Logarithmic Bicone Antenna Wideband Design
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Solution Overview
Problem
Standard bicone antennas have insufficiently narrow operating frequency ranges and suffer from low gain due to the use of antenna arrays and positioning/rotary joints, which increase power requirements and induce noise, resulting in high return loss.
Innovation Solution
A bicone antenna design featuring a feed portion with top and bottom sections having conical surfaces that extend radially outward at a constant angle, merging into logarithmically curved surfaces, allowing the antenna to act as a traveling wave antenna for multi-directional operation over a wide frequency range with minimal moving parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antenna arrays with multiple antennas are used to extend frequency range, then frequency bandwidth is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the bicone antenna - specifically using logarithmically extending conical surfaces with specific angle ranges (15-45 degrees from vertical) and aspect ratios (0.5-2.0) to achieve wideband operation (2:1 frequency ratio) without requiring multiple antenna elements or complex arrays
2Adaptability or versatility
If positioning or rotary joints are used to enable multi-directional operation, then operational versatility is improved, but noise increases and gain decreases
Solution Approach 1:
The patent applies universality by designing a stationary bicone antenna structure that inherently provides multi-directional reception capability without requiring mechanical positioning or rotary joints. The logarithmically extending conical surfaces create omnidirectional radiation patterns in both azimuth and elevation, eliminating the need for moving parts while maintaining operational versatility
3Adaptability or versatility
If antenna arrays are used to extend frequency range, then frequency bandwidth is improved, but return loss increases due to high power requirements
Solution Approach 1:
The patent applies parameter changes by optimizing the geometric parameters of the bicone antenna - specifically using logarithmically extending conical surfaces with controlled angles (15-45 degrees from vertical) and aspect ratios (0.5-2.0) to achieve wideband operation with improved impedance matching and reduced return loss across the frequency range
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 design achieves high gain and low return loss across a wide frequency range, improving antenna efficiency and directivity while minimizing assembly complexity and manufacturing costs through additive manufacturing techniques.
Implementation Method 1
the antenna can act as a traveling wave antenna, to allow for multi-directional operation over a wide frequency range
Data Source
AI summary
A bicone antenna and methods for manufacture therefor can include a feed portion, a top section and a bottom section that can be centered on a vertical axis. The top section and bottom sections can each have a respective conical surface, which can extend radially outward from the vertical axis at an inner portion at a constant angle θ1 with respect to a horizontal antenna axis of the antenna. For both sections, the inner portion can merge into an outer portion that can have a curved surface, with the curved surface extending radially outward from the conical surface so that the curved surface has a logarithmic profile when viewed in side profile. The above structure can allow for a multi-directional antenna with a minimum of moving parts, which can be easily manufactured, including by additive manufacturing techniques.