Design of a microstrip metamaterial for C-band Radar absorber

Abstract

Electromagnetic wave absorber has an important role in radar technology used for military as well as for civilian application. There are many electromagnetic wave absorbing technologies used in current radar technology, one of which is an absorber based on metamaterial. In this paper, design of a microstrip metamaterial for C-band radar absorber will be discussed. The metamaterialabsorbers on theC-bandrange is designed on microstrip material having a thickness 4.8 mm and dielectric constant 2.17. There are several techniques can be implemented to broad the working frequency, which are increasing substrate thickness, decreasing dielectric constant and patch modification. In this work, the simulation method is employed for optimizing the design and achieving good electromagnetic wave absorption at the C-band working frequency. Simulated result show the microstrip metamaterial design has broadband absorption lower than -10 dB ranging from 4.3 GHz to 7.1 GHz. Based on the characteristics, this design can be realized as radar absorber at C-band frequency.