Title :
A Circuit Analog Absorber With Optimum Thickness and Response in X-Band
Author :
Sohrab, A.P. ; Atlasbaf, Zahra
Author_Institution :
Fac. of Electr. & Comput. Eng., Tarbiat Modares Univ. (TMU), Tehran, Iran
Abstract :
A wideband circuit analog absorber in X-band is proposed. The design is discussed by the unit cell and equivalent circuit model. A unit cell of the periodic structure for the absorber is designed and simulated. The absorber consists of two RO 4003 layers separated by air distance. With the thickness of 3 mm, the absorber offers a -20-dB bandwidth of 40%. A novel method for estimating the optimality ratio of planar absorbers is also proposed. The optimality ratio of the designed X-band absorber is calculated with the proposed method, and the result is about 80% optimality in frequency response and total thickness.
Keywords :
analogue circuits; equivalent circuits; frequency response; microwave circuits; RO 4003 layers; X-band absorber; air distance; equivalent circuit model; frequency response; planar absorber optimality ratio estimation; size 3 mm; unit cell; wideband circuit analog absorber; Antennas and propagation; Bandwidth; Capacitance; Equivalent circuits; RLC circuits; Reflection coefficient; Resistors; Bandwidth; circuit analog absorber (CAA); mutual coupling; optimality ratio; optimum thickness;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2248073
