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Journal Antennas №9 for 2015 г.
Article in number:
The modified dipole-like antenna fed by a circular waveguide with dominant TE11 mode
Keywords: dipole-like antenna circular waveguide image theory induced emf method radiation resistance complex input impedance
Authors:
D. A. Bukhtiyarov - Undergraduate Student, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: ghostandfound@mail.ru A. P. Gorbachev - Dr.Sc. (Eng.), Professor, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: apgor@ngs.ru A. V. Shvedova - Post-graduate Student, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: annsh21@mail.ru
Abstract:
The modified dipole-like antenna is excited by using a circular waveguide with dominant TE11 mode. To improve the implementation and increase the polarization purity we propose the so-called ends-fed dipole radiator which is excited through the circular waveguide directly without the balance unit (balun) by using the two coaxial probes only. The first probe is placed inside the waveguide λg/4 away from the bottom and the second one is placed 3λg/4 away from that, where λg - is the guide wavelength. Both the probes should be optimized over the length in order to create the little return loss. Experimental results have verified the proposed approach. The presented antenna may be used in wireless communication systems.
Pages: 44-52
References

 

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