RF Component Performance Measurement Using Radiated Spurious Energy
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Solution Overview
Problem
Portable communication devices used by public safety personnel often suffer from damaged, incorrectly installed, or mismatched components, which can lead to degraded radio communications that are not immediately apparent and may only be detected during use, causing interruptions and inefficiencies in communication.
Innovation Solution
The system measures radiofrequency component performance using radiated spurious energy, allowing for regular checks on antenna and component performance without additional hardware, and generates alerts when faults are detected, enabling proactive maintenance and reducing the likelihood of communication disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical inspection or testing is performed to detect damaged or incorrectly installed components, then component performance can be verified, but the device must be taken out of service and additional testing equipment is required
Solution Approach 1:
The communication device performs self-diagnostics by using its own internal spurious signal emissions to test antenna and component performance. The device tunes to self-quieting channels where its own radiated spurious energy can be measured, eliminating the need for external testing equipment and allowing continuous monitoring without removing the device from service.
Solution Approach 2:
The system performs preliminary performance checks by continuously monitoring spurious signal emissions before actual communication failures occur. By detecting degradation in antenna or component performance through spurious signal measurements, the system can alert users to potential issues before they critically impact communication reliability.
2Reliability
If additional hardware is added to measure voltage standing wave ratio for component monitoring, then component performance can be tracked, but device complexity and cost increase
Solution Approach 1:
The communication device uses its own existing spurious signal emissions as the test signal source, eliminating the need for external signal generators or additional measurement hardware. The device's internal oscillator and amplifier circuits naturally produce spurious signals that can be used to characterize antenna and component performance without adding any external equipment.
Solution Approach 2:
The spurious signal measurement system serves multiple functions: it characterizes antenna performance, detects component damage, verifies correct component installation, and monitors device health over time. This single measurement approach provides comprehensive diagnostic capability without requiring separate specialized hardware for each function.
3Reliability
If component testing is performed frequently to ensure reliable communication, then communication reliability improves, but loss of time for testing and device unavailability increases
Solution Approach 1:
The system enables continuous monitoring of component and antenna performance by repeatedly measuring spurious signal emissions at scheduled intervals. This continuous diagnostic action ensures communication reliability is maintained without requiring periodic removal of the device from service, as measurements are performed while the device remains in normal operation.
Solution Approach 2:
The device performs periodic self-diagnostics by tuning to self-quieting channels at scheduled intervals to measure spurious signal emissions. This periodic measurement approach provides regular performance verification without requiring continuous testing, balancing monitoring frequency with device availability and power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for continuous monitoring of communication device health, reducing the risk of unexpected failures and enabling timely intervention, thereby ensuring reliable communication services for public safety personnel.
Implementation Method 1
While operating, a portable communication device emits spurious radiofrequency signals. Such emissions may be of sufficient strength that they escape radiate out of the portable communication device, and are coupled to the external antenna.
Data Source
AI summary
Systems and methods for radiofrequency component performance measurement using radiated spurious energy. One example embodiment provides a portable communication device. The device includes a transceiver, a digital signal processor coupled to the transceiver, and an electronic processor coupled to the transceiver and the digital signal processor. The electronic processor is configured to tune the transceiver from an operating channel to a self-quieting channel. The electronic processor is configured to receive, from the digital signal processor, a received signal strength indication based a self-quieting signal received via the transceiver. The electronic processor is configured to compare the received signal strength indication for the self-quieting signal to a predetermined reference signal strength indication associated with the self-quieting channel to determine a signal strength difference. The electronic processor is configured to, when the signal strength difference exceeds a threshold, generate a component failure alert based on the signal strength difference.