Conformable Waveguide Antenna with Mode Barrier Filter
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Solution Overview
Problem
Conventional antenna systems for wireless electronic devices face limitations due to power loss, inefficiencies, and size constraints, which restrict bandwidth, gain, and radiation pattern, particularly in compact devices, and existing waveguide antennas are not well-suited for small electronic devices due to size and shape limitations.
Innovation Solution
A conformable waveguide antenna assembly with a first and second conductive layer, an electrically isolating channel, and a mode barrier filter to reduce internal transmission coupling, allowing for adaptable antenna designs that support waveguide modes and enable beam steering by adjusting excitation points and phase coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional waveguide antennas are used, then coupling and detuning issues are addressed, but size and shape limitations preclude adaptation to compact wireless electronic devices
Solution Approach 1:
The patent employs thin film conductive layers (first and second conductive layers) separated by a thin electrically isolating channel, creating a flexible waveguide structure that can be conformally integrated into compact devices while maintaining waveguide mode propagation and reducing coupling issues
Solution Approach 2:
The patent transforms the conventional cylindrical waveguide geometry into a planar conformable structure by changing the dimensional parameters and configuration of conductive layers, allowing the antenna to adapt to compact device form factors while preserving electromagnetic performance
2Volume of moving object
If conventional antenna systems are used, then physical size constraints are met, but power loss and inefficiencies limit bandwidth and gain
Solution Approach 1:
The patent replaces conventional mechanical antenna structures (wire, PIFA, resonant loop, patch, stripline) with an electromagnetic waveguide system that propagates modes through isolated conductive layers, reducing resistive losses and improving efficiency while maintaining compact dimensions
Solution Approach 2:
The patent uses a composite structure combining conductive layers with electrically isolating materials to create a low-loss transmission path for electromagnetic waves, improving power efficiency and reducing energy loss in compact configurations
3Adaptability or versatility
If multiple excitation points are used in waveguide antennas, then radiation pattern control is improved, but internal transmission coupling between excitation points causes energy loss
Solution Approach 1:
The patent introduces an electrically isolating channel as an intermediary between excitation points and conductive layers, which prevents harmful electromagnetic coupling between multiple excitation points while allowing independent control of radiation patterns through each excitation point
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 enhanced antenna performance by reducing detuning, increasing adaptability to compact device designs, and enabling dynamic radiation pattern redirection, while minimizing physical size and coupling losses, thus overcoming limitations of conventional antennas.
Implementation Method 1
an electrically isolating channel extending between the inner surface of the first conductive layer and the second conductive layer, wherein the electrically isolating channel is dimensionally configured for transmission of the waveguide modes of the predetermined frequency range
Implementation Method 2
an aperture for electromagnetically transceiving the signals
Implementation Method 3
a back short spaced back from the aperture a predetermined distance equal to a resonant length of the waveguide mode wavelength, wherein the back short provides a circuit impedance between the first conductive layer and the second conductive layer for tuning the waveguide to transceive the signals
Implementation Method 4
at least one excitation point coupled to the aperture to propagate waveguide modes within the electrically isolating channel supported by a mode barrier filter for reducing internal transmission coupling between the plurality of excitation points
Data Source
AI summary
A waveguide antenna assembly conformable to the configuration of a supported device for transceiving signals of a predetermined radio frequency range comprising at least two collaterally aligned conductive layers configured in a conformable loop so as to form an electrically isolating channel dimensionally configured for support of the waveguide modes of the predetermined frequency range, an aperture for electromagnetically transceiving the signals, wherein the aperture extends along a surface of the electrically isolating channel such that the aperture extends between the outer edge of the inner surface of the first conductive layer and the second conductive layer, a back short spaced apart from the aperture a predetermined distance equal to a resonant length of the waveguide mode wavelength so as to provide a circuit impedance between the first conductive layer and the second conductive layer for tuning the waveguide to transceive the signals, excitation points coupled to the aperture to propagate waveguide modes within the electrically isolating channel for transceiving signals, and mode barrier filters longitudinally oriented in the first conductive layer and the second conductive layer to impede coupling between excitation points. A preferred embodiment of the present waveguide antenna strategically orients the mode barrier filters to enhance antenna transceiving and can be used to support switched TEM and H11 waveguide modes.