A new broadband millimetre-wave reflectarray antenna structure utilizing novel polarization insensitive multi resonant unit cells is proposed. The design frequency of the RA is set at 30 GHz, and it consists of 20×20 polarization independent insensitive resonant unit cells (UCs), which are illuminated by pyramidal horn antenna. The unit cell of this array contains two concentric rings combined with a cross loop and cross strips inside for bandwidth enhancement. For maximum aperture efficiency and realized gain, a pyramidal horn antenna placed at F to obtain F/D=0.4. The simulation results show that the obtained maximum gain is 25.1 dB with a slight variation over the operating frequency range and a good cross-polarization level.
[1]
Osama M. Haraz,et al.
B2. Broadband millimeter-wave rectangular reflectarray antenna utilizing novel polarization insensitive multi-resonant unit cells
,
2015,
2015 32nd National Radio Science Conference (NRSC).
[2]
Y. Rahmat-Samii,et al.
On Understanding the Radiation Mechanism of Reflectarray Antennas: An Insightful and Illustrative Approach
,
2012,
IEEE Antennas and Propagation Magazine.
[3]
J. Encinar,et al.
Reflectarray antennas
,
2007,
Developments in Antenna Analysis and Design: Volume 2.
[4]
D. Pozar.
Bandwidth of reflectarrays
,
2003
.