A Low-Cost Dual-Band CPW-Fed Printed LPDA for Wireless Communications

A dual-band printed log-periodic dipole array (LPDA) antenna for wireless communications, designed on a low-cost PET substrate and implemented by inkjet-printing conductive ink, is presented. The proposed antenna can be used for wireless communications both within the UHF (2.4–2.484 GHz) and SHF (5.2-5.8 GHz) wireless frequency bands, and presents a good out-of-band rejection, without the need of stopband filters. The antenna has been designed using a general-purpose 3-D computer-aided design software (CAD), CST Microwave Studio, and then realized. Measured results are in very good agreement with simulations.