Modular RF Power Amplifier Architecture for EMI and VSWR Protection
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Solution Overview
Problem
Existing RF amplifier systems are large, difficult to repair due to connectorization, and suffer from electromagnetic interference and inefficient power distribution, leading to reduced efficiency and potential damage from voltage standing wave ratio (VSWR) issues.
Innovation Solution
A modular power amplifier system with 90-degree hybrid blocks, high-power amplifiers, and a power distribution module that regulates power input and a power sequencer controlling timing, along with a differential antenna and three-dimensional configuration to reduce EMI and improve cooling, using a power management system for efficient amplifier control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If amplifier arrays are arranged in a 2D configuration on a circuit board, then the required number of amplifiers can be contained, but the system becomes of significant size
Solution Approach 1:
The patent transitions from traditional 2D planar arrangements of amplifiers on circuit boards to a 3D spatial configuration using radial and Gysel combiners. This dimensional change allows multiple amplifiers to be arranged in a radial pattern around a central combiner, significantly reducing the footprint area while maintaining the required number of amplifier elements.
Solution Approach 2:
The patent combines multiple amplifier outputs through radial and Gysel combiners into a single integrated structure. By merging the signal paths of multiple amplifiers through these combiners, the system achieves compact integration without requiring separate circuit boards for each amplifier, thus reducing overall system size.
2Reliability
If radial combiners or Gysel combiners are used, then some degree of redundancy is allowed, but they are connectorized making them difficult to repair
Solution Approach 1:
The patent divides the amplifier system into modular segments where individual amplifiers can be independently replaced. The combiner structures are designed as separate modular units that can be independently serviced. This segmentation allows faulty amplifiers to be replaced without affecting the combiner or other amplifiers, significantly improving repairability while maintaining system redundancy.
Solution Approach 2:
The modular architecture enables field-replaceable units where operators can perform self-service repairs by simply swapping out failed amplifier modules or combiner units without requiring complex diagnostic equipment or specialized repair procedures. The system is designed for easy hot-swapping and field replacement.
3Power
If traditional power distribution is used, then power can be delivered to amplifiers, but voltage standing wave ratio issues cause potential damage and reduced efficiency
Solution Approach 1:
The patent incorporates VSWR sensing and reflection coefficient monitoring that provides feedback to the power distribution system. When VSWR exceeds predetermined thresholds, the system automatically adjusts power delivery or shuts down affected channels to prevent damage. This feedback mechanism protects the amplifiers and combiners from voltage standing wave ratio issues while maintaining efficient power distribution under normal operating conditions.
Data Source
AI summary
Systems and apparatuses are disclosed that include an RF generator configured to generate RF signals having a wavelength. Amplifiers are configured to receive and amplify the RF signals from the RF generator and are separated from each other by a separation distance in a range between about 0.2 times the wavelength and about 10.0 times the wavelength. A power management system is configured to control one or more of the amplifiers based on information received that is associated with the RF signals.