Broadband Resonant Elements for 5G Reflectarray Antenna Design

• Published in: Telkomnika 2017-06, Vol.15 (2), p.793
• Main Authors: Hashim Dahri, M., R. Kamarudin, M., H. Jamaluddin, M., Inam, M., Selvaraju, R.
• Format: Article
• Language: English
• Subjects: Antenna design; Antennas; Bandwidths; Broadband; Communication; Design
• ISSN: 1693-6930; 2302-9293
• DOI: 10.12928/telkomnika.v15i2.6122

The unit cell patch element is designed to reflect the incident signals coming from the feed horn into a desired direction with a planar wave front, as shown in Figure 1. The inability of unit cell element to acquire a full 360° reflection phase swing is the main reason behind the generation of differential spatial phase delays in the reflected signals. Subsequently the future fast communication systems such as 5G are proposed to work at the higher frequencies due to their high data rate requirements [8, 9]. High data rates require fast switching mechanism [10] which is only possible to attain at short wavelengths with high frequencies. [...]in this work, a novel design aspect of a square patch reflectarray antenna has been proposed for wide bandwidth operation at K-band frequency range. Simulations of proposed designs have been performed by CST computer model with proper boundary conditions applied for infinite array approach. Design Considerations Different frequency bands have recently been suggested for 5G communications based on their capabilities to attain required features [11]. [...]the progressive phase distribution performance of proposed broadband elements as a function of their variable size is presented. 3.1.Development of Broadband Novel Elements The bending depth "d" as shown in Figure 2 for Bent Width and Bent Length elements has been varied gradually in order to observe the effect of the generation of a second resonance. [...]the reflection loss of second resonance also gradually decreases from acquired a progressive phase distribution of 575° when its length is changed...