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In this paper, we propose a UWB bandpass filter composed of periodically-installed metallic posts in a rectangular waveguide, and study the basic behaviour both theoretically and experimentally. From the simulation, the wide passband from 5.95 GHz to 13.9 GHz and the well-suppressed out-of-passband were obtained, which results were verified experimentally. For the design of UWB response, we also study...
This paper proposed a UWB bandpass filter composed of asymmetric E-shaped electrodes. By tuning the length of the electrodes' fingers, the locations of the transmission zeros at the higher out-of-passband were synthesized separately and widely-suppressed out-of-passband response was realized. Compared with the symmetric model shown in Fig. 1 (a), the dimensions of the new model was 5.1 mm by 5.1 m...
This paper studies multi-layered composite right-/left-handed transmission lines (ML CRLH TL). To realize wideband response from left-handed passband to right-hand passband without band gaps and other undesired parasitic resonances, a balanced ML CRLH TL with defected parallel plates is newly proposed and demonstrated theoretically by using FEM-based EM simulator. A wide passband from 2.0 GHz to 9...
We have reported a compact planar-type UWB bandpass filter with tightly coupled E-shaped electrodes by Y. Horii (2007). In this paper, a useful and practical design procedure for this filter is developed, and explained in details with full-wave simulations. In addition, the resulting model designed by the introduced procedure is demonstrated experimentally to confirm the theoretical predictions. Furthermore,...
This paper proposes a new planar-type ultra- wideband (UWB) bandpass filter (BPF), and the basic behaviour of the filter is studied theoretically and experimentally. The UWB BPF, having a widely spread passband from 3.7 GHz to 10.4 GHz (theory), mild group delay of about 0.2 ns (experiment), and two convenient attenuation poles around the passband, has been developed in a very compact size (10 mm...
This paper proposes a novel ultra-wideband (UWB) bandpass filter (BPF) with a shielded multi-layered (ML) structure. Compared with recently proposed planar UWB BPFs based on a microstrip line configuration, this filter can be made more compact and can reduce the interference to other circuit components. We have studied the scattering characteristics of the filter with a finite element method (FEM),...
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