Array-Fed Reflector Antenna Element Selection for DBF Beam Accuracy
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Solution Overview
Problem
Existing array-fed reflector antennas do not effectively reduce the number of connection elements, which can lead to inefficiencies and potential failures in communication systems.
Innovation Solution
A signal processing device for array-fed reflector antennas employs an excitation coefficient calculator that uses a DBF algorithm to select element antennas with significant excitation coefficients, reducing the number of connection elements by comparing neighboring coefficients to a threshold, thereby optimizing the connection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all element antennas are connected to the transceiver, then the beam forming accuracy is improved, but the device complexity and number of connection elements increases
Solution Approach 1:
The patent extracts and removes element antennas with small excitation coefficients from the active set. By calculating excitation coefficients for all element antennas and comparing them against a threshold, the system identifies and excludes those that contribute negligibly to the beam, thereby reducing the number of connections to the transceiver while maintaining beam forming accuracy.
Solution Approach 2:
The patent changes the parameter of connection status for each element antenna based on the excitation coefficient threshold. Element antennas are dynamically classified as either connected or excluded based on whether their excitation coefficient exceeds the threshold, allowing the system to adapt the number of connections according to actual beam forming requirements.
2Device complexity
If element antennas with small excitation coefficients are excluded, then the number of connection elements is reduced, but the beam forming precision may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where excitation coefficients are calculated for all element antennas, and those exceeding a threshold are selected for connection. This feedback loop ensures that only element antennas making significant contributions to the beam are connected, preventing degradation of beam forming precision while reducing unnecessary connections.
Solution Approach 2:
The system dynamically adjusts the connection status parameter of each element antenna based on the excitation coefficient threshold comparison. By changing the connection parameter from a fixed state to a conditional state based on excitation coefficient magnitude, the system maintains precision while reducing complexity.
Data Source
AI summary
A signal processing device for an array-fed reflector antenna according to the technology of the present disclosure is a signal processing device for an array-fed reflector antenna of a DBF system, and includes an excitation coefficient computation unit, the excitation coefficient computation unit executes a DBF algorithm on an assumption that all element antennas connected to an array-fed unit are used, and calculates an excitation coefficient for each of the element antennas, and the excitation coefficient computation unit selects an element antenna that greatly contributes to a beam among the element antennas on the basis of a numerical value of the excitation coefficient.