Beam Pattern Adjusting Apparatus for BDMA Systems
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Solution Overview
Problem
In communication systems supporting the Beam Division Multiple Access (BDMA) scheme, especially at high frequency bands above 10 GHz, the human body's electromagnetic characteristics cause impedance mismatch issues, leading to degraded antenna performance and beam distortion due to the automatic impedance matching scheme's limitations in handling arrays of antennas.
Innovation Solution
A method and apparatus that adjust the beam pattern by determining the Voltage Standing Wave Ratio (VSWR) for each antenna in an array, identifying inoperable antennas, and adjusting the beam pattern using operable antennas to maintain optimal impedance matching and reduce external interference, thereby enhancing communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic impedance matching scheme is used with variable capacitor, then impedance of antenna frequency is optimized, but beam pattern distortion occurs in array antennas and performance degradation occurs at high frequency bands (≥10 GHz)
Solution Approach 1:
The patent divides the impedance matching process into separate operations for each antenna element in the array. Instead of treating the array as a single unit, the system performs individual VSWR measurements and impedance matching adjustments for each antenna element, preventing beam pattern distortion caused by collective matching attempts.
Solution Approach 2:
The patent applies local quality by performing impedance matching operations independently at each antenna element location. Each antenna element receives tailored impedance matching adjustments based on its specific VSWR characteristics, rather than applying a uniform matching approach across the entire array, thereby maintaining optimal performance for each element while preserving overall beam pattern integrity.
2Productivity
If array of antennas is used to increase communication throughput, then directivity is improved, but impedance mismatch issues occur due to human body electromagnetic characteristics at high frequency bands
Solution Approach 1:
The patent implements preliminary action by performing VSWR measurements and impedance matching adjustments for each antenna element before the array begins communication operations. This pre-calibration ensures that each antenna element is properly matched to the system impedance, preventing performance degradation when the array is activated, especially in high frequency bands where human body effects are significant.
Solution Approach 2:
The patent employs feedback mechanisms by continuously monitoring VSWR values for each antenna element and using this information to adjust impedance matching components. The system measures the actual performance of each antenna element and makes real-time adjustments to maintain optimal impedance matching, thereby compensating for human body electromagnetic effects and maintaining reliable communication performance.
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 effectively reduces beam pattern degradation, increases channel capacity, and improves communication system performance by adapting to the human body's electromagnetic effects and array antenna configurations.
Implementation Method 1
a typical scheme is an automatic impedance matching scheme. The automatic impedance matching scheme is a scheme of detecting a Voltage Standing Wave Ratio (VSWR) value which includes a magnitude of a signal and a phase of a signal
Data Source
AI summary
A method for adjusting a beam pattern in a beam pattern adjusting apparatus in a communication system supporting a Beam Division Multiple Access (BDMA) scheme is provided. The method includes determining whether a Voltage Standing Wave Ratio (VSWR) value for each antenna included in an antenna array included in the beam pattern adjusting apparatus is greater than or equal to a threshold VSWR value, if it is determined that an antenna of the antenna array has a VSWR value that is greater than or equal to the threshold VSWR, detecting whether each of the antenna elements is operable, and if it is determined that at least one of the antennas is inoperable, adjusting a beam pattern of at least one of the antennas that is operable.