[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0023] See Figure 1-3 The radio frequency antenna device 1 according to the first embodiment of the present invention includes a substrate 11 and at least one antenna unit 12 provided on the substrate 11; the antenna unit 12 includes a radiating portion 121 and a conductor portion 122, and the radiating portion 121 is located above the substrate 11. It is spaced apart from the substrate 11, one end of the conductor portion 122 is connected to the radiation portion 121, and the other end is supported on the substrate 11, and the width of at least a part of the conductor portion 122 gradually increases in a direction away from the radiation portion 121. Wherein, the radiating part 121 is connected to the power supply and the ground through the conductor part 122, and is used as a radiating element in operation to realize the reception and/or transmission of radio frequency signals.
[0024] The radio frequency antenna device 1 in the present invention has a three-dimensional structure. The radiating part 121 stands on the substrate 11 through the conductor part 122, and maintains a certain interval with the substrate 11 to adjust the operating frequency band and performance in the operating frequency band. Therefore, the conductor part 122 not only plays the role of electrical connection, but also plays a role of mechanical support. In order to ensure the stable operation of the antenna device, on the one hand, it is necessary to ensure the stability of the electrical signal transmission between the radiating part 121 and the conductor part 122, and on the other hand, to ensure the mechanical support of the conductor part 122 to the radiating part 121 is stable. The part 122 plays a particularly important role in the entire antenna device.
[0025] Specifically, when the diameter or width of the antenna conductor is large, its input impedance changes smoothly with frequency. As a result, the width of at least a part of the conductor part is gradually increased in the direction away from the radiation part, so that the impedance of this part of the conductor part continuously changes with frequency more smoothly, thereby gradually reducing the sensitivity of the conductor part to frequency changes, ensuring The working stability of the antenna device is improved. At the same time, when the width of the conductor part gradually increases, the impedance changes continuously, reducing the possibility of sudden or abrupt changes in impedance during operation. Signals can be transmitted in it more continuously, avoiding impedance mismatch as much as possible. Therefore, when the impedance matching is ensured, it is ensured that no reflected waves will appear on the feeder, thereby avoiding the loss of radiation caused by the unnecessary reflected waves generated additionally, and ensuring the radiation efficiency; and the continuity and stability of the impedance are obtained It is ensured that the height of the conductor portion can be reduced correspondingly, thereby improving the height requirement of the three-dimensional antenna device. By reducing the height of the conductor part, the space occupied by the antenna device can be correspondingly reduced, which is beneficial to the miniaturization of the antenna device.
[0026] Moreover, in the radio frequency antenna device of the present invention, the radiating part is basically suspended, and the conductor part also functions to support the radiating part. When the width of at least a part of the conductor part gradually increases in the direction away from the radiating part, it can increase The supporting ability of the conductor part to the radiating part improves the supporting ability compared to the conventional need for additional plastic supports. Therefore, the present invention can omit the arrangement of the plastic supports and simplify the device structure and process At the same time, the reliability of the antenna device is improved due to the reduction of components. In addition, in the process of realizing the above-mentioned functions, only a part of the conductor portion is gradually widened, which will not affect the spatial volume of the antenna, ensuring that the antenna device can be miniaturized.
[0027] Specifically, the substrate 11 may be a PCB board, and the conductor portion 122 may be grounded and/or connected to a power supply through wiring on the PCB board.
[0028] The radiation part 121 may be made of a conductive plate, which is a conductive metal thin plate, for example, a copper plate, a steel plate, an SUS plate, or the above-mentioned metal plate that has been plated. The radiation part 121 is entirely in a plane, the plane is located in the space above the substrate 11 and is separated from the substrate 11 by a certain distance, and the plane may be parallel to the substrate 11, specifically parallel to the surface of the adjacent substrate 11. In a specific implementation of this embodiment, the radiating portion 121 includes a plurality of strip-shaped radiating conductors connected end to end, and the included angle between two adjacent radiating conductors is greater than 0° and less than or equal to 90°. For example, see figure 2 , The radiating part 121 includes a first radiating conductor 1211 and a second radiating conductor 1212, the angle A between the first radiating conductor 1211 and the second radiating conductor 1212 is 90°, because the first radiating conductor 1211 will be directly connected to the conductor 122 For electrical connection, the length of the first radiating conductor 1211 can be set to be greater than the length of the second radiating conductor 1212, so that other parts of the first radiating conductor 1211 far away from the conductor portion 122 have sufficient length and are less affected by the conductor portion 122, thereby It can stably implement the reception and/or transmission of radio frequency signals.
[0029] Further, the radiating part 121 may further include a connecting end 1213, and the connecting end 1213 is a part of one of the radiating conductors, for example figure 2 The connecting end 1213 in is the floating end of the first radiating conductor 1211. The connecting end 1213 is used to connect to the conductor portion 122, and the width of the connecting end 1213 is larger than the width of other parts of the radiating portion 121. The impedance of the widened part is correspondingly increased, and the impedance continuously changes, reducing the possibility of sudden changes or sudden changes in impedance during operation. When directly electrically connected to the conductor portion 122, it can promote more continuous transmission of electrical signals therein. This facilitates the stable electrical connection between the radiating part 121 and the conductor part 122.
[0030] The conductor portion 122 may also be made of a conductive plate, and the conductor portion 122 and the radiating portion 121 may be an integral structure, which is formed by bending the same plate-shaped conductor. The conductor portion 122 is connected between the substrate 11 and the radiation portion 121 and may be perpendicular to the plane where the radiation portion 121 is located. See image 3 The conductor portion 122 may further include a ground conductor 1221 and a feed conductor 1222 that are spaced apart. The ground conductor 1221 is grounded through the substrate 11, and the feed conductor 1222 is connected to the feed source through the substrate 11; the ground conductor 1221 and the feed conductor 1222 The width of at least one gradually increases in the direction away from the radiation part 121. The figure shows that the width of the ground conductor 1221 gradually increases in the direction away from the radiating part 121, but it is not limited to this, and the width of the feeding conductor 1222 may gradually increase in the direction away from the radiating part 121, or the feeding conductor The widths of both the body 1222 and the ground conductor 1221 gradually increase in the direction away from the radiation part 121 at the same time. Further, the conductor portion 122 further includes a matching conductor 1223 that connects the feed conductor 1222 and the ground conductor 1221 laterally. The added matching conductor 1223, the feeding conductor 1222 and the grounding conductor 1221 constitute an electrical conductor together. Through the matching conductor 1223, the overall impedance and the impedance distribution of the conductor portion 122 can be further adjusted, thereby further adjusting the antenna performance and stabilizing electrical transmission. In addition, the increased matching conductor 1223 can increase the supporting contact area between the conductor portion 122 and the radiating portion 121, reducing the pressure of the radiating portion 121 on the conductor portion 122 under the same pressure, thereby increasing the conductor portion 122 to the radiating portion The 121 support performance, in turn, improves the stability of the mechanical support, which is conducive to the stable operation of the antenna device.
[0031] The above-mentioned ground conductor 1221 and feed conductor 1222 are both used to realize electrical connection between the antenna device and other circuits. For example, the ground conductor 1221 can be grounded, and the feed conductor 1222 can be connected to the feed source and the signal processing device. In the electrical connection process of the ground conductor 1221 and the feed conductor 1222, when the diameter or width is large, the input impedance changes with frequency relatively smoothly. As a result, the width of at least a part of the ground conductor 1221 and/or the feed conductor 1222 is gradually increased in the direction away from the radiating part, so that the impedance of this part of the conductor part continuously changes with frequency more smoothly, thereby gradually reducing The sensitivity of the conductor to frequency changes ensures the stability of the antenna device. At the same time, when the width of the conductor part gradually increases, the impedance changes continuously, reducing the possibility of sudden or abrupt changes in impedance during operation. Signals can be transmitted in it more continuously, avoiding impedance mismatch as much as possible. Therefore, when the impedance matching is ensured, it is ensured that no reflected waves will appear on the feeder, thereby avoiding the loss of radiation caused by the unnecessary reflected waves generated additionally, and ensuring the radiation efficiency; and the continuity and stability of the impedance are obtained It is ensured that the height of the conductor portion can be reduced correspondingly, thereby improving the height requirement of the three-dimensional antenna device.
[0032] In the radio frequency antenna device according to the second embodiment of the present invention, the feeding conductor and the grounding conductor of the conductor part are spaced apart from each other, one of the feeding conductor and the grounding conductor is directly connected to the radiating part, and the other conductor is directly connected to the radiating part. One of the above-mentioned conductors is capacitively coupled. See for example Figure 4 The feeding conductor 2222 of the conductor portion 222 is directly connected to the radiating portion (not shown in the figure). The grounding conductor 2221 and the feeding conductor 2222 are adjacent but spaced apart. There is a space gap 2223 between the two. The width gradually widens in the direction away from the radiation part. This is equivalent to forming a parallel plate capacitor between the feed conductor 2222 and the ground conductor 2221, and the two are connected by capacitance. A capacitive connection is added to the formed antenna circuit, so that the overall impedance and impedance distribution of the conductor portion 222 can be further adjusted to further adjust the stability of the antenna performance. The technical features not described here are similar to or the same as the corresponding technical features in the first embodiment, and the description of this part of the technical features in the first embodiment can be cited, and details are not repeated here.
[0033] See Figure 5 , The radio frequency antenna device according to the third embodiment of the present invention includes a first antenna unit 12a and a second antenna unit 12b. The radiating part of the first antenna unit 12a includes a first radiating conductor 1211a and a second radiating conductor 1212a. The angle A between 1211a and the second radiating conductor 1212a is 90°, and the length of the first radiating conductor 1211a is greater than the length of the second radiating conductor 1212a; the radiating part of the second antenna unit 12b includes the first radiating conductor 1211b and the second radiating conductor 1211b. For the two radiation conductors 1212b, the angle A between the first radiation conductor 1211b and the second radiation conductor 1212b is 90°, and the length of the first radiation conductor 1211b is greater than the length of the second radiation conductor 1211b. The first radiating conductor 1211a of the first antenna unit 12a is parallel to the first radiating conductor 1211b of the second antenna unit 12b, and the second radiating conductor 1212a of the first antenna unit 12a is parallel to the second radiating conductor 1212b of the second antenna unit 12b, So as to approximate a rectangular structure. The radio frequency antenna device in this embodiment forms an array antenna, and the relatively parallel spatial arrangement between the antenna elements can make great use of space and try to ensure the miniaturization of the entire device.
[0034] Of course, the above-mentioned number of antenna units is only used as an example and is not a limitation of the present invention. Those of ordinary skill in the art can choose other suitable number of antenna units, such as 4 or 6, according to actual conditions. See Image 6 In an improved implementation of this embodiment, the radio frequency antenna device includes a first antenna unit 12a, a second antenna unit 12b, a third antenna unit 12c, and a fourth antenna unit 12d. The structure of the four antenna units may be the same, and only the azimuth The arrangement is different. The four antenna elements are arranged end to end in a rectangular array. And the first radiation conductor 1211a of the first antenna unit 12a is parallel to the first radiation conductor 1211b of the second antenna unit 12b, and the second radiation conductor 1212a of the first antenna unit 12a is parallel to the second radiation conductor 1212b of the second antenna unit 12b , The first radiation conductor 1211c of the third antenna unit 12c is parallel to the first radiation conductor 1211d of the fourth antenna unit 12d, and the second radiation conductor 1212c of the third antenna unit 12c is parallel to the second radiation conductor 1212d of the fourth antenna unit 12d . This relatively parallel spatial arrangement can make great use of space and try to ensure the miniaturization of the entire device.
[0035] It is understandable that the above examples only express the preferred embodiments of the present invention. The descriptions are more specific and detailed, but they should not be understood as limiting the scope of the present invention; it should be noted that for those of ordinary skill in the art In other words, without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can be made. These all belong to the scope of protection of the present invention; therefore, everything that follows the scope of the claims of the present invention All equivalent changes and modifications shall fall within the scope of the claims of the present invention.
