Heat dissipation from a mobile radio antenna for connection to at least one base station

Patent metadata

Field	Value
Publication number	US-2021203061-A1
Application number	US-201917058359-A
Country	US
Kind code	A1
Filing date	May 22, 2019
Priority date	May 24, 2018
Publication date	Jul 1, 2021
Grant date	—

Abstract

A mobile communication antenna comprises a radome, a reflector arrangement, mobile communication radiators, and at least one electronic module. The radiators are arranged on a front side and the at least one electronic module is arranged on a rear side of the reflector arrangement. At least one electronic module comprises an electronic unit and a module housing within which the electronic unit is arranged. The module housing is made of metal and comprises a front side, a rear side, end faces and side walls, wherein the front side of the module housing points in the direction of the radome and the rear side of the module housing points in the direction of the rear side of the reflector arrangement. At least the surface of the front side and/or the rear side of the module housing is at least predominantly coated with a heat emission layer.

First claim

1 . A mobile communication antenna for connecting to at least one base station, comprising the following features:
a radome, a reflector arrangement, a plurality of mobile communication radiators and at least one or more electronic modules are provided; the radome comprises a front wall, a rear wall and side walls; the reflector arrangement, the plurality of mobile communication radiators and the at least one or more electronic modules are arranged inside the radome; the plurality of mobile communication radiators are arranged on a front side of the reflector arrangement; the at least one or more electronic modules are arranged on a rear side of the reflector arrangement; at least one electronic module comprises an electronic unit and a module housing, the electronic unit being arranged in the module housing; the module housing of the at least one electronic module is made of metal or a metal alloy and comprises a front side, a rear side, end faces and side walls, wherein the front side of the module housing of the at least one electronic module points in the direction of the rear wall of the radome and the rear side of the module housing of the at least one electronic module is opposite the front side of the module housing of the at least one electronic module and points towards the front wall of the radome; at least the surface of the front side and/or the rear side of the module housing of the at least one electronic module is at least predominantly coated with a heat emission layer which has an emissivity ε, with ε≥0.6.

2 . (canceled)

3 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the heat emission layer is formed by a lacquer or the heat emission layer is formed by spray lacquer; or the heat emission layer is formed by wrinkle paint.

4 . (canceled)

5 . (canceled)

6 . The mobile communication antenna according to claim 3 , characterized by the following feature:
the lacquer comprises a hill-and-dale structure with different layer thicknesses, wherein a difference between a layer with lower thickness and a layer with higher thickness is greater than 100 μm.

7 . The mobile communication antenna according to claim 3 , characterized by the following feature:
a layer thickness of the heat emission layer is greater than 100 μm or 150 μm or 200 μm or 250 μm or 300 μm but preferably less than 500 μm or 450 μm or 400 μm or 350 μm or 300 μm or 250 μm.

8 . (canceled)

9 . (canceled)

10 . The mobile communication antenna according to claim 3 , characterized by the following feature:
the heat emission layer consists of several layers of lacquer.

11 . The mobile communication antenna according to claim 3 , characterized by the following feature:
the surface of at least the front side and/or the rear side of the module housing of the at least one electronic module below the heat emission layer is smooth, wherein the class of roughness is preferably smaller than N11.

12 . (canceled)

13 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the heat emission layer is a sticker unit.

14 . (canceled)

15 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the heat emission layer is an anodized layer.

16 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the heat emission layer is electrically non-conductive.

17 . (canceled)

18 . The mobile communication antenna according to claim 1 , characterized by the following feature:
at least one spacer is provided, wherein the at least one spacer is arranged between the module housing of the at least one electronic module and the reflector arrangement, whereby the module housing of the at least one electronic module is arranged at a distance from the reflector arrangement; the at least one spacer consists of a dielectric and has a thermal conductivity of less than 6 W/mK.

19 - 24 . (canceled)

25 . The mobile communication antenna according to claim 1 , characterized by the following feature:
at least a part of the module housing of the at least one electronic module is an extruded part or a cast part.

26 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the at least one electronic module is fanless; and/or the mobile communication antenna is fanless; or the mobile communication antenna comprises one or more fans.

27 . (canceled)

28 . (canceled)

29 . The mobile communication antenna according to claim 1 , characterized by the following feature:
more than 50%, 60%, 70%, 80%, 90% of the surface of at least the front side and/or the rear side of the module housing of the at least one electronic module is/are coated with the heat emission layer.

30 . The mobile communication antenna according to claim 1 , characterized by the following feature:
at least one partial area of the surface of the front side and/or the rear side of the module housing of the at least one electronic module is excluded from the coating with the heat emission layer, wherein the at least one partial area is that whose temperature is below a temperature threshold value during normal operation.

31 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the front side and/or the rear side of the module housing of the at least one electronic module is/are completely coated with the heat emission layer.

32 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the end faces and/or the side walls of the module housing of the at least one electronic module are partially, predominantly or completely coated with the heat emission layer.

33 . The mobile communication antenna according to claim 1 , characterized by the following feature:
inner sides of the module housing of the at least one electronic module are predominantly or completely free of a heat emission layer; or inner sides of the module housing of the at least one electronic module are predominantly or completely coated with the heat emission layer.

34 . (canceled)

35 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the front side and/or rear side of the reflector arrangement is/are partially, predominantly or completely coated with a heat emission layer.

36 . The mobile communication antenna according to claim 1 , characterized by the following feature:
a heat dissipation of the at least one electronic module is achieved by more than 40% or 50% or 60% or 70% via emission radiation.

37 . The mobile communication antenna according to claim 1 , characterized by the following feature:
the at least one electronic module is a combiner or a splitter or a phase shifter or a shielding cover or a power supply unit or a motor or a power splitter or a bias tee or a filter.

38 . (canceled)

Assignees

• Ericsson Telefon Ab L M

Inventors

• Gerlinger Thomas
• Fahrenschon Josef

Classifications

• H01Q1/02

  Arrangements for de-icing; Arrangements for drying-out {; Arrangements for cooling; Arrangements for preventing corrosion} · CPC title

• H01Q1/246 Primary

  specially adapted for base stations · CPC title

• H01Q15/14

  Reflecting surfaces; Equivalent structures {(electromagnetic shields H01Q1/526)} · CPC title

• H01Q1/42

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

• H04W88/08

  Access point devices · CPC title