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A new bandpass filter (BPF) with a good frequency selectivity using lumped resistor-loaded element is proposed. The filter is composed of a parallel-coupled line shunted with a folded open-ended stub and a coupled line loaded with lumped resistor. The proposed filter has been designed, simulated, optimized for wireless communication system, and the obtained frequency responses have demonstrated a...
A new and miniaturized narrow bandpass filter (BPF) with very wide upper stopband is proposed. The filter consists of an open-loop resonator with the broadside coupled microstrip/slot hybrid unit and a microstrip open-loop resonator with short-circuited units, and the two resonators are edge-coupled to improve the performance of the filter. The effective area of designed filter is about 40.4×20 mm...
A novel and compact bandpass filter (BPF) using meandered microstrip/coplanar waveguide (CPW) hybrid structures paralleled with a pair of open-ended stepped impedance resonators (SIRs) is proposed. The distinct filtering characteristics of this new classification of transmission line filter are investigated theoretically and experimentally. At the bottom of substrate material, the two identical CPW...
A tunable modulated broadband source and narrow-bandwidth filter are used to measure chromatic dispersion, group-delay ripple, and pass-band shape of DWDM-network light paths. This new method is simple and suitable for in-service measurements.
In this paper, the proposed LC resonator-based bandpass filter embedded in a two-layer substrate is presented to achieve both miniaturization and transmission-zero creation for 3.5 GHz WiMAX applications. There are two extra transmission zeros generated near the passband for a 2nd order design without introducing either a cross-coupling mechanism between adjacent resonators or a source-load coupling...
This paper presents very small bandpass filters embedded in an organic laminate substrate for wireless system-in-package applications. Due to the lack of a fabrication process for high capacitance density capacitors on the applicable substrate, the proposed bandpass filter designs are based on a modified T prototype. By carefully taking parasitic and coupling effects into account in the filter synthesis...
A novel and compact dual-band bandpass filter (BPF) using microstrip/coplanar waveguide (CPW) composite structure is proposed. At the bottom of substrate material, the two CPW open-circuited resonators are broadside-coupled to the top microstrip transmission lines. The proposed dual-band filter has been simulated, optimized, and the obtained frequency responses demonstrated the filter with a good...
A novel low-pass filter (LPF) with harmonic-suppressed, sharp-rejection slop, wide and deep stop-band attenuation properties is proposed, which is composed of coplanar waveguide (CPW) short-circuited stubs and microstrip shunt open-end stubs as series and shunt components in the pass-band. Based on this composite microstrip/CPW structure, the low-pass filter with excellent electrical performances...
A novel and compact dual-band filter using a microstrip/coplanar waveguide (CPW) composite structure is proposed. At the bottom of the substrate material, two CPW open-circuited resonators are broadside-coupled to the top microstrip open-circuited stubs. The proposed filter was designed, fabricated and measured. The obtained frequency responses demonstrated that the filter has good dual-band property.
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