I'm looking for a design resource for circular folded dipole antennas such as the Stellar Labs omnidirectional FM antenna. It's a half-wave folded dipole antenna with the two halves bent to form a circular shape. I understand how a half-wave dipole or folded dipole works. But I need help understanding how forming the antenna into a circular shape affects the working of the antenna and its reception pattern. There are plenty of design resources online for standard folded dipole antennas. But I can't find any for the circular folded dipole.
Can someone please point me to an appropriate design resource? Thanks.
Can someone please point me to an appropriate design resource? Thanks.