Document Type : Original Research Paper


1 Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

2 Faculty of Electrical Engineering and Robotic, Shahrood University of Technology


In this paper, a new method for designing an active dual-band dipole antenna is proposed. The operating frequencies of the proposed antenna are 150 and 450 MHz that are usually used in military applications. Using a series stub is the main idea in the proposed dual-band antenna, where it makes an independent resonance frequency higher than the main resonance frequency of a conventional dipole. To make appropriate matching impedance in the two frequency bands, the technique of creating an internal coaxial cable is used. Furthermore, to improve the antenna gain, an amplifier is in series part connected to the proposed dipole antenna. The simulated and measured results of the return loss, radiation patterns and antenna gain show that this antenna has a good operation in both resonance frequencies.

Graphical Abstract

Design, Simulation and implementation of active dual-band dipole antenna using a series stub


[1] C.A. Balanis, Antenna Theory Analysis and Design, 3rd Edition. 2005: John Wiley & Sons.

[2] W.L. Stutzman, Antenna Theory and Design, 4rd Edition. 2011: John Wiley & Sons.

[3] E. Lee, P.S. Hall, and P. Gardner, “Dual band folded monopole/loop antenna for terrestrial communication system,” Electronics Letters, vol. 36, no. 24, pp. 1990-1991, 2000.

[4] L. Economou and R.J. Langley, “Dual band hybrid vehicular telephone antenna,” IEE Proceedings - Microwaves, Antennas and Propagation, vol. 149, no. 1, pp. 41-44, 2002.

[5] M. Ali, et al., “Dual-frequency strip-sleeve monopole for laptop computers,” IEEE Transactions on Antennas and Propagation, vol. 47, no. 2, pp. 317-323, 1999.

[6] Y.T. Liu, “Stubby monopole antenna for UMTS/WLAN dualmode mobile phone,” Electronics Letters, vol. 43, no. 5, pp. 15- 16, 2007.

[7] R.E. Collin, Antenna and Radio wave Propagation 1985: McGraw-Hill.


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