Thin-film technology enables world’s smallest band pass filters with bottom terminals
TDK-EPC, a group company of TDK Corporation, presents the new TFSB series of TDK thin-film band pass filters, which with a footprint of 1.0 x 0.5 mm² and an insertion height of just 0.3 mm are the world’s smallest*. Thanks to their innovative terminal configuration on their bottom surface the footprint of the low-profile 1005 components is about 50 percent less than for conventional filters. The new filters are designed for the 2.4 GHz and 5 GHz bands, making them suitable for Bluetooth and WLAN applications in smartphones and other mobile phones. Mass production has started in September 2011.
The new filters achieve low-loss signal transmission and high attenuation of unwanted signals, resulting in a high signal quality. The band pass filters were developed by using a thin-film micro-wiring technology that TDK developed for the manufacturing of magnetic heads for hard disk drives. This technology enables the successful combination of outstanding performance characteristics with small dimensions and a low-profile form factor, making the product ideal for RF modules designed for smartphones and other advanced mobile phones. The operating temperature range of the product is -40 to +85 ºC.
TDK-EPC is continually expanding its portfolio of RF components based on TDK’s innovative thin-film technology. In addition to the new band pass filters, this product family also includes capacitors, baluns, couplers and diplexers.
* As of October 2011, according to TDK investigations.
Band pass filters in the 2.4 GHz and 5 GHz bands for WLAN and Bluetooth in smartphones as well as in conventional mobile phones, Bluetooth modules, Bluetooth headsets etc.
Main features and benefits
- Application of thin-film technology developed for HDD heads results in world's smallest* band pass filters with dimensions of only 1.0 x .05 x 0.3 mm³
- Bottom positioning of the terminals enables 50 percent footprint reduction, compared to similar ceramic filters.
|Frequency band [MHz]||2400 to 2500||4900 to 5850|
|Max. insertion loss [dB]|
|Operating temperature range [°C]||-40 to +85||-40 to +85|
|Max. rated power [dBm]||27||27|
|Dimensions [mm]||1.0 x 0.5 x 0.3||1.0 x 0.5 x 0.3|