Cover and vehicle-mounted fin type antenna device

Patent metadata

Field	Value
Publication number	US-11133579-B2
Application number	US-201816649168-A
Country	US
Kind code	B2
Filing date	Oct 18, 2018
Priority date	Oct 18, 2017
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

A vehicle-mounted fin type antenna device 1 includes a plurality of antenna units 5a to 5d, a circuit board 4 electrically connected to the plurality of antenna units 5a to 5d, and a radome 3 accommodating the plurality of antenna units 5a to 5d and the circuit board 4 in an inside of the radome. The radome 3 is formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100° C. or more.

First claim

The invention claimed is:

1. A cover formed as a housing that protects an electromagnetism/electromagnetic wave generator and is capable of transmitting electromagnetism/electromagnetic waves generated from the electromagnetism/electromagnetic wave generator, wherein
the housing is formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100° C. or more.

2. The cover according to claim 1 , further comprising a dielectric loss tangent of the resin material is 0.01 or less.

3. The cover according to claim 1 , wherein the base resin of the resin material is any of PMP, LCP, PPS, or PBT.

4. The cover according to claim 1 , wherein the base resin of the resin material is LCP having a repeating structural unit represented by the following Chemical Formula 1,

wherein, in this Chemical Formula 1, n represents 0 or 1, and x, y, and z each represent an arbitrary integer.

5. The cover according to claim 1 , wherein the base resin of the resin material is LCP having a repeating structural unit represented by the following Chemical Formula 2,

wherein, in this Chemical Formula 2, x and y each represent an arbitrary integer.

6. A vehicle-mounted fin type antenna device comprising a plurality of antenna units; a circuit board electrically connected to the plurality of antenna units; and a radome accommodating the plurality of antenna units and the circuit board in an inside of the radome, wherein
the radome is formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100° C. or more.

7. The vehicle-mounted fin type antenna device according to claim 6 , wherein the plurality of antenna units are four or more.

8. The vehicle-mounted fin type antenna device according to claim 6 , wherein the plurality of antenna units include a keyless entry antenna unit.

9. The vehicle-mounted fin type antenna device according to claim 6 , further comprising a filler is enclosed inside the radome and the plurality of antenna units are integrally held by the filler.

10. The vehicle-mounted fin type antenna device according to claim 9 , wherein the filler is formed of a foaming material.

11. The vehicle-mounted fin type antenna device according to claim 9 , further comprising a dielectric loss tangent of the filler is 0.02 or less.

12. The vehicle-mounted fin type antenna device according to claim 6 , further comprising a dielectric loss tangent of the resin material is 0.01 or less.

13. The vehicle-mounted fin type antenna device according to claim 6 , wherein the base resin of the resin material is any of PMP, LCP, PPS, or PBT.

14. The vehicle-mounted fin type antenna device according to claim 6 , wherein the base resin of the resin material is LCP having a repeating structural unit represented by the following Chemical Formula 3,

wherein, in this Chemical Formula 3, n represents 0 or 1, and x, y, and z each represent an arbitrary integer.

15. The vehicle-mounted fin type antenna device according to claim 6 , wherein the base resin of the resin material is LCP having a repeating structural unit represented by the following Chemical Formula 4,

wherein, in this Chemical Formula 4, x and y each represent an arbitrary integer.

16. The vehicle-mounted fin type antenna device according to claim 6 , wherein the radome is provided with a waterproof-breathable filter.

Assignees

• Ntn Toyo Bearing Co Ltd

Inventors

• Sonozaki Tomokazu
• Mori Natsuhiko
• Satoji Fuminori
• Shibahara Katsuo

Classifications

• H01Q1/3275 Primary

  mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk · CPC title

• H01Q1/42

  Housings not intimately mechanically associated with radiating elements, e.g. radome · CPC title

• C08G63/065

  the hydroxy and carboxylic ester groups being bound to aromatic rings · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q1/40

  Radiating elements coated with or embedded in protective material · CPC title