Abstract
This research investigates a monopole patch antenna for Wi-Fi applications at 2.45 and 5.2 GHz, and WiMax at 3.5 GHz. A low-cost and flexible graphite sheet with good conductivity, base on graphite conductive powder and glue is used to create a radiator patch and ground plane. Instead of commercially available conductive inks or graphite sheets, we use our self-produced graphite liquid to create the graphite sheet because it is easy to produce and inexpensive. The antenna structure is formed using a low-cost and easy hand-screen printing approach that involved placing graphite liquid on a bendable polyester substrate. This research focuses on designing and developing a low-cost, thin, light, and flexible patch antenna for wireless communication and smart glass applications. The proposed antenna utilizes CST microwave software for simulations to improve the parameters before fabrication and measurement. The simulation and measurement results for the reflection coefficients at 2.45 GHz, 3.5 GHz, and 5.20 GHz are reliable and cover the required resonance frequencies, antennas gain are 1.91, 1.98, and 1.87 dB, respectively. Additionally, the radiation patterns of both results are omnidirectional. In the experiments, bending the proposed patch antenna along with the cylinder with the radii of 60, 40, and 25 mm yielded the same measurement results as the unbent patch antenna.
Highlights
Today, wireless communication is commonly used in people’s everyday lives
A slim planar short monopole antenna was designed on an FR-4 substrate consisting of a mirrored C-shape with a narrow gap from the ground to support a dual-band WLAN at 2.4 and 5.5 GHz: for laptop and tablet applications [3]
A wearable monopole antenna was designed with CPW-fed for 2.45 GHz using graphene and carbon nanotubes (CNTs) conductors on a flexible PDMS substrate for body application [5]
Summary
Wireless communication is commonly used in people’s everyday lives. Researchers have been increasingly interested in studying and designing antennas to support wireless communication applications, such as dual-band antennas at 2.45 and 5.8 GHz for active radio frequency identification. An L-shaped and stair-shaped microstrip patch antenna with CPW-fed was designed with two conductive elements between pure copper and zelt with two additional substrates between polyester and jeans to support dual-band frequency, 2.45 and 5.8 GHz, on a garment that could be used for WiFi and WiMax applications [9]. An elliptical shape monopole antenna with CPW-fed was designed by an inkjet printer with screen-printed silver conductive ink over the PET-film substrate to support UWB (3.4–12 GHz) [22]. In these literature reviews, several antennas have been designed and fabricated to support a variety of purposes. The prototype antenna performed WiFi communication at 2.45 and 5.2 GHz, and WiMax 3.5 GHz for wireless communication and smart glass applications
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