Ground Radiation Antenna Using Capacitive Element
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Solution Overview
Problem
Existing ground radiation antennas have complex structures and large sizes due to the need for separate radiating elements, which complicates the fabrication process and increases size, despite using the ground as a radiator.
Innovation Solution
A radiator-forming circuit using a capacitive element that replaces the complex radiating element, combined with a simplified feeding scheme to maximize radiating performance, allowing the ground to function as a radiator without a separate inductive element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate radiating element is added to the ground radiation antenna, then the radiating performance is improved, but the device complexity and size increase
Solution Approach 1:
The patent extracts the inductive element function from the separate radiating element and transfers it to the ground plane. The ground plane is designed with specific geometric patterns (such as inverted F-shaped or meander line patterns) that provide the necessary inductance, allowing the capacitive element alone to form the radiating structure without requiring additional inductive components.
Solution Approach 2:
The ground plane serves multiple functions simultaneously: it acts as the reference ground for the capacitive element, provides the inductive component of the resonant circuit through its geometric pattern, and functions as the radiating structure itself. This multi-functionality eliminates the need for separate radiating elements while maintaining radiating performance.
2Reliability
If a separate radiating element is added to the ground radiation antenna, then the radiating performance is improved, but the volume increases
Solution Approach 1:
The patent merges the ground plane with the radiating function by designing specific geometric patterns in the ground plane that provide both the reference ground and the inductive component. The capacitive element is positioned on this patterned ground plane, and together they form the complete radiating structure, eliminating the need for separate radiating elements and reducing overall antenna volume.
3Reliability
If a separate radiating element is added to the ground radiation antenna, then the radiating performance is improved, but the fabrication process becomes more complex
Solution Approach 1:
The patent segments the antenna into two distinct functional components: a capacitive element and a patterned ground plane. The capacitive element can be implemented using standard SMD capacitors or printed capacitor structures, while the ground plane is fabricated using standard PCB trace patterns. This segmentation allows each component to be manufactured using well-established, simple processes without requiring complex assembly of multiple radiating elements.
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 solution results in a smaller, simpler antenna structure with reduced fabrication costs and excellent radiating performance, capable of broad-band and multi-band operation.
Implementation Method 1
a radiator-forming circuit using a capacitive element that can replace the radiating element having a complex structure
Data Source
AI summary
A ground radiation antenna is disclosed. Herein, the ground radiation antenna provides a radiator-forming circuit, which is formed to have a simple structure using a capacitive element, as well as a feeding circuit suitable for the provided radiator-forming circuit. Thus, the structure of the antenna becomes simpler and the size of the antenna becomes smaller. Accordingly, the fabrication process of the antenna is simplified, thereby largely reducing the fabrication cost.