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Abstract
A novel compact microwave absorber with 10 dB absorption level in 1.8–2.1 GHz frequency band for the wireless communication applications is investigated. A robust equivalent circuit (EC) model of the structure is developed and rigorously analysed using a non-resonance constituent parameter extraction technique. The EC model and the proposed topology developed on a low-cost FR-4 substrate of thickness 0.048λ L (λ L = wavelength at lower operating frequency) have been analysed for different polarisations and are in close agreement with each other. The structure has also been experimentally verified and good agreement among analytical model, full wave simulation, and the experimental results is observed. The absorber shows the high cost-effective bandwidth (BWCE = 81.14) in comparison to many recently reported works which proves its compactness and novelty.
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