Surface Scattering Antennas with Adjustable Lumped Elements
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Solution Overview
Problem
Current surface scattering antennas lack the ability to efficiently adjust radiation patterns and beam directions in real-time, limiting their adaptability to varying communication needs and environmental conditions.
Innovation Solution
The implementation of adjustable scattering elements along a wave-propagating structure, such as a substrate-integrated waveguide, allows for the adjustment of electromagnetic properties in response to external inputs, enabling dynamic control over the radiation patterns and beam directions by altering the couplings of scattering elements to the guided or surface wave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If surface scattering antennas use fixed scattering elements, then the structure is simple and easy to manufacture, but the radiation patterns and beam directions cannot be adjusted in real-time
Solution Approach 1:
The patent applies the dynamics principle by making the scattering elements adjustable rather than fixed. Each scattering element can change its electromagnetic properties (such as impedance or resonance frequency) in response to external control signals, enabling real-time adjustment of radiation patterns and beam directions. This transforms a static antenna structure into a dynamic, reconfigurable system that can adapt to different communication scenarios.
Solution Approach 2:
The patent implements parameter changes by modifying the electromagnetic parameters (such as impedance, capacitance, or inductance) of the scattering elements through external control. By changing these parameters dynamically, the antenna can steer beams and adjust radiation patterns without physical movement, resolving the contradiction between adaptability and device complexity.
2Ease of operation
If surface scattering antennas use adjustable scattering elements, then radiation patterns and beam directions can be controlled dynamically, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with electrical or electromagnetic control of the scattering elements. Instead of physically moving or reconfiguring antenna elements, the system uses electronic tuning of impedance or resonance characteristics, which simplifies the control system while maintaining real-time adjustability and improving ease of operation.
3Volume of moving object
If surface scattering antennas use lumped elements, then the scattering elements become more compact and integrable, but the manufacturing precision requirements increase
Solution Approach 1:
The patent integrates lumped elements (such as capacitors or inductors) within or alongside the scattering element structures, creating a compact nested configuration. This nesting approach reduces the overall volume of each scattering element while consolidating multiple functions into integrated components, thereby reducing the tolerance requirements for separate component placement and lowering manufacturing precision requirements.
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 enables the surface scattering antenna to produce adjustable radiation patterns, beam steering, and polarization control, enhancing its adaptability and performance in various communication scenarios.
Implementation Method 1
adjustable scattering elements having electromagnetic properties that are adjustable in response to one or more external inputs, wherein the adjustable scattering elements are responsive to the guided wave or surface wave to produce a plurality of scattered electromagnetic waves
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Surface scattering antennas with lumped elements provide adjustable radiation fields by adjustably coupling scattering elements along a wave-propagating structure. In some approaches, the surface scattering antenna is a multi-layer printed circuit board assembly, and the lumped elements are surface-mount components placed on an upper surface of the printed circuit board assembly. In some approaches, the scattering elements are adjusted by adjusting bias voltages for the lumped elements. In some approaches, the lumped elements include diodes or transistors.