Power Amplifier Calibration Using Reference Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing complexity of designing communication systems due to scarce and congested frequency bands, along with the need for consistent performance across integrated systems, poses challenges in reliably operating communication devices.
Innovation Solution
A method and system for calibrating a power amplifier using reference signals to characterize a signal strength indicator, allowing for adjustments over a range of frequencies and signal strengths, ensuring accurate power output and compliance with regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If integrated systems are used to reduce product cost and size, then manufacturing cost and device size are reduced, but performance consistency between lots and wafers deteriorates
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements and characterizing the power amplifier's performance before final product assembly and deployment. The system pre-determines calibration data across multiple frequency points and power levels, storing this information in lookup tables that will be used during operation to compensate for fabrication variations.
Solution Approach 2:
The patent employs parameter changes by systematically varying operating conditions (frequency, input power level) during calibration to map the amplifier's performance characteristics. The system measures and records how the amplifier responds across different parameters, then uses this data to adjust and equalize performance consistency across production batches.
2Ease of manufacture
If more functionality is integrated into smaller chips, then product cost is reduced, but design complexity and characterization effort increase
Solution Approach 1:
The patent applies self-service by enabling the power amplifier to calibrate itself through automated measurements and adjustments. The system uses the amplifier's own output signals, fed back through a coupler and attenuator, to automatically characterize its performance and generate calibration data without requiring external manual testing or complex external equipment.
Solution Approach 2:
The patent employs universality by designing a calibration system that can operate across multiple frequency bands and power levels using the same hardware infrastructure. The lookup table approach allows a single calibration setup to serve multiple operating conditions, reducing the need for separate characterization equipment for each frequency or power level.
3Power
If power amplifier output is increased to meet communication demands, then transmission capability is improved, but measurement accuracy of signal strength deteriorates
Solution Approach 1:
The patent applies the intermediary principle by introducing a coupler and attenuator as mediator components between the high-power amplifier output and the measurement system. The coupler extracts a small portion of the amplifier's output signal, and the attenuator further reduces this signal to a safe and measurable level, enabling accurate measurement of signal strength across the full power range without exposing the measurement equipment to excessive power levels.
Data Source
AI summary
Aspects of a method and system for calibrating a power amplifier are provided. In this regard, one or more reference signals may be generated and may be utilized to characterize a signal strength indicator (SSI). Additionally, measurements of power output by a power amplifier by the SSI may be corrected based on the characterization of the SSI. Accordingly, the power amplifier may be adjusted based on the corrected measurements. The reference signals utilized to characterize the SSI may be limited to a determined range. In this regard, signal strength of the reference signals, as measured by the SSI, may be compared to the expected signal strength in order to characterize the SSI. The SSI may be characterized over a range of frequencies and/or signal strengths. Similarly the power amplifier may be adjusted over a range of frequencies and/or signal strengths.