Array Antenna Phase Control Using Fisheye Marker Interpolation
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Solution Overview
Problem
Conventional power feeding apparatuses require extensive computational efforts to adjust phases of power transmission signals in array antennas, making it difficult to optimize received power at the power receiving antenna.
Innovation Solution
An antenna device with a two-dimensional array antenna, phase adjustment units, and image acquisition using a fisheye lens to calculate phase adjustments based on marker positions, employing parabolic interpolation of quadratic functions to simplify the phase setting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase adjustment amounts are calculated for all antenna elements to optimize received power, then received power increases, but calculation complexity and time increase enormously
Solution Approach 1:
The patent divides the array antenna into multiple sub-arrays along the first axis and second axis. Phase adjustment amounts are calculated for endpoint antenna elements of each sub-array, and then interpolated to determine phase adjustment amounts for all antenna elements. This segmentation reduces the computational burden while maintaining effective beamforming capability.
Solution Approach 2:
The patent calculates phase adjustment amounts for only the endpoint antenna elements of sub-arrays in advance, then uses interpolation (such as parabolic interpolation) to determine phase adjustment amounts for intermediate antenna elements. This preliminary calculation approach significantly reduces computation time while achieving satisfactory power reception optimization.
2Productivity
If phase adjustment amounts are precisely calculated for all antenna elements, then power transmission efficiency improves, but processing time increases
Solution Approach 1:
The patent applies partial action by calculating phase adjustment amounts for only the endpoint antenna elements of sub-arrays rather than all antenna elements. The intermediate values are obtained through interpolation, which provides sufficiently accurate results for power transmission while dramatically reducing processing time.
Solution Approach 2:
Phase adjustment amounts for endpoint elements are calculated in advance using closed-form expressions based on geometric relationships, and then interpolated to obtain phase adjustment amounts for all elements. This preliminary calculation approach maintains power transmission efficiency while reducing real-time processing requirements.
3Reliability
If conventional phase calculation methods are used, then received power can be optimized, but the system becomes difficult to operate
Solution Approach 1:
The patent replaces complex iterative numerical optimization methods with closed-form geometric calculations based on the positions of antenna elements and the power receiving antenna. By using geometric relationships and interpolation formulas, the system achieves received power optimization through simple algebraic operations rather than complex mechanical or iterative computational processes.
Solution Approach 2:
The patent pre-establishes geometric relationships and interpolation formulas (such as parabolic interpolation) that can be directly applied once antenna positions are known. This eliminates the need for complex real-time optimization algorithms, making the system easy to operate while maintaining effective received power optimization.
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
Facilitates easy calculation of phase adjustment amounts for multiple antenna elements, enhancing power reception efficiency regardless of the power receiving antenna's position, even during movement or positional deviations.
Implementation Method 1
an array antenna configured to transmit a power transmission signal to a power receiving antenna
Implementation Method 2
phase adjustment units configured to adjust phases of power transmission signals that are supplied to the plurality of antenna elements
Data Source
AI summary
An antenna device includes circuitry configured to determine a first distance between a marker center and a fisheye lens, based on a first elevation angle and a coordinate of a marker along a third axis, determine second distances between the fisheye lens, and first endpoints and second endpoints, and control phase adjustment amounts by which phase shifters adjust phases of power transmission signals in a first axis direction and a second axis direction. The circuitry is configured to set phase adjustment amounts for three antenna elements including antenna elements at both ends in the first axis direction and for three antenna elements including antenna elements at both ends in the second axis direction, based on path differences between the first distance and the second distances, and set phase adjustment amounts for a plurality of antenna elements arranged two-dimensionally by parabolic interpolation of a quadratic function.