Radio Wave Radiation Device With Direct Gate-Voltage Shutdown

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing radio wave radiation devices, such as microwave ovens, take too long to stop emitting radio waves after the door is opened during operation.

Innovation Solution

A radio wave radiation device equipped with a signal generator, signal amplifier, radio wave radiator, controller, open/close detector, and gate voltage control circuit that quickly stops radio wave radiation by controlling the gate voltage of transistors in the signal amplifier when the door is opened, utilizing gate voltage control circuits and bias voltage control circuits to ensure rapid shutdown.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the controller stops the high-frequency oscillator circuit upon door opening detection, then radio wave radiation is stopped, but there is a time delay between door opening and radiation stop

Engineering Contradiction:

ImprovesafetyVSAvoidtime delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The gate voltage control circuit is pre-configured to immediately control the gate voltage of the transistor when the open/close detector signals door opening, enabling the amplifier to stop amplifying the high-frequency signal without waiting for the controller's processing cycle. This preliminary setup of the control path eliminates the time delay between detection and action.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A gate voltage control circuit is introduced as an intermediary component between the open/close detector and the amplifier. This intermediary circuit directly controls the transistor's gate voltage to immediately stop signal amplification when the door opens, bypassing the slower controller processing path and achieving rapid radiation cessation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the controller stops the high-frequency oscillator circuit, then radio wave radiation is stopped, but the response time is not sufficiently fast

Engineering Contradiction:

Improveradio wave exposure riskVSAvoidshutdown speed

Core Design Contradiction:

Object-affected harmful factorsVSSpeed

Solution Approach 1:

The patent replaces the conventional controller-based stop mechanism with a direct electronic control mechanism. The gate voltage control circuit uses electronic signals to immediately adjust the transistor's gate voltage, substituting the slower mechanical/controller-based stop sequence with a faster electronic control approach that achieves immediate shutdown.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the control parameter from stopping the high-frequency oscillator to controlling the gate voltage of the transistor in the amplifier. By adjusting the gate voltage parameter, the amplifier's signal amplification is immediately halted, providing a faster response than stopping the oscillator circuit alone.

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 device can promptly stop radio wave radiation upon door opening, enhancing safety and reducing the risk of accidental exposure by minimizing the time delay in shutting down the radiation process.

Implementation Method 1

The signal amplifier includes at least one amplifier including a transistor and amplifies the high-frequency signal

Methodology Applied

Scientific EffectField Effect Transistor Amplification:

Implementation Method 2

the gate voltage control circuit controls a gate voltage of the transistor included in the at least one amplifier of the signal amplifier to stop radio wave radiation

Methodology Applied

Scientific EffectGate Voltage Control:

Data Source

PatentUS20250324493A1Radio wave radiation device

Publication Date: 2025.10.16 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A radio wave radiation device includes a cavity, a signal generator, a signal amplifier, a radio wave radiator, a controller, an open/close detector, and a gate voltage control circuit. The cavity includes a door and accommodates an object. The signal generator generates a high-frequency signal. The signal amplifier includes at least one amplifier including a transistor and amplifies the high-frequency signal. The radio wave radiator radiates, to the object, a radio wave corresponding to the high-frequency signal amplified by the signal amplifier. The controller controls the signal generator and the signal amplifier. The open/close detector detects the open and closed states of the door and provides notification of the open and closed states. When notified of the open state of the door by the open/close detector, the gate voltage control circuit controls the gate voltage of the transistor included in the at least one amplifier of the signal amplifier to stop radio wave radiation.