Design Optimization of Two Input Multimode Applicator for Efficient Microwave Heating

Authors

  • Dharmendra Singh Rajpurohit Indian Institute of Technology Jodhpur, 342011
  • Rahul Chhibber Indian Institute of Technology Jodhpur, 342011

Keywords:

Applicator, multimode, cavity, waveguide

Abstract

This paper presents a novel design, modeling and optimization of two input multimode applicator at 2.45 GHz for efficient
microwave heating of materials. CST Microwave Studio 2012® commercial software is used to model a two input multimode applicator for coupling two low power sources to applicator chamber. Feeding microwave power at more than one location to a multimode applicator can result in improvement of field uniformity and the increase in heating power provided coupling is proper and polarization is chosen correctly. The model is simulated for different arrangements of waveguide ports and applicator is optimized to obtain low coupling between the input ports and uniform field distribution inside the applicator chamber. Minimum port to port coupling of -52 dB is achieved with two input ports arranged on adjacent face and in crosscurrent configuration. The electric field distribution in the empty cavity and cavity loaded with the wood sample is well uniform. Energy density and power loss density graphs show consistent microwave absorption inside the sample. Simulated results indicate that the microwave applicator design with this waveguide port arrangement is optimum for low port to port coupling and uniform microwave power absorption.

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Author Biographies

Dharmendra Singh Rajpurohit, Indian Institute of Technology Jodhpur, 342011

Dharmendra Singh Rajpurohit was born in Jodhpur, India in June 1976. He received B.E. degree in Electronics and Communication Engineering from Jai Narain Vyas University, Jodhpur, India, in 1999, and
M.Tech. degree in Electronics Engineering from Institute of Technology, Banaras Hindu University, Varanasi, India in 2002. From 2002 to 2009 he was Member (Research Staff) with Central Research Laboratory, Bharat Electronics Limited, Ghaziabad, India. Currently, he is Research Scholar with IIT
Jodhpur, India and his main research interests are microwave applicator design and optimization, microwave heating systems and microwave processing of materials.

Rahul Chhibber , Indian Institute of Technology Jodhpur, 342011

Rahul Chhibber was born in India in January 1979. He received B. Tech. degree in Production Engineering from Punjab Technical University, Jalandhar in 2001, and M.Tech. Degree in Industrial Metallurgy from IIT Roorkee, India, in 2003. In 2008 he received Ph.D. degree in Mechanical Engineering from IIT Roorkee, India. From 2008-2011 he was an assistant professor with Mechanical Engineering Department, Thapar University, Patiala, India. Currently, he is an Assistant Professor with Mechanical Engineering Department at IIT Jodhpur, India and his research area cover manufacturing and materials processing, mechanical
behaviour of materials and welding and joining. 

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Published

2020-10-26

How to Cite

Dharmendra Singh Rajpurohit, & Rahul Chhibber. (2020). Design Optimization of Two Input Multimode Applicator for Efficient Microwave Heating . International Journal of Advances in Microwave Technology, 1(3), 68-73. Retrieved from https://ijamt.com/index.php/ijamt/article/view/60