Antenna RF Module Reflector Layout for Front-Rear Heat Dissipation
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Solution Overview
Problem
Existing antenna designs face challenges with heat dissipation due to the presence of a radome, which obstructs front-direction heat dissipation and complicates miniaturization and cost reduction in base station antennas, especially for 5G applications.
Innovation Solution
The antenna RF module is designed without a radome, with a reflector integrated between the RF filter and radiation element to ground the radiation element and dissipate heat externally, using a metal material for manufacturing and grill pins for enhanced heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radome is installed on the front end portion of the antenna housing to protect components, then protection from outside environment is improved, but heat dissipation performance deteriorates because the radome obstructs heat dissipation toward the front direction
Solution Approach 1:
The radome is completely removed from the antenna housing front end portion. This extraction eliminates the obstacle that was blocking heat dissipation toward the front direction, allowing heat to be efficiently discharged from the heat generating component through the front surface of the antenna housing without interruption.
Solution Approach 2:
The front end portion of the antenna housing is given multiple functions: it serves as both the protective enclosure structure and the heat dissipation path. By removing the radome, the housing itself performs the heat dissipation function that would otherwise require a separate mechanism, while still providing structural protection for internal components.
2Reliability
If the radiation element is spaced away from the front surface of the antenna board, then transmission and reception of RF signal is improved, but the volume occupied by arrangement structure increases making miniaturization difficult
Solution Approach 1:
The radiation element is positioned at the front surface of the antenna board rather than being spaced away in the depth direction. This dimensional repositioning allows the radiation element to maintain its RF signal transmission and reception functionality while significantly reducing the volume occupied by the arrangement structure, enabling antenna housing miniaturization.
3Device complexity
If heat generating components are arranged inside the antenna housing, then integration is improved, but heat dissipation becomes difficult requiring uniform discharge to rear direction only
Solution Approach 1:
The heat dissipation path is extended from the rear direction only to include both front and rear directions. The heat generating component is thermally coupled to the antenna housing such that heat can flow to both front and rear surfaces, effectively doubling the heat dissipation capability while maintaining component integration inside the housing.
4Reliability
If a radome is installed to protect components, then protection function is improved, but manufacturing cost increases and maintenance becomes more difficult
Solution Approach 1:
The radome is completely removed from the design, eliminating the associated manufacturing costs and simplifying the overall structure. The protective function is redistributed to the antenna housing structure itself, which requires no additional components while reducing manufacturing complexity and cost.
Solution Approach 2:
The antenna housing is designed to perform multiple functions simultaneously: structural enclosure, heat dissipation, and protective shielding for internal components. This multi-functionality eliminates the need for separate protective radome components, reducing manufacturing cost and simplifying maintenance procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves heat dissipation performance by allowing heat to be dissipated in both forward and rear directions, reduces manufacturing costs, and facilitates easier maintenance by allowing individual RF module replacement, while also enabling thinner product designs.
Implementation Method 1
a reflector integrally formed on the RF filter and arranged between the RF filter and the radiation element module in such a manner as to ground (GND) the radiation element module and, at the same time, to serve as an intermediary for dissipating heat generated in the RF filter to the outside
Implementation Method 2
dissipating heat generated in the RF filter to the outside air in front that is defined as being a space in front of the front surface of the front housing
Data Source
AI summary
The present disclosure relates to an antenna RF module, an RF module assembly including the antenna RF modules, and an antenna apparatus including the RF module assembly. The antenna RF module includes an RF filter arranged on a front surface of a main board, a radiation element module arranged on a first side of the RF filter, and a reflector arranged between the RF filter and the radiation element module in such a manner as to ground (GND) the radiation element module and, at the same time, to serve as an intermediary for dissipating heat generated in the RF filter to the outside. Accordingly, a radome that interrupts dissipation of heat to in front of an antenna is unnecessary, and heat generated from heat generating elements of the antenna apparatus is spatially separated. Thus, it is possible that the heat is dissipated in a distributed manner toward the front and rear directions of the antenna apparatus. The advantage of greatly improving performance in heat dissipation can be achieved. Moreover, the advantage of improving the ease with which the antenna RF module is assembled can be achieved.