Nested Antenna Structure for High Gain in Compact Footprint
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Solution Overview
Problem
Designing a high-gain antenna that is compact in size poses a challenge for wireless communication devices, as insufficient gain degrades communication quality.
Innovation Solution
The proposed antenna structure includes a main radiation element, additional radiation elements, a dielectric substrate, and a ground plane, where the additional radiation elements generate resonant currents in the same direction as the main element, enhancing radiation gain, and is optimized with specific element sizes and configurations to cover frequency bands like 2.4 GHz for WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to make the device compact, then the device portability is improved, but the radiation gain decreases
Solution Approach 1:
The patent embeds additional radiation elements within the structure of the main radiation element. Specifically, first additional radiation elements are positioned inside the perimeter defined by the main radiation element, and second additional radiation elements are positioned inside the perimeter defined by the first additional radiation elements, creating a nested configuration that maximizes gain within a compact footprint.
Solution Approach 2:
The patent transitions from traditional planar antenna designs to a three-dimensional nested structure. By arranging radiation elements in multiple layers and dimensions (with elements positioned at different heights and orientations), the antenna achieves higher radiation gain without proportionally increasing the planar footprint, thus maintaining compactness while improving performance.
2Power
If additional radiation elements are added to increase radiation gain, then the communication quality is improved, but the device complexity increases
Solution Approach 1:
The patent divides the antenna system into distinct functional segments: a main radiation element for primary operation, first additional radiation elements for enhanced gain, and second additional radiation elements for further performance improvement. Each segment operates at different frequencies or modes, allowing the complex functionality to be modularized and managed through clear segmentation rather than a monolithic design.
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 configuration effectively increases radiation gain by at least 2 dB in the operation frequency band, supporting wideband operations and maintaining a small size, making it suitable for various communication devices with improved communication quality.
Implementation Method 1
the additional radiation elements generate resonant currents in the same direction as the main element, enhancing radiation gain
Data Source
AI summary
An antenna structure includes a main radiation element, a first feeding element, a first additional radiation element, a dielectric substrate, and a ground plane. A first signal source is coupled through the first feeding element to a first side of the main radiation element. The first additional radiation element is coupled to a second side of the main radiation element. A first slot is formed between the first additional radiation element and the main radiation element. The second side is different from the first side. The dielectric substrate has a first surface and a second surface which are opposite to each other. The main radiation element, the first feeding element, and the first additional radiation element are disposed on the first surface of the dielectric substrate. The ground plane is adjacent to the second surface of the dielectric substrate.