CN-122026086-A - Miniaturized high-gain automobile V2X antenna

Abstract

The invention discloses a miniaturized high-gain automobile V2X antenna, which comprises a substrate, wherein a feed network, a pi-type impedance matching circuit and at least one amplifying structure are arranged on the substrate, the amplifying structure comprises a spiral spring, a first connecting section and a second connecting section which are overlapped with an axis are respectively arranged at two ends of the spiral spring, the first connecting section is used for being connected with the substrate, a capacitive oscillator is arranged at one end, far away from the spiral spring, of the second connecting section, and the miniaturized high-gain automobile V2X antenna counteracts the characteristic of spiral inductance by utilizing the spiral structure of the spiral spring and matching the capacitive oscillator, so that the resonance length is shortened, and the effect of miniaturization of the antenna is realized. Compared with the existing products in the market, the product has the advantages that the size of the vibrator is reduced through the capacitive vibrator, and the size of the cylinder is reduced.

Inventors

• WANG LIJUAN

Assignees

• 沈阳安费诺三浦汽车电子有限公司
• 安费诺三浦（辽宁）汽车电子有限公司

Dates

Publication Date

20260512

Application Date

20260306

Claims (10)

1. 1. A miniaturized high gain automotive V2X antenna comprising: The device comprises a substrate, wherein a feed network, a pi-type impedance matching circuit and at least one amplifying structure are arranged on the substrate; The amplifying structure comprises a coil spring, a first connecting section and a second connecting section which are overlapped with the axis are respectively arranged at two ends of the coil spring, the first connecting section is used for being connected with the substrate, and a capacitive vibrator is arranged at one end, far away from the coil spring, of the second connecting section.
2. 2. The miniaturized high gain automotive V2X antenna according to claim 1, wherein a plurality of said amplifying structures are connected axially in sequence.
3. 3. The miniaturized high gain automotive V2X antenna according to claim 1, wherein the feed network comprises CPWG structures, the CPWG structures for introducing radio frequency signals to terminals or radio frequency cables.
4. 4. The miniaturized high gain automotive V2X antenna according to claim 1, wherein the lower end of the base plate is provided with a metal reflective floor.
5. 5. The miniaturized high-gain automotive V2X antenna according to claim 3, wherein the pi-type impedance matching circuit is connected to the substrate through a feed point.
6. 6. The miniaturized high-gain automotive V2X antenna according to claim 5, wherein the pi-type impedance matching circuit has an impedance of 50Ω.
7. 7. The miniaturized high-gain automotive V2X antenna according to claim 2, wherein the helical direction of the helical springs of each of the amplifying structures is uniform, and the resonant length is shortened in cooperation with canceling helical inductance characteristics.
8. 8. The miniaturized high gain automotive V2X antenna according to claim 1, wherein the capacitive element is a capacitive loading plate, the capacitive loading plate being circular and coaxially disposed with the coil spring.
9. 9. The miniaturized high gain automotive V2X antenna according to claim 8, wherein the spiral radius of the spiral spring is no greater than the radius of the capacitive loading plate.
10. 10. The miniaturized high gain automotive V2X antenna of claim 1, wherein the substrate is an FR4 dielectric board.

Description

Miniaturized high-gain automobile V2X antenna Technical Field The invention belongs to the technical field of automobile V2X antennas, and particularly relates to a miniaturized high-gain automobile V2X antenna. Background With the development of intelligent network-connected automobiles, the V2X (vehicle-to-everything) technology needs to realize high-speed and stable communication in a complex electromagnetic environment, and strict requirements are put on miniaturization, high gain and broadband characteristics of antennas. The traditional V2X antenna of the automobile adopts a whip or patch structure, and has the following problems: 1. size limitation that the wavelength and the size of the traditional element antenna are positively related, so that the traditional element antenna is difficult to adapt to compact installation space (such as rearview mirrors and roof shark fins) of an automobile; 2. The gain is insufficient, the radiation efficiency is reduced after miniaturization, and the communication distance is shortened, and the anti-interference capability is weakened. Disclosure of Invention The invention aims to provide a miniaturized high-gain automobile V2X antenna aiming at the defects in the prior art, and solves the problems of large size and limited gain of the existing whip or patch structure. In order to achieve the above object, the present invention provides a miniaturized high-gain V2X antenna for an automobile, comprising: The device comprises a substrate, wherein a feed network, a pi-type impedance matching circuit and at least one amplifying structure are arranged on the substrate; The amplifying structure comprises a coil spring, a first connecting section and a second connecting section which are overlapped with the axis are respectively arranged at two ends of the coil spring, the first connecting section is used for being connected with the substrate, and a capacitive vibrator is arranged at one end, far away from the coil spring, of the second connecting section. Optionally, a plurality of the amplifying structures are sequentially axially connected. Optionally, the feeding network includes CPWG structures, and the CPWG structures are used for guiding radio-frequency signals to terminals or radio-frequency cables. Optionally, a metal reflective floor is arranged at the lower end of the substrate. Optionally, the pi-type impedance matching circuit is connected with the substrate through a feeding point. Optionally, the pi-type impedance matching circuit has an impedance of 50Ω. Optionally, the spiral direction of the spiral springs of each amplifying structure is consistent, and the spiral inductance characteristic is matched and counteracted, so that the resonance length is shortened. Optionally, the capacitive vibrator is a capacitive loading plate, and the capacitive loading plate is circular and is coaxially arranged with the coil spring. Optionally, the spiral radius of the spiral spring is not greater than the radius of the capacitive loading plate. Optionally, the substrate is an FR4 dielectric board. The invention provides a miniaturized high-gain automobile V2X antenna, which has the beneficial effects that: The miniaturized high-gain automobile V2X antenna has the advantages that the spiral structure of the spiral spring is matched with the capacitive oscillator to counteract the spiral inductance characteristic, the resonance length is shortened, and the antenna miniaturization effect is achieved. Compared with the existing products in the market, the product has the advantages that the size of the vibrator is reduced through the capacitive vibrator, and the size of the cylinder is reduced. Additional features and advantages of the invention will be set forth in the detailed description which follows. Drawings The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention. Fig. 1 shows a schematic structural diagram of an amplification structure of a miniaturized high-gain automotive V2X antenna according to one embodiment of the present invention. Fig. 2 shows a schematic structural view of a substrate of a miniaturized high-gain automotive V2X antenna according to one embodiment of the present invention. Reference numerals illustrate: 1. a substrate; 2, a feed network, 3, an impedance matching circuit, 4, an amplifying structure; 41. Coil spring, 42, capacitive vibrator. Detailed Description Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth he