![]() ![]() Möbius recommended readingīefore going further, add these resources to your reading list. The center conductor of each coaxial arm is connected to the shield of the opposite arm. Definition of Möbius loop (aka Mobius, Moebius)Ī Moebius loop magnetic field sensor is a circular loop consisting of two solid-shielded 50 ohms coaxial ”arms”, which are split at the top to form a very small gap compared to the loop dimensions. The subtle crossover refinements in the Airspy YouLoop beg further review. It doesn’t seem such a simple antenna configuration would provide any usefulness beyond being an inductive feed loop for a larger antenna assembly. Both approaches directly short the antenna feed point at dc. The crossover approach performs an inner to outer swap. The conventional approach merely passes the inner conductor through to the other side. ![]() The slight wiring change in the open gap highlights the only difference between the two configurations. Directly opposite this gap is the antenna feedpoint shown here with a broadband transformer serving the role of balanced to unbalanced converter. Both share a gap in the outer conductor at the top of the loop. This discussion focuses on a single-turn small loop antenna comprised of a hollow conductor arranged in a closed shape, such as a circle, with an insulated conductor within. This contrasts with tuned loop LF/MF aerials where a capacitor in parallel with the inductance of a multi-turn loop makes for a very selective, narrow band, and likely more efficient, receive antenna. ![]() Both this and the popular “gapped” loop configuration are very broadband in nature as testing results, shown below, confirm. The YouLoop uses the crossover Möbius configuration inspired by August Ferdinand Möbius. Scroll down to his figures 24A-E to acquaint yourself of the various forms of small “shielded” loops. Frank Dörenberg (N4SPP) provides an excellent discussion of the small loop as it relates to driving small transmitting loop antennas… The YouLoop’s design derives from a class of electrically small antennas generally called Shielded Loop antennas. Can the YouLoop give satisfactory performance for MF and LF band reception? Small loop background In a world of +$200 small loop antennas that utilize relatively thick and hearty aluminum or copper tubing, the thin coax that makes up the actual loop appears to be a strategic compromise. ![]() The YouLoop is available at an affordable $30-40 US. Our construction toys are put together using magnets which makes them more fun for young toddlers and preschool-aged childrenĮarly Learning and STEM Challenges: The science and technology behind our magnetic construction toys inspires critical thinking, builds hand-eye coordination, promotes pattern recognition, increase visual perception skills, and much moreĮndless Colorful Exciting Hands-On Designs: The MOBIUS Toys kid’s construction toys play set with step-by-step instructions lets kids snap-together 19 different toy construction trucks which gives them tons of different options for building and playing for hours of engaging, hands-on funĬreate a Large Play Area: The addition of the 31.5" x 27.The YouLoop small loop antenna is a recent addition to the product line from Airspy. Active Magnetic Vehicles Playset: This 72-piece set includes a large play mat, 16 road signs, and 55 STEM parts to create endless colorful models. ![]()
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