KR-102963739-B1 - ANTENNA

Abstract

The present invention relates to an antenna comprising a housing (3), a core (1), and a coil (2) wound around the core (1), wherein the core (1) having the coil (2) is mounted within a potting compound (5) in the housing (3), and the potting compound (5) is softer than 40 Shore A.

Inventors

• 파스코, 시즈몬
• 레브레톤, 슈테판
• 무지키, ™…시
• 달레산드로, 루카

Assignees

• 티이 커넥티비티 솔루션스 게엠베하

Dates

Publication Date

20260513

Application Date

20200410

Priority Date

20190412

Claims (17)

1. An antenna comprising a housing (3), a coil (2), and a core (1) wound around the coil (2), wherein the core (1) having the coil (2) is mounted within a potting compound (5) within the housing (3). The above potting compound (5) is softer than 40 Shore A, and The antenna is characterized in that the core has a first sub-core (1.1), a second sub-core (1.2), and a core carrier (4), the first sub-core (1.1) and the second sub-core (1.2) are held within the core carrier (4), and the core carrier (4) is composed of elastic arms for holding the core carrier (4) at a predetermined position when assembled to the housing (3), and the elastic arms are pressed against the inner wall of the housing (3) to move the core carrier (4) to a predetermined position within the housing (3).
2. In claim 1, the potting compound (5) is an antenna that is softer than 30 Shore A.
3. delete
4. An antenna according to claim 1, wherein the first sub-core (1.1) has a first longitudinal axis and the second sub-core (1.2) has a second longitudinal axis, and the first sub-core (1.1) and the second sub-core (1.2) are arranged such that the second longitudinal axis extends to an extension of the first longitudinal axis.
5. In claim 4, the first sub-core (1.1) has a first cross-section perpendicular to the first longitudinal axis, and the second sub-core (1.2) has a second cross-section corresponding to the first cross-section perpendicular to the second longitudinal axis, The first sub-core (1.1) and the second sub-core (1.2) are antennas arranged such that the first cross-section lies in the same plane as the second cross-section.
6. An antenna according to claim 4, wherein the first sub-core (1.1) is positioned at a certain distance from the second sub-core (1.2), and the gap formed by the distance is filled with the potting compound.
7. delete
8. In claim 1, the first sub-core (1.1) comprises a first end and a second end opposite the first end, and the second sub-core (1.2) comprises a first end and a second end opposite the first end, wherein the first end of the first sub-core (1.1) is positioned opposite the first end of the second sub-core (1.2), and the core carrier (4) is an antenna extending from the second end of the first sub-core (1.1) to the second end of the second sub-core (1.2).
9. An antenna according to claim 8, wherein the coil is wound on the core carrier such that the coil extends over 80% or more of the length between the second ends of the sub-core.
10. An antenna according to claim 1, wherein the core carrier (4) having the assembled subcore (1.1, 1.2) and the coil (2) is designed to displace the first subcore (1.1) and/or the second subcore (1.2) in the direction of the longitudinal axis of the corresponding subcore (1.1, 1.2) before the subcore (1.1, 1.2), the core carrier (4), and the coil (2) are potted into the potting compound (5) within the housing (3).
11. An antenna according to claim 1, wherein the core carrier having the assembled subcore and the coil is designed to fix the first subcore (1.1) and/or the second subcore (1.2) perpendicular to the direction of the longitudinal axis of the corresponding subcore before the subcore, the core carrier and the coil are potted into the potting compound (5) within the housing.
12. An antenna according to claim 1, wherein the positions of the core carrier (4), the coil (2), the first sub-core (1.1) and/or the second sub-core (1.2) are fixed within the housing (3) by the potting compound (5).
13. An antenna according to claim 1 or 2 for use in a vehicle designed to transmit key data for opening and/or starting the vehicle.
14. A vehicle having an antenna according to Article 13.
15. As a method for manufacturing an antenna, A step of potting a core (1) wound into a coil (2) with a potting compound (5) inside a housing (3); A method for manufacturing the antenna, comprising the step of curing the potting compound (5), The hardened potting compound (5) is softer than 40 Shore A, and A method for manufacturing an antenna, wherein the core comprises a first sub-core (1.1), a second sub-core (1.2), and a core carrier (4), wherein the first sub-core (1.1) and the second sub-core (1.2) are held within the core carrier (4), and the core carrier (4) is composed of elastic arms for holding the core carrier (4) at a predetermined position when assembled into a housing (3), and wherein the elastic arms are pressed against the inner wall of the housing (3) to move the core carrier (4) to a predetermined position within the housing (3).
16. An antenna according to claim 5, wherein the first subcore (1.1) has a first cross-section identical along the entire first longitudinal axis, or the second subcore (1.2) has a second cross-section identical along the entire second longitudinal axis.
17. delete

Description

Antenna The present invention relates to an antenna, in particular to an antenna for use in a vehicle designed to transmit key data for opening and/or starting the vehicle. Antennas generally consist of a ferromagnetic core and a coil. Antennas are typically housed within a housing. Depending on the transmission frequency and bandwidth, the core and coil must be designed accordingly. For example, in the case of UWB antennas, as the bandwidth and range of the antenna increase, it results in, for instance, increasingly longer cores. However, longer cores are more prone to breakage and cost more to manufacture than shorter cores. Accordingly, forming a core with a plurality of continuously arranged sub-cores is disclosed, for example, in US10056687, EP1397845, and US2018/159224. This has the advantage of making the manufacturing of individual sub-cores easier and reducing the possibility of sub-core breakage. However, the magnetic properties of a core formed from multiple sub-cores are highly sensitive to shock or temperature fluctuations, and such antennas have often been shown to have problems with the stability of antenna characteristics. Basically, softer potting compounds can be used to absorb shock better and reduce the possibility of breakage. However, to ensure that the stability of the antenna's electrical characteristics is not compromised, there are strict quality requirements for antenna component positioning that allow only very small tolerances. Therefore, the potting compound cannot be selected to be too soft. An alternative approach is disclosed in US10062484. In this method, magnetic threads are inserted into a non-magnetic soft material to form a flexible magnetic core. However, this flexible magnetic core has worse magnetic properties than a conventional (hard) magnetic core. FIG. 1 is a 3D drawing of a first embodiment of an antenna having a half-cut housing and a potting compound. FIG. 2 is a 3D drawing of a first embodiment of an antenna without a housing and potting compound. FIG. 3 is a 3D drawing of a first embodiment of an antenna without a core carrier, housing, and potting compound. FIG. 4 is a first cross-sectional view of an antenna according to a first embodiment. FIG. 5 is a plan view of an antenna according to a first embodiment. FIG. 6 is a second cross-sectional view of an antenna of the first embodiment following line DD. FIG. 7 is a third cross-sectional view of an antenna of the first embodiment along line EE. Fig. 8 is an enlarged view of section F of Fig. 1. FIGS. 1 to 8 illustrate embodiments of the present invention. The antenna includes a core (1), a coil (2), a housing, a core carrier (4), and a potting compound (5). The core (1) is a magnetic core. It is preferable that the core (1) extends along the longitudinal axis. The core (1) is preferably longer in the direction of the longitudinal axis than in other directions/axis (perpendicular to the longitudinal axis). The core (1) is made of a magnetic material. The core is preferably made of a ferrite material or a powder material (powder core), for example, a ferrite material. Magnetic material means that the material is at least paramagnetic, preferably ferromagnetic. The magnetic core (1) is made of a hard material, that is, the magnetic core (1) is not elastic or flexible. The magnetic core (1) preferably has a rectangular cross-section. The magnetic core is preferably composed of a plurality of sub-cores (1.1 and 1.2). The material properties of the aforementioned core (1) are correspondingly applied to each sub-core (1.1, 1.2). The same magnetic material is preferably used for different sub-cores (1.1 and 1.2). The plurality of sub-cores (1.1 and 1.2) includes at least two sub-cores (1.1 and 1.2) having a first sub-core (1.1) and a second sub-core (1.2). The first sub-core has a first longitudinal axis. The second sub-core has a second longitudinal axis. The first sub-core (1.1) and the second sub-core (1.2) are preferably arranged so that the second longitudinal axis extends as an extension of the first longitudinal axis (thus so that the first and second longitudinal axes form the longitudinal axis of the core (1). That is, the first and second longitudinal axes are not bent relative to each other, are positioned at 0° or 180° and/or are parallel/coaxial/overlapping. The first subcore (1.1) has a first end and a second end opposite the first end (in the direction of the first longitudinal axis). The second subcore (1.2) has a first end and a second end opposite the first end (in the direction of the second longitudinal axis). The first end of the first subcore (1.1) is preferably positioned opposite the first end of the second subcore (1.2). Accordingly, the second end of the first sub-core (1.1) forms the first end of the core (1), and when the core (1) is composed of two sub-cores (1.1, 1.2), the second end of the second sub-core (1.2) forms the second end of the core (1). The first sub-core (1.1) has a first