Loading Coils

Loading Coils

A loading coil or load coil is an inductor that is inserted into an electronic circuit to alter its electrical characteristics, such as its electrical length, resonance frequency, and increase its inductance. The term originated in the 19th century for inductors used to prevent signal distortion in long-distance telegraph transmission cables. The term is also used for inductors in radio antennas, or between the antenna and its feedline, to make an electrically short antenna resonant at its operating frequency.

Loading coils are typically used when space limitations or other practical constraints make it difficult to install a full-sized antenna.

While loading coils can be beneficial in certain situations, they do come with some trade-offs, including reduced bandwidth and increased losses due to the additional electrical components.

Images

Pasted image 20231103153749.png|300

Loading Coils