An RF amplifier, often called the low-noise amplifier (LNA). Its primary responsibility is to increase the sensitivity of the receiver by amplifying weak signals without contaminating them with noise, so that they can stay above the noise level in succeeding stages. It must have a very low noise figure (NF).
What is meant by RF front end?
The RF Front end is the generic name for all the circuitry between a receiver Antenna input up to the Mixer Stage. For most architectures, the RF Front End consists of: An RF Filter (which is actually a band-pass filter) receives the Electromagnetic wave from the Antenna.
What does a front end module do?
Front End Modules (FEM) allow the supply of all front-end components as one assembled-to-design system by the customer assembly plant.
What is RF front end IC?
An RF front end is a device or module that incorporates all the circuitry between the antenna and at least one mixing stage of a receiver and possibly the power amplifier of the transmitter. They are used in a wide variety of RF products and applications.
What is front end gain?
This is typically equal to the active gain of the antenna’s LNA subtracted by the loss expected from coaxial cables, splitters, DC blocks or any other RF devices between the antenna and receiver.
What is RF front end and back end?
It mentions RF front end manufacturers or vendors. The difference between RF front end and back end is also covered. The figure-1 depicts typical components in a wireless transceiver unit. As shown it consists of two parts baseband and RF. The baseband part involves modem (modulator and demodulator).
Why IF frequency is 455 kHz?
Therefore, 455 kHz was chosen because it is not possible to have stations separated by that amount in either system: 455/10 = 45.5 and 455/9 = 50.555. This is the highest frequency less than 500 kHz for which this is true.
What is meant by the front end of a receiver and its primary functions?
• The primary function of the front end of a receiver or RF section are detecting, band. limiting, and amplifying the received RF signals.
What is front end amplifier?
The front end consists of two parts: the driving amplifier and the RC filter. The amplifier conditions the input signal—as well as acting as a low-impedance buffer between the signal source and the ADC input.
What are RF filters used for?
RF filters are electronic components that are used to allow or prevent selected signals or frequencies in order to eliminate noise or pass through of unwanted signals.
What is analog front end IC?
An Analog Front-End (AFE) is a semiconductor device that is used for signal conditioning that is comprised of analog amplifiers, op amps, filters, and integrated circuits. This configurable functional block is used to interface with a variety of sensors.
What RF means?
Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 gigahertz (GHz) to as low as 9 kilohertz (kHz).
What’s the most important component in RF circuit?
As with low-frequency devices, the fundamental active component in RF integrated circuits is the transistor.
Why is intermediate frequency required?
The main reason for using an intermediate frequency is to improve frequency selectivity. In communication circuits, a very common task is to separate out, or extract, signals or components of a signal that are close together in frequency. This is called filtering.
What RF means?
Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 gigahertz (GHz) to as low as 9 kilohertz (kHz).
What is the function of RF?
An RF module (short for radio-frequency module) is a (usually) small electronic device used to transmit and/or receive radio signals between two devices. In an embedded system it is often desirable to communicate with another device wirelessly.
What are RF filters used for?
RF filters are electronic components that are used to allow or prevent selected signals or frequencies in order to eliminate noise or pass through of unwanted signals.
How does RF module work?
This RF module is a combination of RF Transmitter and RF Receiver. The transmitter/receiver (Tx/Rx) pair operates at a frequency of 433 MHz. The RF transmitter receives serial data and transmits it wirelessly through through its RF antenna. The transmission occurs at the rate of 1 Kbps – 10 Kbps.
What is a RF transceiver?
RF Transceiver ICs are semiconductor devices that consist of a transmitter and a receiver in a single package. Transceivers are designed to function proficiently within an RF family or standard such as AISG, Bluetooth, ISM, VHF, Wi-Fi, cellular, RADAR, 802.15. 4 and Z-Wave.
What is RF and IF signal?
An RF (or IF) mixer (not to be confused with video and audio mixers) is an active or passive device that converts a signal from one frequency to another. It can either modulate or demodulate a signal. It has three signal connections, which are called ports in the language of radio engineers.
Why it is called superheterodyne receiver?
This is the same effect that Fessenden had proposed, but in his system the two frequencies were deliberately chosen so the beat frequency was audible. In this case, all of the frequencies are well beyond the audible range, and thus “supersonic”, giving rise to the name superheterodyne.
What are the different components of an optical receiver?
5.1 Optical Receiver Design An optical receiver system converts optical energy into electrical signal, amplify the signal and process it. Therefore the important blocks of optical receiver are – Photo detector / Front-end – Amplifier / Liner channel – Signal processing circuitry / Data recovery.
