Metallic rectangular waveguides are often the preferred choice on telecommunication systems and medical equipment working on the upper microwave and millimeter wave frequency bands due to the simplicity of its geometry, low losses, and the capacity to handle high powers.
The results indicate that the proposed antenna prototype – I yields the broadband impedance bandwidth >20 GHz (from 20 to >40 GHz) define by S11 < −10 dB that covers two important millimeter wave frequency bands (28/38 GHz).
The increasing demand for higher data rates has motivated research in millimeter wave frequency bands for 5G cellular systems.
Numerical Simulations: MAGMAS is a numerical software tool, initially developed at the KU Leuven, for electromagnetic problems in the microwave and millimeter wave frequency bands.[ 42, 43] Subsequently, it has been extended to include the special features of plasmonic nano-technology: (near) optical frequencies, strongly dispersive materials and volumetric meshing.
This program will develop an extremely wideband, compact, and robust spectrum sensing system for the microwave through millimeter-wave frequency bands to facilitate efficient high-bandwidth communications and high-resolution sensing in future mobile electronic systems.
The growing demands for high-speed data streams and broadband wireless services have significantly driven the worldwide researches on 60 GHz millimeter-wave frequency band communications, which is mainly designed for the wireless accessing network such as the pico-cellular mobile systems, the wireless local area networks (WLANs), and wireless personal area networks (WPANs) [1].
It would be highly interesting to compare the channel characteristics at current cellular frequency bands and at millimeter wave bands in the same propagation scenarios.
Another approach is to exploit the advances in CMOS technology to operate in frequency bands in the millimeter-wave region.
Although radiation in much of the millimeter band is blocked by Earth's atmosphere, three frequency bands can pass through relatively unscathed.
One interesting research topic in millimeter wave channel modeling is the differences and similarities in channel characteristics at different frequency bands.
