Submarine Antenna Module Axial Dipole Segmentation
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Solution Overview
Problem
Submarine antenna systems face challenges in accommodating multiple frequency ranges within limited space while ensuring mechanical stability and compactness, as traditional modular antenna systems are often too long and prone to mechanical instability due to water pressure and flow.
Innovation Solution
The antenna module uses shared physical components, such as a broadband dipole and a cross-fold dipole antenna, arranged axially with additional segments and a loop antenna, allowing independent operation and minimizing interference, thus achieving compactness and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional modular antenna systems are used to cover multiple frequency ranges, then communication functionality across different frequency ranges is improved, but the overall length and mechanical stability deteriorate due to water pressure and flow
Solution Approach 1:
The patent combines multiple antenna radiators (VHF, UHF, and other frequency ranges) into a single integrated antenna body with a total length of λ/2. The antenna body is divided into multiple sections that can function as different radiators, allowing one physical structure to serve multiple communication frequency ranges simultaneously, thereby improving mechanical stability while maintaining versatility
Solution Approach 2:
The antenna body is designed as a universal structure that can function as different radiators for various frequency ranges. By appropriately adapting short-circuit lines and using the same antenna body for multiple purposes (VHF low, VHF, UHF, and other ranges), the system achieves multi-functionality without requiring separate antenna structures for each frequency range
2Adaptability or versatility
If multiple separate antennas are used to cover different frequency ranges, then communication functionality is improved, but the space required and device complexity increase
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated structure. The antenna body with total length λ/2 is divided into sections that can serve as different radiators, eliminating the need for multiple separate antenna structures and reducing overall system complexity
Solution Approach 2:
The same antenna body structure is designed to be universally applicable across multiple frequency ranges by adapting short-circuit lines. This universal design allows one physical antenna to replace what would traditionally require multiple separate antennas, simplifying the overall device structure
3Length of moving object
If the antenna body length is reduced to fit within submarine hulls, then compactness is improved, but the ability to achieve resonant radiation in ultrashort wave range deteriorates
Solution Approach 1:
The antenna body is segmented into multiple sections along its length, with each section capable of functioning as a radiator for specific frequency ranges. The segmentation allows the total length to be λ/2 while enabling different portions to resonate at different frequencies, maintaining reliable resonant radiation capability across ultrashort wave and other frequency ranges
Solution Approach 2:
The patent uses parameter changes in the form of adaptably configured short-circuit lines to modify the electrical characteristics of different antenna sections. By changing the electrical parameters (through short-circuit line adaptation) rather than physically changing the antenna length, the system achieves resonant radiation at multiple frequencies including ultrashort wave range while maintaining a compact overall size
Data Source
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AI summary
The antenna module (1) has two independently operable broadband dipole antenna (2) and cross-folded dipole antenna (3) which are arranged axially in opposite manner, on a common axis. The broadband dipole antenna comprises two half-shells (6,7) with the convex outer side oriented in the axial direction. A hollow central cylinder (9) is arranged in the cross-folded dipole antenna. Several segments (7a-7d) are provided in outer shell of cross-folded dipole antenna.