M. N. Rahman

Design and Analysis of an Optimized S-shaped Resonator Based Triple Band Microstrip Antenna for Satellite Applications

This article presents the architecture and exploration of a compact S-shaped resonator based triple band microstrip antenna for satellite applications. The proposed antenna is modeled for use in C (4–8 GHz) band, X (8–12 GHz) band, and Ku (12–18 GHz) band satellite applications. The antenna is composed of a circular ring-shaped patch with an S-shaped resonator. The antenna size is 24 mm × 18 mm and the prototype is imprinted on Rogers RT/duroid 5880 materials with a depth of 1.57 mm. The substrate has a relative permittivity of 2.2 and a dielectric constant of 0.0009. The excitation is supplied through a 50 Ω microstrip line. The performance of the presented antenna has been simulated and verified using High-Frequency Structural Simulator (HFSS) and Computer Simulation Technology (CST). The prototype has been measured after fabrication. The results show that the antenna covers the frequency spectrum of 5.4–7.1 GHz (C-band), 8.6–11.7 GHz (X-band), and 14.5–18 GHz (Ku band) with a 10 dB return loss. The face-to-face and side-by-side fidelity factor of the proposed antenna are 0.8195 and 0.7740 respectively. The antenna has a 6.60 dBi maximum gain with stable radiation patterns throughout the operating bands which make the proposed antenna compatible with satellite application in the C-band, X-band, and Ku-band.

Detection of Salt and Sugar Contents in Water on the Basis of Dielectric Properties Using Microstrip Antenna-Based Sensor

This paper presents a microstrip antenna-based sensor for detecting salt and sugar in water. The patch antenna is low-cost and low-profile and is modeled to transmit and receive an electromagnetic signal. The presented antenna consists of a crescent-shaped patch and slotted partial ground. The compact size of the antenna is 32 mm

Miniaturized UWB antenna with excellent frequency ratio and bandwidth enhancement for wireless applications

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Compact microstrip patch antenna for multi-service wireless communications

mm. High-frequency structure simulator and computer simulation technology are used to simulate and analyze the characteristics of the antenna. The presented antenna achieves a 10 dB return loss from 2.50 to 18 GHz with 6.10 dBi of maximum gain, considerable efficiency, and consistent radiation patterns. The presented antenna is used as a sensor to detect salt and sugar in water in terms of reflection coefficient based on the dielectric properties of the solution. The percentage of salt and sugar in water changes the dielectric properties of the solution and the reflection coefficients subsequently. Results during the practical observations show that the reflection coefficient decreases with the increment of salt and sugar contents in the solution. With the excellent basic wideband antenna performances, the antenna shows good sensitivity to detect salt and sugar content in water. The presented antenna is suitable to be used in wideband wireless communications as well as wideband sensor applications.

Broken‐heart shaped microstrip patch antenna design for ultra‐wideband applications

A compact planner printed monopole antenna having a geometry of 44 × 42 mm2 is presented. This antenna is composed of a modified shaped patch with a partial slot ground plane and a height of 1.6 mm2 that shields the low-cost substrate material FR-4 with a relative permittivity of 4.6 and loss tangent of 0.02 that makes it suitable for UWB operations. 50Ω microstrip transmission line used as feed current and observe the simulated results in HFSS and CST simulator. With a decent impedance match and constant radiation pattern the presented antenna has comprehensive bandwidth of 8.2 GHz (2.5 GHz to 11.2 GHz) which makes the antenna appropriate for various ultra-wideband applications.

Design and analysis of a resonator based metamaterial for sensor applications

A compact slotted circle microstrip patch antenna is presented for the ultra-wideband applications and other multiple wireless communications. The antenna, consisting of a slotted partial ground and a slotted circular patch, covers wider frequency band than the Ultrawideband (UWB). The prototype is fabricated on an FR4 substrate having a thickness of 1.60 mm with the relative permittivity of 4.6 and dielectric loss tangent of 0.02. The antenna has a compact physical size of 28 mm × 18 mm and electrical size of 0.37λ × 0.24λ. The antenna achieves 10 dB return loss (VSWR ≤ 2) from 4.0 GHz to 19.80 GHz with 132.77% fractional bandwidth. The antenna shows a consistent omnidirectional radiation pattern with 2.85 dBi of average gain. As the antenna covers a wide bandwidth, it can be used in the high fidelity short pulse applications. Moreover, the antenna can be used in ultra-wideband (UWB) communications along with other communications channels such as C-band (4–8 GHz), X-band (8–12 GHz), Ku-band (12–18 GHz), ISM band, Wi-Fi, WLAN, WiMAX, and MVDDS wireless communication systems.