Abstract:In this paper, a microstrip lowpass filter with-3 dB cutoff frequency of 2.1 GHz consisting of three cascaded resonators with different semicircle patches and four suppressors employing radial stubs has been proposed. To indicate the role of each employed microstrip transmission line in the structure of its resonance cell, the equations of the transfer function and transition zero of the resonator have been calculated, separately. The designed filter has been constructed and tested, and a good agreement betwee… Show more
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