Dual-Band Patch Antenna Layout for Compact AoA Accuracy
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Solution Overview
Problem
Conventional AoA antenna arrays face challenges due to asymmetry and large dimensions, making them impractical for integration in compact electronic devices, which affects the accuracy of angle-of-arrival calculations in wireless systems.
Innovation Solution
A dual-mode antenna array with symmetric radiating elements and feed structures, featuring modified rectangular shapes with slots, allows for compact implementation and accurate AoA analysis by maintaining linear phase differences and efficient operation across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional rectangular patch antennas are used in AoA antenna arrays, then the antennas can provide uniform amplitude and phase patterns, but the antenna arrays become large in dimension and asymmetric due to feed structure mismatches
Solution Approach 1:
The conventional rectangular patch antenna is segmented by introducing slots (first slot and second slot) that divide the continuous patch structure into separated conductive regions. This segmentation allows the antenna to maintain resonance at multiple frequency bands while reducing the overall physical dimensions of the antenna array, resolving the contradiction between measurement precision and antenna size.
Solution Approach 2:
The feed structure is designed with local quality modifications by introducing feed points at specific locations on the patch antenna rather than using conventional centralized feeding. This localized feeding approach ensures symmetric feed structures in the antenna array, eliminating asymmetry-induced phase pattern differences while maintaining the compact segmented design, thus preserving AoA calculation accuracy without requiring large dimensions.
2Measurement precision
If conventional AoA antenna arrays are designed with large dimensions, then accurate AoA measurements can be achieved, but the arrays cannot be integrated in compact electronic devices
Solution Approach 1:
The patch antenna is divided into multiple conductive patches separated by slots, allowing the antenna to achieve multiple resonant frequencies and maintain accurate AoA measurement capabilities within a reduced physical footprint. The segmented structure enables compact integration while preserving the uniform phase pattern required for precise AoA measurements.
Solution Approach 2:
The antenna design changes key geometric parameters by introducing slots of specific dimensions and positions, which modifies the resonance characteristics and current distribution. This parameter modification enables the antenna to maintain measurement precision while reducing the overall area occupied by the antenna array, making it suitable for compact electronic devices.
3Area of stationary object
If miniaturized antenna structures are used, then compact device integration is enabled, but the phase pattern symmetry and AoA accuracy deteriorate
Solution Approach 1:
The feed structure employs local quality optimization by positioning feed points at specific locations on the segmented patch antenna. This localized feeding approach ensures symmetric current excitation and maintains uniform phase patterns across the compact antenna array, preventing phase asymmetry even though the overall antenna size is reduced for compact integration.
Solution Approach 2:
The design intentionally introduces asymmetric slot configurations (first slot and second slot with different orientations) within the patch structure. This controlled asymmetry in the segmented patches creates balanced current distributions that maintain phase pattern symmetry, enabling accurate AoA measurements in the miniaturized antenna array.
4Ease of manufacture
If conventional feed structures are used in patch antennas, then simple manufacturing is achieved, but asymmetry between antennas occurs due to feed structure mismatches
Solution Approach 1:
The feed structure uses local quality modification by implementing feed points at specific locations on the segmented patch rather than conventional centralized feeding. This localized approach ensures symmetric feed configurations across the antenna array elements, maintaining consistent phase patterns while remaining compatible with standard PCB fabrication processes, thus achieving both ease of manufacture and phase stability.
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
The dual-mode antenna array enables precise AoA calculations in compact devices, maintaining high efficiency and reducing phase pattern differences, thus enhancing the accuracy of angle-of-arrival determinations.
Implementation Method 1
a first radiating element receives a first signal of the RF signaling and generates a first electrical signal; and a second radiating element receives a second signal of the RF signaling and generates a second electrical signal
Data Source
AI summary
A dual-mode antenna array receives RF signaling for AoA analysis, and includes a substrate, a ground plane disposed at a first side and a pair of radiating elements disposed at a second side. Each radiating element of the pair includes conductive material arranged in a modified rectangular shape having a first slot at a first side, a second slot at a second side, a third slot at a third side, and a fourth slot at a fourth side. The antenna array further includes a feed probe disposed adjacent to the pair of radiating elements and a pair of feedlines, each feedline conductively connected, at a first end, to the feed probe and connected, at a second end, to each of a first feed point and a second feed point of a corresponding radiating element.