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This paper proposes new microstrip bandpass Alters using modified linear tapered-line resonators (LTR) which are asymmetrical structures for improving stopband performances. The design concept is based on step impedance resonator by adjusting width on one side of the linear tapered-line resonator to be asymmetrical structure. These filters provide wider upper stopbands resulting from resonator bandstop...
A compact ultra-wideband (UWB) bandpass filter with good in-band and out-of-band performances is proposed and implemented on hybrid microstrip/slotline structure. A multiple-mode slotline resonator with stepped-impedance configuration is first properly constructed, aiming to allocate its first three resonances occurring at desired positions within the UWB passband. Two 50 Omega microstrip feed lines...
Asymmetrically-loaded interdigital coupled lines are proposed for innovative design of wideband microstrip bandpass filters with excellent out-of-band performance in both lower and upper stopbands. It is realized by properly terminating one of outer coupling lines with a two-stage open-ended stub. In this way, the lower and upper stopbands can be greatly enhanced by adjusting the stepped-impedance...
This paper presents a wideband bandpass filter design, achieved by cascading a lowpass filter and a highpass filter. The lowpass filter is designed using L-C-ladder network, where relatively high impedance line is used to realize series inductor and low impedance line is used to realize shunt capacitor. For highpass filter, high impedance inductor line is grounded using metallic via and series capacitor...
One kind of novel microwave planar power dividers/combiners are proposed and investigated in this paper. The narrow-side directional couplers constructed into substrate- integrated rectangular waveguide are employed to implement the proposed multi-way power divider/combiner. The design considerations of the multi-way power divider/combiner are introduced. One three-way power divider/combiner is designed...
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