Transistors - FETs, MOSFETs - RF

Image Part Number Description / PDF Quantity Rfq
AFT20P140-4WGNR3

AFT20P140-4WGNR3

NXP Semiconductors

FET RF 2CH 65V 1.91GHZ OM780-4GW

0

MRF373ALSR5

MRF373ALSR5

NXP Semiconductors

FET RF 70V 860MHZ NI-360S

0

MRF19045LR5

MRF19045LR5

NXP Semiconductors

FET RF 65V 1.93GHZ NI-400

0

MRF7S18170HSR5

MRF7S18170HSR5

NXP Semiconductors

FET RF 65V 1.81GHZ NI-880S

0

MRF1570NT1

MRF1570NT1

NXP Semiconductors

FET RF 40V 470MHZ TO272-8 WRAP

0

BLM7G22S-60PB,118

BLM7G22S-60PB,118

NXP Semiconductors

TRANS RF PWR LDMOS 60W 16HSOP

0

MRF19090SR3

MRF19090SR3

NXP Semiconductors

FET RF 65V 1.93GHZ NI-880S

0

BLF8G22LS-310AVJ

BLF8G22LS-310AVJ

NXP Semiconductors

IC TRANS LDMOS 140W ACC-8L

0

MRF5S21150HSR3

MRF5S21150HSR3

NXP Semiconductors

FET RF 65V 2.17GHZ NI-880S

0

MRF21010LSR5

MRF21010LSR5

NXP Semiconductors

FET RF 65V 2.17GHZ NI-360S

0

MRF5S19090HR5

MRF5S19090HR5

NXP Semiconductors

FET RF 65V 1.99GHZ NI-780

0

MMRF5015NR5

MMRF5015NR5

NXP Semiconductors

TRANS RF N-CH 125W 50V

0

Transistors - FETs, MOSFETs - RF

1. Overview

RF FETs and MOSFETs are critical semiconductor devices designed for high-frequency signal amplification and switching in radio frequency (RF) applications. These transistors operate efficiently in microwave and RF circuits, enabling wireless communication, radar systems, and broadcasting equipment. Their ability to handle high frequencies (typically above 1 MHz) with minimal noise and distortion makes them indispensable in modern telecommunications infrastructure.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Junction FET (JFET)Voltage-controlled device with low noise and high input impedanceLow-noise amplifiers in RF receivers
MESFETMetal-Semiconductor FET with GaAs substrate for high-speed operationSatellite communication systems
HEMT/PHEMTHigh-electron-mobility transistor with pseudomorphic structures5G base stations, microwave amplifiers
LDMOSLateral Diffused MOSFET with high power density and thermal stabilityCellular base station amplifiers
GaN HEMTGallium Nitride-based HEMT for ultra-high frequency/powerRadar systems, 5G mmWave

3. Structure and Composition

RF FETs typically feature a three-terminal structure (source, gate, drain) with a semiconductor channel (Si, GaAs, or GaN). The gate region uses Schottky contacts (MESFET) or insulated layers (MOSFET). Advanced devices like HEMTs employ heterojunctions between different semiconductor materials (e.g., AlGaN/GaN) to enhance electron mobility. Packaging includes ceramic or plastic enclosures with RF-compatible connectors to minimize parasitic capacitance and inductance.

4. Key Technical Specifications

ParameterDescriptionImportance
Frequency RangeOperational bandwidth (e.g., 0.1-6 GHz)Determines application suitability
Power Output (P1dB)1dB compression point (e.g., 10-500W)Measures linearity and saturation
Gain (S21)Signal amplification ratio (e.g., 10-30 dB)System sensitivity indicator
Efficiency (PAE)Power-added efficiency (e.g., 40-75%)Energy consumption metric
Input/Output VSWRVoltage Standing Wave Ratio (e.g., <2:1)Mismatch loss assessment

5. Application Fields

  • Telecommunications: 5G/4G base stations, small cells, fiber-optic networks
  • Defense: Radar systems, electronic warfare, UAV communication
  • Broadcasting: FM/TV transmitters, satellite uplinks
  • Medical: MRI machines, RF ablation equipment
  • Industrial: Plasma generators, RFID readers

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Specifications
NXP SemiconductorsMRF1K50GN50W GaN HEMT, 1.8-2.7GHz, 70% PAE
Wolfspeed (Cree)CGH4G090400F400W GaN HEMT, 900MHz, 10:1 VSWR ruggedness
InfineonBLS14H10LS-250250W LDMOS, 1.8-2.2GHz, 14dB gain
MACOMNPT1007SiGe HBT, 7GHz, 18dB gain for 5G

7. Selection Recommendations

  1. Match operating frequency to device transition frequency (fT)
  2. Verify power handling with derating curves under working temperatures
  3. Assess package thermal resistance (Rth) for longevity
  4. Compare S-parameters for impedance matching requirements
  5. Consider ESD protection and ruggedness for field conditions

8. Industry Trends

Key trends include: - Wide bandgap materials (GaN/SiC) enabling higher efficiency (>80%) at mmWave frequencies - 3D packaging for reduced parasitics in 5G massive MIMO systems - Integrated RF frontend modules (FEM) with on-chip matching networks - AI-driven design optimization for complex impedance matching - Growing adoption of GaN-on-diamond substrates for thermal management

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