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.

FeaturesFET RF SwitchPIN Diode RF Switch
ConstructionUses GaAs FET devices.Uses PIN diode devices.
Working OperationA 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 DiagramsFET SPDT switch This is a SPDT type simple schematic using FETs. Other configurations include double stack structure (two FETs in series), hybrid types, etc.PIN diode SPDT switch This is a series PIN diode RF switch. Other configurations are shunt type, series-shunt type, and anti-series type, etc.
Operating FrequencyFrom DCFrom MHz
Insertion LossHigherMedium
IsolationGood at lower end frequenciesGood at higher end frequencies
RepeatabilityExcellentExcellent
Return LossGoodGood
Switching SpeedFasterFaster
Power HandlingLowerLower
Life of SwitchHigherHigher
ESD ImmunityLowerMedium
FET and PIN Diode RF Switch Circuits Explained

FET and PIN Diode RF Switch Circuits Explained

Explore RF switch circuits using FET and PIN diodes for signal control. Learn about their operation, diagrams, and use cases in RF systems, offering low loss and high isolation.

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PIN Diode RF Switch and Attenuator Design

PIN Diode RF Switch and Attenuator Design

Explore PIN diode characteristics and circuit designs for RF switches and attenuators. Learn how PIN diodes are used to control RF power in microwave circuits.

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PIN Diode Fundamentals and Applications

Explore the basics of PIN diodes, their unique structure with an insulating layer, and their applications in RF switching, phase shifters, and amplitude modulators.

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