Quarter-Wave Antennas Explained: The Missing Half of the Antenna

Have you ever wondered why quarter-wave antennas are used on everything from amateur radio systems to public safety networks, vehicles, marine radios, and countless wireless devices? At first glance, a quarter-wave antenna seems incomplete. After all, it's only one-quarter wavelength long. So where is the other half? In this video, we explore the physics behind quarter-wave antennas, including: • The missing-half concept • Ground planes and radial systems • RF current return paths • Resonance and standing waves • Current and voltage distribution • Feedpoint impedance • Why sloping radials raise impedance toward 50 ohms • Mobile antennas and vehicle ground planes • Why quarter-wave antennas remain one of the most popular antenna designs ever created Whether you're new to antenna theory or an experienced radio operator, understanding how quarter-wave antennas work will help you better understand many other antenna designs. If you enjoy these antenna theory videos, please consider liking the video and subscribing for future content. #antenna #hamradio #amateurradio #rf #antennatheory .............................................................................. Learn more about Telecommunications! Get my ebook "Telecommunications Simplified" here: https://amzn.to/3WsNpbF