Microwave Cavity Antenna Layout for More Uniform Food Heating
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Solution Overview
Problem
Cooking apparatuses using microwaves often result in non-uniform heating due to surface variations and temperature differences in food, leading to inefficiencies in cooking processes.
Innovation Solution
A cooking apparatus with a metal part extended parallel to the cavity to transmit microwaves, allowing for improved microwave distribution and impedance matching, enabling the output of wideband microwaves for uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional microwave transmission is used, then the cooking apparatus can heat food, but the food is not uniformly heated due to surface variation and partial temperature difference
Solution Approach 1:
The antenna is divided into multiple segments (first metal part and second metal part) with different orientations. The first metal part extends in one direction while the second metal part extends in another direction, allowing microwaves to be transmitted from multiple directions simultaneously, thereby achieving more uniform heating across the food surface.
Solution Approach 2:
Different parts of the antenna structure are designed with different orientations and configurations to target specific regions of the cavity. The first metal part and second metal part are positioned and oriented to create localized microwave fields that collectively cover the entire food area, addressing temperature variations in different zones.
2Productivity
If a traditional antenna structure is used, then the device is simple, but the microwave transmission efficiency is limited and wideband output is difficult to achieve
Solution Approach 1:
The first metal part and second metal part are merged into a single integrated antenna structure that functions as a unified microwave transmission system. This combined structure achieves wideband microwave output and improved transmission efficiency without requiring multiple separate antenna components, thus maintaining relative structural simplicity while enhancing performance.
Solution Approach 2:
The antenna structure serves multiple functions: it transmits microwaves efficiently across a wide frequency band, provides uniform coverage throughout the cavity, and maintains impedance matching. The first and second metal parts work together to achieve these multiple objectives simultaneously, making the antenna a multi-functional component.
3Reliability
If microwaves are transmitted without optimized antenna structure, then the device complexity is low, but impedance matching is difficult to achieve
Solution Approach 1:
The antenna structure is designed to dynamically adapt to different operating conditions and frequencies. The first metal part and second metal part are configured to maintain effective impedance matching across a wide frequency range, allowing the system to reliably transmit microwaves under varying operational parameters without requiring complex external matching circuits.
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 solution enhances the efficiency of microwave cooking by ensuring uniform heating of food through the use of a metal antenna structure that facilitates wideband microwave transmission and selective output based on calculated efficiencies, addressing the issue of non-uniform heating.
Implementation Method 1
a microwave transmission line to transmit microwaves to the inside of the cavity
Implementation Method 2
the food is not uniformly heated due to surface variation of the food and a partial temperature difference of the food may occur
Implementation Method 3
a first metal part connected to one end of the microwave transmission line and extended in one direction so as to be parallel with the plate
Data Source
AI summary
Provided herein is a cooking apparatus. The cooking apparatus includes a plate forming a cavity, a microwave transmission line to transmit microwaves to the inside of the cavity, and a first metal part connected to one end of the microwave transmission line and extended in one direction so as to be parallel with the plate. Thereby, an antenna having improved efficiency is provided.