Differentially Segmented Aperture Antenna for Beam Steering Nulls
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Solution Overview
Problem
Existing antenna technologies face challenges in efficiently steering and nulling beams for differentially segmented aperture (DSA) antennas, particularly in accurately determining the azimuth of a signal of interest and suppressing unwanted interfering signals.
Innovation Solution
The implementation of a DSA antenna system with phase conversion circuitry, transmit phase shift circuitry, and receive phase shift circuitry, which manipulates the phase differences between aperture segments to steer signals constructively and steer unwanted signals into nulls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If beam steering is implemented using phase changes on all radiating elements, then the direction of the main lobe can be changed to target a specific receiver, but the complexity of phase control and signal management increases
Solution Approach 1:
The aperture is divided into multiple differentially segmented elements, each capable of independent phase control. This segmentation allows the complex beam steering operation to be decomposed into simpler individual element phase adjustments, making the overall system more manageable while achieving versatile beam direction control
2Adaptability or versatility
If multiple frequency beams are steered in different directions to serve different users, then the system can support multiple users simultaneously, but the phase management complexity and signal processing requirements increase
Solution Approach 1:
The differentially segmented aperture antenna system is designed to perform multiple functions: it can steer single-frequency beams for point-to-point communication and simultaneously steer multiple frequency beams in different directions for multi-user service. The same segmented aperture structure and phase control mechanism serve both single-user and multi-user scenarios, reducing the need for separate dedicated systems
3Measurement precision
If the aperture is differentially segmented to enable precise beam control, then beam steering and nulling precision is improved, but the manufacturing and assembly complexity increases
Solution Approach 1:
The aperture is differentially segmented into multiple independent elements that can be manufactured separately and then assembled into the complete antenna array. This approach allows for precise control of each segment's phase characteristics while simplifying the manufacturing process, as each segment can be produced using standard fabrication techniques and then integrated into the final configuration
Solution Approach 2:
Each segmented element of the aperture is designed with specific local phase characteristics tailored to its position in the array. This local quality differentiation enables precise beam steering and nulling control, as each element contributes its specific phase property to the overall beam pattern, achieving high precision without requiring the entire aperture to be manufactured as a single complex unit
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 solution enables precise beam steering and nulling, maximizing signal strength for desired targets while minimizing interference from unwanted signals, thereby enhancing communication efficiency and effectiveness.
Implementation Method 1
Beam steering is a technique for changing the direction of the main lobe of a radiation pattern. Beam steering changes the phase of the input signal on all radiating elements.
Implementation Method 2
The phase difference steers a signal radiating from each element to the target so that the signal from each element interferes constructively
Implementation Method 3
The phase difference causes the signal received by each element to interfere constructively for a signal of interest, and suppresses an unwanted signal from the element by steering the unwanted signal into a null
Data Source
AI summary
A beam steering system includes a differentially segmented aperture antenna comprising a plurality of pyramid structures arranged in an array, and a plurality of elements formed in an array, each element being defined between two adjacent pyramid structures; phase conversion circuitry to determine a phase conversion for each element, the phase conversion for each element being based on an angle of a target with respect to the element, and an operating frequency of the DSA antenna; transmit phase shift circuitry to apply a phase difference for each element based on the phase conversion, the phase difference steering the signal to the target so that the signal interferes constructively; and receive phase shift circuitry to apply a phase difference for each element based on the phase conversion, causing the signal to interfere constructively for a signal of interest, and suppresses an unwanted signal by steering the signal into a null.