In this paper a novel branch line coupler (BLC) with size reduction and performance improvement at 2.4 GHz is proposed. The proposed branch line coupler suppresses the second harmonic with 38.55 dB attenuation level. The scattering parameters of the proposed BLC are giv More
In this paper a novel branch line coupler (BLC) with size reduction and performance improvement at 2.4 GHz is proposed. The proposed branch line coupler suppresses the second harmonic with 38.55 dB attenuation level. The scattering parameters of the proposed BLC are given as follows: S11= -67.67 dB, S12= -2.95 dB, S13= -3.09 dB and S14= -49.78 dB. The bended line structures and open-ended stubs are used in design process. The proposed BLC has 45.4% size reduction compare to the conventional one. The proposed device fabricated on RT/Duroid 5880 substrate.
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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 ha More
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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