Antenna Feeding Network Holding Element for Impedance Stability

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Solution Overview

Problem

Multi-radiator antennas face challenges in maintaining impedance match and mechanical stability due to the need for openings in the outer conductors for connecting inner conductors, which can lead to reduced antenna performance and unwanted radiation.

Innovation Solution

The use of insulating holding elements with smaller openings or through holes for connecting means, allowing for insulated electrical connections without risking short circuits, and a holding element configured to position inner conductors for improved impedance matching and reduced part count.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If openings are made in the outer conductors for connecting inner conductors, then electrical connections can be established, but mechanical stability is reduced and unwanted radiation increases

Engineering Contradiction:

Improveease of connectionVSAvoidmechanical stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

A dielectric holding element is introduced as an intermediary component between the inner conductor and the outer conductor. This holding element provides a mounting structure for the inner conductor while electrically isolating it from the outer conductor, eliminating the need for direct openings in the outer conductor and thus maintaining mechanical stability while enabling electrical connections

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connection structure is segmented into separate functional components: the outer conductor maintains its integrity, the inner conductor is mounted on a separate dielectric holding element, and the connecting means are insulated within the holding element. This segmentation allows each component to fulfill its function without compromising the others

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If openings are made in the outer conductors for connecting inner conductors, then electrical connections can be established, but impedance matching is degraded

Engineering Contradiction:

Improveease of connectionVSAvoidimpedance matching

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The dielectric holding element acts as an intermediary that provides precise positioning and electrical isolation, enabling accurate impedance matching without the disruptions caused by direct openings in the outer conductor

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The dielectric material properties and the geometry of the holding element are optimized to maintain the characteristic impedance of the coaxial line. By carefully selecting the dielectric constant and the dimensions of the holding element, the impedance can be controlled and matched to the desired value

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If larger openings are made in the outer conductors, then design flexibility is improved, but antenna performance is degraded due to increased unwanted radiation

Engineering Contradiction:

Improvedesign flexibilityVSAvoidunwanted radiation

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The dielectric holding element serves as an intermediary that enables design flexibility in positioning and connecting inner conductors while simultaneously preventing unwanted radiation by providing electrical isolation and maintaining the integrity of the outer conductor

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The potential harm of needing openings for design flexibility is converted into a benefit by using the dielectric holding element, which enables flexible connections while actually reducing unwanted radiation compared to direct openings in the outer conductor

Inventive Principle:

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

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 solution enhances the mechanical stability and impedance matching of the antenna feeding network, reducing unwanted radiation and improving antenna performance by minimizing openings in the outer conductors while maintaining efficient connections.

Implementation Method 1

a holding element configured to hold the inner conductor in a desired position relative to the outer conductor. The holding element is made of an electrically insulating or dielectric material

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Data Source

PatentEP3350879B1Antenna feeding network comprising at least one holding element

Publication Date: 2022.07.20 CELLMAX TECH AB

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AI summary

An antenna feeding network (2) for a multi radiator antenna (1) is provided. The antenna feeding network comprises at least one coaxial line (20a, 20b). Each coaxial line comprises a central inner conductor (14a, 14b) and an elongated outer conductor (15a, 15b) surrounding the central inner conductor, wherein at least one of the outer conductors of the coaxial lines is provided with an opening (40), wherein the antenna feeding network further comprises at least one nonconductive holding element (8) configured to be placed in the opening. The holding element is configured to hold at least one of the inner conductors in position. The invention further relates to a multi radiator antenna (1) comprising such an antenna feeding network (2), and to a method for providing an electrical connection in such an antenna feeding network.