| Project/Area Number |
17560305
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
WADA Kouji The University of Electro-Communications, Faculty of Electro-Communications, Associate professor (60316891)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2005: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | UWB / BPF / Microstrip line / Quasi-LC circuit / Miniaturization / BPF / パッシブフィルタ / 減衰極 |
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| Research Abstract |
Ultra-Wideband Systems have lately attracted considerable attention because of their authorization problem. The passive circuits such as filters and bulns requires the satisfactory performances for FCC mask. Bandpass filters(BPFs) with wide passband characteristics have already examined by several researchers at home as well as abroad. In this study, wideband BPFs with attenuation poles for wideband communication systems are examined. Firstly, the resonators for the wideband BPFs are examined. There are three types of resonators such as open-circuited end type, short circuited end type and open-circuited/short-circuited type. Simulations of the resonance characteristics of the proposed resonators are carried out by EM simulator and circuit simulators under the conditions that line length and line width are changed. Secondly, various wideband BPFs(bandwidth ranging from 3.1GHz to 10.6GHz) using proposed resonators are examined theoretically and experimentally. There are five types of the examined BPFs such as open-circuited end type, short circuited end type, open-circuited/short-circuited type and mixed resonators types. As the results, wideband characteristics are realized by the BPFs under the basic characteristics of the proposed resonators. We have also confirmed that miniaturization(3.1-4GHz) and control of bandwidth can be possible. Miniaturization of the wideband BPF is carried out based on quasi-LC circuit and small-sized resonators. The control of bandwidth o the BPF is achieved by using stub-resonators with loaded capacitors.
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