Questions & Answers on Amplifier

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What is a TWT Amplifier?

Oct 12, 2020

A Traveling-Wave Tube or TWT Amplifier is a high power, high-frequency amplifier that is built using traveling wave tubes. A traveling-wave tube is a type of vacuum tube used to amplify high-frequency...read more

VSWR and its Effects on Power Amplifiers

Amplifiers

Editorial Team

Exodus Advanced Communications

VSWR – Voltage Standing Wave Ratio is a result that happens from having an impedance mismatch between a source (an amplifier) and a load (test application). This mismatch can influence the perfo...read more

What is Power Backoff in an Amplifier?

Amplifiers

Editorial Team

Dec 12, 2019

When a power amplifier (PA) is fed with a multi-tone signal at its input, it amplifies the signal and in the process generates unwanted intermodulation (IM) products. When the amplifier is operat...read more

What are Bidirectional Amplifiers?

Amplifiers

Editorial Team

Jul 22, 2019

A Bi-directional amplifier is a device that supports two-way communications and amplifies the signal in both transmit and receive mode. It consists of a power amplifier (PA) at the transmit end and a ...read more

Small Signal Gain vs Large Signal Gain in an Amplifier

Amplifiers

Editorial Team

Nov 29, 2019

If we draw the Input power vs Output power for an amplifier on a graph, we can see that for a specific frequency range the output power of the amplifier is proportional to the input power (initially) ...read more

What is a Detector Log Video Amplifier (DLVA)?

Amplifiers

Raghav Kapur

everything RF

A Detector Logarithmic Video Amplifier (DLVA) consists of a detector followed by a logarithmic video amplifier (LVA). The detector converts the RF energy into a DC voltage which is then amplified...read more

What is a Limiting Amplifier?

Amplifiers

Peter McNeil

May 8, 2018

In many microwave circuits, especially receiver circuits, there is a limit to the amount of signal power that the circuit can handle before causing undesirable operation, damage, or destruction of the...read more

What are Klystron Power Amplifiers?

Amplifiers

Editorial Team

Dec 16, 2019

A vacuum tube that amplifies microwaves by controlling the speed of electrons flowing in a straight line with the help of a magnetic field is called Klystron. An amplifier that uses the klystron vacuu...read more

What is a SDLVA - Successive Detection Log Video Amplifier?

Amplifiers

Raghav Kapur

everything RF

An SDLVA (Successive Detection Logarithmic Amplifier) is similar to a DLVA (read about DLVAs here), however, the SDLVA circuit is designed in such a way that it does not need a det...read more

What are Load Pull Measurements?

Amplifiers RF Basics

Editorial Team

Jun 5, 2021

Load Pull is a technique that measures the characteristics of a device while modifying the load impedance using an impedance tuning system. The objective of carrying out load pull measurements is to i...read more

What is Pulse Shaping?

Amplifiers

George Bollendorf

Dec 21, 2017

Pulse shaping, as it is done today, is an effort to fix fidelity issues caused by the transmitting amplifier since high power amplifiers do a poor job duplicating the input signal without distortions....read more

What are Octave Band Amplifiers?

Amplifiers

Editorial Team

May 5, 2019

Broadband RF amplifiers operate over a frequency range. When the upper frequency of an amplifier is double the lowest frequency, it is known as an octave band amplifier. So for example if an amplifier...read more

What is SOMAP?

Antennas SATCOM Satellite

Editorial Team

Jan 13, 2020

SOMAP or “Set of Minimum Antenna Performance” Requirements is a set of minimum performance criteria, designed for satellite antenna manufacturers to maintain uniformity across industries w...read more

What is the difference between P1dB and Saturated Power in an RF Amplifier?

Amplifiers RF Basics

Answer

What are Cryogenic Amplifiers?

Amplifiers Cryogenic Components Quantum Computing

Editorial Team

Nov 23, 2017

Cryogenic Amplifiers are those that can operate at very low temperatures. Temperatures are considered to be Cryogenic when they are below -180 °C or 93.15 K or -292.00 °F. Typical applications fo...read more

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