B4005 959.5 MHz 914.5 MHz Low-Loss Duplexer for Mobile Communication is a low-loss duplexer that is suitable for cordless telephone CT1. It does not require a matching network for operation at 50 Ω. The duplexer is housed in a ceramic package and is suitable for surface mount technology (SMT).
The B4005 is a low‑loss SAW duplexer designed for mobile communication applications. It operates on two channels, with center frequencies of 959.5 MHz (channel 1) and 914.5 MHz (channel 2), and requires no external matching network.
Key specifications include an operating temperature range of 0 °C to +60 °C, antenna impedance of 50 Ω, maximum insertion attenuation of 3.3‑4.0 dB (channel 1) and 3.0‑4.0 dB (channel 2), DC supply voltage of 3 V, and input power of 17 dBm. The component is supplied in a compact ceramic QCC‑8B package suitable for surface‑mount technology.
| Center frequency (channel 1) | 959.5 MHz |
|---|---|
| Center frequency (channel 2) | 914.5 MHz |
| Antenna impedance | 50 Ω |
| DC supply voltage (Voc) | 3 V |
| Input power (Pn) | 17 dBm |