a tunable filter reduces the total number of filters used in tdd communication circuitry . the communication circuitry may include a tunable filter and a first switch associated with the tunable filter . the tunable filter may include a tuning component and a filtering component . the tuning component may be located with the first switch on a first die . the filtering component may be located in a laminate underneath the first switch . power amplifiers for amplifying transmission signals may be located on a second die , and the second die may be located on the laminate .