A Study And Development Of Low Cost Microwave Absorber

Mohd Azizi , Ali Saberi (2009) A Study And Development Of Low Cost Microwave Absorber. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

In modern times, telecommunication typically involves the use of electronic transmitters such as the telephone, television, radio or computer. Nowadays communication system becomes more sophisticated that involved high frequency to deliver information. Hence a lot of tool was invented to perform the task. Then the equipment has to test before widely used. The test must be done perfectly without interference from the external wave or reflected wave from surrounding objects. Therefore the wave absorber invented to overcome this problem. But nowadays, all the chambers for high frequency measurement have use expensive base and material as well like ferrite or semi conductor elements and it is high in cost. This microwave absorber based on low cost material to overcome the problem in term of money matter. The absorber will absorb the electromagnetic wave energy to produce the null reflectivity environment for interior and free wave from exterior. The purpose of the testing that done in the chamber is to obstruct the external source from the environment and to avoid the measurement is influence by uncorrelated noise such as heat or rain. The testing can be perform in the field or open space but the result taken not as better as testing result in anechoic chamber. In this project the absorber shape used is pyramidal shape. This is because of the total surfaces on the shape is high instead of other shape. The low cost materials that get used in this project are activated carbon powder and water based paint. The absorber that fabricated by using that the material respectively will be undergoes the test. From the result obtained, observation will be made on how the material will give good absorption.

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