SKYA21041 5GHz 802.11ac Switch/LNA Front End Skyworks Solutions Inc. SKYA21041 5GHz 802.11ac Switch/LNA Front End integrates a Single-Pole, Double-Throw (SPDT) Switch and a Low-Noise Amplifier (LNA) with a bypass mode into an ultra-compact package. The SKYA21041 is designed to enable switching between WLAN Receive and WLAN Transmit. Skyworks Solutions Inc. SKYA21041 is offered in a compact 6-pin 1.2mm x 1.4mm Dual Flat No-lead (DFN) package, ideal for space-constrained applications.