Once and for all, let’s understand extraordinary wave propagation on HF. Why does it happen and what does it mean to us? Read more
Tag: propagation
Our Magnetic Field Effects Skywaves
Recently, I wrote about how our magnetic field effects skywaves polarization, turning everything elliptical. Let’s dig deeper. Read more
HF Skywave Polarization – Not What You Think
All shortwave signals arriving at your receiver have elliptical polarization. HF skywave polarization is simply not what you think it is. Read more
Radio Propagation Basics in 2022
I spent some time writing about radio propagation basics in 2022. Unlike electronic circuits, sending signals through the ionosphere is really complex. Read more
SWL Best Time of Day for Listening
What is the SWL best time of day for listening to your radio? There is no complete answer, but here are some clues. Read more
D Layer Absorption – Big Radio Sponge
Ionospheric D Layer absorption attenuates radio signals, mainly below 10 MHz. Here is how it is caused and when. Read more
Why Ionosphere Virtual Height is Important in HF Propagation
You have probably heard people talk about ionosphere virtual height. What is it and why is it important for HF propagation? Read more
Oblique Radio Rays Bend Back to Earth
So, how exactly do oblique radio rays bend as they transit the ionosphere and return to earth? Let’s find out. Read more
Radio Wave Refraction in the Ionosphere
Radio wave refraction depends on density of free electrons and frequency. Skip distance is tied to refractive index and height. Read more
Understand Radio Waves in Various Media
Let’s understand radio waves, and how they behave is different media including solid wire, free space and plasma. Read more