Over-the-Air Power Measurement with Coupled Transmit-Receive Paths
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Solution Overview
Problem
Existing systems face challenges in measuring high-frequency signals emitted by devices under test and assessing their reaction to incoming signals without interfering with the measurement process, especially when a large measuring antenna is required.
Innovation Solution
A wireless measuring system with a detector module and a transmitter module, connected via a power splitter or coupler, allows for over-the-air power measurements and signal transmission without interference, using a signal source like a voltage-controlled oscillator and incorporating a mixer for frequency regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large measuring antenna is placed close to the device under test to perform over-the-air power measurements, then measurement capability is improved, but interference with the device under test increases
Solution Approach 1:
The system segments the measurement and transmission functions into separate modules (detector module and transmitter module) that can operate independently or cooperatively. The detector module measures signals from the device under test while the transmitter module provides test signals, allowing both functions without mutual interference through proper signal path separation using switches and power splitters/couplers.
Solution Approach 2:
The patent introduces intermediary components such as power splitters, power couplers, and switches that mediate between the antenna and the detector/transmitter modules. These intermediaries separate incoming and outgoing signal paths, allowing the measuring system to both transmit test signals and receive measurement signals through the same antenna without direct interference between the transmitter and detector.
2Adaptability or versatility
If the detector input and transmitter output are directly connected to the antenna, then both measurement and transmission functions are achieved, but interference between the two units occurs
Solution Approach 1:
Power splitters and power couplers serve as intermediary devices that separate the signal paths between the antenna, detector module, and transmitter module. These components divide incoming signals to the detector while allowing outgoing signals from the transmitter to reach the antenna, preventing direct interference between the detector input and transmitter output while maintaining dual functionality.
Solution Approach 2:
The system employs dynamic switching mechanisms where switches can connect or disconnect the detector input and transmitter output based on operational requirements. This dynamic configuration allows the system to adapt between measurement-only, transmission-only, or combined modes, managing interference by selectively activating appropriate signal paths.
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
Enables accurate measurement of high-frequency signals emitted by devices under test and their reaction to incoming signals, minimizing interference and allowing for precise power measurement and signal processing without the need for additional hardware.
Implementation Method 1
The detector input and the transmitter output are connected by a power coupler. The power coupler is adapted to couple out a first signal, proportional to a signal received by the antenna, and/or a second signal, proportional to a signal transmitted by the transmitter module.
Implementation Method 2
a measuring system for wirelessly measuring high frequency signals, especially the power of high frequency signals
Data Source
AI summary
A measuring system for performing over the air power measurements is provided. The measuring system comprises, within a single housing, a detector module, comprising a detector input, a transmitter module, comprising a transmitter output, and an antenna. The detector input and the transmitter output are at least temporarily connected. At least the transmitter output or the detector input are at least temporarily connected to the antenna.