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COMMUNICATION CIRCUIT, COMMUNICATION APPARATUS, IMPEDANCE MATCHING CIRCUIT AND IMPEDANCE MATCHING CIRCUIT DESIGNING METHOD

Foreign code F110005921
File No. QP040088-PC
Posted date 2011年11月28日
Country 世界知的所有権機関(WIPO)
International application number 2006JP304154
International publication number WO 2006/126320
Date of international filing 平成18年3月3日(2006.3.3)
Date of international publication 平成18年11月30日(2006.11.30)
Title COMMUNICATION CIRCUIT, COMMUNICATION APPARATUS, IMPEDANCE MATCHING CIRCUIT AND IMPEDANCE MATCHING CIRCUIT DESIGNING METHOD
Abstract A communication circuit (1) is provided with, for instance, an antenna section (3) such as a nonresonant antenna, and a matching section (5) for performing impedance matching by being connected to the antenna section (3). The matching section (5) is provided with a transmission line, and the electrical length and characteristic impedance of the transmission line are decided based on a frequency or frequency band where the antenna section (3) and the transmission line resonate. In the nonresonant antenna, for instance, since there is no need for matching the resonance frequency with a center frequency, the antenna can be reduced in sizes. Furthermore, a wide band can be achieved by changing the characteristic impedance of the transmission line.
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • Kyushu University, National University Corporation
  • Fukuoka Industry, Science & Technology Foundation
  • Inventor
  • YOSHIDA, Keiji
  • KANAYA, Haruichi
IPC(International Patent Classification)
Specified countries AE,AG,AL,AM,AT,AU,AZ,BA,BB,BG,BR,BW,BY,BZ,CA,CH,CN,CO,CR,CU,CZ,DE,DK,DM,DZ,EC,EE,EG,ES,FI,GB,GD,GE,GH,GM,HR,HU,ID,IL,IN,IS,JP,KE,KG,KM,KN,KP,KR,KZ,LC,LK,LR,LS,LT,LU,LV,LY,MA,MD,MG,MK,MN,MW,MX,MZ,NA,NG,NI,NO,NZ,OM,PG,PH,PL,PT,RO,RU,SC,SD,SE,SG,SK,SL,SM,SY,TJ,TM,TN,TR,TT,TZ,UA,UG,US,UZ,VC,VN,YU,ZA,ZM,ZW,EP(AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HU,IE,IS,IT,LT,LU,LV,MC,NL,PL,PT,RO,SE,SI,SK,TR),OA(BF,BJ,CF,CG,CI,CM,GA,GN,GQ,GW,ML,MR,NE,SN,TD,TG),AP(BW,GH,GM,KE,LS,MW,MZ,NA,SD,SL,SZ,TZ,UG,ZM,ZW),EA(AM,AZ,BY,KG,KZ,MD,RU,TJ,TM)
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