Antenna Array Phase Shift Verification via Continuous RF Monitoring
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Solution Overview
Problem
Current testing methods for wireless devices, particularly those using IEEE 802.11ad standards, are time-consuming and costly due to the need to individually test each phase shift of antenna elements for beamforming, which is essential for achieving optimal signal-to-noise ratio, as they require numerous stop and start controls and extensive test times.
Innovation Solution
A method that involves continuously transmitting a radio frequency (RF) signal while selectively switching antenna element phase-shift circuits, detecting phase shifts, and capturing signal samples before and after changes to determine if phase shifts align with expected values, thereby reducing test time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional testing methods are used to individually test each phase shift of antenna elements, then measurement precision of phase shifts is improved, but loss of time increases significantly
Solution Approach 1:
The patent implements continuous signal transmission through the antenna array without stopping between phase shift measurements. The signal continuously passes through all antenna elements while phase shifts are dynamically adjusted and measured in real-time, eliminating the need to stop and start the signal for each individual measurement, thus dramatically reducing test time while maintaining measurement precision
Solution Approach 2:
The patent pre-configures the antenna array with all necessary phase shift settings before beginning the measurement process. The system prepares the complete set of phase shift values and transmission paths in advance, allowing the measurement to proceed continuously through all configurations without interruption or repeated setup, thereby reducing the overall test time
2Measurement precision
If traditional testing methods with numerous stop and start controls are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the signal transmission function with the phase shift measurement function into a single continuous process. Instead of having separate stopping and starting controls for each measurement, the system combines these operations into one continuous measurement sequence, simplifying the control architecture while maintaining the ability to precisely measure each phase shift
Solution Approach 2:
By eliminating the need for repeated stop and start controls, the patent reduces the complexity of the control system. The continuous operation removes numerous control points and state transitions that would otherwise be required, simplifying the overall device complexity while preserving measurement precision through continuous monitoring
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 significantly reduces test time and costs by allowing continuous signal flow and efficient detection of phase shifts, ensuring that the phase-shifted signals remain within specifications, thus improving the efficiency of beamforming in wireless devices.
Implementation Method 1
each antenna element can have its transmitted signal phase shifted in predetermined increments
Implementation Method 2
When antenna elements emit their transmit signals at particular phase shifts, this changes how the signal radiating from that element will interact with signals radiating from other elements. In essence, where these signals meet in space, they will undergo constructive (additive) or destructive (subtractive) interference.
Implementation Method 3
measuring a signal phase difference between each one of the plurality of RF signal samples and one or both of the prior RF signal sample and the subsequent RF signal sample for comparison with one or more expected signal phase differences
Data Source
AI summary
A method for enabling confirmation of expected phase shifts of radio frequency (RF) signals emitted from respective elements of an antenna array, such as a phased array antenna used for providing directional RF signal radiation patterns needed for beamforming. As a RF signal transmitted via an antenna element of the antenna array is shifted, e.g., stepped, in phase, the resulting received RF signal is monitored. Following detection of a phase shift, a sample of the received RF signal is captured and stored, e.g., for subsequent analysis, such as comparison with one or more expected signal phase differences to characterize the directivity of the transmitted signal.