Abstract
This paper proposes a novel and compact monopole microstrip antenna design with a three-dimensional (3D) printed curved substrate for biomedical applications. A curved substrate was formed by inserting a semi-cylinder structure in the middle of the planar substrate consisting of polylactic acid. The antenna was fed with a microstrip line, and a partial ground plane was formed at the bottom side of the substrate. The copper plane with two triangular slots is arranged on the curved semi-cylinder structure of the substrate. The physical dimensions of the radiating plane and ground plane were optimally determined with the use of the sparrow search algorithm to provide a wide-10dB bandwidth between 3 and 12GHz. A total of six microstrip antennas having different parameters related to physical dimensions were designed and simulated to compare the performance of the proposed antenna with the help of full-wave electromagnetic simulation software called CST Microwave Studio. The proposed curved antenna was fabricated, and a PNA network analyzer was used to measure the S11 of the proposed antenna. It was demonstrated that the measured S11 covers the desired frequency range.
Highlights
Due to their remarkable characteristics, including small size, flat structure, low-cost, conformal modeling, ease of production, and simple integration with solid-state devices, microstrip antennas (MAs) have been extensively utilized in a variety of applications such as aircraft, space, and satellite communication systems, missile applications, biomedical devices, sensors and devices that demand small-sized antennas [1]
This paper proposes a novel and compact monopole microstrip antenna (MA) design with a three-dimensional (3D) printed curved substrate for biomedical applications
A curved substrate was formed by inserting a semi-cylinder structure in the middle of the planar substrate consisting of polylactic acid (PLA)
Summary
Due to their remarkable characteristics, including small size, flat structure, low-cost, conformal modeling, ease of production, and simple integration with solid-state devices, microstrip antennas (MAs) have been extensively utilized in a variety of applications such as aircraft, space, and satellite communication systems, missile applications, biomedical devices, sensors and devices that demand small-sized antennas [1]. MAs for biomedical applications can be modeled and manufactured in a variety of ways utilizing 3D printing technology Both the radiating planes of the antenna and the substrate can be manufactured using 3D printing technology. Muntoni et al [13] proposed a novel 3D printed substrate structure to enhance the bandwidth and reduce the size of a microstrip antenna. A rectangular radiating copper plane was used to cover the curved surface, and two triangular slots were formed on the copper plane to provide a wider bandwidth between 3 GHz and 12 GHz. The proposed antenna was fed by a microstrip line, and a partial ground plane was used at the bottom side of the substrate.
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