Dual‐polarized high gain resonant cavity antenna for radio frequency energy harvesting

Abstract

A Fabry pérot antenna with a multilayer superstrate having nonuniform unit cells has been investigated as a receiving antenna for radio frequency (RF) energy harvesting applications. Here, the primary radiator is selected as a dual‐polarized aperture coupled microstrip antenna with a double‐layer superstrate. This antenna excites orthogonal polarizations, vertical (V) and horizontal (H) in the frequency band of 6.2 and 5.8 GHz, respectively, due to the presence of two orthogonal H‐shaped slots in its ground plane. The proposed antenna provides a gain enhancement of 9.8 and 10.1 dBi at the respective frequencies. The rectifying circuit is designed for a frequency of 5.8 GHz using a voltage doubler topology. The circuit provides a power conversion efficiency of 41% at 0 dBm input power.

Novel low‐profile dual‐band and dual‐polarization Fabry‐Pérot resonator antenna

“…Moreover, its profile is lower and its 3‐dB gain bandwidths are wider. Due to the single‐layer superstrate, the proposed FPRA is easier to assemble and exhibits a more stable structure than the ones with double‐layer superstrate presented in References 18–21. Although the FPRA presented in References 17 also has a single‐layer superstrate, its profile and frequency ratio are larger than that of the proposed FPRA.…”

“…The comparison of the proposed FPRA and some existing designs is shown in Table 2. Compared with the dual‐band and dual‐polarization FPRAs presented in References 20 and 21, the proposed FPRAs contains only a single‐layer superstrate. Moreover, its profile is lower and its 3‐dB gain bandwidths are wider.…”

“…However, two high‐gain passbands with small frequency ratios are difficult. Thus far, most FPRAs achieve dual‐band performance by increasing the number of air cavities 18‐21 . For instance, a dual‐band and dual‐polarization FPRA is designed by adding an air cavity between the double‐layer superstrate 20 .…”

“…For instance, a dual‐band and dual‐polarization FPRA is designed by adding an air cavity between the double‐layer superstrate 20 . A dual‐polarization FPRA with double‐layer superstrate is designed for radio frequency energy harvesting 21 . Because air cavities has some drawbacks for multilayer FPRA, such as complex structure and high profile, it is significant to design a dual‐band FPRA with a small frequency ratio and single‐layer superstrate.…”

Dual Circularly Polarized Fabry–Perot Resonator Antenna Employing a Polarization Conversion Metasurface

“…The FP resonator antenna can also be designed to obtain dual polarization [15][16][17][18]. The most used way to realize dual polarization FP resonator antenna is adopting dual polarized feed [19][20][21]. A dual-polarized dielectric resonant antenna is designed and used as the source of the FP resonator antenna in [19].…”