Hybrid Multiplexer Shrinks Smartphone Wireless Circuits


Murata has developed a hybrid multiplexer measuring 3.5 x 3.5 x 0.9 mm for smartphones. This product can branch one antenna signal to three frequency bands, and therefore reduces the number of antennas and contributes to device size reduction when used with a wireless circuit. 

The new LMTP3P series acheives steep attenuation and wide band transmission utilising the firm’s original technology that combines the properties of a multilayer ceramic and a SAW filter, according to the announcement.

Carrier aggregation and MIMO antenna systems are being increasingly adopted in LTE3 communications in order to improve communications speeds for smartphones. With LTE, the communication frequencies are divided to low band (698~960MHz), middle band (1427~2200MHz) and high band (2300~2690MHz).

With carrier aggregation, which simultaneously uses multiple frequency bands, an antenna is generally required for each frequency band. MIMO systems, which improve communications speed by using multiple transceiving antennas, are also being used, but they increase the quantity of required antennas and make the wireless circuit more complex.

“The hybrid multiplexer can branch to the three frequency bands, thereby reducing the number of antennas needed for carrier aggregation”, noted the firm.

This provides design surface area for MIMO systems that require multiple antennas, and can contribute to size reduction for a device.

The tiny multiplexer supports LTE and GMS transceiver applications. Mass production of the hybrid multiplexer began this April.

For further details, view the full Press release.

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