Thin film, common mode filters have high attenuation for mobile devices

The increased multi-functionality of wireless devices such as smartphones, wearables and other mobile products results in noises generated inside the devices deteriorating wireless signals. To prevent the deterioration of signal reception sensitivity and to prevent external noise that has the potential to cause device malfunction TDK has reduced both the footprint and the weight of thin film, common mode filters to produce the TCM0403M series.

The use of thin film means that the footprint is 58 per cent smaller and they weigh 56% less than existing products, said the company.

The TCM0403M series of filters are offered in 0403 case size (0.45 x 0.3 x 0.23mm) and use TDK’s proprietary fine pattern technology. The common mode attenuation equals existing products, said TDK, to reduce intruding noise and to improve wireless signal reception sensitivity.

The common mode attenuation at 2.4GHz is 21dB, and 28dB at 5.0GHz, with a maximum permissible current of 50mA. Its differential transmission is capable of supporting high speed signal transmission.

The filters can be used in high speed differential interfaces, such as USB, MIPI and HDMI, in mobile devices.

The TCM0403M series filters are in mass production.

TDK was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. It also includes sensors and sensor systems such as temperature and pressure, magnetic and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads.

Products are marketed under the brands TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda.

TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.

About Weartech

This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the wearable electronics industry, with daily news updates, new products and industry news. To stay up-to-date, register to receive our weekly newsletters and keep yourself informed on the latest technology news and new products from around the globe. Simply click this link to register here: