Synchronized RF Amplifier Chains for High-Power Pulsed Beam Steering
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Solution Overview
Problem
Existing high-power RF signal processing systems require large amounts of energy, resulting in significant radiated heat and the need for expensive circuitry and elaborate cooling mechanisms, making it challenging to produce high-power RF signals with low average power.
Innovation Solution
The system employs an RF signal generator to produce phase-shifted RF signals, which are then amplified by chains of solid-state power amplifiers with tunable gate voltages synchronized with the RF signals. This setup forms a steered composite RF signal with Megawatts of radiated power while minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If analog RF signal processing circuitry is used to produce high-power RF signals, then radiated power is increased, but energy consumption and radiated heat increase significantly
Solution Approach 1:
The patent employs pulsed RF signal generation where amplifiers are activated only during brief transmission intervals rather than continuously. This periodic operation allows the system to deliver high peak power during pulses while maintaining low average power consumption, directly resolving the contradiction between high radiated power and low energy consumption
Solution Approach 2:
The system dynamically adjusts amplifier operation states, switching between active and idle modes based on transmission requirements. This dynamic control enables the system to optimize the balance between radiated power output and energy consumption by activating full power only when needed and reducing power during non-transmission periods
2Power
If analog RF signal processing circuitry is used to produce high-power RF signals, then radiated power is increased, but radiated heat increases requiring elaborate cooling mechanisms
Solution Approach 1:
By using pulsed operation instead of continuous operation, the system generates high power only during brief intervals, significantly reducing the total heat generated over time. This periodic action allows the cooling system to handle thermal loads more effectively, eliminating the need for elaborate continuous cooling mechanisms
Solution Approach 2:
The patent extracts and removes the continuous power consumption requirement, keeping only the brief pulsed power delivery needed for transmission. This extraction of the continuous operation requirement directly reduces the thermal load that would otherwise require elaborate cooling systems
3Power
If analog RF signal processing circuitry is used, then high-power RF signals can be produced, but circuit cost increases requiring expensively rated circuits
Solution Approach 1:
The pulsed operation regime allows the use of lower-power-rated, less expensive amplifier circuits that can handle high peak power during brief intervals but would overheat or fail under continuous high-power operation. This temporal separation of peak power delivery from average power handling enables cost-effective circuit design
Data Source
AI summary
An apparatus has a Radio Frequency (RF) signal generator to produce RF signals phase shifted relative to one another in accordance with RF frequency waveform parameters. Amplifier chains process the RF signals to produce channels of amplified RF signals. Each amplifier chain has amplifiers and at least one amplifier has a tunable gate voltage synchronized with the RF signals.