volume | PIER Journals

Abstract

In this paper, a dual-band Substrate Integrated Waveguide (SIW) resonator with Sierpinski fractal geometry is proposed. The space-filling property of the employed fractal shape allows to reduce the resonator size. The bandwidth, the minimum insertion loss, the maximum return loss and the stop band rejection are considered for evaluating the effect of the fractal geometry on the resonator characteristics. An accurate electromagnetic investigation is made using a full wave finite element method solver (Ansoft HFSS). Simulated and measured results are in good agreement. The second iteration fractal resonator exhibits two simulated bands centered at the frequencies f₁=11.57 GHz and f₂=25.7 GHz, while the measured frequencies are f₁=11.33 GHz, f₂=23.67 GHz. The measured bandwidths are BW=1.15 GHz and BW=2 GHz and the minimum insertion losses are close to -1.36 dB and -1.97 dB, respectively. The prototypes of the square resonator without, with first and with second iteration fractal geometry are fabricated via standard printed circuit board process (PCB). A Rogers Duroid 5880 substrate with thickness t=0.381 mm is employed.

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Dr. Michele A. Chiapperino

Dr. Onofrio Losito

Dr. Tiziana Castellano

Dr. Giuseppe Venanzoni

Prof. Luciano Mescia

Dr. Giacomo Angeloni

Dr. Chiara Renghini

Dr. Pasquale Carta

Dr. Onofrio Losito

Prof. Francesco Prudenzano