Module Substrate Antenna With Alternating Ferrite Coils

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Solution Overview

Problem

The existing module substrates with IC chips face difficulties in adjusting the frequency of the antenna coil after being connected to an external circuit, leading to increased inductance fluctuations, which requires an additional capacitor for frequency adjustment.

Innovation Solution

A module substrate with a laminate of stacked ferrite layers, alternately positioned antenna coils, and a lead wire connecting to a connection pad, allowing for easy frequency adjustment before connecting to an external circuit, eliminating the need for a capacitor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a module substrate with antenna wiring is connected to an external circuit after mounting IC chips, then the antenna can function for wireless communication, but the inductance of the antenna coil fluctuates and frequency adjustment becomes difficult

Engineering Contradiction:

Improvewireless communication functionVSAvoidfrequency adjustment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by providing a capacitor before the module substrate is connected to the external circuit, allowing frequency adjustment to be performed in advance during the assembly process rather than after connection. This preliminary frequency adjustment eliminates the need for post-connection tuning and maintains reliable wireless communication functionality.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If a capacitor is provided independently on the surface for frequency adjustment after IC chip mounting, then the frequency can be tuned, but the device complexity increases and adjustment becomes more difficult

Engineering Contradiction:

Improvefrequency tuning capabilityVSAvoidadditional capacitor and adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the frequency adjustment function with the existing antenna coil structure by integrating the capacitor into the module substrate assembly process. Instead of adding an independent external adjustment mechanism, the capacitor is incorporated during manufacturing, combining the tuning function with the antenna structure and reducing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The frequency adjustment capacitor is provided and configured during the preliminary assembly stage before the module substrate is connected to external circuits. This allows frequency tuning to be completed as part of the manufacturing process, eliminating the need for complex post-assembly adjustment mechanisms and reducing overall device complexity.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If frequency adjustment is performed after connecting to external circuit, then the antenna can be tuned to required frequency, but the process becomes more complex and time-consuming

Engineering Contradiction:

Improvefrequency adjustment capabilityVSAvoidfrequency adjustment time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent performs frequency adjustment as a preliminary action during the assembly process, before the module substrate is connected to external circuits. By configuring the capacitor and adjusting the frequency in advance during manufacturing, the time required for frequency adjustment is eliminated from the operational phase, reducing overall time loss and streamlining the deployment process.

Inventive Principle:

Principle #10Preliminary action

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 configuration reduces inductance fluctuations, enabling easy frequency adjustment of the antenna coil before IC chip mounting, allowing for direct connection to an external circuit without requiring a frequency-adjusting capacitor.

Implementation Method 1

a laminate in which a plurality of ferrite layers are stacked

Methodology Applied

Scientific EffectFerromagnetism: Ferromagnetism

Implementation Method 2

antenna coils provided on surfaces of the respective ferrite layers

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS11551851B2Module substrate antenna, and module substrate mounting the same

Publication Date: 2023.01.10 SECURITAG ASSEMBLY GROUP

AI summary

A module substrate antenna includes: a laminate in which a plurality of ferrite layers are stacked; antennal coils provided on surfaces of the respective ferrite layers; a connection pad connected to an external circuit; and a lead wire provided between the laminate and the connection pad. In the laminate, the antenna coils are two types of the antenna coils, and the two types of the antenna coils are alternately stacked.