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

Abstract

A dual-band printed Log-periodic dipole array (LPDA) antenna for wireless communications, designed on a lowcost 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 3D CAD, CST Microwave Studio, and then realized. Measured results are in very good agreement with simulations.

Coplanar Waveguide (Cpw)-Fed Compact Dual Band Antenna for 2.5/5.7 GHZ Applications

“…A CPW-fed slot antenna is realized by embedding a vertical stub with the T-shaped strip and a slit to the ground plane as reported in [22] for realizing dual-band operations. Various dual-band antenna designs include symmetrically introducing four slot stubs on lateral arms [23], by an asymmetric slots in F-shaped end patch [24], by backed ground plane with radial stub on two identical elements [25], by using two parallel monopoles, one curved and one fork-shaped [26], by monopole structure with two inverted U-shaped, L-shaped lateral stubs [27], with two rectangular parasitic elements and an I-shape grounded stub [28], by printed log-periodic dipole array (LPDA) [29], by slots and monopole antenna [30], and by employing meander line technique in [31]. A theoretical and experimental study of twin-slot multilayer CPW-fed antenna is reported in [32], and highly selective behavior and regulation of sharp variations of a discontinuous parallel-plate waveguide with a narrow rectangular ridge filled with axially anisotropic material identified using mode matching technique is achieved in [33].…”

Antenna With Two Folded Strips Coupled to a T-Shaped Monopole

“…Nowadays, the bandwidth often mixes the UHF-WLAN bands with the LTE bands [1][2][3]. Sometimes, the SHF-WLAN band may also be included [4][5][6]. For the configurations of the antennas, most of them involve the use of the meandered lines.…”

“…For the configurations of the antennas, most of them involve the use of the meandered lines. In [5,6], however, the log-periodic dipole arrays are adopted. As the lowest frequency is decreased to 690 MHz, it causes the main challenge to design the mobile antenna with an even limited space.…”

A Printed LPDA Antenna Fed by a Microstrip Line to Double Sided Parallel Strip Line from Backside

“…It is also difficult to be integrated with the printed circuit. Also, a printed LPDA antenna fed by a coplanar waveguide (CPW) is presented in [11,12]. However, these antennas are also somewhat complicated in terms of integration with other RF circuits.…”