• 제목/요약/키워드: 대역통과 필타

검색결과 2건 처리시간 0.013초

이동통신용 $(Na_{1/2}Sm_{1/2})TiO_3$ -$(Li_{1/2}Nd_{1/2})TiO_3$ 세라믹스의 마이크로파 유전특성 (Microwave Dielectric Properties of the $(Na_{1/2}Sm_{1/2})TiO_3$ -$(Li_{1/2}Nd_{1/2})TiO_3$ Ceramics for mobile communication)

  • 윤중락;이헌용;김경용
    • E2M - 전기 전자와 첨단 소재
    • /
    • 제10권9호
    • /
    • pp.901-908
    • /
    • 1997

  • The microwave dielectric properties of (Na.$_{1}$2//Sm$_{1}$2/)TiO$_3$and (Li$_{1}$2//Nd$_{1}$2/)TiO$_3$ceramics were investigated. Dielectric constant quality factor and temperature coefficient of resonant frequency of (Li$_{1}$2//Nd$_{1}$2/)TiO$_3$ceramics sintered at 145$0^{\circ}C$ for 2 hours were 86.2, 2780(at 3.8GHz) and 215ppm/$^{\circ}C$respectively. The solid solution of X(Na.$_{1}$2//Sm$_{1}$2/)TiO$_3$-(1-X)(Li$_{1}$2//Nd$_{1}$2/)TiO$_3$increased delectric constant and quality factor were decreased. Whereas temperature coefficient of resonant frequency was optimized to zero at the composition of 0.6(Li$_{1}$2//Sm$_{1}$2/)TiO$_3$-0.4(Li$_{1}$2//Nd$_{1}$2/)TiO$_3$where dielectric constant and quality factor were 86.2, 95-(at 3.8GHz) respectively. Also band-pass filters made of this material were examined.

  • PDF