FET RF Switch vs PIN Diode RF Switch: A Comparison
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This page compares FET RF Switches and PIN Diode RF Switches, highlighting the key differences between them. Both are solid-state devices, making these switches solid-state switches. A combination of both FET and PIN diode-based switches is known as a hybrid switch.
Features | FET RF Switch | PIN Diode RF Switch |
---|---|---|
Construction | Uses GaAs FET devices. | Uses PIN diode devices. |
Working Operation | A FET switch creates a channel (depletion layer) allowing current to flow from the Drain terminal to the Source terminal of the FET. | A PIN diode consists of a high resistivity intrinsic layer sandwiched between P (positively charged) and N (negatively charged) materials. |
SPDT Switch Schematic Diagrams | ![]() | ![]() |
Operating Frequency | From DC | From MHz |
Insertion Loss | Higher | Medium |
Isolation | Good at lower end frequencies | Good at higher end frequencies |
Repeatability | Excellent | Excellent |
Return Loss | Good | Good |
Switching Speed | Faster | Faster |
Power Handling | Lower | Lower |
Life of Switch | Higher | Higher |
ESD Immunity | Lower | Medium |