Directional Coupler Signal Detection for VSWR Measurement
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Solution Overview
Problem
Current antenna circuit signal detection systems in mobile communication terminals face challenges in accurately measuring voltage standing-wave ratio (VSWR) to detect defects, often requiring multiple components and complex setups.
Innovation Solution
A transmission and reception signal detecting apparatus using a directional coupler with a signal detecting part that includes switching components and terminators to selectively detect transmission and reflected signals, allowing for sequential measurement of VSWR to assess antenna performance with reduced parts and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detectors and complex setups are used to accurately measure VSWR, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines transmission signal detection and reception signal detection into a single detector by using a directional coupler to separate the signals. The directional coupler divides the transmission line into forward and reverse signal paths, allowing one detector to measure both VSWR parameters sequentially or simultaneously, thereby reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The directional coupler acts as an intermediary device that separates the transmission and reception signals from a single measurement line. It couples a portion of the forward and reflected signals to the detector through different ports, enabling accurate VSWR measurement without requiring multiple independent detection systems.
2Measurement precision
If multiple components are used for signal detection, then measurement accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The invention merges multiple detection functions into a single detector by using the directional coupler's port characteristics. Instead of requiring separate detectors for transmission and reception signals, the system uses one detector connected to the directional coupler, reducing component count and manufacturing cost while maintaining detection accuracy through proper signal routing.
Solution Approach 2:
The single detector is made universal by configuring it to measure different parameters (transmission signal and reflected signal) through different operational modes or connection configurations of the directional coupler. This multi-functionality eliminates the need for multiple specialized detectors, reducing manufacturing complexity and cost.
3Device complexity
If a single detector is used to detect multiple signals, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The directional coupler serves as an intermediary that prevents signal interference when using a single detector. It separates the forward and reflected signals into different ports, allowing the detector to measure each signal accurately without contamination from the other, thus maintaining measurement precision while simplifying the device.
Solution Approach 2:
The system may use periodic switching or sequential measurement approaches where the single detector alternates between measuring transmission signals and reception signals. This periodic action allows accurate measurement of both parameters over time without requiring simultaneous detection, maintaining precision while using simpler hardware.
Data Source
AI summary
Provided is a transmission and reception signal detecting apparatus, which includes a directional coupler and a signal detecting part. The directional coupler includes a first port and a second port. The signal detecting part is connected to the first and second ports of the directional coupler and detects an output of a first signal transmitted through the first port and an output of a second signal transmitted through the second port. The signal detecting part is connected to the first port under a first operation condition. The signal detecting part is connected to the second port under a second operation condition.