Closed-Loop Parasitic Element Antenna Tuning
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Solution Overview
Problem
Modal antenna systems face limitations in achieving a wide tuning range and efficient frequency coverage due to the lack of effective control over radiation patterns and polarization states, particularly in compact form factors.
Innovation Solution
The antenna system incorporates a closed-loop parasitic element with independent couplings, including tunable components like switches and capacitors, to adjust electrical characteristics and radiation patterns, allowing for improved beam steering and frequency response across a broader range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parasitic element is used to alter radiation pattern, then signal quality is improved, but the tuning range and frequency coverage are limited
Solution Approach 1:
The patent applies dynamics by making the parasitic element's coupling to the ground plane adjustable through tunable components (switches and capacitors). This allows the electrical characteristics and radiation patterns to be dynamically reconfigured, enabling the antenna to adapt to different frequency bands and operational modes, thereby resolving the contradiction between maintaining signal quality and expanding tuning range.
Solution Approach 2:
The patent changes electrical parameters by introducing tunable capacitors and switches that modify the coupling between the parasitic element and ground plane. By varying capacitance values and connection states, the antenna's resonant frequencies and radiation characteristics are adjusted, allowing operation across multiple frequency bands while maintaining optimal signal quality in each mode.
2Device complexity
If the antenna system uses fixed coupling for the parasitic element, then structural simplicity is maintained, but frequency coverage and beam steering capability are reduced
Solution Approach 1:
The patent transforms the static coupling structure into a dynamic one by incorporating switches and capacitors. The first coupling includes tunable components that allow reconfiguration of the parasitic element's electrical connection to the ground plane, enabling frequency tuning and beam steering without fundamentally complicating the overall structural layout.
Solution Approach 2:
The patent achieves multi-functionality by designing the coupling structure to serve multiple purposes: it provides structural support, establishes electrical connection, and enables frequency tuning through the same physical interface. The tunable components integrated into the coupling allow a single structure to adapt to different frequency bands and radiation patterns.
3Productivity
If independent couplings are added to the parasitic element, then tuning range and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent segments the coupling function into two independent couplings: a first coupling with tunable components for frequency adjustment and a second fixed coupling for structural support and grounding. This segmentation allows each coupling to be optimized for its specific function, improving overall efficiency while keeping the complexity of each individual coupling manageable.
Solution Approach 2:
By making only the first coupling tunable while keeping the second coupling fixed, the patent introduces dynamic adjustment capability where needed (for frequency tuning) while maintaining structural simplicity elsewhere. This selective application of dynamics optimizes peak efficiency without unnecessarily increasing overall device complexity.
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 configuration enhances the antenna's tuning range and peak efficiency across a wider frequency band, enabling better signal quality and compact form factor designs.
Implementation Method 1
a parasitic element configured to alter a radiation pattern associated with a driven element
Implementation Method 2
The first coupling can include one or more tunable components
Implementation Method 3
The first coupling can include one or more tunable components
Data Source
AI summary
An antenna system can include a ground plane and a driven element spaced apart from the ground plane. The antenna system can include a parasitic element disposed proximate to the driven element. The parasitic element can be coupled to the ground plane by a first coupling and a second coupling. The second coupling can be independent from the first coupling. For instance, the first coupling can include one or more tunable components. The second coupling can fix the parasitic element to the ground plane.