This paper presents a new antenna class based on different logarithmic-periodic dipole structures printed on a single dielectric substrate. All the antenna types of this class can be implemented as single-band, multi-band or ultra-wideband antennas corresponding to the number of dipole groups combined to an array. The antenna radiation patterns depend on the mutual orientation of individual dipoles resonating at the same frequency. A specially shaped metal reflector can be additionally used in order to change the radiation patterns. V-shaped and pyramidal/conical reflectors have been used for bi-directional and omni-directional antennas, correspondingly. Each type of this new antenna class can be used as a multi-band indoor base station antenna supporting GSM900, GSM1800/1900, DECT, UMTS, UMTS+, WLAN, and WiMAX frequency bands simultaneously.
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