Diamond NR770HBNMO vs. Comet M-24M

The Diamond Antenna NR770HBNMO paired with their K515S insulated luggage rack mount provides measurable and observable upgrade for my 2015 Subaru Forester 2m/440 mobile.

Radials mitigate feedline and mast currents, tests reveal

Radial Comparison Diamond Antenna X50NA

Antenna patterns from a Diamond X50NA reveal how radials of proper size mitigate current running down the feedline and mounting structure.

Decibel hell & the reign of antenna gain pain

A short history of antenna gain terminology and some guidance to muddle your way through some of the nefarious alternative facts you may encounter.

Of fields and feedpoints

Understanding how feed position along the half-wave dipole antenna affects the electric and magnetic fields around it.

Antenna pattern plots: Good intentions vs. good data

Just say no to handcrafted data graphs

In the 21st century should we believe antenna graphical gain data based on hope and hearsay? J-pole antenna gain drawings are a common bad example.

The dipole antenna, how industry defines it

All dipole antennas... according to the IEEE

Is a dipole antenna defined by its behavior alone or also how one energizes it? The answer exists in IEEE and historical literature.

Slim Jim vs. Traditional J-pole Antenna

Measured gain of SlimJIM and J-Pole

Real measurements of a Slim Jim antenna and traditional j-pole antenna reveal the truth about their respective gain and pattern.

Small Loop HF Antenna

With components from a variety of vendors, custom machining and a bit of trial and error, another variant of a small loop HF antenna is born.