Marine Display Antenna Layout for Metal Dash Interference
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Solution Overview
Problem
The performance of marine electronics devices is adversely affected by metal dashes in watercraft due to interference with electromagnetic waves, leading to reduced signal strength and space constraints.
Innovation Solution
A planar inverted F antenna (PIFA) is secured onto the back surface of the LCD screen, with a dielectric housing covering the antenna to provide clearance from the metal dash, allowing electromagnetic waves to propagate without interference, and a conductive frame acting as an extension of the ground portion to enhance signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the antenna is positioned on the side of the housing, then the antenna can be easily integrated into the device structure, but the metal housing and metal dash form an enclosure that interferes with antenna performance
Solution Approach 1:
The antenna is repositioned from the side surface to the back surface of the display screen, utilizing the z-dimension (depth) rather than the x-y plane. This dimensional shift allows the antenna to be placed in a location where the housing can provide shielding from the metal dash while maintaining signal propagation paths, thus resolving the conflict between easy integration and performance reliability
Solution Approach 2:
The housing acts as an intermediary element positioned between the antenna and the metal dash. By placing the antenna on the back surface of the display, the housing structure serves as a protective barrier that shields the antenna from interference caused by the metal dash, thereby improving antenna performance without complicating the manufacturing process
2Object-affected harmful factors
If the antenna is positioned away from metal components, then interference is reduced, but space constraints and reduced performance still occur
Solution Approach 1:
The ground portion of the antenna is specifically configured to extend in parallel planes with the radiating element, creating a localized optimized structure on the back surface of the display. This local quality enhancement ensures that the antenna maintains strong signal characteristics in the specific region where it is positioned, compensating for the distance from metal components while reducing interference
3Reliability
If additional space is provided between the marine electronics device and the dash, then antenna performance is improved, but the device cannot be flush with the dash
Solution Approach 1:
Instead of creating additional space in the forward direction (which would prevent flush integration), the antenna is positioned on the back surface of the display, utilizing the depth dimension. This allows the front of the device to remain flush with the dash while the antenna operates in the rear space, achieving both flush integration and improved antenna performance
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 improves wireless transmission capabilities by minimizing interference from metal dashes while maintaining a flush integration with the dash, enhancing signal strength and reducing space constraints.
Implementation Method 1
The at least one antenna element defines a radiating element for transmitting and receiving a wireless signal
Implementation Method 2
since the housing comprises a plastic or dielectric material, the housing provides a path for electromagnetic waves, without interference from the metal in the dash
Implementation Method 3
The ground portion is in electrical communication with the conductive bracket, thereby causing the conductive frame to act as an extension of the ground of the at least one antenna
Implementation Method 4
By making the frame a resonant structure of the at least one antenna, the radiated signal strength increases even when mounted in a metal dash
Data Source
AI summary
Electronic devices and antenna systems/assemblies for mounting in a dash of a watercraft are provided herein. The electronics device comprises a liquid crystal display (LCD) comprising a screen defining a first surface opposing a second surface, and a frame attached to the second surface. The frame is a conductive material. The electronics device further comprises at least one antenna element attached to the frame of the LCD. The at least one antenna element defines a radiating element for transmitting and receiving a wireless signal and a ground portion each extending in parallel planes. The ground portion is attached to and in electrical communication with the frame. The electronics device further comprises a cable extending from the ground of the at least one antenna, wherein the cable enables data communication between the at least one antenna and a printed circuit board.