AUT Journal of Electrical Engineering

AUT Journal of Electrical Engineering

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

Document Type : Research Article

Authors
Abbas Sabeti Aghdam 1
Gholamreza Moradi 2
1 Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran.
2 Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
10.22060/eej.2025.23986.5644
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.
Keywords
Microstrip Patch Antenna
Send and Receive Simultaneously
C-Band
Wideband Antenna
Satellite Communication
Subjects
1.       [1] C.-X. Mao, S. Gao, Y. Wang, Dual-Band Full-Duplex Tx/Rx Antennas for Vehicular Communications, IEEE Transactions on Vehicular Technology, 67(5) (2018) 4059-4070.
[2] C.-X. Mao, S. Gao, Y. Wang, F. Qin, Q.-X. Chu, Compact Highly Integrated Planar Duplex Antenna for Wireless Communications, IEEE Transactions on Microwave Theory and Techniques, 64(7) (2016) 2006-2013.
[3] Y.-J. Lee, J.-H. Tarng, S.-J. Chung, A Filtering Diplexing Antenna for Dual-Band Operation With Similar Radiation Patterns and Low Cross-Polarization Levels, IEEE Antennas and Wireless Propagation Letters, 16 (2017) 58-61.
[4] X.-J. Lin, Z.-M. Xie, P.-S. Zhang, Y. Zhang, A Broadband Filtering Duplex Patch Antenna With High Isolation, IEEE Antennas and Wireless Propagation Letters, 16 (2017) 1937-1940.
[5] S. Mukherjee, A. Biswas, Design of Self-Diplexing Substrate Integrated Waveguide Cavity-Backed Slot Antenna, IEEE Antennas and Wireless Propagation Letters, 15 (2016) 1775-1778.
[6] J.-D. Zhang, L. Zhu, Q.-S. Wu, N.-W. Liu, W. Wu, A Compact Microstrip-Fed Patch Antenna With Enhanced Bandwidth and Harmonic Suppression, IEEE Transactions on Antennas and Propagation, 64(12) (2016) 5030-5037.
[7] D.M. Pozar, Microwave Engineering, Wiley (John Wiley & Sons), 1997.
[8] J.-F. Li, D.-L. Wu, G. Zhang, Y.-J. Wu, C.-X. Mao, A Left/Right-Handed Dual Circularly-Polarized Antenna With Duplexing and Filtering Performance, IEEE Access, 7 (2019) 35431-35437.
[9] J.-F. Li, D.-L. Wu, G. Zhang, Y.-J. Wu, C.-X. Mao, Compact Dual-Polarized Antenna for Dual-Band Full-Duplex Base Station Applications, IEEE Access, 7 (2019) 72761-72769.
[10] A.A. Khan, M.K. Mandal, Compact Self-Diplexing Antenna Using Dual-Mode SIW Square Cavity, IEEE Antennas and Wireless Propagation Letters, 18(2) (2019) 343-347.
[11] C.-X. Mao, Z.H. Jiang, D.H. Werner, S.S. Gao, W. Hong, Compact Self-Diplexing Dual-Band Dual-Sense Circularly Polarized Array Antenna With Closely Spaced Operating Frequencies, IEEE Transactions on Antennas and Propagation, 67(7) (2019) 4617-4625.
[12] K.-Z. Hu, M.-C. Tang, Y. Wang, D. Li, M. Li, Compact, Vertically Integrated Duplex Filtenna With Common Feeding and Radiating SIW Cavities, IEEE Transactions on Antennas and Propagation, 69(1) (2021) 502-507.
AUT Journal of Electrical Engineering
Volume 58, Special Issue 1
2026
Pages 105-112