Title :
Characteristics of biconical microstrip antennas
Author :
Lin, Y. ; Shafai, L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
Abstract :
Characteristics of biconical microstrip antennas asymmetrically excited by a coaxial probe feed are studied. The antenna consists of a conducting cone cap on a grounded cone separated by an electrically thin dielectric. A study of the theta -dependent eigenvalues nu of the spherical wave functions in the omega direction has shown that there is a unique nontrivial eigenvalue for each TE (transverse electric) mode, and for the TM (transverse magnetic) modes all eigenvalues are trivial solutions. Their input impedance, bandwidth, and radiation patterns for different grounded cone angles are presented. The analysis of the conical microstrip antenna, the special case of these antennas, where the grounded core becomes a plane, predicts that their bandwidth is wider than that of similar-size planar circular disc antennas.<>
Keywords :
antenna radiation patterns; eigenvalues and eigenfunctions; electric impedance; microstrip antennas; TE modes; TM modes; bandwidth; biconical microstrip antennas; coaxial probe feed; conducting cone cap; conical microstrip antenna; electrically thin dielectric; grounded cone; input impedance; radiation patterns; spherical wave functions; theta -dependent eigenvalues; Antenna feeds; Bandwidth; Coaxial components; Dielectrics; Eigenvalues and eigenfunctions; Magnetic separation; Microstrip antennas; Probes; Tellurium; Wave functions;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.174974
