RF/IF & RFID definition

What is RFID Chip

RFID stands for "radio-frequency identification," and it refers to a technique in which a reader captures digital data contained in RFID tags or smart labels (described below) using radio waves. In the same way that data from a tag or label is taken by a device and stored in a database, RFID is analogous to barcoding. RFID, on the other hand, provides significant advantages over barcode asset tracking software. The most significant difference is that RFID tag data may be read without needing to be aligned with an optical scanner, whereas barcode data must be aligned with an optical scanner.

An RFID tag or smart label, RFID reader and  antenna are the three basic components of a RFID system. RFID tags commonly are made up of an integrated circuit and an antenna that transfer data to RFID reader (also called an interrogator). The radio waves are then converted to a more useable kind of data by the reader. The data acquired from the tags is subsequently sent to a host computer system through a communications interface, where it may be saved in a database and evaluated later.

RFID Tag

An integrated circuit and an antenna make up RFID tag. The tag is also made out of a protective substance that keeps the components together and protects them from the elements. The type of protective substance used is determined on the application. Employee ID badges with RFID tags, for example, are normally composed of tough plastic with the tag implanted between the layers. RFID tags can be passive or active and come in a range of forms and sizes. Because passive RFID tags are smaller and less expensive to apply, they are the most often utilized. Before passive tags may transmit data, the RFID reader must "power them up." Active RFID tags, unlike passive tags, include an integrated power source (such as a battery) that allows them to transmit data at all times.

RFID Reader

A radio frequency transmitter and receiver that can read and write information to RFID tag is known as RFID reader. RFID readers can be stationary or portable. RFID readers that are portable or mobile may be put or transported practically anyplace. Almost every Handheld RFID Reader on the market is available from Atlas.

Antenna

For wireless LANs, there are three basic antenna types: omnidirectional, semidirectional, and highly directional.

Highly directional - For point-to-point communications, such as between two buildings, highly directional antennas are employed. They are often employed because they emit a very narrow beam over a long distance.

Semidirectional Antennas - Semidirectional antennas are used to offer targeted signal coverage across broad regions. A Yagi antenna is an example of a semidirectional antenna.

Omnidirectional - An omnidirectional antenna radiates a signal in all directions. Although it is impossible for antenna to properly emit a signal at the same power due to the rules of physics, antenna of this sort attempts to offer general coverage. Because strong coverage in a general spherical region surrounding the antenna is desired in these cases, this is the most prevalent kind seen in client adapters and access points.

What if RF

RF, short for Radio Frequency, is used to measure the oscillation rate of electromagnetic radio waves or electromagnetic radiation spectrum. And the range of RF is from 300 GHz to 9kHz. Generally, antennas and transmitters are used to broadcast and communicate wireless audios with RF technology.

Hz, namely hertz, is the measurement unit of RF, which is used to represent the number of cycles per second, when a radio wave is transmitted.

How to Calculate RF Values

Maybe you often come the following problems: How to calculate RF values and what is formula for Rf value? At first, you should know the RF value definition. So what is the RF value? Please keep reading.

An RF value is a ratio of a solute's travel distance to that of a solvent. The distance traveled by the compound divided by the distance traveled by the solvent front gives the Rf value of a compound (both measured from the origin). And you can follow the below YouTube Video "Calculating RF values" to do RF values calculation.