RF circuit diagrams

RF circuits are not easy to build. The purpose of this page is to make the circuit diagrams available for educational purposes. I won't be able to help you contructing them or give more info than what is written on this page.

If you want more RF schematics, please check projects from Nabeel Irfan

• 27MHz superregenerative receiver for RC model remote control
• superregenerative receiver built by GE labs - sent by Trevor M0MUG
• toy car receiver L4=9 turns, .15mm wire on 4.5mm diameter tunable ferrite coil former
• toy car transmitter L1=same as L4,  L2=15 turns, .5mm wire, 5mm diameter, L3=3.5 turns, .5mm wire, 5mm diameter
• RC model receivers

• 500MHz video signal transmitter
  Ut=12/9VDC, L1=18T, L2=7T .2mm wire on 3mm diameter ferrite, L4=4T .8mm wire 4mm diameter
• wireless microphone transmitter
• 98-108MHz FM audio transmitter
• VHF transmitter
• 49MHz walkie-talkie schematic

• Automicro RX3302 superregenerative receiver module schematic
• Automicro RX3302 receiver module photo
• Automicro RX3304 receiver module schematic
• Automicro TM02 high power transmitter module schematic
• X10 RF daughter board - receiver
• 434MHz short-range communications - article in Elektor 1998/5
• SP-Elektroniikka superregenerative receiver and SAW-based transmitter
• SAW-based 434MHz transmitter schematic with RO2101 (from appnote below)
• SAW-based transmitter design appnote from RFM
• SAWR-based transmitters, EPCOS appnote#1

manufacturer name frequency (MHz) modulation transmitter receiver transceiver chip remarks Abacom Technologies AM-TXHP-433 ATX-433-IA 434 ASK TX SAW-based discrete AM-RT4 AM-RT5 315, 418, 434 ASK TX SAW-based discrete same as Telecontrolli? AM-MT1 434, 915 ASK TX SAW-based discrete RTFQ1 RTFQ2 434, 868 FSK TX TDA5100 crystal-based same as Telecontrolli? FM9TX 915 FSK TX AM-RRQ3-433 434 ASK RX TDA5210 superheterodyne same as Telecontrolli? ATR2-916 915 ASK RX TDA5210 superheterodyne AM-HRR3 AM-HRR6 418, 434 ASK RX superregenerative discrete same as Telecontrolli? ATR2-916 915 ASK RX TDA5210 superheterodyne FM9RX-914.5 915 FSK RX ARX-433-ULC 434 ASK RX RX-9H50 915 ASK RX RFRQ2 434, 868 FSK RX TDA5210 superheterodyne same as Telecontrolli? RRF1-433 434 FSK RX TDA5210 superheterodyne same as Telecontrolli? RX-DFM-5V 434 FSK RX RTL-DATA-SAW RTF-DATA-SAW 434 ASK TRX discrete AM-RTD-315 315 ASK TRX Aurel BC-NBK AC-RX AC-RX2 RX-4M30RR01SF RX-4M50RR30SF RX-AM4SF RX-AM8SF RX-4MM5 RX MID 3V 434 ASK RX RX-4M50FM60SF RX-4MF1 RX-8L50FM70SF 434 FSK RX TX-4MDIL TX-4MSIL TX-SAW MID 3V TX-SAW 433 TX-4M10HA 434 ASK TX TX-8LAVSA05 TX-8L25IA 868 ASK TX TX-FM-MID TX-8L50PF06 434, 868 FSK TX RTF-DATA-SAW RTX-RT LP 434 RTX MID 3V 434 ASK TRX XTR-434 XTR-434L WIZ2-434--RS 434 FSK TRX XTR-869 868 FSK TRX Automicro DT01 DT01L 315, 434, 868 ASK TX TDA5100 crystal-based DT01S DT01SL 315, 434, 868 ASK TX SAW-based discrete DT01F DT01FL 315, 434, 868 FSK TX TDA5100 crystal-based RX-3302 RX-3304 304, 418, 434 ASK RX superregenerative discrete RX-4303 RX-4304 304, 418, 434 ASK RX DTR01 DTR01W 434, 868 ASK TRX DTR01F DTR01FW 434, 868 FSK TRX HopeRF RFM01 315, 434, 868, 915 FSK RX IA4320/Si4320 zero-IF The chip is interfaced to a CPU and is programmed/setup through SPI. It is not advised to use in the place of dummy 3-pin modules without reading through the datasheet. The chip is the same on the modules, only the antenna matching components are tuned to the specified module frequency RFM02 434, 868, 915 FSK TX IA4220/Si4020 RFM12 315, 434, 868, 915 FSK TRX IA4420/Si4420 zero-IF RFM12B 434, 868, 915 FSK TRX IA4420/Si4420 zero-IF RFM22B RFM23B 434, 868, 915 ASK FSK GFSK TRX Si4430/1/2 zero-IF RFM42B RFM43B 434, 868, 915 ASK FSK GFSK TX Si4030/1/2 RFM64W RFM64BW 300-510 OOK, FSK TRX SX1212 (RF64W) RFM65W RFM65CW 315, 434, 868, 915 OOK FSK GFSK MSK GMSK RX SX1239 QFN24 (RF65W QFN28 with NC pins at pin 7, 14, 21, 28) RFM67B 315, 434, 868, 915 OOK GMSK FSK GFSK TX SX1230 (RF67W) RFM68B RFM68CW 315, 434, 868, 915 OOK FSK TX SX1243 (RF68W) RFM69W RFM68CW RFM69HW RFM69HCW 315, 434, 868, 915 OOK FSK MSK GFSK GMSK TRX SX1231 (RF69W) RAM01 434, 868, 915 ASK RX HM-T 315, 434, 868, 915 FSK TX IA4220/Si4020 The chip is automatically setup through SPI connected to a PIC microcontroller included on the PCB. This module can be used as a drop-in for 3-pin dummy modules HM-R 434, 868, 915 FSK RX IA4320/Si4320 RFM83 RFM83C RFM83L RFM83CL 315, 434 ASK RX SYN470R (RF83, RF83L), SYN480R (RF83C, RF83CL) superheterodyne L types are low voltage parts (2.1-3.6V), others are standard (3.6-5.5V) operating voltage parts RFM84 315, 434 ASK RX superregenerative discrete Laipac TLP315A TLP418A TLP434A TLP868A 315, 418, 434, 868 ASK TX SAW-based discrete TLP868F 868 FSK TX RLP315 RLP315A RLP418 RLP418A RLP434 RLP434A RLP868A RLP916A 315, 418, 434, 868, 915 ASK RX RLP868F 868 FSK RX RLP916F 915 FSK RX Linx Technologies TXM-315-LC TXM-315-LR 315 ASK TX TXM-418-LC TXM-418-LR 418 ASK TX TXM-433-LC TXM-433-LR 434 ASK TX TXM-869-ES 868 FSK TX TXM-916-ES 915 FSK TX TXM-900-HP3 902-928 FSK TX RXM-315-LR RXM-418-LR RXM-433-LR 315, 418, 434 ASK RX RXM-869-ES 868 FSK RX RXM-916-ES 915 FSK RX RXM-900-HP3 902-928 FSK RX TRM-315-LT 315 ASK TRX TRM-418-LT 418 ASK TRX TRM-433-LT 434 ASK TRX Low Power Radio Solutions (LPRS) AM2000 XR 433 LM-RXAM2433 434 RX LQ-TX433 LQ-TX418 LPRS MicroTX 418, 434 ASK TX OKW Electronics AMRT4 AMRT5 AMRT14 AMRTQ4 315, 418, 434 ASK TX SAW-based discrete same as Telecontrolli? AMHRR3 AMHRR6 AMHRR8 AMHRR30 315, 418, 434 ASK RX superregenerative discrete same as Telecontrolli? AMRRQ3 315, 434 ASK RX TDA5210 superheterodyne same as Telecontrolli? FMRTFQ1 315, 434 FSK TX TDA5100 crystal-based same as Telecontrolli? FMRRQ1 315, 434 FSK RX TDA5210 superheterodyne same as Telecontrolli? T5 T6 315, 434 FSK TX TDA5100 crystal-based same as Radiometrix? R5 R6 315, 434 FSK RX TDA5210  superheterodyne same as Radiometrix? FMRXQ1 434 FSK TRX same as Telecontrolli? Quasar UK QAM-TX1 QAM-TX3 315, 434 ASK TX SAW-based discrete QAM-RX2 315, 434 ASK RX superregenerative discrete QAM-RX4 315, 434 ASK RX RX3400 QFM-TX1-433 434 FSK TX TDA5100 crystal-based QFM-RX1-433 434 FSK RX TDA5210 superheterodyne QFM-TRX1-2400 2400 FSK TRX CC2500 ALPHA-TX433S 434 FSK TX IA4220 same as HopeRF The chip is interfaced to a CPU and is programmed/setup through SPI. It is not advised to use in the place of dummy 3-pin modules without reading through the datasheet. The chip is the same on the modules, only the antenna matching components are tuned to the specified module frequency ALPHA-RX433S 434 FSK RX IA4320 zero-IF ALPHA-RX915S 915 FSK RX IA4320 zero-IF ALPHA-TRX433S 434 FSK TRX IA4420 zero-IF ALPHA-TRX915S 915 FSK TRX IA4420 zero-IF Radiometrix RF solutions AM-HRR4-418 418 ASK RX superregenerative discrete same as Telecontrolli FM-TX2-433-3V 434 FSK TX same as Radiometrix R5LC-418-5-20 418 FSK RX AM-RT4 AM-RT5 AM-RT14 AM-RTQ4 QAM-TX3-434 315, 418, 434, ASK TX SAW-based discrete same as Telecontrolli? AM-HRR3 AM-HRR6 AM-HRR11 AM-HRR30-433 315, 418, 434 ASK RX superregenerative discrete same as Telecontrolli? AM-RRQ3 QAM-RX4 315, 418, 434, 868 ASK RX TDA5210 superheterodyne same as Telecontrolli? FM-RTFQ1 FM-RTFQ2 315, 434, 868 FSK TX TDA5100 crystal-based same as Telecontrolli? FM-RRFQ1 FM-RRFQ2 315, 434, 868 FSK RX TDA5210 superheterodyne same as Telecontrolli? T5 434 FSK TX same as Radiometrix? R5 434 FSK RX same as Radiometrix? QFM-TX1-434 434 FSK TX TDA5100 crystal-based QFM-RX1-434 434 FSK RX TDA5210 superheterodyne RFM TX5000 434 ASK TX TX5001 315 ASK TX TX5002 418 ASK TX TX5003 303 ASK TX TX6000 TX6004 915 ASK TX TX6001 868 ASK TX TXC100 TXC101 TXC102 303, 315, 403, 418, 434, 868, 915 FSK TX RX5000 RX5005H RX5500 434 ASK RX RX5001 315 ASK RX RX5002 418 ASK RX RX5003 RX5501 303 ASK RX RX6000 RX6004 915 ASK RX RX6001 RX6501 868 ASK RX RXC101 303, 315, 403, 418, 434, 868, 915 FSK RX TR1000 TR1004 TR1100 TR8000 TR8100 915 ASK TRX TR1001 TR8001 868 ASK TRX TR3000 TR3100 TR7000 434 ASK TRX TR3001 TR7001 315 ASK TRX DR3000 DR3300 DR4000 DR5000 DR8000 DR8100 915 ASK TRX DR3001 DR4001 DR5001 DR8001 868 ASK TRX DR3100 DR4100 DR5100 DR7000 434 ASK TRX DR3101 DR4101 DR5101 DR7001 315 ASK TRX Telecontrolli RR3 RR4 RR6 RR8 RR10 RR11 RR18 RR19 RR30 RR80 315, 418, 434 ASK RX superregenerative discrete RRQ3 RRQ4 RRQ5 RRQ6 RRQ7 315, 434, 868 ASK RX TDA5210 superheterodyne RRFQ1 RRFQ2 RRFQ3 RRFQ5 315, 434, 868 FSK RX TDA5210 superheterodyne RT4 RT5 RT6 RT11 RT14 315, 418, 434 ASK TX SAW-based discrete RT8-868 RT13-868 868 ASK TX SAW-based discrete RTQ1 RTQ4 RTQ6 315, 434, 868 ASK TX TDA5100 crystal-based RTFQ1 RTFQ2 RTFQ4 RTFQ6 315, 434, 868 FSK TX TDA5100 crystal-based RXQ1-433.9 TRXQ1-433.9 434 FSK TRX RXQ2 434, 868, 915 GFSK TRX RXQ4 434, 868, 915 TRX CC1101 The chip is interfaced to a CPU and is programmed/setup/modulated through SPI. It is not possible to use in the place of dummy 3-pin modules. Please check the datasheet. The chip is the same on the modules, only the antenna matching components are tuned to the specified module frequency

• Atmel T5754 434MHz UHF ASK/FSK transmitter
• Atmel U2741 300-450MHz UHF ASK/FSK transmitter (ATA8401, ATA8402, ATA8403, ATA8404, ATA8405)
  
• Atmel U3741 300-450MHz UHF ASK receiver (ATA8201, ATA8202, ATA8203, ATA8204, ATA8205)
  
• Atmel AT86RF211 400-950MHz programmable UHF FSK transceiver (SmartRF), (ATA5428, ATA8510, ATA8515)
  
• HopeRF RF01 FSK receiver IC, RF02 FSK transmitter IC, RF12, RF12B, RF22 FSK transceiver IC (Same as Silicon Labs EZRadio series)
  
• HopeRF RF67 OOK/FSK/GFSK/GMSK transmitter IC (Same as Semtech SX1230)
  
• HopeRF RF83, RF83C superheterodyne ASK receiver (same as Synoxo SYN470R, SYN480R)
  
• Infineon TDA5100 434/868MHz ASK/FSK transmitter
• Infineon TDA5200/5210/5220 ASK/FSK receiver
• MAX1470 315MHz Low-Power, +3V superheterodyne receiver
• MAX1472 300-450MHz ASK transmitter
• MAX1473 315/433MHz ASK superheterodyne receiver
• Melexis TH71101 315/433MHz FSK/FM/ASK, Single-Conversion Superhet
  TH71102 315/433MHz FSK/FM/ASK, Double-Conversion Superhet
  TH7122, TH71221 27-930MHz, FSK/FM/ASK transceiver
  TH72011 434MHz FSK transmitter
  TH72012 434MHz ASK transmitter
  (MLX71120, MLX71121, MLX71122 receiver, MLX72013, TH72001, TH72002, TH72005, TH72006, TH72015, TH72016, TH72031, TH72032, TH72035, TH72036 transmitter)
• Micrel MICRF113 (MICRF112, MICRF405, MICRF102) ASK transmitter (QwikRadio)
  MICRF001, MICRF011, MICRF002, MICRF022 (Same as Synoxo SYN470R, SYN480R), MICRF007, MICRF008, MICRF009, MICRF010, MICRF221, MICRF220, MICRF219, MICRF219A, MICRF218, MICRF213, MICRF211 ASK receiver
  MICRF505, MICRF505L, MIRCRF506, MICRF507 FSK transceiver
  
• Microchip rfRXD0420 434MHz ASK/FSK superheterodyne receiver (same as Melexis TH71101)
• Microchip rfPIC12F675 434MHz ASK/FSK transmitter with flash microcontroller
• Microchip PIC12F529T39A, PIC12LF1840T39A, PIC16LF1824T39A (RF part same as Semtech SX1240) OOK/FSK transmitter with flash microcontroller
• Microchip PIC12F529T48A, PIC12LF1840T48A (RF part same as Semtech SX1243) OOK/FSK transmitter with flash microcontroller
  
• Microchip MRF49XA (Same as Silabs Si4420 Si4421), MRF89XA transceivers
  
• NXP (Philips) UAA3201T 150-450MHz ASK receiver, UAA3220TS ASK/FSK receiver
  
• Nordic nRF905, nRF9E5 433/868/915 MHz transceiver (nRF903, nRF403, nRF401)
• PTC (Princeton Technology Corp.)
  PT4450 SAW-based ASK transmitter (PT4452, PT4455, PT4456, TX4915 PLL-based)
  RX3310A LC-based, PT4317 SAW-based, PT4301, PT4302, PT4304, PT4305, PT4312, PT4330 PLL-based receiver
  PT4501 FSK transceiver IC
  
• PTC (Himark) RX3310A, RX3400 low power (2mA) UHF ASK receiver
• RFMD RF2915 433/868/915 MHz FSK/ASK/OOK transceiver
• RFMD RF2510 433/915MHz UHF FM/FSK transmitter
• Semtech SX1240, SX1243 ASK/FSK, SX1242 OOK, SX1223 2FSK, SX1230 OOK/FSK/GFSK transmitters
  SX1210, SX1213, SX1239 receivers
  SX1276, SX1272, SX1232, SX1236,SX1235, SX1231J, SX1231H, SX1231, SX1233, SX1211, SX1212, SX1257, SX1282, XE1209 transceivers
  
• Semtech (Xemics) XE1201A 300-500MHz FSK transceiver
  XE1205 433/868/915MHz multi-channel FSK transceiver
• Silicon Labs (Integration Associates)
  IA4220, IA4221, IA4230, Si4020, Si4021, Si4022, Si4030, Si4031, Si4032 315,434,868,915MHz programmable no-parts FSK transmitter (EZRadio, EZRadio PRO)
• Silicon Labs (Integration Associates)
  IA4320, IA4322, IA4330, Si4320, Si4322, Si4330 315,434,868,915MHz programmable no-parts zero-IF FSK receiver (EZRadio, EZRadio PRO)
• Silicon Labs (Integration Associates)
  IA4420, IA4421, IA4430, IA4431, Si4420, Si4421, Si4431, Si4432 FSK transceiver (EZRadio, EZRadio PRO)
• Synoxo SYN470R, SYN480R superheterodyne receiver (same as HopeRF RF83, RF83C, Micrel MICRF002, MICRF022)
  
• TI TRF1400 200-450MHZ ASK receiver, obsolete
• TI TRF4400 434MHz ASK transmitter
• TI (Chipcon) CC1000, CC1100, CC1101 300-1000MHz programmable UHF FSK transceiver (SmartRF)