Multiband Bung Antenna Using Helical Elements
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Solution Overview
Problem
There is a need for compact antenna arrangements that can operate in multiple frequency bands, such as VHF, UHF, and S bands, while being compatible with Wi-Fi and Bluetooth protocols, and also capable of simultaneous or successive communication in different frequency bands, which poses challenges in terms of form factor, power budget, and material usage.
Innovation Solution
The development of an antenna arrangement using primary and secondary conductive elements, such as trunks, branches, and leaves, which can be assembled from a library of components to match specific resonating frequencies, bandwidths, and form factors, allowing for a wide frequency domain with controlled bandwidths and compact integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional omnidirectional monopole antennas are used for VHF bands, then adequate radiation performance is achieved, but the antenna length becomes excessively long (25 cm to 2.5 m)
Solution Approach 1:
The patent transforms the traditional linear monopole antenna into a three-dimensional bung-type structure by winding the conductive element in a helical or coiled configuration. This dimensional transformation allows the antenna to achieve the necessary electrical length for VHF radiation while occupying a much smaller physical space, reducing the length from meters to centimeters.
Solution Approach 2:
The patent embeds multiple antenna elements within a compact bung-type housing structure. The helical conductive elements are nested within each other and contained within the bung body, allowing multiple radiation elements to coexist in a small volume while maintaining their individual radiation characteristics.
2Adaptability or versatility
If multiple separate antennas are added to support different frequency bands (VHF, S, L bands), then multi-band compatibility is achieved, but the form factor, power budget, and material usage increase significantly
Solution Approach 1:
The patent designs a single bung-type antenna structure that can operate across multiple frequency bands (VHF, UHF, S, and L bands) by utilizing different resonant modes of the same conductive elements. The helical structure supports fundamental modes for lower frequencies and higher-order modes for higher frequencies, eliminating the need for separate antennas for each band.
Solution Approach 2:
The patent combines multiple antenna functions into a single integrated bung-type structure. By winding conductive elements in a helical configuration and strategically positioning them within the bung body, the design merges VHF, UHF, S-band, and L-band capabilities into one compact unit, reducing overall system complexity.
3Volume of moving object
If compact antenna structures are designed to fit small form factors, then integration efficiency is improved, but the available bandwidth and radiation range are reduced
Solution Approach 1:
The patent uses three-dimensional helical winding to pack more electrical length into a smaller volume. The helical structure provides the necessary path length for low-frequency resonance while maintaining a compact footprint, enabling VHF band operation in a small bung-type housing.
Solution Approach 2:
The patent utilizes the dynamic resonant characteristics of the helical structure to achieve multi-band operation. By adjusting the resonant modes of the same physical structure, the antenna can dynamically adapt to operate at different frequency bands (fundamental mode for VHF, higher-order modes for S and L bands) without physical reconfiguration.
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 solution provides a compact, easily designable, and cost-effective antenna arrangement that can operate in multiple frequency bands, ensuring efficient integration and high throughput, while being simple to manufacture and connect to RF PCBs.
Implementation Method 1
a primary conductive element having defined geometric parameters, the primary conductive element having a proximal end and a distal end, the proximal end being connected at a feed line, the distal end being an open circuit position, the primary conductive element defining a first plurality of resonating frequencies
Data Source
AI summary
An antenna arrangement that is designed to match, or approach based on a cost function, a specification includes a list of a plurality of predefined frequencies and, possibly a list of predefined bandwidths at a matching level. The antenna arrangement is designed using a plurality of predefined elements comprising a primary conductive element defined as a main trunk and a combination of secondary conductive elements selected from trunks, branches or leaves. The primary conductive element and the secondary conductive elements are defined by design parameters that comprise a susceptance that is a function of a geometry, a form factor, a main dimension, an orientation of the secondary conductive elements relative to the primary conductive element and a position of the secondary conductive elements on the primary conductive element. The antenna arrangement may be further defined to match a predefined form factor.