Planar Conducting Antenna Shape for Stable Impedance
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Solution Overview
Problem
Existing antennas for receiving digital terrestrial television broadcasts are often aesthetically unpleasing, flimsy, expensive, and difficult to use, with limited performance across the entire Advanced Television Standard Committee (ATSC) spectrum, particularly in outdoor environments, and lack efficient, simple, and cost-effective designs with stable impedance and gain across a wide bandwidth.
Innovation Solution
A compact, planar antenna designed with unique electrically conductive elements, such as metallic plates or metal foil, providing a 4:1 bandwidth range with moderate gain and omni-directional performance, featuring a shape that enhances reception and is aesthetically pleasing, rugged, and weatherproof, with adjustable impedance for compatibility with coaxial cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sophisticated feed networks are utilized to improve VSWR bandwidth, then impedance performance is improved, but radiation efficiency and device complexity deteriorate
Solution Approach 1:
The patent extracts and eliminates the sophisticated feed network from the antenna system, achieving broadband impedance performance through the planar conducting element shape alone. The feed is simplified to a basic coaxial connection without complex matching networks, thereby reducing device complexity while maintaining good VSWR characteristics across the operating bandwidth.
Solution Approach 2:
The patent changes the geometric parameters of the planar conducting element (shape, size, configuration) to achieve broadband impedance matching without feed networks. By optimizing the physical dimensions and shape of the conducting element, the antenna achieves good impedance performance across a wide frequency range through inherent broadband characteristics rather than complex feeding structures.
2Adaptability or versatility
If the antenna is designed for wide bandwidth operation, then frequency range is improved, but radiation pattern stability and gain consistency deteriorate
Solution Approach 1:
The patent employs curved configurations in the planar conducting element rather than straight linear shapes. The curved geometry helps maintain more stable radiation patterns across the broadband range by creating more uniform current distribution and reducing edge effects that vary significantly with frequency. The curvature provides inherent broadband characteristics while maintaining pattern consistency.
Solution Approach 2:
The patent transitions from traditional linear or planar dipole shapes to a two-dimensional planar conducting element with specific geometric configuration. This dimensional change allows the antenna to achieve broadband operation with more stable radiation patterns by utilizing the entire planar surface for current distribution, creating inherent broadband characteristics without sacrificing pattern consistency.
3Ease of manufacture
If traditional antenna designs are used for ATSC reception, then manufacturing cost is reduced, but aesthetic appearance and durability deteriorate
Solution Approach 1:
The patent uses a thin planar conducting element that can be manufactured as a sleek, modern panel suitable for aesthetic applications. This thin-film approach allows the antenna to have a clean, contemporary appearance while remaining simple to manufacture through standard fabrication techniques for planar conducting structures, thus improving both aesthetics and ease of manufacture compared to traditional bulky antenna designs.
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 antenna achieves superior performance with stable impedance and gain across a wide frequency range, making it suitable for both indoor and outdoor use, offering improved aesthetics, durability, and ease of installation while maintaining high reception quality.
Implementation Method 1
An antenna employing the antenna element of the present invention may further comprise packaging that is constructed from electrically non-conductive material such as polycarbonate or other suitable materials. The antenna pattern in azimuth is comparable to that of a dipole antenna, but with higher gain.
Data Source
AI summary
Typical consumer-grade terrestrial television antennas use simple flat plates in a dipole configuration. Reception is enhanced by elevating the antenna for better line of sight to the broadcast antenna, which often necessitates locating the antenna in the attic of a building or on the roof in the where it is exposed to the weather. The antenna disclosed is uses antenna elements that are substantially planar, have a unique shape that improves reception, and allows for compact packaging in a weatherproof case.