Cross polarization (sometimes written X-pol, in antenna slang) is the polarization orthogonal to the polarization being discussed. For instance, if the fields from an antenna are meant to be horizonta ...
How do NFC antennas work? This page will discuss that in a simple manner. We'll try to explain why NFC antennas aren't really antennas at all (like the dipole antenna or the Horn Antenna). But first, ...
The principle of operation of a Bazooka Balun is presented on this page. This balun adds a short-circuited sleeve around the coaxial cable, which somewhat resembles a bazooka, giving it the name.
The ...
Multipath is the arrival of a transmitted signal at a receive antenna from multiple paths due to reflections. The reflections can occur from the ground, trees, buildings, people, or whatever is around ...
A Balun is used to "balance" unbalanced systems - i.e. those where power flows from an unbalanced line to a balanced line (hence, balun derives from balance to unbalanced). As an example, consider ...
Maxwell's Equations are a set of four vector-differential equations that govern all of electromagnetics (except at the quantum level, in which case we as antenna people don't care so much). They were ...
The axial ratio is the ratio of orthogonal components of an E-field. A circularly polarized field is made up of two orthogonal E-field components of equal amplitude (and 90 degrees out of phase). Beca ...
The Magnetic Flux Density (or B-field) is related to the magnetic field (H) by the permeability (written as of the medium where the fields are observed:
The magnetic flux density has units of ma ...
The Antenna Factor is used by RF or EMC antenna engineers to describe the required electric field strength that produces 1 Volt at the terminals of an antenna. Alternatively, the Antenna Factor concep ...
Do you have a big job interview coming up? Are you curious about what type of questions you could expect for an antenna engineer interview? On this page, I'll hit up some of the topics that I consider ...
Supposing that you like the field of antennas and electromagnetics so much that you would consider doing it for a career, what types of opportunities are available?
Surprisingly, there are a good ...
Determining the fields for the TMz (Transverse Magnetic to the z direction) modes follows a similar procedure to that for the TEz case. To begin, we'll start by discussing the magnetic vector potentia ...
On the previous page, the z-component of the electric vector potential for the TE mode was derived:
Using the field relationships:
We can write the allowable field configurations for the T ...
In this section, we will take a mathematical look at waveguides and derive some of their key properties. We will again be concerned with metal (perfectly conducting) waveguides with a rectangular cros ...
Waveguides are basically a device ("a guide") for transporting electromagnetic energy from one region to another. Typically, waveguides are hollow metal tubes (often rectangular or circular in cro ...
