Effect of Test Board on Insertion Loss of GHz Multilayer LC-Filter

GHz용 적층 LC필터의 삽입손실에 대한 Test Board의 영향

  • Chun, Myoung-Pyo (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Cho, Jung-Ho (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Kim, Byung-Ik (Korea Institute of Ceramic Engineering and Technology (KICET))
  • Published : 2005.11.10

Abstract

The effects of PCB Board on the filter characteristics such as insertion loss and transmission characteristics were investigated for the measurement of 5GHz LC filter. Insertion loss measured with PCB Board of Teflon is 0.3 dB lower in comparion with FR-4. The filter characteristics measured in the passband were different from the calculated results. In comparison with the calculated value, the measured value shows that center frequency is 20MHz lower, passband is narrower and insertion loss is larger. The difference of Insertion loss between Teflon and FR-4 increases with increasing measurement frequency.