Design and Implementation of a Compact, Microstrip Coupler with Harmonics Suppression Using T-Shaped and Stepped-Impedance Resonators
Subject Areas : electrical and computer engineeringsonhan roshany 1 , Somayeh karimi 2 , Saeed Roshani 3 *
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Keywords: Coupler, size reduction, harmonic suppression, resonator,
Abstract :
In this paper a novel compact microstrip coupler using T-shaped and stepped impedance resonators is proposed, simulated and fabricated. In the proposed structure long quadrature wavelength lines are replaced with small resonators, which results in size reduction and harmonics suppression. The proposed coupler correctly works at 1 GHz and suppresses 2nd up to 7th unwanted harmonics. Moreover the designed coupler reduces the circuit size more than 65% compared to the conventional coupler.
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