VERY COMPACT AND BROADBAND PLANAR LOG-PERIODIC DIPOLE ARRAY ANTENNA

摘要

A compact broadband log-periodic antenna (5) for transmitting and receiving frequencies between 0.5 to 18 GHz. The antenna comprises two dielectric substrates (10, 12) bonded together, both substrates comprise a first group of dipole elements (36) configured in a log-periodic sequence and a second group of serpentine configured dipole elements (38) fabricated on the same substrate and in electrical communication with the first group of elements. The serpentine dipole elements are configured in a specific pattern such that the size of the antenna is reduced, yet still maintains log-periodic characteristics. Disposed between the two substrates is a feed system (22, 24, 26, 28, 30, 46) in electrical communication with both groups of elements such that a connector from a transmitter or receiver can be in communication with the antenna.