Stacked Mobile Radio Antenna With Capacitive Base Coupling

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Solution Overview

Problem

Existing antenna arrangements for mobile radio systems are complex to manufacture and require precise electrical connections, which can be difficult to reproduce and may change over time, affecting electrical characteristics.

Innovation Solution

The proposed antenna arrangement simplifies the manufacturing process by using a capacitively coupled design with an antenna holder made of non-conductive material, allowing for adjustable capacitive coupling through a receiving space that can be filled with different materials or inlays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electrical contact between metal surfaces is used to connect antenna to reflector, then electrical connection is established, but manufacturing precision is difficult to reproduce and electrical characteristics may change over time

Engineering Contradiction:

Improveelectrical characteristics stabilityVSAvoidelectrical connection reproduction

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical electrical contact system (metal-to-metal connection) with a capacitive coupling system using a dielectric pedestal. The antenna body is capacitively coupled to the reflector through the non-conductive pedestal arrangement, eliminating the need for precise mechanical electrical contacts while maintaining reliable electrical connection through capacitance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a dielectric pedestal arrangement as an intermediary between the antenna body and the reflector. This non-conductive pedestal serves as a mediator that provides both mechanical support and capacitive coupling, replacing the direct metal-to-metal electrical contact while ensuring stable electrical characteristics over time.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If complex electrical connections are used to ensure reliable electrical characteristics, then connection stability is improved, but device complexity increases

Engineering Contradiction:

Improveelectrical connection stabilityVSAvoidconnection structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical electrical connection structures with a simple capacitive coupling system. The dielectric pedestal provides both mechanical support and electrical coupling through capacitance, eliminating the need for complex wiring, connectors, and contact mechanisms while maintaining connection stability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If fixed antenna design is used, then manufacturing is simplified, but adaptability for different applications is reduced

Engineering Contradiction:

Improveantenna productionVSAvoidapplication flexibility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces adjustability into the antenna system by allowing the dielectric pedestal dimensions and receiving space characteristics to be modified. This enables the capacitive coupling to be tuned for different applications while maintaining the same basic antenna structure, achieving both manufacturing simplicity and application versatility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent enables adaptability by allowing changes in the physical parameters of the dielectric pedestal (dimensions, material properties) and the receiving space (spacing, geometry). These parameter changes allow the same antenna design to be adapted for different capacitive coupling requirements without redesigning the entire antenna structure.

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

This design enables a simpler and more reproducible manufacturing process while allowing for adjustable capacitive coupling, which can be tailored for different applications without changing the antenna arrangement itself.

Implementation Method 1

The antenna body only rests with that supporting part on the base portion of the antenna holder so that a receiving space is formed between another part of the underside of the antenna body and the base portion. Therefore, the another part of the underside of the antenna body is capacitively coupled to the base plate via the receiving space.

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Data Source

PatentUS12294142B2Antenna arrangement for mobile radio systems, a stacked antenna system and a mobile radio antenna comprising the antenna arrangement and the stacked antenna system

Publication Date: 2025.05.06 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

An antenna arrangement comprises an antenna which has an antenna body and a radiator arrangement. An antenna holder comprises a base portion. An upper side of the antenna holder points to-wards an underside of the antenna body and an underside of the antenna holder points towards an electrically conductive base plate. Only a supporting part of the underside of the antenna body rests on the base portion, so that a receiving space is formed be-tween another part of the underside of the antenna body and the base portion. The base portion of the antenna holder is electrically non-conductive, whereby the another part of the underside of the antenna body is capacitively coupled to the base plate via the receiving space.