Many articles and video segments have been produced to demonstrate the use of magnetic loop antennas for amateur radio use. Ideally, a loop antenna is designed to be portable, easy to assemble, small enough to use when camping or operating in …

2024年11月30日 · Loop antennas come in various sizes and shapes, with very different characteristics. As we did with Loop Antenna Theory , we will them into the following types: small receiving loops , less than about 0.1 wavelengths, where the current is approximately constant around the loop.

This Article Discusses an Overview of What is Loop Antenna, Design, Working, Types, Radiation Pattern, Advantages & Its Applications.

A type of antenna which is formed by bending of a coil or uniform wire in the form of loop is known as a loop antenna. Basically, in this antenna the RF current-carrying coil is bent to various shapes like circle, square, rectangle, ellipse, etc.

2024年11月17日 · This study focuses on the design, construction, and evaluation of a 50 Ohm loop antenna for the 434 MHz band. Beginning with a full-wave round loop antenna, the design evolves into a 2:1 rectangular loop, with experiments conducted to assess prototype performance and the effects of material choices.

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.

Examples of practical application of small loop antennas include mobile pagers, NFC antennas, and as field strength probes used in wireless measurements. The loop antenna feed point does not matter too much - it can be anywhere along the loop perimeter.

This chapter has two goals, therefore: (1) to take a quick but comprehensive look at all the key factors needed to optimize a mag loop and (2) to present essential details of an example mag loop project, an optimized inexpensive foil tape and PVC pipe design.

2023年12月2日 · Let’s start with a simple square loop in free space, fed in the middle of one side, and see how the radiation pattern and other characteristics vary as we change the frequency (or change the length in wavelengths, which is the same thing).

2023年8月4日 · There are a few basic construction methods for wire loop antennas: None of these need to be particularly difficult to build, although multi-element versions at HF can be mechanically complex. Solid wire in the 1.5mm to 4mm (AWG #6 to AWG #14) range is often stiff enough to be used with minimal supports at VHF / UHF.