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.

 

 

News

Technavio Announces Top Five Vendors in the Global Bulk Acoustic Wave RF Filter Market from 2016 to 2020

Technavio Announces Top Five Vendors in the Global Bulk Acoustic Wave RF Filter Market from 2016 to 2020 Business Wire (press release) According to Technavio, the global bulk acoustic wave RF filter market vendors has...

May 30, 2016

Lumentum recognizes Sanmina with 'Excellence In Value Innovation' award

Lumentum recognizes Sanmina with 'Excellence In Value Innovation' award Semiconductor Today Lumentum and Sanmina have been working together since 2009 to design and produce active and passive optical components ,...

May 30, 2016

This tiny DIY PC is perfect for learning and hacking

Geek This tiny DIY PC is perfect for learning and hacking Geek ELLO consists of six stacked circuit boards (all pre-soldered components ) that you sandwich together to create the body of the device. It's only...

May 26, 2016

Resonant to Present at the LD Micro Invitational on June 8 in Los Angeles

Resonant to Present at the LD Micro Invitational on June 8 in Los Angeles Business Wire (press release) The RFFE is the circuitry in a mobile device responsible for the radio frequency signal processing and is located...

May 26, 2016

DOD Sees Tiny RFID Chip as a Way to Verify Electronics

DOD Sees Tiny RFID Chip as a Way to Verify Electronics RFID Journal Northrop Grumman is heading a four-year project for the Defense Advanced Research Project Agency (DARPA) to devise a tiny radio frequency...

May 24, 2016

National Instruments extends AWR Connected for EM interoperability

National Instruments extends AWR Connected for EM interoperability - Intelligent Aerospace Intelligent Aerospace The NI AWR Design Environment software portfolio includes RF/microwave electronic design automation (EDA)...

May 26, 2016

Q&A: After 40 Years, NI's “One Thing” Still Going Strong(er)

Electronic Design Q&A: After 40 Years, NI's “One Thing” Still Going Strong(er) Electronic Design In the four decades since its founding, the company has grown in value to over $3.5 billion and its technology...

May 25, 2016

Using Scanning Microwave Impedance Microscopy for Nanoscale Mapping of Permittivity and Conductivity

AZoNano Using Scanning Microwave Impedance Microscopy for Nanoscale Mapping of Permittivity and Conductivity AZoNano The reflected microwave signal arising from the tip-sample interface is sent back inside the circuit...

May 25, 2016

Tower Debuts RF Process For IoT Front Ends

Tower Debuts RF Process For IoT Front Ends EE Times LONDON--Specialty foundry Tower Semiconductor Ltd. (Migdal Haemek, Israel) has said it has begun mass production of a silicon-germanium process tailored to meet the...

May 24, 2016

Is America finally ready for smart guns?

PBS NewsHour Is America finally ready for smart guns? PBS NewsHour But Mossberg's Florida-based company, iGun Technology Corp., has never scaled the high-tech components to a handgun. And cultural and ... Gun...

May 17, 2016