Radio heatsink, radio unit, and base station

Patent metadata

Field	Value
Publication number	US-12489193-B2
Application number	US-202118271405-A
Country	US
Kind code	B2
Filing date	Apr 1, 2021
Priority date	Jan 8, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A radio heatsink, a radio unit, and a base station are disclosed. According to an embodiment, the radio heatsink ( 10 ) comprises a heatsink base ( 11 ) and a plurality of heatsink fins ( 12 ) extending from a first side of the heatsink base ( 11 ), wherein at least one portion ( 13 ) of the heatsink base ( 11 ) bulges at the first side toward the heatsink fins ( 12 ), a recess ( 14 ) opening to a second side of the heatsink base ( 11 ) that is opposite to the first side is formed at the portion ( 13 ), and the radio heatsink ( 10 ) further comprises a metal cavity filter ( 40 ) integrated with the heatsink base ( 11 ). According to another embodiment, the metal cavity filter ( 40 ) is separately formed and then inserted into the recess ( 14 ).

First claim

What is claimed is:

1 . A radio heatsink comprising:
a heatsink base having a first side and a second side that is opposite to the first side; a plurality of heatsink fins attached to the first side of the heatsink base and extending in a direction away from the first side of the heatsink base, wherein at least a first portion of the heatsink base bulges in the direction in which the heatsink fins are extending, thereby forming a recess; and a metal cavity filter positioned within the recess of the radio heatsink.

2 . The radio heatsink according to claim 1 , wherein
the metal cavity filter comprises a plurality of cavities each including at least one resonant column, and a peripheral wall and a bottom wall of the metal cavity filter, separation walls between adjacent cavities, as well as the resonant columns are made integral with the heatsink base.

3 . The radio heatsink according to claim 1 , wherein the recess is covered with a metal sheet functioning as a filter cover.

4 . A radio unit comprising a radio board and the radio heatsink according to claim 1 , wherein a first surface of the radio board is assembled with the heatsink base of the radio heatsink at the second side of the heatsink base.

5 . The radio unit according claim 4 , wherein radio elements are disposed on the first surface of the radio board.

6 . The radio unit according to claim 5 , wherein
the metal cavity filter is spaced from the first surface of the radio board, and a distance between the metal cavity filter and the first surface of the radio board is set such that one or more of the radio elements at least partially protrude into the recess of the heatsink base.

7 . The radio unit according to claim 4 , wherein antenna elements are disposed on the second surface of the radio board that is opposite to the first surface.

8 . The radio unit according to claim 4 , wherein the metal cavity filter is connected to the radio board through RF connectors.

9 . The radio unit according to claim 8 , wherein
a first RF connector serves as input to the metal cavity filter, and a second RF connector serves as output from the metal cavity filter.

10 . The radio unit according to claim 9 , wherein a distance between the first RF connector and the second RF connector is set such that one or more of the radio elements at least partially protrude into the recess of the heatsink base.

11 . The radio unit according to claim 8 , wherein each of the RF connectors is a contact pin or a mini pogo-pin.

12 . A radio unit comprising:
a radio board; a radio heatsink comprising a heatsink base having a first side and a second side that is opposite to the first side and a plurality of heatsink fins attached to the first side of the heatsink base and extending in a direction away from the first side of the heatsink base, wherein at least a first portion of the heatsink base bulges in the direction in which the heatsink fins are extending, thereby forming a recess; and a metal cavity filter positioned within the recess of the radio heatsink, wherein a first surface of the radio board is assembled with the heatsink base of the radio heatsink at the second side of the heatsink base.

13 . A radio unit comprising:
a circuit board having a first side and a second side opposite the first side, the first side of the circuit board having a first portion, a second portion, and a third portion; a heatsink comprising:
a first portion having a first side and a second side opposite the first side, the first side of the first portion of the heatsink facing and abutting the first portion of the first side of the circuit board;
a second portion having a first side and a second side opposite the first side, the first side of the second portion of the heatsink facing the second portion of the first side of the circuit board and spaced apart from the second portion of the first side of the circuit board by a distance of d units of distance, where d>0, thereby forming a gap between the first side of the second portion of the heatsink and the first side of the second portion of the circuit board;
a third portion having a first side and a second side opposite the first side, the first side of the third portion of the heatsink facing and abutting the third portion of the first side of the circuit board;
a first plurality of heatsink fins attached to the second side of the first portion of the heatsink; and
a second plurality of heatsink fins attached to the second side of the third portion of the heatsink; and
a metal cavity filter positioned in the gap between the first side of the second portion of the heatsink and the first side of the second portion of the circuit board.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Sun Xuejun

Classifications

• H01Q1/24

  with receiving set · CPC title

• H01P1/207

  Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H05K7/20409

  Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing · CPC title

• H01P11/007

  Manufacturing frequency-selective devices (resonators H01P11/008) · CPC title

• H01Q1/246

  specially adapted for base stations · CPC title