Open Loop Antenna With Self-Coupling Element for Detuning Immunity

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Solution Overview

Problem

There is a need for antennas that are compatible with both GPS and GLONASS platforms to provide robust and selectable satellite-based location services, especially as GLONASS begins worldwide operation and consumer devices are being developed to utilize this platform.

Innovation Solution

An open loop antenna design with a resonant mechanism excited at 1.575 GHz and 1.610 GHz frequencies, featuring a low profile and immunity to detuning from nearby metal parts, allowing stable radiation performance across a wide bandwidth and resistance to coupling with other elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional antenna design is used, then the antenna can be simple in structure, but it becomes highly de-tuned when metal parts are nearby

Engineering Contradiction:

Improvefrequency stabilityVSAvoiddetuning by metal parts

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies the 'Blessing in disguise' principle by using a self-coupling element that intentionally introduces a controlled coupling effect to counterbalance the harmful detuning caused by nearby metal parts. The self-coupling element is designed to provide a compensating reactance that offsets the detuning effect, thereby converting the harmful interaction with metal parts into a beneficial frequency stabilization mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent employs the 'Parameter changes' principle by adjusting the electrical parameters of the antenna system through the self-coupling element. The element is designed with specific dimensions and positioning that allow it to modify the overall impedance and resonant frequency of the antenna system, enabling the antenna to maintain its operating frequency despite the presence of metal parts.

Inventive Principle:

Principle #35Parameter changes

2Volume of moving object

If the antenna is made with low profile, then it saves space in devices, but it becomes more sensitive to detuning effects

Engineering Contradiction:

Improveantenna thicknessVSAvoidimmunity to detuning

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The self-coupling element converts the harmful detuning effect into a beneficial frequency stabilization mechanism. By intentionally introducing a controlled coupling effect, the antenna system compensates for the reduced immunity to detuning that results from the low-profile design, thereby maintaining frequency stability despite the compact thickness.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent uses a composite structure combining the radiating element, ground plane, and self-coupling element to achieve both low profile and detuning immunity. The interaction between these different components creates a composite antenna system where the self-coupling element specifically addresses the detuning vulnerability introduced by the compact low-profile geometry.

Inventive Principle:

Principle #40Composite materials

3Adaptability or versatility

If the antenna supports both GPS and GLONASS platforms, then it provides versatile location services, but it requires wider bandwidth operation

Engineering Contradiction:

Improveplatform compatibilityVSAvoidbandwidth requirements

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the 'Universality' principle by designing a single antenna system that can operate with both GPS and GLONASS satellite navigation platforms. The antenna is configured to support multiple frequency bands and operating modes, allowing it to provide versatile location services for different satellite systems without requiring separate dedicated antennas for each platform.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 antenna maintains consistent frequency and performance despite proximity to metal components, offering enhanced isolation and adaptability for use in various device configurations, ensuring reliable satellite-based location services.

Implementation Method 1

The resonant mechanism is excited by an open loop structure at 1.575 GHz and 1.610 GHz, forcing the current distribution to remain at that particular portion of the antenna resulting as the primary resonator.

Methodology Applied

Scientific EffectResonance: Resonance

Implementation Method 2

the electromagnetic fields of the antenna resist coupling with nearby positioned elements, since the fields are kept at the open loop structure

Methodology Applied

Scientific EffectElectromagnetic field confinement: Electromagnetic Induction

Data Source

PatentUS9379431B2Electromagnetic open loop antenna with self-coupling element

Publication Date: 2016.06.28 TAOGLAS GROUP HLDG LTD

AI summary

An antenna is provided for the new combined GPS and GLONASS technologies in single port for tracking and navigation applications in wireless devices. The resonant mechanism is excited by an open loop structure at 1.575 GHz and 1.610 GHz, forcing the current distribution to remain at that particular portion of the antenna resulting as the primary resonator.