The HHM22137A2 Signal Conditioning DIRECTNL COUPLR GSM/WCDMA/LTE698-2620MHz manufactured by TDK is a customized signal conditioning directional coupler designed to operate in a variety of operating conditions. It is designed to work in a wide range of frequencies, including 2G, 3G, and 4G networks, from 698 MHz up to 2620 MHz. It features a passive design, which helps reduce energy consumption, low insertion loss for a given operating frequency, and precise coupling ratio performance. The design is also tailored to have high directivity and wide operating temperature range. This makes it suitable for both indoor and outdoor applications. Furthermore, it is compatible with TDK's MOKO packaged coupler and filter assemblies.