HF Loop Antennas - ARRL
Three and a half to four foot loop antennas for several of the HF bands from 160- to 10-meters. A low-profile, compact antenna made from copper tubing and using a small D.C. motor to remotely tune the capacitor. Another loop for 20- through 10-meters using a novel "trombone slide" arrangement as a tuning capacitor.
Small Loop Antennas | DX Engineering
We’ve got magnetic and wire/PVC frame small loop HF antennas from CHAMELEON ANTENNA, as well as cross loop antenna kits from MFJ. Find your limited-space solution at DX Engineering today! Show Less
Characteristics of Small Loop Antennas for HF Operation. Coupling loop ≈1/5 diameter of main loop for good impedance matching on all bands. Antenna is narrowband, operating at resonance of loop L and tuning C.
Skywire Loop Antenna - full wave loop radio antenna - N1SU
The skywire loop is an excellent antenna - they can be a bit of work to get up in the air if you have a lot of obstacles (trees, xyl, etc.) but it is worth it. What's the right length? 574' feet for 160-15 meters (10 meters also, but with a short feedline).
This document describes how HF (13.56 MHz) antennas can be built and tuned so that their characteristics match the requirements of the Texas Instruments’ high performance S6000 and S6500 readers and third party RF modules.
Theory of Large Loop Antennas – Practical Antennas
2023年12月2日 · The 80m loop does make an effective multiband antenna that works reasonably well across all HF bands. On the higher frequencies the radiation pattern breaks up into multiple lobes: it can cover many directions, but with poorer performance in others.
DIY: How to build a Noise-Cancelling Passive Loop (NCPL) antenna
2020年4月5日 · I’ve gotten an number of inquiries from SWLing Post readers asking for a step-by-step guide to building the passive loop antenna I’ve mentioned in a number of previous posts. This antenna is the homebrew version of the commercially-available Airspy Youloop. It works a treat. And, yes, folks…it’s fun to build.
A magnetic loop antenna (MLA) can very conveniently be accommodated on a table top, hidden in an attic / roof loft, an outdoor porch, patio balcony of a high-rise apartment, rooftop, or any other tight space constrained location. A small but efficacious HF antenna for restricted space sites is the highly sort after Holy Grail of
Loop Antenna : Resonant Loop Antennas - The DXZone.com
The multi band HF loop antenna, a good performer on 80 and 40-10 meters. This excellent article covers all aspects of designing a resonant loop antenna, examining gain and radiation patterns, and describing practical notes on how to build this antenna.
CHAMELEON ANTENNA CHA F-LOOP 3.0 PLUS Portable HF Loop Antennas F LOOP ...
The CHA F-LOOP 3.0 PLUS is an easily deployable HF magnetic loop antenna with the practical advantage over a short vertical whip of being independent of a ground plane and earth for achieving efficient operation; this unique characteristic has profound significance for portable or restricted space antennas.
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