DUAL-FREQUENCY EQUILATERAL-TRIANGULAR MICROSTRIP ANTENNA WITH A SLIT

Dual-frequency operation of a single-feed equilateral-triangular micro strip antenna with a slit is demonstrated. Typical designs of the prop osed antenna with the frequency: ratio of the two operating frequencie s ranging form 1.201 ro 1.563 are implemented and analyzed it is found that, for a fixed dual-frequency operation, the proposed antenna can have a much smaller patch size (less than 50%) than that required by t he design using a regular rectangular microstrip antenna. Details of t he antenna design are described, and experimental results of the dual- frequency performance are presented and discussed. (C) 1998 John Wiley & Sons, Inc.