Integrated Dielectric Resonator Antenna Filter

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Solution Overview

Problem

Existing antenna elements face challenges in implementing signal filtering functions with high Q-factor and low loss, as traditional filters are designed isolated, leading to increased insertion loss and reduced bandwidth, and are costly due to the need for separate components that are difficult to integrate with antenna arrays.

Innovation Solution

A plug-in antenna device with integrated filters, where dielectric elements are arranged in series and electromagnetically coupled within a waveguide section, allowing for low insertion loss and simplified assembly, and can be produced as a single piece of plastic for reduced manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If traditional separate filters are used with antenna elements, then filtering function is provided, but insertion loss increases and bandwidth reduces

Engineering Contradiction:

Improveinsertion lossVSAvoidfilter structure

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent combines the antenna element and filter into a single integrated structure where the antenna element itself serves as the filter resonator. The dielectric resonator element performs both antenna radiation and frequency selection functions, eliminating the need for separate filter components and reducing insertion loss while maintaining filtering performance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The antenna element is designed to perform multiple functions simultaneously: it acts as both the radiating element and the filtering resonator. The dielectric resonator provides both antenna functionality and band-pass filtering, reducing overall system complexity and energy loss.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of energy

If traditional separate filters are used with antenna elements, then filtering function is provided, but manufacturing cost increases

Engineering Contradiction:

Improveinsertion lossVSAvoidmanufacturing cost

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The antenna element and filter are merged into a single component that can be manufactured as one piece using plastic molding techniques. This integration eliminates the need for separate filter components and complex assembly processes, significantly reducing manufacturing cost while maintaining low insertion loss performance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses plastic molding to manufacture the dielectric resonator antenna element, changing the manufacturing method from traditional multi-component assembly to single-piece molding. This parameter change in manufacturing process reduces cost and improves ease of production while maintaining the low insertion loss characteristic.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If separate filters are integrated with antenna elements, then filtering function is provided, but assembly complexity increases

Engineering Contradiction:

Improvefiltering performanceVSAvoidassembly process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The filter and antenna element are merged into a single integrated component, eliminating the need for separate assembly steps. The dielectric resonator element is manufactured as one piece that incorporates both antenna and filtering functions, simplifying assembly while ensuring reliable filtering performance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent changes the assembly parameter from multi-component assembly to single-piece installation. The plastic molded dielectric resonator antenna element is inserted as one component, reducing assembly complexity while maintaining reliable filtering performance through the integrated design.

Inventive Principle:

Principle #35Parameter changes

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 solution provides a low-cost, reliable, and efficient filtering mechanism with reduced insertion loss and improved Q-factors, enabling the production of phased array antennas with uncomplicated assembly and high manufacturing repeatability.

Implementation Method 1

the dielectric elements are arranged electromagnetically coupled, whereby a radio frequency signal comprised in a radio frequency band passing to or from the antenna element via the other dielectric elements is arranged to be electromagnetically filtered

Methodology Applied

Scientific EffectElectromagnetic coupling: Electromagnetic Induction

Implementation Method 2

The filter and antenna is combined and co-designed, such that at least one of the resonances of the antenna is used as a resonator in the filter

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS11575207B2Plug-in antenna device with integrated filter

Publication Date: 2023.02.07 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present disclosure relates to a plug-in antenna device arranged to be received in a waveguide section. The plug-in antenna device includes one or more dielectric elements arranged in series and spaced apart by connecting members, a top-most dielectric element being arranged as antenna element. When the plug-in antenna device is received in the waveguide section, the dielectric elements are arranged electromagnetically coupled, whereby a radio frequency signal included in a radio frequency band passing to or from the antenna element via the dielectric elements is arranged to be electromagnetically filtered.