Wireless Magnetic Contact Antenna Layout for Concealed Intrusion Detection
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Solution Overview
Problem
Conventional intrusion detectors are visible and require wiring for communication, making them detectable and unreliable due to interference, necessitating a concealed, wireless two-way communication solution.
Innovation Solution
A compact, wireless door/window intrusion detector assembly with a fixed magnetic contact transceiver and antenna, utilizing a gold-plated copper substrate and stainless steel ground reference plane for high-frequency communication, enabling reliable two-way wireless communication and tamper detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If intrusion detectors are made small and concealed, then visibility to intruders is reduced, but communication reliability may deteriorate due to limited space for antennas and wiring
Solution Approach 1:
The patent replaces wired mechanical communication systems with wireless electromagnetic communication. The antenna element and ground reference plane create a resonant structure that enables reliable two-way wireless communication without physical wiring, solving the contradiction by eliminating the need for extensive wiring in confined spaces while maintaining communication reliability through electromagnetic resonance at specific frequencies.
Solution Approach 2:
The patent optimizes the physical parameters of the antenna system, including the dimensions of the antenna element (0.03 to 0.06 lambda), ground reference plane (0.1 to 0.2 lambda), and spacing (0.01 to 0.05 lambda), to achieve reliable communication within the constrained volume of the detector assembly. These parameter adjustments enable the small detector to maintain effective wireless communication.
2Device complexity
If wireless communication is implemented, then installation complexity is reduced by eliminating wiring, but communication may be blocked or interfered with by physical obstacles
Solution Approach 1:
The patent replaces physical wiring with wireless electromagnetic communication, eliminating installation complexity associated with wiring while addressing communication reliability through the design of a resonant antenna system with optimized dimensions and ground plane that operates at specific frequencies to penetrate or绕过 obstacles effectively.
Solution Approach 2:
The antenna assembly serves multiple functions: it provides two-way communication, establishes electromagnetic resonance, and maintains a compact form factor. This multi-functionality allows the system to achieve reliable communication without additional components that would increase installation complexity.
3Reliability
If conventional antennas are used in compact detectors, then communication functionality is achieved, but the physical profile becomes too large to conceal
Solution Approach 1:
The patent integrates the antenna element, ground reference plane, and resonant cavity into a nested, multi-layered structure where components are stacked vertically or layered within the housing. This nesting approach allows the antenna system to achieve the necessary electromagnetic dimensions for reliable communication while maintaining a compact external profile suitable for concealment.
Solution Approach 2:
The patent transitions from planar antenna layouts to three-dimensional stacked configurations, utilizing vertical spacing and layered structures to achieve the required electromagnetic dimensions without increasing the horizontal footprint. This dimensional transition enables the antenna system to maintain communication functionality while reducing the overall detector volume and profile.
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 concealed, reliable, and interference-resistant two-way wireless communication system for intrusion detection, enhancing security by minimizing visibility and interference, while maintaining a small physical profile.
Implementation Method 1
an antenna including a substrate, a top surface of the substrate being coated with a gold plated copper substrate coating, the coating having a gap formed therein, and half via holes formed in a perimeter of the antenna
Implementation Method 2
an antenna facilitating the two-way wireless communication between the fixed magnetic contact wireless transceiver component and the intrusion alarm system
Implementation Method 3
a top surface of the substrate being coated with a gold plated copper substrate coating
Implementation Method 4
gold plated copper substrate coating, the coating having a gap formed therein
Implementation Method 5
a REED switch operable for sensing changes in a magnetic field induced by the magnet component
Implementation Method 6
sensing changes in a magnetic field induced by the magnet component
Data Source
AI summary
A fixed magnetic contact wireless transceiver including a two-way transceiver element adapted to be operable for two-way wireless communication between a fixed magnetic contact wireless transceiver component and an intrusion alarm system, an antenna facilitating the two-way wireless communication between the fixed magnetic contact wireless transceiver component and the intrusion alarm system, and an antenna ground reference plane, opposite the antenna, wherein the antenna includes a substrate, a top surface of the substrate being coated with a gold plated copper substrate coating, the coating having a gap formed therein, and half via holes formed in a perimeter of the antenna, the half via holes being coated with gold plated copper half via hole coatings which form a continuum with the gold plated copper substrate coating.