Antenna Coupler for Wireless Signal Tapping and Calibration
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Solution Overview
Problem
Assembling and operating wireless electronic devices can be challenging due to difficulties in ensuring correct assembly of antennas and requiring extensive calibration with test equipment, which affects wireless performance and is influenced by environmental changes.
Innovation Solution
Incorporating a coupler between the antenna and wireless transceiver circuitry to sample signals, allowing a processor to gather S-parameter phase and magnitude information for real-time control and calibration, adjusting transmit power and antenna settings based on external object presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a coupler is added to tap antenna signals for real-time monitoring and calibration, then measurement precision and adaptability improve, but device complexity increases
Solution Approach 1:
A coupler is introduced as an intermediary component between the antenna and transceiver circuitry. This coupler taps a portion of the antenna signal to provide real-time measurement information about transmitted and reflected signals, enabling precise characterization of antenna performance and environmental effects without requiring external test equipment.
Solution Approach 2:
The wireless device performs self-calibration and self-diagnosis by using the coupler-tapped signals to monitor its own antenna performance. The device can detect assembly errors, track environmental changes, and adjust its operation autonomously without needing external calibration equipment, thereby improving measurement precision while managing complexity through self-sufficiency.
2Manufacturing precision
If extensive calibration with test equipment is performed, then manufacturing precision improves, but productivity decreases
Solution Approach 1:
The coupler is installed during assembly to enable immediate signal tapping and characterization. This allows verification of antenna connections and wireless circuitry functionality to be performed rapidly using the device's own resources rather than requiring time-consuming external test equipment calibration procedures.
Solution Approach 2:
The device performs its own calibration and verification using the coupler-tapped signals, eliminating the need for external test equipment. This self-characterization capability enables rapid assembly line verification of wireless components while maintaining high manufacturing precision through automated measurement and detection of assembly errors.
3Reliability
If the device adapts to environmental changes during operation, then reliability improves, but device complexity increases
Solution Approach 1:
The coupler provides continuous feedback about the antenna's transmitted and reflected signals during operation. By monitoring these tapped signals, the device can detect environmental changes such as the presence of external objects or body proximity that affect antenna performance, and adjust its transmission parameters accordingly to maintain reliable wireless communication.
Data Source
AI summary
An electronic device may be provided with wireless circuitry. Control circuitry may be used to adjust transmit power levels for wireless signals, may be used to tune antennas, and may be used to adjust other settings for the wireless circuitry. The electronic device may have a coupler interposed between an antenna and wireless transceiver circuitry. The coupler and a receiver within the transceiver circuitry may be used to make measurements on tapped antenna signals such as transmitted signals and signals reflected from the antenna. By analyzing the tapped antenna signals, S-parameter phase and magnitude information may be gathered that provides insight into whether the electronic device is operating properly and whether an external object is adjacent to the antenna. If an external object is present, the electronic device may limit wireless transmit power and may adjust tunable components in the antenna to compensate for detuning from the external object.