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# Series: Wideband Magnetic Loop Theory

Design of a wideband magnetic loop active antenna is different from traditional tuned loops. Find out how and why. We also provide an LTSpice model of an equivalent circuit.

# Electromagnetic Waves Work

While avoiding Maxwell’s Equations, we need a basic understanding of how electromagnetic waves work. We can’t live without them.  Read more

# Magnetic Loop Performance as Transducers

You will find a lot of confusion about magnetic loop performance, in particular about how they work differently from normal antennas. Let’s dig in.  Read more

# Wideband versus Narrowband Mag Loops

Once and for all, let’s understand wideband versus narrowband mag loops. It’s a case of open and closed, circuits that is.  Read more

# Magnetic Loop Equivalent Circuit

Your magnetic loop equivalent circuit is the engine under the hood for simulating the performance of an entire wideband active loop antenna. Here’s what it looks like.  Read more

# Tuned Loops Magnify Voltages

Tuned loops magnify voltages like magic. We need to understand how tuned loops work before moving on to un-tuned or wideband loop antennas.  Read more

# Constant Current Loops – Fact or Fiction

Magnetic loop antennas are often called constant current loops, which means received signals provide a uniform current flow around the entire loop. Is this assumption realistic?  Read more

# Magnetic Loop Voltage – Inducing a Signal

Whether we are using an actual magnetic loop antenna or simulating an equivalent circuit, we need to understand how a signal voltage develops across the loop. Where does it come from?  Read more

# How Wideband Loops Work – Keeping Current

Wideband loops work by extracting signal current independent of frequency. You will find the theory completely different from traditional tuned loops.  Read more

# LTSpice Magnetic Loop Model

You can experiment with wideband magnetic loop design with the LTSpice Magnetic Loop Model. Download here.  Read more