Magnetic loop for 3.5, 7, 14, 21 and 29 MHz
This small transmitting loop antenna is 1 meter high above average ground, so the radiation pattern is not donut-shaped as expected for a small loop in free space. The value of the tuning capacitor is indicated for each resonance frequency.
Large loop: 70 cm in diameter, RG-8 cable.
Small loop: 15 cm in diameter, RG-6 cable. Inductive coupling between the feedline and the large loop, spacing of 2 cm.
The color scale on the loops indicates the current flowing for a reference voltage of 1 V.
Download the project files from this link >.
Go to AN-SOF main menu > Run > Run Bulk Simulation and select the five “.nec” files to run the calculations automatically. You can do it with the trial version of AN-SOF.