The SKYA21052 from Skyworks Solutions is a RF Switch with Frequency 0.7 to 2.7 GHz, Insertion Loss 0.6 to 1.25 dB, Isolation 17 to 36 dB, Power 31 to 36 dBm, Power 1.2 to 3.9 W. Tags: Surface Mount, Antenna Tuning Switch. More details for SKYA21052 can be seen below.