Direction-Finding Antenna Installation in Radome
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Solution Overview
Problem
Modern mobile units such as vehicles and ships face challenges in installing direction-finding antennas efficiently due to space constraints and the need for antennas to cover wide frequency ranges, often requiring multiple subsystems with compromised dimensions and sensitivity.
Innovation Solution
The arrangement involves attaching multiple dipole antenna elements equidistantly inside a radome's outer shell, using self-adhesive metallic foil or vapor-deposited materials, and connecting them with feedlines to antenna electronics, allowing for efficient direction-finding across various frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DF antenna subsystems for lower frequencies are made with large dimensions to achieve sufficient efficiency, then antenna sensitivity is improved, but the available space on mobile units is exceeded
Solution Approach 1:
The patent implements nesting by placing multiple DF antenna subsystems (for different frequency ranges) inside a single radome structure. The lower frequency subsystem with larger effective height is nested within the same protective enclosure as upper frequency subsystems, allowing optimal dimensions for sensitivity without exceeding mobile unit space constraints
Solution Approach 2:
The patent transitions from horizontal/planar antenna arrangements to vertical three-dimensional positioning by mounting antenna elements at different heights on the radome interior surface. This vertical dimensionality allows achieving the required effective height for lower frequencies while maintaining a compact footprint suitable for mobile units
2Volume of moving object
If DF antenna subsystems for upper frequency ranges are made compact to fit mobile units, then space constraints are satisfied, but antenna sensitivity is compromised
Solution Approach 1:
The patent segments the DF antenna system into multiple independent subsystems, each optimized for specific frequency ranges (VHF, UHF, L-band). Each subsystem can be independently sized and positioned within the radome, allowing compact upper frequency subsystems to be placed strategically without compromising overall system sensitivity
Solution Approach 2:
By utilizing vertical positioning and three-dimensional space within the radome, the patent allows compact upper frequency antenna elements to be optimally positioned in the vertical dimension, achieving sufficient effective height and sensitivity without increasing horizontal footprint
3Adaptability or versatility
If multiple DF antenna subsystems are installed to cover wide frequency ranges, then frequency coverage is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple DF antenna subsystems for different frequency ranges (VHF, UHF, L-band) into a single integrated radome structure with unified mounting and protection. This consolidation achieves wide frequency coverage while reducing overall system complexity compared to separate antenna installations
Solution Approach 2:
The radome structure serves multiple functions simultaneously: it protects all antenna subsystems, provides the mounting structure for diverse frequency ranges, and maintains aerodynamic/streamlined properties. This multi-functionality reduces the need for separate structures for each frequency subsystem
4Measurement precision
If DF antenna is mounted on the highest point of mobile unit for optimal location, then direction-finding accuracy is improved, but space availability is reduced due to other antennas and sensors
Solution Approach 1:
The patent utilizes the vertical interior surface of the radome as a mounting dimension, allowing antenna elements to be positioned at optimal heights for direction-finding accuracy without competing for horizontal mounting space on the vehicle exterior. The radome's three-dimensional interior provides ample vertical positioning options
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
This solution enables optimal antenna sensitivity and efficient direction-finding capabilities across a wide frequency range, even in compact mobile systems, by optimizing antenna placement and design within the radome.
Implementation Method 1
The subsequently installed antenna elements or dipoles can be subsequently glued into the radome from metallic self-adhesive foil
Implementation Method 2
The at least one antenna element can also be metallically vapour-deposited on the inside of the outer shell of the radome
Data Source
AI summary
The invention relates to an assembly for installing a direction-finding antenna in a radome, preferably for retrofitting a direction-finding antenna in a radome, comprising: at least one antenna element, which is attached to the inside of an outer shell of the radome, wherein the direction-finding antenna is suitable preferably for use in an interferometer direction-finding method and/or in an Adcock direction-finding method, especially preferably for use in a correlative interferometer direction-finding method, and further especially preferably for use in mobile systems suitable for performing at least one of said direction-finding methods. The invention further relates to a method for installing a direction-finding antenna in a radome, preferably for retrofitting a direction-finding antenna in a radome, comprising the following step: attaching at least one antenna element to the inside of an outer shell of the radome, wherein the direction-finding antenna is suitable preferably for use in an interferometer direction-finding method and/or in an Adcock direction-finding method, especially preferably in a correlative interferometer direction-finding method, and further especially preferably for use in mobile systems suitable for performing at least one of said direction-finding methods.