SMA connector performance in the RF Enclosure Mini used as a PCB test fixture

SMA connector performance in the RF Enclosure Mini used as a PCB test fixture One of the most common reasons to use an RF enclosure from the Gquipment Mini series is to house some RF/microwave PCB to create an RF module with some specific function. To evaluate the design criteria of this function, one must measure the RF module—for example, by measuring its S-parameters with a VNA using the RF ports of the RF Enclosure Mini. Then, the RF PCB is the DUT, and the RF Enclosure Mini is used as a test fixture. Of course, the influence of the RF ports should be minimal; however, in practi [...]  Read more >

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 >

Power Splitters, Combiners, Couplers and Hybrids: A Taxonomy

Power Splitters, Combiners, Couplers and Hybrids: A Taxonomy 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 a taxonomy of these devices. 1. Some Constraints to Consider First In this article, we choose to look at all devices as three-port models. Because, in most cases, [...]  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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