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What is a Notch Filter?

Jul 25, 2021

A Notch Filter is also known as a Band Stop filter or Band Reject Filter. These filters reject/attenuate signals in a specific frequency band called the stop band frequency range and pass the signals ...read more

What is the difference between a Diplexer and Duplexer?

Filters

Editorial Team

Nov 28, 2016

A Diplexer is a 3-port passive device that allows two different devices to share a common communication channel. It consists of two filters (Low Pass, High Pass or Band Pass) at different frequencies ...read more

What is a SAW Filter?

Filters

Editorial Team

Apr 4, 2019

Surface Acoustic Wave Filters or SAW Filters are compact, low-cost RF filters that can be used in a wide range of applications up to 3 GHz. SAW filters operate by converting electrical energy int...read more

What is dBi?

Antennas RF Basics

Editorial Team

Jul 26, 2021

Antenna gain is measured in decibels. It is the ratio between the gain of the antenna compared to the gain of an isotropic antenna. An isotropic antenna is a theoretical antenna which radiates power u...read more

What is 3 dB Bandwidth of a Filter?

Filters

Editorial Team

Nov 4, 2019

An RF filter is used to block unwanted signals in a wireless system. It is designed to allow signals in a particular frequency range to pass through with minimal losses while blocking all other signal...read more

What is Group Delay?

Filters RF Basics

Editorial Team

Dec 2, 2018

All frequency components of a signal are delayed when they pass though a filter. Group delay in a filter is the time delay of the signal through the device under test as a function of frequency. If we...read more

What is Co-Channel Interference?

RF Basics Wi-Fi

Editorial Team

Apr 4, 2019

Co-channel interference or CCI exists when two or more devices are operating on the same frequency channel.Co-channel interference is not actually an interference but more a sort of congestion. It hin...read more

What is a BAW Filter?

Filters

Editorial Team

May 22, 2019

Bulk Acoustic Wave (BAW) Filters are compact, low-cost RF filters that can be used in a wide range of applications up to 6 GHz. Like SAW Filters, BAW filters also operate by converting electrical ener...read more

What is Saturated Output Power in an Amplifier?

Amplifiers RF Basics

Editorial Team

Jul 23, 2018

Saturated output power is the maximum output power you can get out from an amplifier. There are a few stages to amplifier operation - the first one is linear operation i.e this is the stage where the ...read more

What are pass band Ripples in a Filter?

Filters

Editorial Team

Dec 2, 2018

Ripples are the fluctuations (measured in dB) in the pass band, or stop band, of a filter’s frequency magnitude response curve. Elliptic and Chebyshev-based filters have constant ripple across their p...read more

What is Resolution Bandwidth?

Spectrum Analyzers Test & Measurement

Dr. Michael Simon, Application Support for Spectrum Analysis

Rohde & Schwarz

The Resolution Bandwidth (RBW) plays and important role in resolving signals that are close together in the frequency domain.The RBW defines the bandwidth of the IF filter in a heterodyne receiver, an...read more

What is the difference between dBi and dBd?

Antennas RF Basics

Editorial Team

Nov 29, 2016

What is a Triplexer?

Filters

Editorial Team

Jul 23, 2018

A triplexer is a 4-port filtering device that splits one input in to three different outputs each with a different frequency. It can also be used the other way round and where it routes signals at thr...read more

What is a Compact Range System?

Antennas Test & Measurement

Editorial Team

Aug 28, 2021

A Compact Range System or Compact Antenna Test Range (CATR) makes direct far-field measurements of electrically large antennas in a shielded anechoic chamber. It uses a large parabolic reflector to pr...read more

What is Analysis Bandwidth?

Spectrum Analyzers Test & Measurement

Dr. Michael Simon, Application Support for Spectrum Analysis

Rohde & Schwarz

The Analysis Bandwidth (ABW) is the instantaneous bandwidth of a spectrum analyzer that allows it to simultaneously record all frequency components within that bandwidth. On the other hand, the swept ...read more

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