RFID (Radio-Frequency Identification) is a technology that uses radio waves to identify and track objects, typically through a RFID tag or RFID card, which is a small device that contains a microchip and an antenna. The RFID reader/writer, also known as an RFID interrogator, emits radio waves and receives signals from the RFID tag or card, which allows it to read and write data to the tag or card.
RFID cards typically have a unique identification number that can be used for various purposes, such as access control, inventory management, and asset tracking. They can be passive, which means they have no power source and rely on the energy from the RFID reader to function, or active, which means they have a power source and can transmit a signal back to the reader.
RFID readers come in various forms, including handheld readers, fixed readers, and mobile readers. They can be connected to a computer or other device to allow for data transfer and can be integrated into various systems, such as access control systems, security systems, and inventory management systems.
There are two main types of RFID technology: Low-Frequency (LF) and High-Frequency (HF) RFID. Low-Frequency RFID operates at a frequency of 125-134 kHz and has a shorter read range (typically less than 1 meter) while High-Frequency RFID operates at a frequency of 13.56 MHz and has a longer read range (typically up to 4 meters).
RFID technology has many advantages over other identification technologies, such as barcodes. RFID tags can be read through various materials and at a distance, which makes them useful for tracking items in a warehouse or inventory. RFID tags are also more durable than barcodes and can withstand harsh environments.
However, RFID technology also has some disadvantages. RFID tags can be expensive to produce, and RFID readers can be expensive to purchase. RFID systems also require a certain level of technical knowledge to set up and maintain, which can be a barrier to some organizations.
In summary, RFID cards and RFID readers/writers are technologies that use radio waves to read and write data to a small device called RFID tag or card. They are used in various applications such as access control, inventory management, and asset tracking. RFID readers come in different forms, and there are two main types of RFID technologies: Low-Frequency (LF) and High-Frequency (HF) RFID. RFID technology has advantages over other identification technologies but also has some disadvantages.