Abstract
This work addresses the synthesis of a multi-band frequency selective surface (FSS) through bioinspired computing and a general regression neural network (GRNN). This hybrid computational method, which utilizes the multi-objective cuckoo search algorithm combined to a GRNN, determine the best physical dimensions of the FSS in order to achieve a multi-band filtering at the 2.4, 3.5 and 5.8 GHz spectrums. Therefore, the results are to be applied to aid the propagation of Wi-Fi, WLAN, WiMAX and future sub-6 GHz 5G systems. The resonant frequencies were measured and a -10 dB cutoff value has been considered for the transmission coefficient. The triple rectangular loop conductor geometry of the device is printed upon a glass epoxy (FR-4) substrate. Measurements were made for different wave incidence angles, from 0° up to 45°, to demonstrate how signal incidence would affect the device’s functioning. The agreement between simulated and measured data display satisfactory results.
Highlights
The fifth generation of wireless communication, or 5G system, is being currently planned out, and there are many papers in the literature focusing on proposing operating frequency spectrums and propagation applications in order to make 5G systems function
According to [1], 5G operation aims for a 1,000 times greater traffic capacity, and an extended bandwidth capacity able to work at 1ms latency response with data rates in the order from 1 Gbps up to 10 Gbps, massively improving upon the current 4G-LTE networks
The configuration of the general regression neural network (GRNN) applied to this study presents five input neurons, a hidden layer of five neurons, and three output cells
Summary
The fifth generation of wireless communication, or 5G system, is being currently planned out, and there are many papers in the literature focusing on proposing operating frequency spectrums and propagation applications in order to make 5G systems function. According to [1], 5G operation aims for a 1,000 times greater traffic capacity, and an extended bandwidth capacity able to work at 1ms latency response with data rates in the order from 1 Gbps up to 10 Gbps, massively improving upon the current 4G-LTE networks. The sub-6 GHz range is applied to outdoor environments as it is easier to transmit and propagate, and communication companies (mainly in the United States and Asia) are already testing and applying 5G systems in this range for commercial purposes [2]. Telecommunications regulatory agencies from various parts of the world – such as the FCC (Federal Communications Commission) in the United States, the METIS project
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