Search results
Results from the WOW.Com Content Network
Radio-frequency induction (RF induction) is the use of a radio frequency magnetic field to transfer energy by means of electromagnetic induction in the near field. A radio-frequency alternating current is passed through a coil of wire that acts as the transmitter , and a second coil or conducting object, magnetically coupled to the first coil ...
The interface dimensions for SMA connectors are listed in MIL-STD-348. [5] The SMA connector employs a 1 ⁄ 4 inch diameter, 36-thread-per-inch threaded barrel. The male is equipped with a hex nut measuring 5 ⁄ 16 inch (0.3125 inch / 7.9 mm) across opposite flats, thus taking the same wrench as a #6 SAE hex nut.
The RFID Network responded to these fears in the first episode of their syndicated cable TV series, saying that they are unfounded, and let RF engineers demonstrate how RFID works. [147] They provided images of RF engineers driving an RFID-enabled van around a building and trying to take an inventory of items inside.
The UHF connector [4] is a name for a fairly common, but old type of threaded RF connector. [5] [6] The connector design was invented in the 1930s for use in the radio industry. [7] [4] It is a widely used standard connector for HF transmission lines on full-sized radio equipment, with BNC connectors predominating for smaller, hand-held ...
An RF switch or microwave switch is a device to route high frequency signals through transmission paths. RF (radio frequency) and microwave switches are used extensively in microwave test systems for signal routing between instruments and devices under test (DUT). Incorporating a switch into a switch matrix system enables you to route signals ...
For instance, it may also allow radio-frequency-based (RF) remotes (including those using Bluetooth) to control infra-red-based components. It may also allow one device to control another: A recording device, such as a DVR or VCR, might change the channel on an external tuner (such as a cable box or satellite television receiver). This way, the ...
IF amplifiers in heterodyne receivers apply gain in a frequency band between the input radio frequency and output audio frequency or video frequency, often following one stage of RF amplifier. This allows most of the gain in the form of a fixed-frequency amplifier, simplifying tuning. Compare to its predecessor, the tuned RF receiver.
Radio fingerprinting is a process that identifies a cellular phone or any other radio transmitter by the fingerprint that characterizes its signal transmission and is hard to imitate.