TY - GEN
T1 - Ferrite thin film noise suppressor suitable for flexible printed circuit
AU - Kondo, Koichi
AU - Ono, Hiroshi
AU - Yoshida, Shigeyoshi
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/8/3
Y1 - 2015/8/3
N2 - Conducted and radiated noise suppression effects attained by the ferrite-plated thin film of 3 μm in thickness were evaluated using the mock samples of ferrite-plated flexible printed circuits (FPCs), in order to confirm a feasibility of its application to FPCs as a novel thin film noise suppressor. Transmission loss power ratio i.e. conducted noise suppression effect was evaluated from the measured S-parameters using the flexible microstrip line of 70 mm in length up to 6 GHz. The transmission loss power ratio attained by the ferrite film increased with increasing frequency, reaching approximately 4 dB attenuation enhancement at 6 GHz. This was almost the same as the commercially-available composite-type noise suppression sheet (NSS) of 50 μm in thickness. Radiated noise suppression effect was evaluated from 0.7 GHz to 5 GHz using the radiation suppression ratio, which was defined as the transmission parameter S21 from the flexible open circuit of 1 m in length to the receiving antenna 3 m away from the circuit. The radiation suppression ratio suppressed by the ferrite film was approximately 10 dB in average at 0.7 GHz, which was effective up to 5 GHz. This was also equivalent to the composite-type NSS. These experimental results suggest that the ferrite-plated film is an effective noise suppressor for FPC, suppressing the noise currents and radiated emission up to several GHz.
AB - Conducted and radiated noise suppression effects attained by the ferrite-plated thin film of 3 μm in thickness were evaluated using the mock samples of ferrite-plated flexible printed circuits (FPCs), in order to confirm a feasibility of its application to FPCs as a novel thin film noise suppressor. Transmission loss power ratio i.e. conducted noise suppression effect was evaluated from the measured S-parameters using the flexible microstrip line of 70 mm in length up to 6 GHz. The transmission loss power ratio attained by the ferrite film increased with increasing frequency, reaching approximately 4 dB attenuation enhancement at 6 GHz. This was almost the same as the commercially-available composite-type noise suppression sheet (NSS) of 50 μm in thickness. Radiated noise suppression effect was evaluated from 0.7 GHz to 5 GHz using the radiation suppression ratio, which was defined as the transmission parameter S21 from the flexible open circuit of 1 m in length to the receiving antenna 3 m away from the circuit. The radiation suppression ratio suppressed by the ferrite film was approximately 10 dB in average at 0.7 GHz, which was effective up to 5 GHz. This was also equivalent to the composite-type NSS. These experimental results suggest that the ferrite-plated film is an effective noise suppressor for FPC, suppressing the noise currents and radiated emission up to several GHz.
UR - http://www.scopus.com/inward/record.url?scp=84964001485&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84964001485&partnerID=8YFLogxK
U2 - 10.1109/APEMC.2015.7175341
DO - 10.1109/APEMC.2015.7175341
M3 - Conference contribution
AN - SCOPUS:84964001485
T3 - 2015 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2015
SP - 524
EP - 527
BT - 2015 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2015
Y2 - 25 May 2015 through 29 May 2015
ER -