Measurement and mitigation of magnetic field of a microwave oven

The presence of magnetic field is observed around when there is a current flow. With the increase usage of electronic products in our daily lives, it is essential to understand the characteristics of the magnetic field. This paper presents the measurement of the magnetic field with and without shield in the vicinity of a certain microwave oven. Certain positions on the microwave oven show high magnetic field value especially around the Start/Stop button. Relationship between magnetic field value and distance from the microwave oven is also determined. By employing different types of easily available and cheap shielding, results highlight its benefit in reducing the magnetic field value around the oven. In general, the magnetic fields are reduced to 30% and 50% by using single and double paper shields respectively. In addition, plastic shields are also used to reduce the magnetic field.

[1]  R. M. Jha,et al.  RF leakage radiation from microwave oven for aircraft interior applications , 2012, Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation.

[2]  Liu Chen,et al.  Measurement and calculation of the radiation characteristics of microwave ovens , 2003, 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03..

[3]  Alain Azoulay,et al.  Study of RF emissions of various electronic devices used by the public , 2011, 2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011).

[4]  M. Y. Sanavullah,et al.  Theoretical and experimental study of cooking regions for shell eggs in a domestic Microwave oven , 2011, 2011 3rd International Conference on Electronics Computer Technology.

[5]  Mohammad Zarar Mohamed Jenu,et al.  Measurements and reduction of microwave oven electromagnetic leakage , 2011 .

[6]  Linxin Zheng,et al.  Analysis on a microwave oven based on user operation , 2008, 2008 9th International Conference on Computer-Aided Industrial Design and Conceptual Design.

[7]  Wen Yinghong,et al.  Radiation characteristics of microwave ovens , 2002, 2002 3rd International Symposium on Electromagnetic Compatibility.

[8]  Richard Tell.  Field-Strength Measurements of Microwave-Oven Leakage at 915 MHz , 1978, IEEE Transactions on Electromagnetic Compatibility.