Directional couplers from Murata save PCB space in cellular phones

Couplers like these are typically used in the transmit path of a cellular phone to adjust and optimise the power amplifier’s (PA) output power, helping to improve battery life in today’s handheld wireless products. The LDC15 series boasts a very low insertion loss of less than 0.2dB (typical at 25degC), minimising the impact on the transmit signal power. High isolation between 34 and 32dB is achieved.

The LDC15 series of directional couplers is rated for use between -40 and 85degC, with a power rating of 3W.