CONTACT US
The power line filters, which have been developed by ShieldRoom Co., Ltd., are low-pass filters which are designed to reject the higher frequencies or electromagnetic interference waves overlapped with the commercial utility power lines used in the laboratories or shield rooms of governmental facilities, industrial experimental stations, R&D facilities, schools etc. The power line filters include line filters and power supply noise filters.
Based on our experiences through designing and constructing many shield rooms, we have realized insertion loss characteristics at actual loading conditions, which our customers have desired. Our filters will offer higher quality characteristics in wider range of frequencies than ever.
Challenges to innovative filters
Minimum 100 dB of full-load insertion loss
Our filters have achieved minimum 100 dB insertion loss under conditions near to actual operating conditions. This is innovative in the filter industry because early measuring method was that the filters were tested in different conditions from actual operating conditions. Our measuring method conforms to MIL-STD-220B and is nearly equivalent to the operation with an actual load. Our filters also show far higher characteristics under the conventional measuring method used in almost manufacturers.
Shortest delivery term
Parts used in our filters are made in Japan or in-house products. We offer higher quality products and shortest delivery term than others.
Filtering unwanted electromagnetic waves
The power line filter is designed to reject unwanted electromagnetic waves and to also reject unwanted electromagnetic waves from exiting the shield room via the power lines.
The function of power line filters
Supporting full load insertion loss characteristics
Minimum 100 dB insertion loss over 9 kHz to 20 GHz has been achieved. Higher values of attenuation enable you to obtain more accurate measurements than ever.
Electromagnetic wave rejection
Electromagnetic noises overlapped with the power lines are almost passed to the earth before entering the shield room.
Conforming to MIL-STD-220B
The measurement is conducted in accordance with the U.S. military standard MIL-STD-220B. The insertion loss measurement at 9 kHz and 14 kHz, which was controversial, is authorized.
Examples of power line filter introduction
Sound-proof
shield room
Shield room
Hospital
REVISION
- 20 February 2010 The English vertion pages have been released.
