Antenna Device Parasitic Element Interval Control
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Solution Overview
Problem
In millimeter wave communication systems, antenna arrays face challenges with radiation pattern distortion and size enlargement due to the need for large ground areas to maintain symmetry, which hinders miniaturization.
Innovation Solution
The proposed antenna device includes a substrate with multiple antenna elements and a parasitic element without a feeding point, where the parasitic element is strategically positioned to minimize distortion and reduce the device's size by controlling the element intervals and parasitic element placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a sufficiently large ground area is provided to inhibit radiation pattern distortion, then radiation pattern symmetry is improved, but the antenna device size becomes larger
Solution Approach 1:
A parasitic element is introduced as an intermediary component between the antenna elements and the ground. This parasitic element has no feeding point and is positioned at a specific interval from the antenna elements. It mediates the electromagnetic field distribution to suppress radiation pattern distortion without requiring a large ground area, thus resolving the contradiction between radiation pattern symmetry and device size.
Solution Approach 2:
The invention changes the key parameter of element spacing by setting the interval between the parasitic element and the antenna elements to be equal to or less than twice the interval between adjacent antenna elements. This specific parameter relationship optimizes the coupling effect and enables effective radiation pattern control in a compact configuration.
2Power
If multiple antenna elements are arrayed to achieve beam forming and high gain, then antenna gain is improved, but radiation pattern distortion occurs
Solution Approach 1:
The parasitic element serves as a mediator that corrects the radiation pattern distortion caused by the arrayed antenna elements. By positioning the parasitic element at a controlled interval from the antenna elements, it modifies the electromagnetic field distribution and suppresses distortion while maintaining the high gain characteristics achieved through beam forming.
Solution Approach 2:
The parasitic element provides a feedback mechanism to the antenna system. Through electromagnetic coupling, it senses the radiation pattern distortion and automatically adjusts the field distribution to suppress distortion, enabling the system to maintain both high gain and pattern stability.
3Power
If millimeter wave communication is implemented requiring high gain antenna, then communication performance is improved, but spatial attenuation increases
Solution Approach 1:
The invention implements dynamic beam forming capability through the arrayed antenna elements combined with the parasitic element. This allows the antenna system to dynamically adjust beam direction and width to track the communication target, concentrating energy in the desired direction and minimizing spatial attenuation, thereby improving millimeter wave communication performance.
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 maintains radiation pattern symmetry while miniaturizing the antenna device, allowing for more compact designs without compromising performance.
Implementation Method 1
a parasitic element supported by the substrate and having no feeding point, in which the plurality of antenna elements is disposed to be spaced apart from each other along a predetermined direction, the parasitic element is mutually spaced apart in the direction from a first antenna element located on an end side in the direction among the plurality of antenna elements
Data Source
AI summary
An antenna device including: a substrate; a plurality of antenna elements supported by the substrate, each of the antenna elements having a feeding point; and a parasitic element supported by the substrate and having no feeding point, in which the plurality of antenna elements is disposed to be spaced apart from each other along a predetermined direction, the parasitic element is mutually spaced apart in the direction from a first antenna element located on an end side in the direction among the plurality of antenna elements, and a first element interval between the parasitic element and the first antenna element is equal to or less than twice a second element interval between the first antenna element and a second antenna element located on an opposite side of the parasitic element with respect to the first antenna element.