Multi-amplifier Power Management Circuit for mmWave Heat Dissipation
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Solution Overview
Problem
5G-NR capable mobile communication devices face challenges with RF signal attenuation and heat dissipation due to suboptimal efficiency of power amplifiers and metal housing degradation, which affects radiation efficiency and increases heat dissipation.
Innovation Solution
A multi-amplifier power management circuit with physically separated transceiver and amplifier circuits, where the amplifier circuit is collocated with transmit antennas closer to the device edge, reducing RF signal radiation distance and eliminating RF switch circuits to improve radiation efficiency and reduce heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power amplifiers are used in the amplifier array to transmit RF signals in mmWave spectrum, then data rates and coverage range are improved, but excessive heat is generated when operating at suboptimal efficiency
Solution Approach 1:
The amplifier array is segmented into multiple individual power amplifiers distributed across the device, each handling a portion of the total RF signal power. This segmentation allows for improved heat distribution and management while maintaining the overall productivity benefits of high-power transmission.
Solution Approach 2:
The patent transitions from a conventional centralized amplifier configuration to a distributed three-dimensional amplifier array configuration. By arranging amplifiers in multiple dimensions across the device, the system achieves better heat dissipation pathways while maintaining transmission capability.
2Productivity
If amplifier array is used to shape RF signal into directional beam for mmWave transmission, then signal transmission capability is improved, but RF signal radiation efficiency is degraded due to metal housing
Solution Approach 1:
The patent extracts the amplifier array from the conventional metal housing enclosure and positions it in proximity to the antenna elements, effectively separating the amplification function from the metallic structure that causes RF shielding effects. This extraction eliminates the harmful interaction between the metal housing and RF signals.
Solution Approach 2:
The patent introduces non-conductive spacing structures as intermediaries between the amplifier array and the metal housing, preventing direct RF coupling with the metallic structure. These intermediary elements allow the amplifier array to operate without the harmful shielding effects of the metal housing while maintaining structural integrity.
3Loss of energy
If amplifier circuit is collocated with transmit antennas closer to device edge, then radiation efficiency is improved by reducing RF signal radiation distance, but device structural complexity increases
Solution Approach 1:
The amplifier circuit is segmented into multiple discrete amplifier modules that can be independently positioned near individual antenna elements. This modular segmentation enables the amplifiers to be collocated with antennas for optimal radiation efficiency while maintaining manageable structural complexity through standardization.
Solution Approach 2:
The patent repositions the amplifier array from a conventional planar configuration to a three-dimensional distribution near the device edges. By utilizing vertical and lateral dimensions, the system achieves shorter RF paths to antennas without requiring complex reconfiguration of existing device architecture.
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 configuration enhances radiation efficiency, reduces heat dissipation, and minimizes insertion losses in the 28 GHz mmWave spectrum by approximately 1 dB, improving overall performance and user experience.
Implementation Method 1
a number of amplifiers configured to amplify the RF transmit signals based on a number of modulated voltages
Implementation Method 2
The transmit antenna ports are configured to output the RF transmit signals to a transmit antenna circuit
Data Source
AI summary
A multi-amplifier power management circuit and related apparatus are provided. The multi-amplifier power management circuit includes a transceiver circuit and an amplifier circuit, which are physically separated (e.g., in different integrated circuits). The amplifier circuit receives a radio frequency (RF) signal from the transceiver circuit and splits the RF signal into a number of RF transmit signals. The amplifier circuit includes a number of amplifiers configured to amplify the RF transmit signals. In examples discussed herein, the multi-amplifier power management circuit can be provided in an apparatus (e.g., a mobile communication device). The amplifier circuit may be collocated with a number of transmit antennas closer to an edge(s) of the apparatus. By collocating the amplifier circuit and the transmit antennas closer to the edge(s) of the apparatus, it may be possible to reduce RF signal radiation distance, thus helping to improve radiation efficiency and reduce heat dissipation in the apparatus.