Katsunori Kikuchi

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A generic lumped-element circuit of dual-band bandstop filter (DBBSF) is proposed based on novel composite shunt resonators, and its design method is developed with closed-form formulas. As an example, a DBBSF with center frequencies of 1.7 and 2.3GHz is designed and fabricated using microstrip lines. The measured frequency response agrees excellently with(More)
This paper presents a new type of heterogeneous network (HetNet) with the intention of achieving both good user throughput performance and lower system power consumption, which cooperatively controls both cell selection offset (CSO) on the cell range expansion (CRE) and the transmission power for pico-eNB (PeNB TP). Average user throughput and the cell edge(More)
OBJECTIVE This study investigates obstructive sleep apnea syndrome (OSAS) prevalence among Japanese occupational drivers and factors associated with a pathological level of objective daytime sleepiness. METHODS Portable monitoring device (PMD) screening was applied to 2389 Japanese male public transportation traffic drivers. Nocturnal polysomnography(More)
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