Antenna Feed Line Opening Pattern for Power Distribution
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Solution Overview
Problem
Conventional antenna apparatuses face issues with insufficient power supply to radiating elements, leading to deteriorated antenna characteristics such as side lobe ratio and antenna gain due to inefficient signal propagation from the feed line to the radiating element.
Innovation Solution
The antenna apparatus incorporates a linear feed line with protruding radiating elements and an opening pattern in the feed line, along with impedance matching elements, to enhance power distribution and impedance matching, allowing for a desired amount of electric power to be effectively supplied to the radiating elements, thereby increasing the coupling amount and improving antenna characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional feed line connection is used to connect the line to the radiating element, then the structure is simple, but the signal supply from the line to the radiating element is insufficient, causing deterioration of antenna characteristics
Solution Approach 1:
The feed line structure transitions from a conventional planar connection to a three-dimensional configuration by bending the feed line at a predetermined angle and positioning it above the substrate. This spatial arrangement creates an opening pattern that enhances electromagnetic field distribution and improves signal coupling to the radiating element, thereby improving antenna characteristics without excessive complexity
Solution Approach 2:
The invention optimizes specific parameters including the bending angle of the feed line, the distance from the radiating element, and the dimensions of the opening pattern. By carefully adjusting these parameters, the feed line achieves improved signal supply and impedance matching, resolving the contradiction between reliability and complexity
2Volume of moving object
If the feed line is bent together with impedance matching elements between adjacent radiating elements, then the antenna apparatus can be downsized, but the structure becomes more complex
Solution Approach 1:
The feed line is designed to perform multiple functions simultaneously: it provides signal distribution to radiating elements, creates impedance matching through its bent configuration, and enables compact folding to reduce overall antenna size. By merging these functions into a single integrated structure, the invention achieves downsizing without proportionally increasing complexity
Solution Approach 2:
The bent feed line structure serves as both a signal transmission path and an impedance matching element. The same structural feature that enables compact folding also provides the necessary electrical characteristics for proper impedance matching, eliminating the need for separate matching components and reducing overall complexity
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 ensures a desired amount of electric power is distributed to the radiating elements, enhancing antenna performance by increasing the coupling amount and maintaining optimal antenna characteristics like side lobe ratio and gain.
Implementation Method 1
an opening pattern is located in a portion of the feed line from which the radiating element protrudes. The opening pattern extends into a portion of the radiating element... it is possible to distribute a desired amount of electric power to the radiating element
Implementation Method 2
impedance matching elements that match an impedance of the radiating element... A plurality of the radiating elements is provided to the feed line at predetermined intervals
Data Source
AI summary
An antenna apparatus according to an embodiment includes a linear feed line and a radiating element that protrudes laterally from a first side of the feed line. The radiating element is formed by a conductive pattern, and an opening pattern is located in a portion of the feed line from which the radiating element protrudes. The opening pattern extends into a portion of the radiating element.