3D Modular Power Amplifier Layout for RF Power Density and EMI Control
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Solution Overview
Problem
Existing RF amplifier systems face challenges in achieving high power density, compactness, scalability, improved cooling, and reduced electromagnetic interference, which are crucial for applications in industry, defense, radar, and communications.
Innovation Solution
A modular power amplifier system is designed with a power amplifier subsystem that includes 90-degree hybrid blocks for signal splitting and combining, high-power amplifiers, a power distribution module for power regulation, and a power sequencer for timing control, along with differential antennas and a 3D configuration to reduce electromagnetic interference and enhance cooling.
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 circuit board becomes of significant size
Solution Approach 1:
The patent transitions from traditional 2D planar amplifier arrays on circuit boards to a 3D volumetric configuration using radial and Gysel combiners. This dimensional change allows amplifiers to be arranged in three-dimensional space around a central combiner structure, significantly reducing the footprint area while accommodating the same number of amplifiers. The 3D arrangement enables compact integration of multiple amplifier modules around a central hub.
Solution Approach 2:
The patent implements a nested structure where amplifier modules are arranged concentrically around a central combiner. The combiner structure serves as the inner core, with amplifier modules nested around it in radial patterns. This nesting approach maximizes space utilization and reduces overall system area while maintaining signal integrity and power distribution efficiency.
2Reliability
If radial combiners or Gysel combiners are used for RF amplification, then some degree of redundancy is achieved, but the combiners are connectorized making them difficult to repair
Solution Approach 1:
The patent divides the combiner system into modular, replaceable segments. Each combiner module is designed as an independent unit with standardized interfaces, allowing individual modules to be replaced without affecting the entire system. This segmentation enables easy repair by swapping out faulty modules while maintaining system redundancy and reliability.
Solution Approach 2:
The patent designs universal combiner modules that can serve multiple functions and be used in various positions within the amplifier array. These standardized modules with consistent interfaces allow any module to replace any other, simplifying repair operations and inventory management while maintaining system redundancy.
3Power
If high power density and compactness are achieved through modular design, then scalability is improved, but electromagnetic interference between amplifiers increases
Solution Approach 1:
The patent applies local quality principles by providing targeted electromagnetic shielding and isolation between adjacent amplifier modules. Each module is equipped with localized shielding structures and filtering elements at critical interfaces, allowing compact arrangement while mitigating EMI. This localized approach to EMI control enables high power density without sacrificing system reliability.
Data Source
AI summary
Systems and apparatuses are disclosed that include a modular power amplifier having a power amplifier subsystem with a first 90 degree hybrid block configured to receive an RF signal and output a split RF signal with components having a 90 degree phase shift, a second 90 degree hybrid block configured to receive and combine the split RF signal by removing the 90 degree phase shift, a high-power amplifier configured to amplify at least one of the components of the split RF signal. The modular power amplifier also includes a power distribution module configured to regulate an amount of power input to the high-power amplifier and a power sequencer configured to control the timing of power delivery by the power distribution module. Three-dimensional power amplifiers having a first high-power amplifier and a second high-power amplifier having different orientations causing a reduction in electromagnetic interference are also disclosed.