Multi-Substrate Antenna Module for Low-Height Directional Radiation

Solution Overview

Problem

Existing antenna modules face challenges in reducing size and height while maintaining mechanical strength and ensuring efficient radio wave radiation in multiple directions, particularly when using bent dielectric substrates.

Innovation Solution

The antenna module design incorporates a first substrate with a recessed part where a second substrate with a different radiation direction is fitted, eliminating the need for a bent part and allowing for a reduction in height while maintaining mechanical strength, using a configuration where the two substrates are fixed without a bent part.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a bent dielectric substrate is used to achieve different radiation directions, then the antenna module can radiate in multiple directions, but the height and mechanical strength are compromised

Engineering Contradiction:

Improveradiation directionVSAvoidheight

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The antenna module is divided into multiple separate substrates (first substrate with first radiating element, second substrate with second radiating element) instead of using a single bent substrate. Each substrate maintains its own planar structure with standard thickness, eliminating the need for bending while achieving multi-directional radiation through spatial arrangement of separate elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The solution transitions from a two-dimensional bent surface to a three-dimensional stacked configuration. Multiple planar substrates are arranged in different spatial orientations (e.g., one substrate horizontal, another vertical or at an angle), allowing radiating elements to emit in different directions without requiring any single substrate to bend, thus maintaining standard thickness and improving mechanical strength.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If a bent dielectric substrate is used to achieve different radiation directions, then the antenna module can radiate in multiple directions, but the mechanical strength is compromised

Engineering Contradiction:

Improveradiation directionVSAvoidmechanical strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The antenna module is divided into multiple separate substrates (first substrate with first radiating element, second substrate with second radiating element) instead of using a single bent substrate. Each substrate maintains its own planar structure with standard thickness, eliminating the need for bending while achieving multi-directional radiation through spatial arrangement of separate elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each substrate in the multi-substrate configuration maintains uniform material properties and standard thickness throughout, avoiding the structural weaknesses and non-uniform stress distribution inherent in bent substrates. This homogeneous construction of individual substrates ensures consistent mechanical strength while achieving multi-directional radiation through their collective spatial arrangement.

Inventive Principle:

Principle #33Homogeneity

3Volume of moving object

If the antenna module size and thickness are reduced, then the device becomes more compact, but the mechanical strength and power supply capability are compromised

Engineering Contradiction:

Improveantenna module volumeVSAvoidmechanical strength

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The antenna module is divided into multiple separate substrates (first substrate with first radiating element, second substrate with second radiating element) instead of using a single bent substrate. Each substrate maintains its own planar structure with standard thickness, eliminating the need for bending while achieving multi-directional radiation through spatial arrangement of separate elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The antenna module employs a composite structure combining multiple substrates with different orientations and radiating elements. This composite configuration achieves compact volume through vertical stacking while maintaining mechanical strength through the collective support of multiple standard-thickness substrates, avoiding the weakness of single bent or thinned substrates.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12620714B2Antenna module

Publication Date: 2026.05.05 MURATA MFG CO LTD

AI summary

An antenna module includes a first dielectric substrate at which a first radiating electrode with a flat plate shape is disposed and a second dielectric substrate at which a second radiating electrode shape is disposed. The first dielectric substrate has a first surface and a second surface that are opposite each other. The first radiating electrode is disposed on the second surface of the first dielectric substrate or at a position between the first and second surfaces of the first dielectric substrate. The second dielectric substrate includes a region that is arranged so as abut the first dielectric substrate and a region that is in contact with the first surface of the dielectric substrate. A normal direction of the radiating electrode is different from a normal direction of the radiating electrode.