The fascinating science of radio wave propagation is explored, demystifying how these invisible waves travel through the air and interact with antennas. We will explore the fundamental concepts
Important specifications of an electret microphone are its directivity, sensitivity and signal to noise ratio. Directivity is the directionality or polar pattern and indicates how sensitive it is
A repeater is a combination of a receiver and a transmitter that receives signals and retransmits it so as to cover a longer distance. Usually repeaters are located
Genetic antennas are also known as evolved antennas and they often resemble paper clips bent in different ways and connected to a radiofrequency connector. Unlike usual antennas which
Looking at the spectrum of digital signals which are usually seen on amateur radio bands. Demonstrating how to adjust the span so that the width of the signal
Electrets are the electrostatic equivalents of permanent magnets. While a permanent magnet has two magnetically charged poles, an electret has two electrically charged ends. It has internal and
Listened to the downlink frequency of the cross band repeater on International Space Station just now. It was an 80 degree maximum elevation visible pass in my region.
Supercapacitors are also known as ultracapacitors. They are high value capacitors much above the usual electrolytic capacitors which we use in our hobby electronics projects. As an example,
