Adaptive Antenna Array Switching for Wideband Radio Source Visualization
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Solution Overview
Problem
Existing radio wave emission source visualization apparatuses are limited to a band of one octave, typically covering 700 MHz to 1500 MHz, and struggle to expand to a band of two octaves, from 700 MHz to 2700 MHz, due to strict antenna design conditions that make it difficult to widen the frequency range without degrading visualization accuracy.
Innovation Solution
A radio wave emission source visualization apparatus that integrates multiple antenna arrays, allowing adaptive selection and switching of antenna element groups based on the incoming wave band, optimizing element intervals to cover a broader frequency range from 700 MHz to 2700 MHz, while maintaining accurate visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frequency band coverage is expanded from one octave to two octaves, then the apparatus can cover 700 MHz to 2700 MHz, but the antenna design conditions become strict and it becomes difficult to widen the band
Solution Approach 1:
The patent segments the wide frequency band into multiple sub-bands and assigns different antenna element configurations to each sub-band. The controller selectively activates specific antenna elements or adjusts spacing for different frequency ranges, effectively dividing the complex wideband problem into manageable narrowband segments. This segmentation approach enables coverage of 700 MHz to 2700 MHz while maintaining simple design conditions for each segment.
Solution Approach 2:
The system dynamically reconfigures the antenna array structure by changing element intervals based on the operating frequency band. This dynamic reconfiguration allows a single antenna array to adapt its characteristics to match different frequency bands, eliminating the need for multiple fixed-configuration antenna systems and reducing overall device complexity while achieving wideband coverage.
2Device complexity
If a single antenna configuration is used for wide band coverage, then device complexity is reduced, but visualization accuracy deteriorates across different frequency bands
Solution Approach 1:
The patent implements a dynamically reconfigurable single antenna system where the element intervals are adjusted based on the received signal frequency. This dynamic adaptation allows the single antenna configuration to maintain optimal visualization accuracy across different frequency bands, equivalent to using multiple fixed configurations, while keeping the physical device simple and unified.
Solution Approach 2:
The system changes the physical parameter (element interval) of the antenna array based on the operating frequency. By receiving signals across different bands and adjusting the element spacing accordingly, the single antenna configuration maintains high visualization accuracy for each frequency band, resolving the contradiction between device simplicity and measurement precision.
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 the apparatus to capture and visualize radio waves across a wider band of two octaves by adaptively setting antenna element intervals, enhancing visualization precision and resistance to multipath propagation.
Implementation Method 1
an antenna 1 includes antenna elements of N rows by N columns (N is a natural number of 2 or more) arranged in an array and captures an incoming wave
Data Source
AI summary
An apparatus includes antenna, selector, estimator, imager and creator. The antenna includes antenna elements of N rows by N columns (N is a natural number of 2 or more) arranged in an array and captures an incoming wave. The selector selects an antenna element group including antenna elements of M rows by M columns (M is a natural number less than N) from the antenna elements of N rows by N columns according to a band of the incoming wave. The estimator estimates an incoming direction of the incoming wave from an element signal of each of the antenna elements included in the selected antenna element group. The imager acquires image data by imaging an orientation direction of an aperture of the antenna. The creator creates a visualized image by visually synthesizing the estimated incoming direction with the image data.