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Recently a new systematic design rule was proposed to realize high-order UWB bandpass filters using cascaded E-shape microstrip structures. The responses of these miniaturized filters show one transmission zero at the upper stop-band. In order to improve the selectivity at the lower stop-band, this paper proposes a new generation of miniaturized high-order UWB bandpass filters having an attenuation...
Based on a unique E-shape microstrip structure and its equivalent circuit, a compact and highly selective seventh-order UWB bandpass filter is developed for small wireless communication systems. This highly selective UWB bandpass filters offers ultra-wide stopband attenuation. The filter composes of six grounded middle stub E-shape microstrip structures connected in cascade using short sections of...
One type of E-shape microstrip structure is composed of λg/2 hairpin resonator loaded by a grounded stub at its middle. For the first time, using an equivalent circuit for this structure, high-order UWB bandpass filter design technique is presented based on cascading E-shape microstrip structures. Two third-order UWB bandpass filters are designed, simulated, fabricated and measured. These filters...
Recently the E-shape microstrip structure was proposed in order to develop miniaturized ultra-wide band (UWB) bandpass filters. In spite of its attractive features, no thorough analysis of this structure is available in the literature. In this paper, the E-shape microstrip structure with grounded center conductor is analyzed and, for the first time, an approximate equivalent circuit is proposed for...
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