electromagnetic waves of a relatively narrow frequency band under excitation by narrow-bandwidth, low-frequency electrical signals, limited by the size of the slot.
A radar sensor is a sensor that measures a physical quantity with a surrounding object by transmitting and receiving electromagnetic waves. Taking a millimeter wave radar sensor as an example, the sensor detects an object in the radiation range of an antenna by emitting a detection signal wave of a continuous frequency modulation wave (FWCM) in a preset band, and calculates a physical quantity (also referred to as measurement information) with the corresponding object by using an echo signal wave reflected by the received object. A millimeter wave radar sensor is taken as an example of an angle radar sensor of an automobile, wherein, on one hand, the electromagnetic wave of the radar sensor adopts an FWCM signal wave which has the characteristic of wider bandwidth, for example, the frequency band bandwidth is 77-81GHz, or 60-64GHz, etc.; on the other hand, the width of the radiation range required for the radar sensor is wide, which is characterized by a large beam range, for example, in the range of ± 45 °. For this reason, the existing single slot antenna has difficulty in satisfying the radiation index of the radar sensor. Therefore, a plurality of slot antennas or a series-fed antenna array using a patch structure is required to achieve the above radiation index. This increases the difficulty of integrating the antenna of the radar sensor on the chip package.
Therefore, the application provides a packaged antenna to adapt to a sensor to carry out accurate measurement by utilizing a broadband signal. Wherein the packaged antenna comprises: a slot structure and a feed structure; the feeding structure comprises a first feeding part and a second feeding part, and the first feeding part and the second feeding part are used for feeding the same slot structure; the slit structure comprises a long side and a wide side, wherein the size of the wide side is larger than or equal to 0.15 times of the size of the long side, and the size of the wide side is smaller than or equal to 0.3 times of the size of the long side.
Referring to fig. 1, a schematic diagram of a packaged antenna provided in an embodiment of the present application is shown, fig. 2 is a top view of a first metal layer of the packaged antenna shown in fig. 1, and fig. 3 is a top view of a second metal layer of the packaged antenna shown in fig. 1. Referring to fig. 1 to 3, the packaged antenna provided in this embodiment includes: the antenna comprises a first metal layer 10, a second metal layer 20, a third metal layer 30, a first dielectric layer 1 and a second dielectric layer 2, wherein the first metal layer 10, the second metal layer 20 and the third metal layer 30 are arranged in a stacking mode along a first direction Z, the first dielectric layer 1 is located between the first metal layer 10 and the second metal layer 20, the second dielectric layer 2 is located between the second metal layer 20 and the third metal layer 30, the first metal layer 10 comprises a gap structure 11 penetrating through the first metal layer 10 along the first direction Z, the second metal layer 20 comprises a feeding structure 21, and the third metal layer 30 is grounded; the feeding structure 21 comprises a first feeding portion 211 and a second feeding portion 212, and the first feeding portion 211 and the second feeding portion 212 are used for feeding the same slot structure 11; the slit structure 11 includes a long side and a wide side, the wide side dimension W is greater than or equal to 0.15 times the long side dimension L, and the wide side dimension W is less than or equal to 0.3 times the long side dimension L.
It will be appreciated that the dashed reference 21 in fig. 2 is essentially a projection of the feed structure 21 of the second metal layer 20 of fig. 3 onto the first metal layer 10 in the first direction Z; the dashed line 11 in fig. 3 is substantially a projection of the slot structure 11 of the first metal layer 10 of fig. 2 onto the second metal layer 20 along the first direction Z. The plane of each film layer is an X-Y plane, the first direction Z is perpendicular to the X-Y plane, the long side direction of the optional slit structure 11 is parallel to the X direction, and the wide side direction of the slit structure 11 is parallel to the Y direction.
In this embodiment, the structure of the packaged antenna from bottom to top sequentially includes a third metal layer 30, a second dielectric layer 2, a second metal layer 20, a first dielectric layer 1, and a first metal layer 10, where a direction from bottom to top is parallel to the first direction Z. The first dielectric layer 1 is disposed between the first metal layer 10 and the second metal layer 20 such that the first metal layer 10 and the second metal layer 20 are stacked and insulated. The package with the package antenna may also be provided with a third metal layer 30 and connected to a reference ground, depending on the design of the respective redistribution layers of the package. For this purpose, the second dielectric layer 2 is disposed between the second metal layer 20 and the third metal layer 30, such that the second metal layer 20 and the third metal layer 30 are stacked and insulated. It is to be understood that the structure of the packaged antenna is not limited thereto, and the packaged antenna film layer structure provided herein is merely an example.
The first metal layer 10 includes a gap structure 11, and the gap structure 11 penetrates through the first metal layer 10 in the first direction Z, so that a surface region of the first dielectric layer 1 overlapping with the gap structure 11 is directly exposed through the gap structure 11. The slot structure 11 may be rectangular, but in other embodiments, the shape of the slot structure is not limited to rectangular, for example, the slot structure may also be approximately rectangular, or elliptical, or other shapes. For example, the slot structure is further provided with an impedance matching structure to adapt the feed structure or the like such that the actual contour of the slot structure is curved (not shown). The slit structure is a radiation slit.
The slit structure 11 has different long side and wide side dimensions, and the long side dimension L is larger than the wide side dimension W. Specifically, the slot structure 11 includes a long side and a wide side, the wide side dimension W is greater than or equal to 0.15 times of the long side dimension L, and the wide side dimension W is less than or equal to 0.3 times of the long side dimension L, and then the long side dimension L is much greater than the wide side dimension W, so the shape of the slot structure 11 is similar to a slit, and the slot structure has a small antenna aperture. Based on this, the slot structure 11 can be equivalent to a radiation source of the packaged antenna, which can increase the bandwidth and radiation efficiency of the packaged antenna and realize wide beam radiation.
The width dimension W of the slit structure 11 is about 0.15 to 0.3 times the length dimension L, and thus the slit structure can cover a large bandwidth and can achieve a wide beam. If the width dimension W of the slot structure 11 is less than 0.15 times of the length dimension L, the width of the slot structure 11 is too small, which results in too small antenna aperture and difficulty in covering large bandwidth; if the width W of the slot structure 11 is greater than 0.3 times the length L, the width of the slot structure 11 is too large, which results in an excessively large antenna aperture and makes it difficult to achieve a wide beam effect.
It can be understood that the parameters of the bandwidth, the radiation efficiency, the beam width, and the like of the corresponding package antenna are related to the width dimension W and the length dimension L of the slot structure 11. For example, in the present embodiment, the optional slit structure 11 has a long side dimension L in the long side direction X of 1.4mm and a wide side dimension W in the wide side direction Y of 0.25mm, and has a width-to-length ratio of 0.15 ≦ (0.25/1.4) ≦ 0.3.
In order to enable the slot antenna to meet the wide beam range in a wide frequency band and adapt to the requirement of accurate detection of a radar sensor, the width side size of the envelope profile of the slot structure is greater than or equal to 0.15 times of the length side size of the slot structure, and the width side size is less than or equal to 0.3 times of the length side size of the slot structure. For example, the ratio of the width dimension to the long dimension of the envelope of the slot structure is 0.15:1, 0.16:1, 0.17:1, 0.18:1, …, 0.3: 1.
It should be noted that the ratio precision in the above examples is not limited to 0.01 times, and the ratio should at least accommodate process errors and possibly errors generated by the working environment according to the manufacturing process of the packaged antenna. Therefore, the ratio of the width dimension to the long side dimension of the envelope profile of the slit structure is, for example, 0.15: 1-0.16: 1, 0.16: 1-0.17: 1, …, or 0.29: 1-0.3: 1.
The second metal layer 20 comprises a feeding structure 21, the feeding structure 21 comprises a first feeding portion 211 and a second feeding portion 212, and the first feeding portion 211 and the second feeding portion 212 are used for feeding the same slot structure 11. It is understood that the second metal layer 20 may also be correspondingly configured with a plurality of feeding structures 21 according to the number of slot structures.
Taking the feed structure 21 corresponding to the slot structure as an example, the projection of the slot structure 11 of the first metal layer 10 on the second metal layer 20 along the first direction Z covers the first feed portion 211 and the second feed portion 212, so that the first feed portion 211 and the second feed portion 212 can feed the same slot structure 11. It is understood that, referring to fig. 3, the projection of the slot structure 11 on the second metal layer 20 covers at least the first feeding portion 211 and the second feeding portion 212. The first metal layer 10 is used as a main structure of radiation in the packaged antenna, and the slot structure 11 can be used as a radiation source of the packaged antenna; the second metal layer 20 serves as a main structure of feeding in the package antenna, and the first feeding portion 211 and the second feeding portion 212 thereof may serve as feeding lines of the package antenna. The first feeding portion 211 and the second feeding portion 212 in the second metal layer 20 feed the slot structure 11.
The feeding structure 21 is disposed on the second metal layer in a microstrip line manner, and the first feeding portion and the second feeding portion are used for feeding to the same slot structure of the first metal layer. In the example shown in fig. 3, the second metal layer 20 further includes a feeder circuit 22 connected between the feed structure 21 and the signal transmitting terminal (or the signal receiving terminal). Not shown, the feeder circuit 22 includes at least one of the following: microstrip transmission lines, power dividers, coaxial lines, pads, and the like. The second metal layer 20 further includes, for example, at least one of: isolation structure for preventing leakage signal from being received by receiving antenna; and a transmission line connected between the signal transmitting terminal (or signal receiving terminal) and the chip pin, etc. Wherein, the signal transmitting terminal (or the signal receiving terminal) is a signal terminal on the bare chip of the sensor chip.
As shown in fig. 3, the first feeding portion 211 and the second feeding portion 212 are both first feeding lines; the two first feed lines can be connected through a microstrip line 213 to form a U-shaped feed structure, and the microstrip line is also a feed line. As shown in fig. 2 and 3, the projection of the slot structure 11 on the second metal layer 20 overlaps the two first feeding lines along the first direction Z. The first feed line is an example of a first feed unit (or a second feed unit). The first feeding portion or the second feeding portion is also exemplified by resonant cavity feeding and the like.
In this application, be provided with the gap structure that runs through the rete on the first metal layer, the second metal layer includes feed structure, and feed structure includes first feed portion and second feed portion, and first feed portion and second feed portion are same gap structure feed. In this application, the slot structure equivalence is a radiation source, and encapsulation antenna adopts feed structure to feed for the slot structure, and the broadside size of slot structure is greater than or equal to 0.15 times of long limit size, and the broadside size is less than or equal to 0.3 times of long limit size, and the shape of slot structure is approximate to the slit so, possesses less antenna aperture, can increase encapsulation antenna's bandwidth and radiant efficiency, realizes the wide beam radiation. The antenna shown in the embodiment of the present application can satisfy the wide bandwidth and beam range of FMCW signals emitted from the radar sensor, in combination with the size of the slot structure and the feeding structure.
In some examples, the slot structure completely covers the first feed and the second feed. Referring to fig. 3, in the first direction Z, the projection of the slot structure 11 on the second metal layer 20 completely covers the first feeding portion 211 and the second feeding portion 212, so that matching between the feeding structure 21 and the slot structure 11 can be improved, and the first feeding portion 211 and the second feeding portion 212 feed the same slot structure 21, which can increase the bandwidth and radiation efficiency of the packaged antenna and realize wide-beam radiation. As shown in fig. 3, the dimensions of the optional first feeding portion 211 and the second feeding portion 212 in the broadside direction Y are equal to the broadside dimension W of the slot structure 11.
In other embodiments, the size of the first feeding part and the second feeding part along the broadside direction Y can be selected to be larger than the broadside size of the slot structure; referring to fig. 4, which is a schematic diagram of another packaged antenna, as shown in fig. 4, optionally along the first direction Z, the slot structure 11 completely covers the first feeding portion 211 and the second feeding portion 212, and the size of the first feeding portion 211 and the second feeding portion 212 along the broadside direction Y is greater than the broadside size W of the slot structure 11.
It is understood that the slot structure covers at least one end of the first feeding portion and covers one end of the second feeding portion; the other ends of the first feeding portion and the second feeding portion may be within the coverage range of the slot structure, or may extend out of the coverage range of the slot structure. Not limited to the above illustration. When the other ends of the first feeding portion and the second feeding portion extend out of the coverage range of the slot structure, the projection of the first feeding portion and the second feeding portion on the slot structure is overlapped with the long side of the slot structure.
In some examples, the first feed and the second feed are disposed on either side of an axis of symmetry of the fed slot structure. Still referring to fig. 3, the microstrip line 213 in the feed structure 21 connects the first feed 211 and the second feed 212, so that the feed structure 21 has a U-shaped structure. In other examples, the first feed and the second feed may also provide the feed using separate feed lines. For example, as shown in fig. 5, the first feeding portion 211 and the second feeding portion 212 are respectively connected to different microstrip lines 214 and 215, and the different microstrip lines 214 and 215 are respectively connected to the first feeding portion 211 and the second feeding portion 212 at a predetermined phase interval, for example, the phase interval is set based on an integral multiple of a wavelength.
The optional first feed and the second feed are symmetrically arranged based on an axis of symmetry of the slot structure. Referring to fig. 3 and 5, the slot structure 11 has an axis of symmetry 11a, and the first feeding portion 211 and the second feeding portion 212 are symmetrically arranged based on the axis of symmetry 11a, so that matching between the slot structure 11 and the feeding structure 21 can be improved, and thus bandwidth and radiation efficiency of the packaged antenna can be increased.
It is to be understood that the above is only an example of the feeding structure, the distribution of the feeding structure and the slot structure is not limited thereto, and the relevant practitioner may design the feeding structure and the slot structure appropriately according to the product requirement.
The long side dimension of the selectable slit structure is based on lambda g Set/2, λ g Is the operating wavelength. The long side size of the gap structure influences the working frequency of the packaged antenna, and the larger the long side size is, the lower the working frequency is. In this embodiment, the long side size of the slot structure is designed based on the operating wavelength, so that the appropriate operating frequency of the packaged antenna can be obtained.
Operating wavelength lambda g Can pass through the equivalent dielectric constant epsilon e And (4) calculating.
Figure BDA0003660338120000101
Where c is the speed of light, f is the operating frequency, ε r Is the relative dielectric constant of the dielectric layer, h is the dielectric layer height, and W is the width of the transmission line connecting the feed structure 21. In this embodiment, the long side size of the slot structure is designed according to the working wavelength, and then the wide side size is designed according to the long side size of the slot structure, so that the packaged antenna can generate a required radiation frequency.
The optional feed structure further comprises: the first microstrip line is coupled to the first feed portion, and the second microstrip line is coupled to the second feed portion; alternatively, the feeding structure further includes: and the third microstrip line is coupled to the first feed part and the second feed part.
Referring to fig. 3, the feeding structure 21 further includes: a third microstrip line 213, the third microstrip line 213 being coupled to the first feeding portion 211 and the second feeding portion 212. In this embodiment, the first feeding portion 211 and the second feeding portion 212 share a microstrip line, that is, one end of the third microstrip line 213 is coupled to the first feeding portion 211 and the other end is coupled to the second feeding portion 212, the first feeding portion 211 and the second feeding portion 212 may be symmetrically arranged along the first symmetry axis 11a, and the third microstrip line 213 and the first feeding portion 211 and the second feeding portion 212 form a U-shaped structure.
The third microstrip line 213 coupling the first feeding portion 211 and the second feeding portion 212, which has a dimension in the long side direction X of the slot structure 11 smaller than the long side dimension L of the slot structure 11, may ensure that the slot structure 11 covers the first feeding portion 211 and the second feeding portion 212.
Referring to fig. 5, the feeding structure 21 further includes: a first microstrip line 214 and a second microstrip line 215, the first microstrip line 214 is coupled to the first feeding portion 211, and the second microstrip line 215 is coupled to the second feeding portion 212. In this embodiment, the microstrip lines coupled to the first feeding portion 211 and the second feeding portion 212 are independently disposed, wherein the first microstrip line 214 is coupled to the first feeding portion 211, the second microstrip line 215 is coupled to the second feeding portion 212, and the first feeding portion 211 and the second feeding portion 212 may be symmetrically arranged along the symmetry axis of the slot structure 11.
At least part or all of any one of the selectable microstrip lines is positioned outside the coverage range of the slot structure. It should be noted that the microstrip line cannot be completely exposed in the slot structure.
As described above, part of the microstrip line in the projection of the first metal layer 10 is located in the slot structure 11, that is, the projection of the microstrip line in the first metal layer 10 overlaps with the edge of the slot structure 11, so as to ensure that the microstrip line is not completely exposed in the slot structure 11.
In other embodiments, the projection of the microstrip line on the first metal layer may be located outside the coverage of the slot structure. As shown in fig. 5, the projection of the optional first microstrip line 214 on the first metal layer 10 is located outside the coverage of the slot structure 11, and the projection of the second microstrip line 215 on the first metal layer 10 is located outside the coverage of the slot structure 11, and at this time, the microstrip line is not exposed in the slot structure 11. Accordingly, one end of the first feeding portion 211 and the second feeding portion 212 is within the coverage of the slot structure 11, and the other end extends out of the coverage of the slot structure 11.
In other embodiments, referring to fig. 4, the projection of the microstrip line on the first metal layer may be located outside the slot structure 11 and contact with the edge of the slot structure 11.
The optional packaged antenna further comprises a plurality of through holes, the through holes penetrate through the packaged antenna along a first direction, and the first direction is perpendicular to the plane of the feed structure; a plurality of through holes are arranged around the gap structure. Specifically, the through hole extends along the first direction and penetrates from the first metal layer to the third metal layer
Referring to fig. 6, a schematic diagram of yet another packaged antenna is shown. As shown in fig. 6, the packaged antenna further includes a plurality of through holes 3, and the through holes 3 extend along the first direction Z and penetrate from the first metal layer 10 to the third metal layer 30. Referring to fig. 7, a top view of the second metal layer of the packaged antenna shown in fig. 6 is shown. As shown in fig. 7, in a direction parallel to the second metal layer 20, the plurality of through holes 3 are disposed around the feed structure 21, and the plurality of through holes 3 are also disposed around the slot structure 11.
In this embodiment, the first metal layer 10 is a main radiating structure, wherein the designed slot structure 11 is used as a radiation source, the second metal layer 20 is a feed layer of the first metal layer 10, wherein a feed structure 21 is provided, the feed structure 21 includes a first feed portion 211 and a second feed portion 212, and the first feed portion 211 and the second feed portion 212 feed the same slot structure 11. The design can improve the matching of the feed structure 21 and the slot structure 11, and increase the bandwidth and the radiation efficiency of the packaged antenna. On the basis, the through holes 3 penetrating through the first metal layer 10 to the third metal layer 30 are arranged, so that the directional stability of the packaged antenna can be improved. The through hole 3 may be a metal hole, wherein the through hole 3 may be filled with a metal material or the inner wall may be coated with a metal material.
The optional packaged antenna further includes a power splitting structure electrically connected to the feed structure. Specifically, the optional second metal layer further includes a power dividing structure electrically connected to the feeding structure. Referring to fig. 3, the second metal layer 20 further includes a power dividing structure 22 electrically connected to the feed structure 21, wherein the power dividing structure 22 is electrically connected to the third microstrip line 213 in the feed structure 21. The signal is retransmitted to the first feeding portion 211 and the second feeding portion 212 through the power dividing structure 22, and the first feeding portion 211 and the second feeding portion 212 feed the slot structure 11. The power division structure is a feeder circuit.
The selectable feed structure and the corresponding slot structure form an antenna unit; and the feeding structures in the antenna units are connected in a parallel feeding mode. Referring to fig. 8, a schematic diagram of yet another packaged antenna is shown. As shown in fig. 8, the antenna unit is composed of a feeding structure 21 and a corresponding slot structure 11, the packaged antenna includes a plurality of antenna units, and the feeding structures 21 of the plurality of antenna units are connected in a parallel feeding manner to form a feeding network. Specifically, the first metal layer includes a plurality of slot structures 11, the second metal layer includes a plurality of feed structures 21, the plurality of slot structures 11 and the plurality of feed structures 21 are arranged in a one-to-one correspondence, and one slot structure 11 and one feed structure 21 which are arranged in a corresponding manner constitute one antenna unit.
The following description is given with specific examples. The slot structure of optional first metal level is the rectangle slot, and wherein, the long limit size L of slot structure is 1.4mm, and the broadside size W of slot structure is 0.25mm, detects this encapsulation antenna, obtains following testing result.
Referring to fig. 9, a graph of return loss versus frequency for a packaged antenna is shown. As can be seen from the figure, the operating frequency of the packaged antenna can cover 77GHz-81GHz, and obviously, the operating frequency band of the packaged antenna provided by the embodiment of the application is wide.
Referring to fig. 10, a graph of gain versus frequency for a packaged antenna is shown. As can be seen from the figure, the 6dB beam width of the E-plane, i.e. the electrical plane, of the packaged antenna can reach 166 °, and the horizontal plane beam width can reach 116 °, and obviously, the packaged antenna provided in the embodiment of the present application realizes wide beam radiation.
An embodiment of the present application further provides a radio device, including: a die for generating a radio frequency transmit signal and receiving a radio frequency receive signal; a package structure comprising a packaged antenna as described in any of the above embodiments; the packaging antenna is connected with the pins of the bare chip so as to convert a radio frequency transmitting signal into a first radio signal or convert a second radio signal into a radio frequency receiving signal. Optional radio devices include millimeter wave radar.
Wherein, at least a signal transmitter and a signal receiver are integrated in the bare chip. Wherein the signal transmitter is connected to a transmitting antenna in the package through a lead in the package; the signal receiver is connected to the receiving antenna in the package through leads in the package. Wherein the transmit antenna and/or the receive antenna are packaged as shown in any of the above examples.
The signal transmitter is used for transmitting the varying electric signal corresponding to the detection signal wave to the transmitting antenna in the antenna array. Specifically, the signal transmitter frequency modulates/phase modulates the reference electrical signal provided by the signal source, and modulates the reference electrical signal into a transmission electrical signal with current variation in a radio frequency band, so as to output the transmission electrical signal to the transmitting antenna. For example, the signal transmitter modulates the probing electrical signal to a radio frequency and feeds the transmitting antenna so that the transmitting antenna generates a probing signal wave having a center frequency in a frequency band, such as 64GHz, or 77 GHz. The signal transmitter can generate a probe signal wave with a fixed center frequency or a probe signal wave swept by the center frequency and a preset bandwidth. Taking the example that the detection signal wave comprises at least one chirp signal, wherein the chirp signal is an electromagnetic wave signal formed based on a chirp period, and the signal transmitter performs frequency multiplication processing based on a signal source of the chirp period and feeds the signal to a transmitting antenna so as to transmit the detection signal wave containing the chirp signal. When the probe signal wave is reflected by the object, an echo signal wave is formed. The receiving antenna receives the echo signal wave to generate an echo electric signal.
The signal receiver is configured to perform processing such as mixing, filtering, and AD conversion on an echo electric signal output from the receiving antenna using a probe electric signal that causes generation of a probe signal wave, to output a baseband digital signal. The baseband digital signal is used to extract measurement information such as distance, speed, angle, etc. between the sensor and the object through digital signal processing.
In this embodiment, a radio signal is transmitted and received by using a package antenna of a radio device, and the radio device integrating the package antenna has the characteristics of wide beam radiation, high radiation efficiency, and wide bandwidth.
An embodiment of the present application further provides an electronic device, including: a radio device as described above; and the data processing device is connected with the radio device and is used for processing the data of the digital signals transmitted and received by the radio device through the packaging antenna. Optionally, the data processing apparatus includes a signal processor, which is connected to the radio device and can perform signal processing on the radio signal received by the packaged antenna for object detection and communication.
The optional data processing device can be a CPU, an FPGA or a DSP on the sensor; the data processing device may also be a CPU, an FPGA, or a DSP on an intelligent device, for example, the intelligent device is a mobile phone. If the data processing device is an FPGA/DSP applied in the sensor, the function is to perform signal processing such as extracting distance, speed, angle, etc. on the baseband digital signal output by the chip, or perform data interface conversion, etc. If the data processing device is a CPU used in a sensor, its function is to perform target detection, target tracking, and the like using the measured measurement data.
It is to be noted that the foregoing is only illustrative of the presently preferred embodiments and application of the principles of the present invention. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims (12)

1. A packaged antenna, comprising: a slot structure and a feed structure;
the feeding structure comprises a first feeding part and a second feeding part, and the first feeding part and the second feeding part are used for feeding the same slot structure;
the slit structure comprises a long side and a wide side, wherein the size of the wide side is larger than or equal to 0.15 times of the size of the long side, and the size of the wide side is smaller than or equal to 0.3 times of the size of the long side.
2. The packaged antenna of claim 1, wherein the slot structure completely covers the first and second feeds.
3. The packaged antenna of claim 1, wherein the first and second feeds are symmetrically arranged based on an axis of symmetry of the slot structure.
4. The packaged antenna of claim 1, wherein the slot structure has a long dimension based on λ g /2 set, said λ g Is the operating wavelength.
5. The packaged antenna of claim 1,
the feeding structure further includes: the first microstrip line is coupled to the first feed portion, and the second microstrip line is coupled to the second feed portion;
alternatively, the feeding structure further includes: a third microstrip line coupled to the first and second feeds.
6. The packaged antenna according to claim 5, wherein at least part or all of any microstrip line is located outside the coverage of the slot structure.
7. The packaged antenna of claim 1, further comprising: and the power division structure is electrically connected with the feed structure.
8. The packaged antenna of claim 1, wherein the feed structure and corresponding slot structure form an antenna element; and the feeding structures in the antenna units are connected in a parallel feeding mode.
9. The packaged antenna of claim 1, further comprising a plurality of vias extending through the packaged antenna in a first direction, the first direction being perpendicular to a plane of the feed structure;
the plurality of through holes are arranged around the gap structure.
10. A radio device, comprising:
a die for generating a radio frequency transmit signal and receiving a radio frequency receive signal;
a package structure comprising a packaged antenna according to any of claims 1-9;
wherein the package antenna is connected with a pin of the die to convert the radio frequency transmission signal into a first radio signal or convert a second radio signal into the radio frequency reception signal.
11. The radio device of claim 10, wherein the radio device comprises a millimeter wave radar.
12. An electronic device, characterized in that the electronic device comprises:
the radio device of claim 10 or 11;
and the data processing device is connected with the radio device and is used for processing the data of the digital signals transmitted and received by the radio device through the packaging antenna.
CN202210575306.4A 2022-05-24 2022-05-24 Packaged antenna, radio device and electronic equipment Pending CN114883780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210575306.4A CN114883780A (en) 2022-05-24 2022-05-24 Packaged antenna, radio device and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210575306.4A CN114883780A (en) 2022-05-24 2022-05-24 Packaged antenna, radio device and electronic equipment

Publications (1)

Publication Number Publication Date
CN114883780A true CN114883780A (en) 2022-08-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210575306.4A Pending CN114883780A (en) 2022-05-24 2022-05-24 Packaged antenna, radio device and electronic equipment

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CN (1) CN114883780A (en)

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