Multi-Band/Wide Band Printed Quad Helical Antenna

A technique is proposed for designing multiband and/or wide band printed quadritilar helical antennas. This technique uses a microstrip line tuning section in the vicinity of the feeding ports. This section contains an elongated body and a tail member extending away from the body. A geometry of the tail member is selected for modifying an impedance of the radiating element and broadening the antenna resonance bandwidth. A four port antenna is designed for operating in wide band (24%, Sll <-15dB) or in three frequency bands, with one of the frequency bands being more than 24% (Sll <-10dB): 1.88-2.12GHz (E-UTRA 39), 2.3-2. 4GHz (E-UTRA 40) and 3.4-3.8GHz (E-UTRA 42 and 43).