ABSTRACT
A sixteen-element dual band microstrip array antenna with four branches has been presented in this paper. The dual band array antenna is suitable for ISM/Bluetooth/Zigbee/WiMAX/ WiFi-2.4/5/6 GHz applications. The antenna is made up of eight circular patch (r = 2 mm) elements and eight rectangular patch (1 × 8 mm) elements that are connected together to provide double band and create a suitable radiation performance with a wide bandwidth. Therefore, the array is a combination of heterogeneous elements. Initially, to justify the antenna performance that means for estimating antenna gain, directivity, E-field, H-field and system efficiency both time domain (TD) and frequency domain (FD) solvers of computer simulation technology (CST) are used. The area of the antenna is 40 × 40 × 0.79 mm3. Rogers RT 5880 (lossy) is used as a substrate and metal (copper) is used as radiating layers. The estimated results attest the proposed array antenna work on dual band 2.20-3.18 GHz and 4.81-7.21 GHz with centre operating frequencies of 2.54 GHz and 5.64 GHz, respectively. It maintains return loss lower than -10 dB with a better gain and directivity over the both working bands. The key objective of using the array antenna is to get the improved gain compact array antenna as well as to get dual band so that it can be used in multiple applications in daily life. The performance of the proposed array antenna is validated by three professional 3D electromagnetic simulators: high-frequency structure simulator (HFSS), FEKO (a computational electromagnetics software) and CST.
ABSTRACT
In this research work, a π-shaped slotted microstrip patch antenna (MPA) with a partial ground structure for lower fifth generation (5G)/wireless fidelity (WiFi)/worldwide interoperability for microwave access (WiMAX) applications is presented. The proposed MPA is optimized and designed by using the computer simulation technology (CST) microwave studio (MWS) suite version of 2018. The π-shaped slotted MPA is mounted on low loss dielectric material Rogers RT5880 with a height of 0.79 mm and relative permittivity of 2.2. The length (L) and the width (W) of the π-slotted antenna are 35 mm and 31 mm respectively, which covers the operating frequency range 2.87-5.47 GHz. The MPA has a wide impedance bandwidth (2600 MHz), high radiation efficiency (90.88%), acceptable gain (2.647 dB) and low return loss (simulated: -36.81, measured: -25 dB). The VSWR over the entire operating frequency is regarded as 1 < voltage standing wave ratio (VSWR) < 2 and VSWR is 1.0293 at centre frequency 3.47 GHz. The current distribution on the surface as well as the input impedance of the π-shaped slotted MPA are also favorable. The MPA shows an omni-directional property over the entire operating frequency band. Since the time domain, frequency domain and fabricated results are buttressed by each other, the designed π-slotted MPA is one of the best candidates for high speed lower 5G/WiFi/WiMAX communication applications.
