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A new resonator using active device and defected ground structure with islands (DGSI) is proposed. The active device is used for supplying the negative resistance which is one of key factors of the proposed active resonator. The negative resistance is realized by the series active device. The electrical characteristics of the proposed resonator with DGSI are improved by combining the negative resistance...
An unequal Wilkinson power divider having rectangular-shaped defected ground structure (DGS) is proposed. DGS microstrip line adopted for the divider is composed of double-layer substrate which removes the ground problem of the previous DGS structures in packaging. The first layer includes DGS on the bottom ground plane. The second substrate of which top metal plane has been removed is attached to...
In this paper, a new design technique called the direct frequency conversion method is proposed, for wideband pass filters, which can be applied to the UWB (Ultra Wide Band) system. Using the proposed method, a wide band-pass filter is designed as an equivalent circuit, composed of parallel and serial L-C resonators. In the equivalent circuit, a microstrip line and a suspended stripline (SS) are adopted...
A novel frequency tripler using a composite right/left-handed transmission line is proposed. The left-handed transmission line (LH TL) in the proposed frequency tripler suppresses the fundamental component (f0), while the composite right/left-handed transmission line (CRLH TL) ?/4 open stub diminishes unwanted harmonics. Due to the combination of the LH TL and CRLH TL ?/4 open stub, the only desirable...
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