Monopole Balun Shell Layout to Suppress EM Radiation
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Solution Overview
Problem
Existing antenna systems struggle to efficiently generate and transmit scalar longitudinal waves due to electromagnetic wave radiation from the balun portion, which interferes with the desired wave transmission.
Innovation Solution
Attaching the balun to the distal end of the monopole antenna shield, forming a cylindrical shell shape, reduces electromagnetic wave radiation and enhances the generation and transmission of scalar longitudinal waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a traditional balun is attached to a monopole antenna, then electromagnetic wave radiation is generated, but scalar longitudinal wave transmission is interfered with
Solution Approach 1:
The balun is extracted from its traditional position at the base of the monopole antenna and relocated to the distal end (tip). This extraction from the traditional configuration eliminates the harmful electromagnetic wave radiation that occurs when the balun is attached at the base, while preserving the desired scalar longitudinal wave transmission capability.
Solution Approach 2:
Instead of attaching the balun at the base end of the monopole antenna (traditional approach), the invention inverts this arrangement by attaching it at the distal end. This inversion of the attachment position fundamentally changes the radiation characteristics, eliminating electromagnetic wave interference while maintaining scalar wave transmission.
2Device complexity
If the balun is attached at the base of the monopole antenna, then the antenna structure is simple, but electromagnetic wave radiation interferes with wave transmission
Solution Approach 1:
The invention inverts the traditional balun attachment position from the base to the distal end of the monopole antenna. This simple positional inversion maintains structural simplicity while fundamentally eliminating the electromagnetic wave radiation problem associated with base-mounted baluns.
3Shape
If the balun length and shield length are made equal, then the cylindrical shell configuration is achieved, but the aperture positioning becomes critical
Solution Approach 1:
The invention specifies precise parameter relationships: the balun length is made equal to the shield length, and the cylindrical shell diameter is set to half a wavelength. These parameter changes create a specific resonant configuration that positions the aperture at a null point for electromagnetic radiation, thereby reducing the impact of positioning tolerances.
Solution Approach 2:
The cylindrical shell configuration with diameter equal to half a wavelength creates a periodic resonant structure. This periodic geometry establishes specific radiation null positions at the aperture, leveraging wave interference patterns to minimize electromagnetic wave emission regardless of minor positioning variations.
Data Source
AI summary
Devices, systems and methods are provided for the transmission of scalar longitudinal waves via a monopole antenna. A balun may attach to a shield at a base end of a monopole antenna to form a cylindrical shell shape with a closed end at the contact location and an open end facing the tip end of the monopole antenna. The open end may form an aperture between a distal shield end and a distal balun end, and the lengths of the shield and balun may be equal. A shielded portion and an antenna portion of the center conductor may be encased by a spherical transmitter. The center conductor may extend through the aperture, toward the tip end, and through a gap formed between the terminating end of the shield at the distal end of the shielded portion and the first end of the antenna portion encased by an antenna tube.