Online S-parameter viewer

Online S-parameter viewer Use the S-parameter viewer to view your S-parameter files, produce good-looking graphs, and save them as a PNG image. Go to S-parameter tool Features The S-parameter tool has the following features Reads S-parameter files; supports DB, MA and RI formats Creates professional S-parameter graphs Auto scaling with manual overrides Customizes charts with legends, axis labels, and titles Exports charts to PNG image files Adjusts width and height of the PNG file Online web-based tool designed f [...]  Read more >

Everything You Should Know About Return Loss Measurements Using a Directional Coupler

Everything You Should Know About Return Loss Measurements Using a Directional Coupler Contents 1. Introduction 2. Theory 3. Measuring reflection with a directional coupler 4. Applications 5. Conclusions 1. Introduction Return loss is an important parameters of any RF (Radio Frequency) device. It is a measure of the amount of power reflected at a port. From it, impedance levels can be calculated and amplitude variations in transmission lines predicted. For one port devices, it is the only existing scattering parameter too! Usually, return loss is measured using a directional coupl [...]  Read more >

Overview of RF Power Splitters, Combiners, Couplers and Hybrids

Overview of RF Power Splitters, Combiners, Couplers and Hybrids The landscape of power splitters, combiners, couplers and hybrides can be daunting at first glance. However, when we classify these devices according to their functions and take the different kinds of operating principles into account, the pictures becomes clear. To assist the RF engineer in choosing the right device for the job, we constructed an overview of these devices. 1. A Simple Model of RF Power Splitters, Combiners and Couplers In this article, we choose to look at all devices as three-port model [...]  Read more >

Modeling Devices with S-parameters

Modeling Devices with S-parameters Scattering parameters or S-parameters for short, are the standard way to describe the behaviour of all kind of RF modules. Both passive and active. So, what are these parameters and why are they so popular? In order to fully grasp the full potential of S -parameters, it is useful to lay down some basic concepts first. (Note: some understanding of transmission line theory is helpful when reading this article) 1. S-parameter basics The basic idea behind S-parameters is to look at a device (or more generall [...]  Read more >

When Should I use a DC Block in RF Applications?

When Should I use a DC Block in RF Applications? Sometimes it is necessary to block the DC component in a RF signal. There are two main reasons to do so. The first one is to protect equipment or components that can't handle DC signals without damaging them. The second reason is to improve measurement accuracy. 1. Function of DC-blocks in RF applications 1.1 Protection The most obvious function of a DC-block is to protect components that can't stand DC voltages. For example, a mixer that uses a transformer at its input, as many do! If such a component i [...]  Read more >
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