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A novel single-feed reconfigurable antenna for polarization and frequency diversity

Published online by Cambridge University Press:  05 December 2016

Ailar Sedghara
Affiliation:
Faculty of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, Iran. phone: +44 1234 567 890
Zahra Atlasbaf*
Affiliation:
Faculty of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, Iran. phone: +44 1234 567 890
*
Corresponding author: Z. Atlasbaf Email: atlasbaf@modares.ac.ir

Abstract

A novel dual-band single-feed reconfigurable annular-ring slot antenna with polarization diversity is proposed. This antenna has the ability to switch frequency bands and polarization at the same time whereas applying a simple structure. It consists of two concentric circular slots and two tuning stubs on one side of the substrate and a 50 Ω microstrip feed line and two stubs on the other side. The proposed antenna can be switched between two resonant frequencies, 2.4 GHz (WLAN) and 3.5 GHz (Wimax). Furthermore, it can be switched between linear polarization (LP), left-hand circular polarization (LHCP), and right-hand circular polarization (RHCP) at the first frequency band, LHCP and RHCP at the second band. All these capabilities are achieved by applying only five PIN diodes on both sides of the substrate. Simulation and experimental results indicate that the proposed antenna demonstrates a good impedance bandwidth at the two frequency bands and satisfactory radiation pattern in five different states.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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