A Metal-Only Reflectarray Antenna Using Double Split Square Ring Slot Element

Double split ring slot FSS reflectarray for difference pattern generation

Wideband double-element ring slot antenna - Electronics Letters

Introduction: Annular ring slot antennas are considered to be among the narrowband resonant antennas and occupy an area of l=4p at their first resonance [1]. Multi-element concentric ring slots have been used to design multi-band antennas [2]. However, because of transmission zeros that exist between the different resonances, these resonances cannot easily be merged to obtain a wideband respons...

Analysis of Single Square Ring Reflectarray Element for Bandwidth Enhancement

An analysis of phase variation and phase range of single square ring element for broadband reflectarray antenna is presented in this paper. The analysis and design of reflectarray antenna element is presented based on variable size of the square ring element parameter a t X-band and Ka-band. The design procedure and critical parameters are also discussed. Modifying the current distribution of s...

A multiband double square slot antenna with fractal geometry

A multiband double square loop antenna with fractal concept is proposed. The design is based on an initial model of fractal geometry and a double square slot antenna structure. The initial model of fractal geometry influences to the second frequency band and it will be carefully investigated. The radiation patterns of the proposed antenna are still similarly to bidirectional radiation pattern. ...

Design of Liquid Crystal Based Tunable Reflectarray Antenna Using Slot Embedded Patch Element Configurations

This paper presents the design and analysis of Liquid Crystal (LC) based tunable reflectarray antenna with different design configurations within X-band frequency range. The effect of LC volume used for unit cell element on frequency tunability and reflection loss performance has been investigated. Moreover different slot embedded patch element configurations have been proposed for LC based tun...