Passive integration with SAW filter using LTCC (low temperature co-fired ceramics) and multi-layer technology

Passive integration using LTCC (low temperature cofired ceramics) and multi-layer technology are going to be the key technology in the RF part of the cellular phones. They greatly contribute to the reduction of the size and weight of the handset, parts count, soldering points and RF design resources. The integration with antenna switch and SAW filters is the one of the biggest issue in GSM/DCS dual band and triple band phones. More integration is required in the next generation and some improvements are accordingly expected on SAW filters.