Pseudo-conductor Antennas for Wideband Conformal Radiation
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Solution Overview
Problem
Conventional antennas face limitations in achieving wideband conformal applications due to signal loss and bandwidth constraints, particularly when positioned on electrically conducting surfaces, as they often require high-index dielectric substrates that trap surface waves and limit the quarter wave effect's bandwidth.
Innovation Solution
The use of pseudo-conductor materials with a real part of electromagnetic constitutive properties greater than the imaginary part, such as high permeability or permittivity, to weakly guide electromagnetic waves and radiate emissions, allowing for the design of antennas that can operate effectively even when electrically small and conformal to conducting surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional electrically conductive antennas are used on conducting surfaces, then antenna functionality is achieved, but signal loss increases and bandwidth is limited
Solution Approach 1:
The patent changes the fundamental electromagnetic parameters of the antenna material from electrically conductive (high electrical permittivity with imaginary part much greater than real part) to pseudo-conductive (real part greater than imaginary part). This parameter transformation allows the antenna to operate on conducting surfaces without the traditional signal loss and bandwidth limitations, achieving wideband efficiency while maintaining conformal radiation capability
Solution Approach 2:
The invention employs composite material structures combining pseudo-conductor materials with traditional conductive elements. The pseudo-conductor material serves as the primary radiating element while maintaining electrical isolation from the conducting surface, creating a hybrid system that achieves both wideband performance and conformal integration without the adverse effects of direct conductor-conductor contact
2Shape
If high-index dielectric substrates are used to support antennas on conducting surfaces, then conformal radiation is achieved, but surface waves are trapped and bandwidth is limited
Solution Approach 1:
The patent extracts the antenna element from direct contact with the conducting surface by introducing a pseudo-conductor material that provides electrical isolation. This extraction eliminates the need for high-index dielectric substrates to provide electrical isolation, thereby preventing surface wave trapping while maintaining conformal radiation capability
Solution Approach 2:
The pseudo-conductor material serves as an intermediary between the antenna and the conducting surface. It provides the necessary electrical isolation to prevent surface wave trapping while maintaining the conformal geometry, acting as a mediator that enables both wideband operation and conformal radiation without the limitations of traditional dielectric substrates
3Loss of energy
If electrically conductive materials are used for antennas, then radiation efficiency is achieved, but material usage and weight increase
Solution Approach 1:
The patent employs pseudo-conductor materials that can be implemented as thin-film structures or printed circuits, replacing bulky traditional conductive materials. These pseudo-conductor implementations achieve radiation efficiency through their unique electromagnetic properties while using significantly less material, effectively treating the radiating structure as a lightweight, minimally invasive element
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
Pseudo-conductor antennas can achieve wideband efficiency and input matching, approaching the Fano-Chu limit, while reducing material usage and weight, and avoiding the adverse effects associated with electrically conductive antennas, thus enabling conformal radiation with improved performance and reduced size.
Implementation Method 1
The pseudo-conductor material is configured to weakly guide displacement currents on the pseudo-conductor material to radiate or receive electromagnetic energy
Implementation Method 2
materials having an electromagnetic constitutive property that has a real component that is greater than the imaginary component are referred to as pseudo-conductors
Implementation Method 3
an antenna circuit coupled to the pseudo-conductor material and configured to excite the pseudo-conductor material to radiate the electromagnetic energy or to receive the electromagnetic energy received by the pseudo-conductor material
Data Source
AI summary
Techniques, devices and systems use pseudo-conductor materials as antennas to receive or radiate electromagnetic energy for communications and other applications. Methods of configuring an antenna can include, in some implementations, selecting a pseudo-conductor material having an electromagnetic constitutive property, wherein the electromagnetic constitutive property comprises a real part of the electromagnetic constitutive property that is greater than a corresponding imaginary part of the electromagnetic constitutive property; and forming the pseudo-conductor material into an antenna shape configured, upon being excited, to radiate emissions that satisfy a predefined antenna performance, such that the pseudo-conductor material formed in the antenna shape weakly guides an electromagnetic wave on the pseudo-conductor material using a leaky mode that is below cutoff to establish a field structure to radiate the emissions from the pseudo-conductor material that satisfy the antenna performance.