Theoretical and experimental study of a quasi-planar conical antenna

Conical antennas are widely used in many applications because of their broad input impedance bandwidth and omni-directional radiation pattern (H.Hawasaki and G.Sato). However, conical antennas usually have three-dimensional structures and are, hence, relatively difficult to fabricate and integrate. In (M.Lu,et al), a quasi-planar conical antenna is proposed, where preliminary results indicate that dielectric loading could mechanically stabilize the antenna while keeping the input impedance invariant within a broad band. In this paper, the antenna design proposed in (M.Lu,et al) is studied theoretically as well as experimentally. Specifically, a few configurations of the quasi-planar conical antenna are simulated, fabricated, and tested. The simulation and measurement results show good agreement. Overall, the findings are that the quasi-planar conical antenna is mechanically stable, straightforward to fabricate and manipulate, and that it exhibits all of the nice electrical properties of the conventional conical antennas.