FDTD diakoptic design of a slot-loop antenna excited by a coplanar waveguide

Acompact slot loop antenna is designed in this paper. Here a curved slotline loop, coplanar waveguide fed to slotline transition balun and short-end coplanar matching network are all analyzed piecewise by a three dimensional FDTD method working on a diakoptics basis. The symmetric feature of the circuit is explored and a new multiple excitation technique is employed to aid analysis. Measurement results show that the FDTD diakoptics design technique is accurate and offers potential for mixed geometry or high resolution problems which must be decomposed into smaller subelements which are more convenient from a computational perspective.