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In this paper, the concept and formulation of short-open calibration (SOC) and short-open-load (SOL) techniques are presented. This technique was initially proposed in 2.5D MoM and it is extended in integration with commercial software to analyze many kinds of periodic guided-wave structures. By calibrating out the error boxes, the guided-wave characteristics of these periodic structures, e.g., microstrip-line/CPW...
A coplanar waveguide fed wideband dipole antenna using a multiple-mode resonator is proposed and developed. A simple dipole antenna structure is investigated for its wideband radiation performance by virtue of its single, double, triple and quadruplet resonant modes. Later, a metallic reflector is properly installed in order to provide a unidirectional radiation pattern as demanded for the long-term...
A high-selectivity dual-band bandpass filter using a modified triple-mode resonator with two paralleled stubs is proposed. By adding a coplanar waveguide (CPW) structure into a microstrip dual-mode stepped-impedance resonator (SIR), the triple-mode resonator is achieved without significantly increasing the overall circuit size. Five transmission zeros are generated in the desired band so as to improve...
A novel ultra-wideband (UWB) microstrip-to-CPS (coplanar stripline) transition has been developed. This transition or balun structure has several attractive advantages such as good impedance transformation, compact size and wide bandwidth. After the parallel-coupled line section between the microstrip line and CPS is investigated under varied traversal dimensions, a wide transmitting band is well...
This paper aims to give unified characterization of coplanar-waveguide-based 1D electromagnetic-bandgap (EBG) and metamaterial in terms of two fundamental per-unit-length (PUL) transmission parameters, i.e., characteristic impedance and propagation constant. In analysis, a full-wave self-calibrated method of moments (MoM) is applied to de-embedding these two PUL parameters from simulation of two-port...
This paper aims to give a unified characterization of various periodically loaded transmission line media/materials with infinite extent on coplanar waveguide (CPW) in terms of two fundamental per-unit-length (PUL) transmission parameters, i.e., frequency-dispersive/complex characteristic impedance and propagation constant. Regardless of varied periodic loading elements, a self-calibrated method of...
This paper presents a novel class of ultra-wideband (UWB: 3.1~10.6 GHz) bandpass filters formed on coplanar waveguide. Open-/short-circuited multiple-mode resonators (MMR) are constructed with three distinctive sections and their resonant performances are studied towards allocating the first three resonant modes occurring around the lower-end, center and higher-end of the concerned UWB passband. In...
A novel class of ultra-wideband (UWB) bandpass filters are reportedly constructed using the hybrid microstrip and coplanar waveguide (CPW) structure. Two types of multiple-mode resonators (MMRs) on CPW are configured to allocate their first three resonant frequencies at about the lower end, center and higher end of the UWB band. Then, a microstrip/CPW back-to-back coupling structure with enhanced...
Transmission line metamaterials on CPW with unsymmetrical unit cells, loaded by series- C and shunt-L elements, are studied to demonstrate the distinctive characteristics of incident and reflected guided-waves. Two sets of per-unit-length transmission parameters, i.e., propagation constant and Bloch-wave impedance, are numerically extracted using our self-calibrated method of moments and they are...
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