Questions & Answers on Antenna

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What is the difference between EIRP and ERP?

Antennas RF Basics

Editorial Team

May 22, 2018

EIRP is the Effective isotropic radiated power is the total power radiated by a hypothetical isotropic antenna in a single direction. It gives the signal strength in the direction of the antenna's str...read more

What is MU-MIMO?

Technologies Wi-Fi

Editorial Team

Jul 7, 2019

MU-MIMO (multi-user, multiple input, multiple output) is a wireless technology that allows a single access point to simultaneously communicate with multiple devices to improve overall efficiency. MU-M...read more

What is a Yagi Antenna?

Antennas

Editorial Team

May 4, 2022

A Yagi antenna or a Yagi-Uda antenna, is a directional antenna that radiates signals in one main direction. It consists of a long transmission line with a single driven element consisting of two rods ...read more

What is a Phased Array Antenna?

Antennas

Editorial Team

Jun 27, 2020

Phased Array Antennas are antenna arrays that have the unique ability to change the shape and direction of the radiation pattern without physically moving the antenna. Elements in an antenna array are...read more

What is Front to Back Ratio in an Antenna?

Antennas

Editorial Team

Oct 6, 2018

The Front to Back Ratio (F/B Ratio) of an antenna is the ratio of power radiated in the front/main radiation lobe and the power radiated in the opposite direction (180 degrees from the main beam).This...read more

What are Sector Antennas?

Antennas

Editorial Team

Jul 26, 2017

A sector antenna or "sector panel" is a directional antenna for outdoor applications. They are most often used by Base-Stations and can be seen, hung on cell phone towers. They are long, nar...read more

What is Half Power Beam Width (HPBW)?

Antennas

Editorial Team

Jan 23, 2021

Half Power Beam Width or HPBW is an angular width (in degrees), measured on the major lobe of an antenna radiation pattern at half-power points i.e the points at which the signal power is half that of...read more

How do you measure Antenna Gain?

Antennas

Glenn Robb

Jun 21, 2017

While antenna simulations can be an accurate predictor of gain, and duplication of known antennas can produce clones with predictable gain, these methods do not actually measure antenna gain. There ar...read more

Understanding Antenna Polarization

Antennas

Editorial Team

Aug 29, 2018

A radio wave is made up of both electric and magnetic fields. In free space, the electric and magnetic fields are mutually perpendicular and are also perpendicular to the direction of propagation. The...read more

Log-Periodic Antennas vs Yagi Antennas

Antennas

Editorial Team

Jul 26, 2017

Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are phy...read more

What are the different types of antenna polarization?

Antennas

Peter McNeil

Jan 5, 2018

The most common types of antenna polarization are vertical, horizontal, right hand circular, or left hand circular, and antenna polarization is a critical aspect of antenna performance. The polarizati...read more

What is a Lens Antenna?

Antennas

Editorial Team

Sep 19, 2018

A lens antenna uses the convergence and divergence properties of a lens to transmit and receive signals. These antennas consist of a dipole or horn antenna followed by a lens. The size of the lens use...read more

What is a Collinear Antenna?

Antennas

Editorial Team

Aug 13, 2018

In geometry, a set of points are collinear to each other if they lie on a single line.In telecommunications, when two or more dipole antennas are vertically stacked in such a way that their correspond...read more

What is Axial Ratio of an Antenna?

Antennas

Editorial Team

Jan 22, 2021

The Axial Ratio (AR) of an antenna is defined as the ratio between the major and minor axis of a circularly polarized antenna pattern. If an antenna has perfect circular polarization then this ratio w...read more

What is Cross Polarization?

Antennas

Editorial Team

Jan 22, 2021

Cross Polarization is the polarization orthogonal to the desired polarization. For instance, if the fields from an antenna are meant to be horizontally polarized, the cross-polarization in this case i...read more

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