Dipole Antenna Assembly with Segmented Tubular Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dipole antennas have limited bandwidth and VSWR response, making them less efficient for frequency communication, and are difficult to assemble.
Innovation Solution
A dipole antenna assembly with a coaxial feed extending through a first tubular dipole element and a second tubular dipole element with spaced segments, providing dual band operation and increased ease of assembly by adjusting the spacing between elements for improved frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional dipole antenna structure is used, then manufacturing is simpler, but bandwidth is limited and assembly is difficult
Solution Approach 1:
The dipole antenna is divided into multiple discrete tubular segments that can be independently manufactured and then assembled together. Each segment has specific electrical lengths (e.g., 5/8 wavelength) and can be connected via coupling mechanisms, allowing for modular assembly while achieving the desired bandwidth characteristics through the segmented structure.
Solution Approach 2:
The patent employs nested tubular segments where inner conductors are positioned within outer conductors, and multiple dipole elements are arranged concentrically. This nesting arrangement allows compact assembly while maintaining the electrical performance needed for extended bandwidth operation.
2Reliability
If antenna size and shape are adjusted to achieve desired characteristics, then frequency performance improves, but manufacturing complexity increases
Solution Approach 1:
Instead of manufacturing a single complex antenna element with precise dimensional requirements, the antenna is segmented into multiple standardized tubular sections. Each segment can be manufactured using consistent processes, and the overall frequency response is achieved through the arrangement and electrical connection of these segments rather than through complex shaping of individual pieces.
Solution Approach 2:
The patent achieves desired frequency characteristics by adjusting parameters such as the length of each tubular segment (e.g., 5/8 wavelength portions), the spacing between segments, and the dimensions of coupling elements. These parameter adjustments allow optimization of frequency response while maintaining relatively simple manufacturing processes for each individual component.
3Reliability
If tubular segments are spaced apart, then bandwidth increases four times, but structural complexity increases
Solution Approach 1:
The antenna structure is divided into multiple tubular segments with controlled spacing between them. This segmentation creates multiple resonant frequencies and impedance transformations that collectively extend the bandwidth. The spacing between segments is a key design parameter that enables the four-fold bandwidth increase while the modular nature of the segments keeps the structural complexity manageable through standardized connection interfaces.
Data Source
AI summary
A dipole antenna assembly may include a first tubular dipole element and a coaxial antenna feed extending through a proximal end of the first tubular dipole element. The coaxial antenna feed may have an inner conductor, an outer conductor, and a dielectric therebetween. The inner conductor may extend outwardly beyond a distal end of the first tubular dipole element. The outer conductor may be coupled to the distal end of the first tubular dipole element. The dipole antenna assembly may further include a second tubular dipole element with a proximal end being adjacent the distal end of the first tubular dipole element, and being coupled to the inner conductor. The second tubular dipole element may include first and second tubular segments and an electrical conductor extending through the first and second tubular sections and being coupled thereto at both the proximal and distal ends.