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

Multi-GHz RF Switches Leverage Silicon-Based MEMS IC Technology

Electronics360 Multi-GHz RF Switches Leverage Silicon-Based MEMS IC Technology Electronics360 ... more benign automatic test equipment (ATE) installations. The ADGM1304 and ADGM1004 implement contact-based (not...

Jan 6, 2017

Will the iPhone 8 be TRANSPARENT? Apple is granted a patent for a see-through display

Daily Mail Will the iPhone 8 be TRANSPARENT? Apple is granted a patent for a see-through display Daily Mail 'The signals may include acoustic signals, electromagnetic signals such as radio-frequency...

Jan 12, 2017

iPhone 8 to have stainless steel frame, all glass front and back and 'invisible' speakers and cameras

Daily Mail iPhone 8 to have stainless steel frame, all glass front and back and 'invisible' speakers and cameras Daily Mail 'The signals may include acoustic signals, electromagnetic signals such as...

Jan 10, 2017

Resonators

Resonators - Market Drivers and Forecast from Technavio Business Wire (press release) Resonators are a crucial component of any electronic device, and with the growing demand for new age electronic devices the demand...

Dec 30, 2016

Update: Apple says no plans to manufacture products at Mesa, Arizona site

TechCrunch Update: Apple says no plans to manufacture products at Mesa, Arizona site TechCrunch Its annual supplier report lists 69 manufacturing facilities in the US, with US-based companies supplying components...

Jan 10, 2017

WIPL-D EM Technology Added To NI AWR Software Alliance Partner Program As An OEM Supplier

WIPL-D EM Technology Added To NI AWR Software Alliance Partner Program As An OEM Supplier RF Globalnet (press release) The NI AWR Design Environment software portfolio includes RF/microwave electronic design automation...

Jan 4, 2017

Seven from MIT are named 2017 IEEE Fellows

Seven from MIT are named 2017 IEEE Fellows MIT News Recently, this team has been working to develop electronic -photonic integrated circuits that combine novel SCOWA components , conventional photonic components...

Jan 5, 2017

Vintage Radio: The 'All American Five'

WSHU Vintage Radio: The 'All American Five' WSHU Several factors contributed, including the trend towards miniaturization of tubes and other components , but primarily a circuit , which would become known as...

Dec 23, 2016

UCSB researchers demonstrate chip-scale optical frequency synthesis

Compound Semiconductor UCSB researchers demonstrate chip-scale optical frequency synthesis Compound Semiconductor The UCSB team designed an integrated heterodyne optical phase-locked loop with an InP based photonic...

Jan 11, 2017

Radio Frequency Front End Module Market

Radio Frequency Front End Module Market - Increase In Next-Generation Wireless Networks Drives Growth RF Globalnet (press release) In a superheterodyne radio receiver, the circuit between antenna and mixer is generally...

Dec 28, 2016

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