Quadplexer SAW/BAW Filter Manufacturers for LTE and 5G

This article describes the Quadplexer SAW/BAW filter used in LTE and 5G mobile phones. It lists vendors or manufacturers of Quadplexer filters based on SAW/BAW filter designs.

What is a Quadplexer Filter?

As shown above, a quadplexer has 4 ports in addition to one antenna port. It functions as a 4-port to 1-port multiplexer/de-multiplexer. The figure depicts a quadplexer device with 2 receive ports (P3 and P5), 2 transmit ports (P2 and P4), and one antenna port (P1).

Due to its ultra-small size requirements, it can be used to reduce the cost of overall end-device development. Moreover, it is ideal for space-constrained applications.

Technical Specifications of Quadplexer Filters

The following technical specifications of Quadplexer filters should be considered while selecting or buying:

• Bands or frequency range
• Insertion Loss (in transmit direction)
• Compact Form Factor
• Power handling capacity at input ports
• VSWR at Tx port, ANT port
• Attenuation at different frequency range
• Tx to Rx Isolation

Example: Band 25/4 and Band 1/3 quadplexers

Quadplexers allow two bands (i.e., Band 25/4 or Band 1/3) to be connected to an antenna at the same time. This is very useful for carrier aggregation, where a mobile handset may want to receive on two bands simultaneously or transmit on two bands concurrently.

Quadplexer Filter Manufacturers

The following table lists Quadplexer filter manufacturers with part numbers and technical features: