Design of a New Reflectarray Element to Enhance Bandwidth by Using a Microstrip Array Antenna as Feed
||International Journal of P2P Network Trends and Technology (IJPTT)||
|© 2015 by IJPTT Journal|
|Volume - 5 Issue - 2
|Year of Publication : 2015|
|Authors : Alireza Bayat, Mehrdad Parsapour|
|DOI : 10.14445/22492615/IJPTT-V17P401|
Alireza Bayat, Mehrdad Parsapour "Design of a New Reflectarray Element to Enhance Bandwidth by Using a Microstrip Array Antenna as Feed". International Journal of P2P Network Trends and Technology (IJPTT), V5(2):1-9 Mar - Apr 2015, ISSN:2249-2615, www.ijpttjournal.org, Published by Seventh Sense Research Group.
The bandwidth behaviors of reflectarray elements are discussed in this paper to improve the intrinsic limitation of narrow bandwidth it offers. This is done by analyzing the relationship between bandwidth and phasing distribution and Reflection loss characteristics of the elements. Nine shapes of elements, i.e., Square, Circle, Ellipse, Triangle and loop of these elements have been investigated and a new shape has been proposed. Rogers RT/Duroid 5880 dielectric substrate (?r = 2.2 and tan ? = 0.0009) is used. These elements are designed to operate at X-band frequency range using CST microwave studio. In this paper, a microstrip array antenna instead of horn is used to feed the reflectarray antenna which is so lighter and is simple to manufacture compared to a horn. It has been demonstrated from this work that proposed element can offer the lowest reflection loss and reflection phase slope which can enhance bandwidth. So, the reflectarray antenna by using this element is considered in this paper which has 24.73 % (-3dB) bandwidth in X-band.
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Bandwidth enhancement, reflectarray antenna, reflection loss parameter, phase range parameter, phase slope parameter.