Crossed-Dipole Antenna Perpendicularity via Solder Joints
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Solution Overview
Problem
Existing crossed-dipole antenna arrays face challenges in maintaining perpendicularity between substrates, especially at higher frequencies where smaller structures and closer spacings make conventional connection methods problematic, leading to instability and reduced performance.
Innovation Solution
The crossed-dipole antenna array structure employs a combination of 'egg crating' engagement with rails or a tab-and-hole structure to establish and maintain perpendicularity between dipole and crossing dipole cards, using solder joints for both electrical and mechanical connection, and incorporates a heat sink for thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connection methods (egg crate technique with braces or mounting slots) are used to establish perpendicularity between substrates, then mechanical connection is achieved, but the substrates can still rotate relative to one another leading to instability and reduced performance
Solution Approach 1:
The patent combines mechanical engagement (egg crate technique) with solder joints to create a unified connection system. The solder joints merge the electrical connection function with the mechanical stabilization function, eliminating the rotation problem that plagues conventional methods that rely solely on mechanical engagement.
Solution Approach 2:
The solder joints serve multiple functions simultaneously: they provide electrical connection between the substrates and establish the mechanical perpendicularity relationship. This multi-functionality resolves the contradiction by making a single connection method accomplish both electrical and mechanical stabilization tasks.
2Productivity
If the operating frequency is increased, then the antenna size and spacing are reduced, but conventional connection methods become problematic leading to instability
Solution Approach 1:
The patent merges the electrical interconnection function with the mechanical perpendicularity-establishment function into the solder joint system. This integrated approach ensures that even at higher frequencies with smaller structures, the connection remains stable because the solder provides both electrical continuity and mechanical rigidity.
Solution Approach 2:
The patent replaces the purely mechanical brace or slot-based perpendicularity establishment with a solder joint-based system. The solder joints, once applied, create a rigid mechanical connection that is more reliable than mechanical engagement alone, especially for the smaller structures required at higher frequencies.
3Ease of manufacture
If multiple dipoles are integrated on separate substrates, then modular assembly is enabled, but establishing and maintaining perpendicularity becomes difficult
Solution Approach 1:
The patent combines the electrical interconnection task with the perpendicularity-establishment task into the solder joint process. This allows modular substrates to be assembled independently and then connected with precision, as the solder joints simultaneously achieve both electrical connection and precise angular alignment.
Solution Approach 2:
The substrates can be prepared independently with their dipole patterns and connection points established beforehand. The solder joints then serve as the final action that simultaneously achieves both electrical connection and precise perpendicular alignment, eliminating the need for complex alignment procedures during assembly.
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 approach ensures high perpendicularity and stability between cards, enhancing the performance of crossed-dipole antennas across various frequency bands and reducing thermal issues, allowing for efficient operation and easy modular assembly.
Implementation Method 1
The rails serve to facilitate perpendicularity between the cards, function as part of a crossed-dipole antenna, provide solder surfaces that, if used, substantially fix the perpendicularity established by the interaction of the rails and the card surfaces, and establish electrical connections between the crossing dipole and the feed circuitry located on the dipole card.
Implementation Method 2
the power amplifier that is part of the feed circuitry for each of the dipole and crossing dipole antennas is established on one side of the dipole card... The other planar surface of the heat sink is thermally connected to one of the two pieces of the reflector.
Implementation Method 3
A heat sink is thermally connected to the power amplifier and to one of the two pieces of the reflector.
Data Source
AI summary
The invention is directed to a crossed-dipole antenna structure that, in one embodiment, is comprised of: (a) a first planar dielectric substrate with a feed portion and an antenna portion that supports a first dipole antenna and (b) a second planar dielectric substrate that supports a second dipole antenna or substantial portion of such an antenna. The first and second planar dielectric substrates are positioned substantially perpendicular to one another and so as to form a crossed-dipole antenna from the first and second dipole antennas. The feed portion of the first planar dielectric substrate is electrically and mechanically connected to the second planar substrate by a plurality of solder joints established in the corners defined by the intersections of the first and second planar dielectric substrates.