Analysis and design of a microwave absorber for wireless communication systems

A novel compact microwave absorber with a 10dB absorption level to operate in the wireless communication bands in 1.8 GHz – 2.1 GHz frequency range is investigated. A robust equivalent circuit (EC) model using a new non-resonance constituent parameter extraction technique based on the interpretation of the E- and H-field distribution is discussed. The EC model and the proposed topology is developed on a low cost FR-4 substrate of thickness 0.048λL (λL=wavelength at lower operating frequency) shows a good agreement between the analytical and full- wave simulated results to prove the robustness of the model. The unit-cell of the absorber has the high cost effective bandwidth (BWCE=81.14) which indicates the compactness of the absorber and thus makes it suitable for the wireless communication band application.