Design of Log-Periodic Dipole Array Antenna with Implemmented Extra Dipole

摘要

A Log-Periodic Dipole Array (LPDA) antenna operating between 1.63 and 3.7 GHz for VSWR less than 2 is designed and presented in this paper. The antenna structure consists of 11 dipoles printed on a FR4 substrate with dimensions of 91 × 155 mm². The antenna covers the WLAN band (2.4 GHz) and the WiMAX band (3.5 GHz) stablished by the IEEE 802.11 standard. The antenna has a crisscross feeding structure, which contributed to a good impedance matching and an end-fire radiation pattern. The simulated current distribution results show a progressive phase feeding of the LPDA antenna elements and a good agreement with radiation pattern results.