Design and Implementation of a Wideband Antenna for Simultaneous Receiving and Transmitting Signal with an Improved Isolation

Articles in Press

Document Type : Research Article

Authors

Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

This paper proposes a dual-layer, microstrip patch antenna for simultaneous sending and receiving in the telecommunications industry. In this design, the harmonic suppression method is used. The proposed antenna has two ports with improved isolation and combines several telecommunication elements, including filters, duplexers, and radiators, into a single device, which reduces size, weight, and cost. The proposed antenna is designed, fabricated, and measured at C-band to verify and design methodology. The measurement results agree with the simulation results, which represent a complete two-way antenna in the frequency bands of (4.56-5) GHz (9.2%) and (6.25-7.39) GHz (16.8%) with an isolation of over 33 dB. The proposed antenna gain for the first and second bands is 5.6 dBi and 6.3 dBi, and the 3-dB beamwidths in two frequencies (f = 4.8 GHz and f = 6.8 GHz) are 83° and 85°, and the cross-polarization levels are −22 and −23 dB in the E- and H-planes, respectively. The antenna exhibits pure linear polarization with minimal cross-polarization levels observed in both E- and H-planes.

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AUT Journal of Electrical Engineering

Articles in Press, Accepted Manuscript
Available Online from 22 November 2025

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