TDK-EPC has introduced two new EPCOS RF duplexers with greatly improved linearity values. The B7654 type was developed for CDMA applications, the B7928 type for LTE band 13. The combination of both duplexers in a device allows the simultaneous transmission of voice and data.
Thanks to the high linearity achieved, sensitivity in the input paths is increased. This allows developers to significantly simplify the architecture of the RF input circuit because additional components for linearisation are not needed.
Duplexers of the B7654 type are designed for the frequency band from 824 to 849 MHz in transmit operation and from 869 to 894 MHz in receive operation. Attenuation of up to 57 dB is attained between the transmit and receive bands. Interfering GPS frequencies are attenuated by 40 dB.
The B7928 type is designed for the frequency band from 777 to 787 MHz in transmit operation and from 746 to 756 MHz in receive operation. Attenuation of up to 62 dB is attained between the transmit and receive bands. Interfering GPS frequencies are attenuated by 45 dB.
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