研究目的
Investigating the design and functionality of a circular-waveguide coupled two-layer DRA configuration for linear and circular polarizations without additional coupling or matching elements.
研究成果
The circular waveguide coupled multilayer DRA configuration enhances functionality for dual-band and CP operations without additional matching elements, offering good axial-ratio performance and high isolation between RHCP and LHCP fields. This design represents a novel approach compared to previous rectangular waveguide fed structures.
研究不足
The study focuses on specific configurations and frequencies for military/defense applications, potentially limiting its applicability to other frequency bands or applications without further optimization.
1：Experimental Design and Method Selection:
The study employs a full-wave Green’s function analysis to model the antenna configuration, including the thickness of the ground-plane as an annular cavity.
2：Sample Selection and Data Sources:
The antenna dimensions and permittivity are optimized for broadband, dual-band, and CP operations.
3：List of Experimental Equipment and Materials:
A circular waveguide of radius 13 mm, coupled to the DRA through an annular slot, with specific permittivities for the inner and outer DRA layers.
4：Experimental Procedures and Operational Workflow:
The analysis involves evaluating the reflection coefficient, radiation patterns, and axial-ratio characteristics for both linearly and circularly polarized configurations.
5：Data Analysis Methods:
The computed results are compared with measured data to validate the design.
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