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Öğe A novel double-frequency-tuned photonic bandgap (PBG) structure(IEEE, 2001) Gorur, A; Karpuz, C; Gorur, H; Yalcin, KA novel one-dimensional (1-D) photonic bandgap (PBG) structure for microstrip lines is proposed in this study. The PBG structures are designed and fabricated with different configurations, but the same period. It is shown that the stopband characteristics may be controlled by the geometrical configuration. Also, double-frequency-tuned PBG structure is derived by changing the geometrical configuration and the dimension of a conductor strip in geometrical structure.Öğe A study on resonance characteristics of a microstrip open-loop resonator(JOHN WILEY & SONS INC, 2001) Gorur, A; Karpuz, C; Yilmaz, A; Yalcin, KA microstrip open-loop resonator (MOLR) is proposed for maximum miniaturization in microwave applications, and to obtain a wider upper stopband including the first spurious resonance frequency for planar bandpass filters. The effect of variation in the width of one of the longer strips of an OLR formed in two ways (namely, fired-gap (FG) and variable-gap (VG) OLR) on their resonance characteristics is discussed. Also, simple empirical expressions indicating the effect of variation in the strip width are derived for estimation of the resonance frequency as a function of the variable strip width and the fundamental resonance frequency of the standard loop resonator. (C) 2001 John Wiley & Sons, Inc.Öğe An investigation on resonance characteristics of CPS open-loop resonator(IEEE, 2001) Karpuz, C; Gorur, H; Yalcin, K; Gorur, AA novel coplanar stripline (CPS) open-loop resonator (OLR) is proposed for maximum miniaturization in uniplanar microwave applications. The effect of variation in the one's width of longer strips of OLR formed in two ways (namely, CPS fixed gap (FG) and CPS variable gap (VG) OLR) on their resonance characteristics is discussed. It is also shown that (VG) OLR structure supports a wider upper stopband including the first spurious resonance frequency.Öğe Bandstop filter with a wider upper passband using microstrip open-loop resonator(IEEE, 2001) Gorur, A; Karpuz, C; Yalcin, K; Gorur, HWe propose a bandstop filter with a wider upper passband using microstrip open-loop resonators for modern communication systems. A microstrip open-loop resonator (MOLR) is discussed for maximum miniaturization in microwave applications and to obtain a wider upper stopband (or passband) including the first spurious resonance frequency for planar filters. The bandstop filter is designed and fabricated using a full-wave simulator. The measured filter performance shows a good agreement with the simulated response.
