CN110867643A - Wide beam antenna, antenna array and radar applying antenna array - Google Patents
Wide beam antenna, antenna array and radar applying antenna array Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
Abstract
The invention provides a wide beam antenna, an antenna array and a radar applying the antenna array, comprising: the radiation unit is used for transmitting/receiving electromagnetic wave signals and coupling the electromagnetic wave signals transmitted/received by the radiation units through a feed line; a feed line, the feed line comprising: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends. The invention can realize wider frequency band response under the condition of not increasing the area.
Description
Technical Field
The invention relates to the technical field of automotive electronics, in particular to a wide-beam antenna based antenna, an antenna array and a radar applying the antenna array.
Background
The antenna array is the most common transmitting and receiving mechanism applied in a radar system, and most antennas used in the millimeter wave radar at present are series feed type antenna arrays.
As shown in fig. 1-2, an electromagnetic wave signal is received from a radiator 1 through sheet coupling, and simultaneously, through the slow wave action of a material 3, the reflection action of a ground 6 is performed, so that a high-frequency current is transmitted to each node in the radiator 1 through a feed line 2, a low-sidelobe effect of an antenna is realized in the radiator 1 through different current intensity designs, and the high-frequency current passes through an impedance transformation section 4 and then the impedance transformation section, so that the transmitted energy is maximum. The reverse of this process is equally applicable.
As shown in fig. 3-4, a shorter physical length is realized on the basis again, the same high power strength is realized, electromagnetic wave signals are coupled and received from the radiator 1, and simultaneously, through the slow wave action of the material 3 and the reflection action of the ground 6, high-frequency current is transmitted to each node in the radiator 1 through the feed line 2, the characteristics of pointing and widening narrowing of different beams of the antenna can be realized by adjusting the distance between two adjacent radiators, for example, the distance between the radiator 1 and the radiator 1 is adjusted, and the radiator 1 and the feed line 2 are designed by adjusting the bending angle to 90 °, and coupling interference is not generated. The end radiator 5 is less reflective by adjusting its length, so that superior antenna parameters can be obtained. The low side lobe effect of the antenna is realized through the design of different current intensities in the radiator 1, and the high-frequency current passes through the impedance transformation section 4 and then the transmitted energy is maximum through the impedance transformation section. The reverse of this procedure is also applicable, so solution two is not a good design solution either.
In summary, the conventional method for increasing the antenna beam either needs to occupy a larger area, or cannot achieve a wider beam value.
Disclosure of Invention
In order to solve the above and other potential technical problems, the present invention provides a wide beam antenna, an antenna array, and a radar using the antenna array, which can achieve a wide frequency band response without increasing an area.
A wide beam antenna comprising:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
a feed line, the feed line comprising:
a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line;
a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends;
the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged;
the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
Furthermore, the antenna also comprises an impedance transformation section, if the impedance of the antenna array is not matched with the impedance of the system, the impedance matching section is added, and the number of the impedance matching units is one or more.
Further, the conversion parameter of the impedance matching unit is 1/4 wavelength microstrip line, and the impedance transformation formula is shown as follows
Furthermore, the radiation unit also comprises a grounding terminal which is used for making a reference plane for the radiation unit.
Further, the phase difference between the adjacent radiation units is not equal:
the sum of the phase angle of the electric field or the phase angle of the current of the radiation unit and the phase angle between the adjacent radiation units is 360 degrees.
Further, the intervals between the adjacent radiation units in the direction of the feed line are not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is smaller than that of the radiation unit far from the end.
Further, the intervals between the adjacent radiation units in the direction of the feed line are not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is longer than that of the radiation unit far from the end.
Further, projections between the adjacent radiation units perpendicular to the feed line direction overlap each other:
the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is less than half of the length of the radiation units, and the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is greater than zero.
Further, the radiating elements differ in size:
the thickness dimension of the radiation unit close to the system is smaller than that of the radiation unit in the middle of the feed line;
the thickness dimension of the radiating element near the distal end is smaller than the thickness dimension of the radiating element in the middle of the feed line.
Furthermore, the extending direction of the feeding line end is perpendicular to the length direction of the radiating unit, the length of the feeding line end wraps the width of the radiating unit, and two ends of the feeding line end are respectively connected with a connecting line extending upwards/downwards.
Furthermore, a buffer part is arranged at the connection part of the feeding line end and the connecting line, the feeding line end is connected with the connecting line through the buffer part, and the buffer part is used for reducing the reflection and reduction of electromagnetic wave signals caused by the bending radian between the feeding line end and the connecting line when the electromagnetic wave signals enter the connecting line through the feeding line end.
Further, the shape of the buffer part is arc-shaped or linear.
Further, when the shape of the buffer part is linear, the linear buffer part cuts off the intersection point and the included angle of the straight line belonging to the feeding line end and the straight line belonging to the connecting line based on the intersection point and the included angle, one end of the straight line can be connected with the feeding line end, and the other end of the straight line can be connected with the connecting line.
Further, when the buffer part is arc-shaped, the arc-shaped buffer part takes the line to which the feeding line end belongs and the line to which the connecting line belongs as tangent lines to form a circle, and the circular part is used for connecting the feeding line end and the connecting line end.
A wide beam antenna array comprising:
one or more of the wide-beam antennas may,
the wide beam antenna includes a radiation unit and a feed line:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
A radar made using the antenna array, comprising:
the radar antenna comprises one or more wide beam antenna arrays, a radar chip and a wiring terminal, wherein the wide beam antenna arrays are electrically connected with the radar chip, and the radar chip is electrically connected with the wiring terminal;
the wide beam antenna array comprises one or more wide beam antennas comprising radiating elements and feed lines:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
As described above, the present invention has the following advantageous effects:
(1) the invention can greatly reduce the physical size of the antenna, can increase or reduce the wave beam of the antenna, and has more flexible adjustment, because the antenna synthesis mode adopts a mode of half wavelength or shorter in a short distance, the common antenna generally needs more than one wavelength or more size. Therefore, the antenna can reduce the area of the PCB, reduce the cost and achieve the same electrical performance.
(2) The invention can realize wider frequency band response without increasing large area, because the resonant frequency of each radiator is different, the invention can achieve the purpose of widening bandwidth, thereby effectively using communication and radar systems and reducing cost.
(3) The antenna of the invention can use the radiation unit not limited to the horizontal polarization antenna, but also can be applied to the vertical polarization antenna, various oblique polarization antennas, including various circular polarization and elliptical polarization antennas, and the like, and the antenna array parameters can be adjusted by using the mode.
(4) The adjustment of the reflection branches at the tail end of the antenna is not only limited to the adjustment of the length of the radiation patch at the tail end, but also applicable to all modes which can realize less tail end current, the realization mode is not limited as long as the reflection caused by the tail end can be eliminated, and the beam direction and the frequency band characteristic of the antenna can be changed by adjusting the state of the tail end, which is the right characteristic of the invention.
(5) The shape of the antenna of the invention is not fixed on two sides or a plurality of sides, and can be any shape, and the purpose of antenna array synthesis can be achieved, which belongs to the scope of right.
(6) The included angle between the antenna and the feeder line can be any value, most of the adjusting parameters are concentrated on the beam width and the like, but the adjusting angle is not the only way and can be realized by connecting two points in a mode of various shapes, and all the claims are included.
(7) The antenna is also suitable for the synthesis of multi-column antennas, and the multi-column antennas can be the combination of horizontal, vertical and upper and lower 3D spaces and can be realized by using the similar mode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a schematic diagram of a conventional antenna as a design.
Fig. 2 shows a rear view of a conventional antenna as a design.
Fig. 3 is a schematic diagram of a conventional antenna according to the second embodiment.
Fig. 4 is a rear view of a conventional antenna according to the second embodiment.
Fig. 5 is a schematic diagram of a wide beam antenna according to the present invention.
FIG. 6 is a schematic diagram of a wide beam antenna array according to one embodiment of the present invention in a system.
Fig. 7 shows the E-plane and H-plane directional patterns of the antenna array of the present invention in an ideal environment.
Fig. 8 shows the E-plane and H-plane directional patterns of the antenna array of the present invention in actual detection.
Fig. 9 shows the phase diagram of the antenna array of the present invention in an ideal environment.
Fig. 10 shows the phase diagram of the antenna array of the present invention in an ideal environment.
In the figure:
1-a radiating element; 2-a feed line; 21-feeding line end group; 22-connecting line group; 3-material; 4-impedance transformation section; 5-a terminal radiating element; 6-grounding end; 101-antenna array.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to figures 5-10 of the drawings,
a wide beam antenna comprising:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
a feed line, the feed line comprising:
a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line;
a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends;
the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged;
the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
Furthermore, the antenna also comprises an impedance transformation section, if the impedance of the antenna array is not matched with the impedance of the system, the impedance matching section is added, and the number of the impedance matching units is one or more.
Further, the conversion parameter of the impedance matching unit is 1/4 wavelength microstrip line, and the impedance transformation formula is shown as follows
Furthermore, the radiation unit also comprises a grounding terminal which is used for making a reference plane for the radiation unit.
Further, the phase difference between the adjacent radiation units is not equal:
the sum of the phase angle of the electric field or the phase angle of the current of the radiation unit and the phase angle between the adjacent radiation units is 360 degrees.
Further, the intervals between the adjacent radiation units in the direction of the feed line are not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is smaller than that of the radiation unit far from the end.
Further, the intervals between the adjacent radiation units in the direction of the feed line are not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is longer than that of the radiation unit far from the end.
Further, projections between the adjacent radiation units perpendicular to the feed line direction overlap each other:
the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is less than half of the length of the radiation units, and the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is greater than zero.
Further, the radiating elements differ in size:
the thickness dimension of the radiation unit close to the system is smaller than that of the radiation unit in the middle of the feed line;
the thickness dimension of the radiating element near the distal end is smaller than the thickness dimension of the radiating element in the middle of the feed line.
Furthermore, the extending direction of the feeding line end is perpendicular to the length direction of the radiating unit, the length of the feeding line end wraps the width of the radiating unit, and two ends of the feeding line end are respectively connected with a connecting line extending upwards/downwards.
Furthermore, a buffer part is arranged at the connection part of the feeding line end and the connecting line, the feeding line end is connected with the connecting line through the buffer part, and the buffer part is used for reducing the reflection and reduction of electromagnetic wave signals caused by the bending radian between the feeding line end and the connecting line when the electromagnetic wave signals enter the connecting line through the feeding line end.
Further, the shape of the buffer part is arc-shaped or linear.
Further, when the shape of the buffer part is linear, the linear buffer part cuts off the intersection point and the included angle of the straight line belonging to the feeding line end and the straight line belonging to the connecting line based on the intersection point and the included angle, one end of the straight line can be connected with the feeding line end, and the other end of the straight line can be connected with the connecting line.
Further, when the buffer part is arc-shaped, the arc-shaped buffer part takes the line to which the feeding line end belongs and the line to which the connecting line belongs as tangent lines to form a circle, and the circular part is used for connecting the feeding line end and the connecting line end.
A wide beam antenna array comprising:
one or more of the wide-beam antennas may,
the wide beam antenna includes a radiation unit and a feed line:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
A radar made using the antenna array, comprising:
the radar antenna comprises one or more wide beam antenna arrays, a radar chip and a wiring terminal, wherein the wide beam antenna arrays are electrically connected with the radar chip, and the radar chip is electrically connected with the wiring terminal;
the wide beam antenna array comprises one or more wide beam antennas comprising radiating elements and feed lines:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
Moreover, although illustrative embodiments have been described herein, there are equivalent elements, modifications, omissions, combinations (e.g., across aspects of the various embodiments), adaptations and/or ranges of any and all embodiments that may be altered, as will be appreciated by those in the art. Based on the technology of the present disclosure. The limitations in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the specification or during the prosecution of the application. These examples should be construed as non-exclusive. Further, the steps of the disclosed methods may be modified in any manner, including by reordering steps and/or inserting or deleting steps. It is intended, therefore, that the specification and examples be considered as illustrative only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
Claims (9)
1. A wide beam antenna, comprising:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
a feed line, the feed line comprising:
a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line;
a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends;
the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged;
the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
2. The wide-beam antenna of claim 1, further comprising an impedance transformation section, wherein if the impedance of the antenna array and the impedance of the system are not matched, the impedance matching section is added, and the number of the impedance matching units is one or more.
3. The wide beam antenna of claim 2 wherein the impedance matching unit has switching parameters of 1/4 wavelength microstrip lines, and the impedance transformation formula is as follows
4. The wide beam antenna of claim 3 wherein the phase differences between adjacent radiating elements are not equal:
the sum of the phase angle of the electric field or the phase angle of the current of the radiation unit and the phase angle between the adjacent radiation units is 360 degrees.
5. The wide beam antenna of claim 4 wherein the spacing between adjacent radiating elements in the direction of the feed line is not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is smaller than that of the radiation unit far from the end.
6. The wide beam antenna of claim 5 wherein the spacing between adjacent radiating elements in the direction of the feed line is not equal:
for the radiation unit close to the end, the spacing length between the adjacent feed lines is longer than that of the radiation unit far from the end.
7. The wide beam antenna of claim 6 wherein the projections between adjacent radiating elements perpendicular to the feed line direction overlap each other:
the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is less than half of the length of the radiation units, and the distance D of the central points of the adjacent radiation units in the direction vertical to the feeding line is greater than zero.
8. A wide beam antenna array comprising:
one or more of the wide-beam antennas may,
the wide beam antenna includes a radiation unit and a feed line:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
9. A radar manufactured using the antenna array, comprising:
the radar antenna comprises one or more wide beam antenna arrays, a radar chip and a wiring terminal, wherein the wide beam antenna arrays are electrically connected with the radar chip, and the radar chip is electrically connected with the wiring terminal;
the wide beam antenna array comprises one or more wide beam antennas comprising radiating elements and feed lines:
the radiation units are used for transmitting/receiving electromagnetic wave signals and are coupled with the electromagnetic wave signals transmitted/received by the radiation units through feed lines, the radiation units are distributed on two sides of the feed lines, and a radiation unit on the different side is arranged between two adjacent radiation units on the same side of the feed lines;
the feed line includes: a feed line end group including a plurality of feed line ends, each of the feed line ends being disposed at a position contacting the radiation unit, for connecting the radiation unit and the feed line; a connection line group including a plurality of connection lines each for connecting adjacent two feed line ends; the relative angle between the feed line end and the connecting line is non-vertically arranged and/or non-horizontally arranged; the length of the connecting line is longer than the length of the interval between the adjacent feed line ends.
The wide beam antennas are arranged side by side at the same height so that adjacent wide beam antennas are located at the same position along the feed line for the same size radiating element.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112534648A (en) * | 2020-09-18 | 2021-03-19 | 华为技术有限公司 | Antenna device, preparation method of antenna device, radar and terminal |
| CN112635970A (en) * | 2020-12-02 | 2021-04-09 | 北京安石科技有限公司 | Shell seeker positioning antenna and positioning method |
| TWI773010B (en) * | 2020-12-10 | 2022-08-01 | 大陸商江陰康瑞成型技術科技有限公司 | Radiated energy distribution structure of millimeter-wave antenna |
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