RF Circuits

  

This list of circuits are related to Radio frequency (RF), that deals with circuits that are designed to operate in the radio frequency spectrum. These circuits are set to operate within the range of about 3 kHz up to 300 GHz.

These circuits are incorporated with everything that transmits or receives radio waves, like mobile phones, radios, Wi-Fi, two-way radios, gps circuits, jammer ciruits, transmitters, rf amplifiers, RF oscillators, PLLs, Voltage-controlled oscillators, Transmitters, Transmission lines, RF connectors, Antennas, Receivers, Tuners, Modulators, demodulators, detectors, RF filters, RF shielding, Ground plane, DSSS, Digital radio, etc. 

Electric currents that oscillate at radio frequencies have special properties not shared by direct current or alternating current of lower frequencies. The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology. RF current does not penetrate deeply into electrical conductors but flows along their surfaces; this is known as the skin effect. For this reason, when the human body comes in contact with high power RF currents it can cause superficial but serious burns called RF burns. In order to receive radio signals an antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in to a particular frequency (or frequency range). This is typically done via a resonator in its simplest form, a circuit with a capacitor and an inductor forming a tuned circuit. Radio frequency (RF) energy has been used in medical treatments for over 80 years,  generally for minimally invasive surgeries, using radiofrequency ablation and coagulation, including the treatment of sleep apnea. Magnetic resonance imaging (MRI) uses radio frequency waves to generate images of the human body.

People are requesting walkie-talkie and RF remote control schematics, so here are some. Building these circuits needs special equipment and expertise in RF circuits. If you have no experience in RF, I suggest that you choose the easy way and buy a ready-made RF module. Otherwise you can realize you have an exact copy of a circuit in your hand, still it doesn't work the way it should.

Circuits


sponsored links


The Radio Frequency RF remote control circuit has wide range of applications and we have been using this in our daily life. And its important for Electronics engineers and hobbyist to understand th...

This book is intended for senior undergraduate and graduate students as well as practicing engineers who are involved in design and analysis of radio frequency (RF) circuits. Detailed tutorials are...

Apparently, we have mentioned some of the examples previously. Radio electronic technically means those devices which are concerned with electronic circuits and those which are capable of transmitt...

By Mick Tegethoff and David Lee Today's consumer, communication, and computer electronic devices have clocks, communication interfaces, and high-speed signal-conditioning circuits that operate at r...

It's a Microcontroller Based DIY Electronics Project. Named Wireless RF Module Using PIC Microcontroller. The RF module is a small electronic circuit used to transmit, receive, or transceive radio ...

11 High ]Frequency (RF) Electronics 370. 11.1 Circuits at Radio Frequencies 370. 11.2 RF Ranges and Uses 372. 11.3 Special Characteristics of RF Circuits 375. 11.4 RF Transmission Lines Filters and...


https://youtube.com/devicesupport


#83: Basics of RF Mixers in Radio Receivers / Mixer Tutorial / Frequency Conv...


Arduino Tut. #8 - Wireless RF Links Tutorial & Noise Reduction


How To Capture DC Voltage from Radiofrequency (RF) Radiation