Abstract
In this work, new structures of circular microstrip antenna based on slots are designed and simulated to operate with triple band applications. These slots are annular ring and rectangular shapes in different sizes. The annular ring slot is etched inside the circular patch while the other two rectangular slots are etched on the circular patch edge. The suggested antennas are simulated using version 13 of Ansoft High Frequency Structure Simulator (HFSS). The various parameters such as input impedance, reflection coefficient, gain, radiation patterns and surface currents were investigated. The present results observed that the optimum antenna designed is resonating at three frequencies 2.695, 5.799 and 8.323 GHz. Also, the bandwidths of simulated reflection coefficients at -10 dB are 106, 204 and 371 MHz which are identical with the S-, C- and X-bands frequencies, respectively. Therefore, the optimum antenna designed can be used in the space saving applications in addition to its important role in variety applications at these three frequency bands.
Highlights
In the microwave frequency range, one of the most common used types of antennas for radio frequency and wireless systems applications are the microstrip antennas (MSAs) due to their unique characteristics [1,2]
The major weakness of MSAs is the suffering from various disadvantages like low gain, high-quality factor and narrow impedance bandwidth etc
Design B is simulated for multiband applications as a single antenna
Summary
In the microwave frequency range, one of the most common used types of antennas for radio frequency and wireless systems applications are the microstrip antennas (MSAs) due to their unique characteristics [1,2]. These features include low cost fabrication and compatible with design of monolithic microwave integrated circuits, relatively compact, low profile, conformability, light weight and other attractive characteristics which have made MSAs considerably interesting [3,4]. There are several methods for achieving multiband operation, one of these methods is etch slots on the patch of MSA. These slots have been used in different shapes such as binary tree slot, V-, U-, C- and L-shaped slots [10–14]
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