RF Supply Modulator Circuit for Compact Dual-Polarization ET Amplifiers
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Solution Overview
Problem
Power amplification systems in radio frequency circuits, particularly those operating in ET mode, require a power amplifier and a tracker circuit, leading to increased size, especially when transmitting radio frequency signals in millimeter wave or sub-terahertz bands, necessitating a vertical and horizontal polarization transmission path.
Innovation Solution
A radio frequency circuit and module design incorporating a switched-capacitor circuit to generate discrete voltages for power amplifiers, with supply modulators to selectively output these voltages to power amplifiers connected to vertical and horizontal polarization antennas, reducing the size of the circuit and module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a power amplifier and tracker circuit are used for ET mode power amplification, then power amplification efficiency is improved, but the device size increases
Solution Approach 1:
The patent combines the tracker circuit and power amplifier into a single integrated circuit module. The tracker circuit includes a switched-capacitor circuit and supply modulators that are integrated with multiple power amplifiers on the same substrate, eliminating the need for separate discrete circuits and reducing overall device size while maintaining ET mode efficiency
Solution Approach 2:
The integrated tracker circuit is designed to support multiple power amplifiers simultaneously, with each power amplifier having its own supply modulator. This multi-functional design allows a single tracker circuit to serve multiple amplification functions, reducing the need for separate circuits for each power amplifier and thereby reducing overall circuit size
2Adaptability or versatility
If vertical and horizontal polarization transmission paths are implemented for millimeter wave or sub-terahertz band transmission, then transmission capability is improved, but the device size increases
Solution Approach 1:
The patent integrates multiple power amplifiers with different polarization capabilities into a single circuit module. The first power amplifier is connected to a first antenna for vertical polarization, while the second power amplifier is connected to a second antenna for horizontal polarization. By combining these amplifiers and their control circuits into one integrated module, the patent achieves multi-polarization transmission capability without proportionally increasing device size
Solution Approach 2:
The patent utilizes spatial arrangement of multiple antennas with different polarization orientations (vertical and horizontal) to achieve diverse transmission paths. This dimensional approach to signal transmission allows the system to support multiple polarization modes simultaneously through physically separated but integrated amplifier circuits, maintaining compact form factor while expanding transmission capability
3Adaptability or versatility
If multiple power amplifiers with separate tracker circuits are used for multi-polarization transmission, then transmission versatility is improved, but device complexity increases
Solution Approach 1:
The tracker circuit is designed as a universal control unit that manages multiple power amplifiers through individual supply modulators. Each power amplifier has its own supply modulator that receives control signals from the integrated tracker circuit, allowing a single tracker to universally control multiple amplifiers with different polarization functions, thereby reducing overall system complexity
Solution Approach 2:
The tracker circuit is segmented into multiple supply modulators, with each modulator dedicated to controlling a specific power amplifier. This segmentation allows independent control of each amplifier while maintaining a unified integrated structure, reducing the complexity that would arise from fully separate tracker circuits for each amplifier
Data Source
AI summary
A radio frequency circuit is provided that includes a power amplifier connected to an first antenna, a power amplifier connected to a second antenna, a switched-capacitor circuit configured to generate a plurality of discrete voltages based on an input voltage, a first supply modulator configured to selectively output at least one voltage of the plurality of discrete voltages to the power amplifier, and a second supply modulator configured to selectively output at least one voltage of the plurality of discrete voltages to the power amplifier.