Abstract
This study focuses on the design and analysis of Ku band reflectarray antenna using a novel crossed dumbbell (clover) patch unit cell. The reflectarray is proposed for application in satellite communication more specifically for Satellite newsgathering (12.5-13.75 GHz). The clover shaped unit cell is designed for 13.07 GHz and the suitability of the unit cell is validated using the phase characteristics analysis. The effect of the elements on the performance represented by the range of the reflection phase is of prime importance. From the observation, Clover unit cell has large phase variation compared to minkowski and koch unit cells. Therefore, the main purpose of this study is to investigate and validate the novel unit cell with a wide phase characteristics and the reflectarray constructed.
Highlights
RADAR and long distance communications demands high gain antennas
The Proposed design is to work for the satellite communication- satellite newsgathering(12.5 GHz- 13.75 GHz), Fixed links(13.25 GHz-13.75 GHz) and Aeronautical Radio navigation (13.25 GHz- 13.4 GHz) in the Ku band centered at 13.07 GHz in a miniaturized dimensions of 13.8 cm x 13.8 cm with 117 elements present in the reflect array
Variety of reflect array unit cells are available in literature for different applications and with different phase characteristics
Summary
RADAR and long distance communications demands high gain antennas. Traditionally, high - gain applications have relied upon parabolic reflectors or arrays. At high frequencies parabolic reflectors poses complexity in manufacturing due to its curved geometry, added to this parabolic reflectors lacks wide - angle beam scanning. The high - gain array antenna provides wide angle beam scanning at the cost of complexity and expensiveness. Variety of reflect array unit cells are available in literature for different applications and with different phase characteristics. Phase characteristics is one of the prime factor in designing the reflect array unit cell. The unit cells of various configurations of koch and minkowski elements gave a phase of 300 degrees only [2]. The reflect array using dielectric resonator was proposed and gave a phase of 360 degrees only [4]. The novel crossed dumbbell (clover) patch unit cell proposed has a wide phase characteristics of more than 410. The novelty is addressed in terms of unit cell geometry and its excellent phase characteristics
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