According to the latest Expert Insight report published this week by Mobile Experts, the filter market is growing rapidly but it warns that future availability of some filters will be difficult. The RFMD/TriQuint merger is likely to result in the reduced availability of BAW filters and the Skyworks/Panasonic joint venture will attempt to lock up capacity for SAW filters. Overall, the report concludes, the business for high-performance RF filters is becoming a ''sellers market''.