Display Antenna Patch Layout for Right-Hand Circular Polarization
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Solution Overview
Problem
Existing antennas face challenges in achieving efficient right-handed circular polarization due to limitations in design geometry and component ratios, which affect bidirectional radiation patterns.
Innovation Solution
The antenna design incorporates a radiating patch with a parallelogram shape and notches, along with branch structures and ring-shaped grooves, coupled with a microstrip feed line and impedance transformation structure, to optimize the radiation pattern and achieve right-handed circular polarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna geometry is used, then manufacturing is simple, but right-handed circular polarization efficiency is poor
Solution Approach 1:
The radiating element employs an asymmetric L-shaped geometry with unequal arm lengths and specific dimensional ratios (Length1/Length2 between 0.5-2.0, Width1/Width2 between 0.5-2.0). This asymmetry creates the necessary phase quadrature between orthogonal components to achieve right-handed circular polarization, resolving the contradiction by sacrificing geometric simplicity for polarization efficiency.
Solution Approach 2:
The patent optimizes specific geometric parameters including arm lengths (Length1, Length2), widths (Width1, Width2), and spacing (S1, S2) to achieve optimal circular polarization performance. By carefully controlling parameter ratios within specific ranges, the antenna achieves high polarization efficiency without requiring overly complex structures.
2Stability of the object's composition
If conventional radiating element shape is used, then design is simple, but bidirectional radiation pattern is not achieved
Solution Approach 1:
The L-shaped radiating element with asymmetric arm configurations (different lengths and widths) creates balanced bidirectional radiation patterns. The specific dimensional relationships ensure that radiation intensity is consistent in opposite directions, achieving stable bidirectional composition without requiring multiple separate radiating elements.
Solution Approach 2:
The radiating element is divided into two perpendicular arms (first and second arms) with distinct dimensional characteristics. This segmentation allows each arm to contribute to different aspects of the bidirectional radiation pattern, achieving consistent omnidirectional performance through coordinated operation of segmented components.
3Productivity
If standard feed line configuration is used, then manufacturing is easy, but impedance bandwidth is limited
Solution Approach 1:
The feed line dimensions (width, length, spacing to ground plane) are optimized within specific parameter ranges to achieve broad impedance bandwidth. By adjusting these parameters, the antenna maintains good impedance matching across a wide frequency range, resolving the contradiction between bandwidth and structural simplicity.
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 design achieves a complete right circular polarization across the n78 band with improved impedance bandwidth and polarization gain, addressing the limitations of existing antennas.
Implementation Method 1
a radiating patch coupled to the microstrip feed line and configured to receive a signal from the microstrip feed line
Data Source
AI summary
An antenna is provided. The antenna includes a ground plate; a dielectric layer on the ground plate; and a microstrip feed line and a radiating patch on a side of the dielectric layer away from the ground plate, the radiating patch being coupled to the microstrip feed line and configured to receive a signal from the microstrip feed line. The radiating patch includes a main body having a parallelogram shape with a first notch truncating a corner of the parallelogram shape, at least a portion of the main body truncated by the first notch having an arc-shaped contour line. The radiating patch further includes a first branch structure.