Multi Mode Antenna System with Switching Networks
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Solution Overview
Problem
Current active antenna systems lack independent tuning of frequencies and provide only small shifts in resonant frequency, limiting their ability to efficiently accommodate multiple wireless networks within a compact size constraint.
Innovation Solution
The implementation of a dual or quad mode antenna system using conductive plates and a slot element, with active switching networks that allow for independent control of ground and signal feed connections, enabling multiple operating modes and larger frequency shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna size is increased to accommodate additional bandwidth, then the bandwidth is improved, but the handset size increases
Solution Approach 1:
The patent employs switchable ground connections and feed connections that dynamically reconfigure the antenna elements between different operating states. This allows a single antenna structure to adapt its electrical characteristics and resonate at different frequencies, providing multiple bandwidths without increasing physical size. The switching mechanism enables the antenna to transition between wideband and narrowband modes, accommodating various wireless networks within the same compact footprint.
Solution Approach 2:
The antenna system is designed to perform multiple functions using a single physical structure. By implementing switchable connections that can configure the antenna elements in different arrangements, the system provides support for multiple wireless networks and frequency bands. This multi-functionality allows the same antenna hardware to serve various communication standards (e.g., GSM, CDMA, WCDMA) without requiring separate dedicated antennas for each network type.
2Volume of moving object
If the antenna size is decreased to accommodate smaller handsets, then the handset size is reduced, but the antenna performance decreases
Solution Approach 1:
The compact antenna maintains high performance through dynamic reconfiguration capabilities. The switchable ground and feed connections enable the small antenna structure to electrically transform into different resonant configurations, effectively providing the performance characteristics of larger antennas when needed. This dynamic adaptation allows the compact antenna to achieve wideband operation or narrowband optimization depending on the specific network requirements, maintaining high efficiency despite reduced physical dimensions.
Solution Approach 2:
The patent utilizes parameter changes in the electrical configuration of the antenna elements to maintain performance in a compact size. By switching ground connections and feed points, the system changes the effective electrical length and resonant frequency of the antenna elements without physically altering their dimensions. This parameter reconfiguration allows the same physical structure to achieve different performance levels suitable for various wireless networks.
3Adaptability or versatility
If switchable ground connections are used to provide different frequency responses, then the frequency adaptability is improved, but the ability to independently tune resonances is limited
Solution Approach 1:
The antenna system is divided into multiple independently controllable elements with separate ground connections and feed points. This segmentation allows individual elements to be tuned and configured independently through their respective switching mechanisms. Each antenna element can be selectively activated or deactivated, and its ground connection can be independently switched, providing fine-grained control over the overall antenna resonance and frequency response.
Solution Approach 2:
The switchable ground connections provide dynamic control over the resonance of individual antenna elements. By selectively closing or opening ground switches for different elements, the system can independently tune which elements are active at any given time. This dynamic switching capability enables independent adjustment of resonant frequencies for different elements, allowing precise control over the overall frequency response without requiring physical reconfiguration.
4Adaptability or versatility
If conventional switching elements are used to re-configure antenna elements, then the resonant frequency shifts are achieved, but the frequency shift magnitude is small
Solution Approach 1:
The patent implements switching mechanisms that enable large frequency shifts by dramatically changing the electrical configuration of the antenna elements. The switchable ground connections allow elements to transition between being grounded and ungrounded states, creating substantial changes in resonant frequency. This dynamic reconfiguration produces frequency shifts that are significantly larger than conventional approaches, enabling the antenna to jump between widely separated frequency bands rather than making small incremental adjustments.
Solution Approach 2:
By segmenting the antenna into multiple elements with independent switching control, the system can selectively activate or deactivate specific elements to achieve large frequency shifts. When certain elements are switched off or grounded, the resonant frequency of the active elements changes dramatically. This segmented approach with independent switching enables frequency transitions that are much larger than what would be achievable with a single monolithic antenna structure.
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 allows for independent tuning of resonances and significant frequency band jumps, enabling efficient operation across multiple wireless networks within a compact volume, addressing the size and performance constraints of existing systems.
Implementation Method 1
a first antenna element resonates at a first set of frequencies, and the first and second antenna elements resonate together at a second set of frequencies
Data Source
AI summary
An antenna system comprising a first antenna element, a second antenna element, the first and second elements defining at least in part a slot element, an active switching network in communication with one or both of the first and second antenna elements, the switching network operable to cause the antenna system to resonate in each of two modes: a first mode wherein the first element resonates at a first set of frequencies, and the first element and a second element resonate together at a second set of frequencies; and a second mode wherein the first element resonates at the first set of frequencies, and the slot element resonates at a third set of frequencies.