Effect of Four Different Types of Loops in Presence of Conducting Cone

In this paper, the effect of four different types of loops—circular, semicircular, square loop, and semi-square loop in the presence of a conducting cone are presented. The isolated loop has very poor matching characteristics. In presence of a conducting cone, the mutual coupling between the loop and the conducting cone are responsible to improve the matching characteristics. Circular and square loops have the equal circumference (157 mm), whereas semicircular and semi-square loops have half the assigned circumference. Semicircular and semi-square loops also have unchanged matching characteristics. The measurement results are also proffered to validate the results. The radiation patterns are also shown for each loop antenna topology in presence of a conducting cone.