Terahertz plasmonic resonances in semiconductor (indium antimonide, InSb) dimer antennas are investigated theoretically. The antennas are formed by two rods separated by a small gap. We demonstrate that, with an appropriate choice of the shape and dimension of the semiconductor antennas, it is possible to obtain large electromagnetic field enhancement inside the gap. Unlike metallic antennas, t...

As today’s communication devices are becoming smaller in size, they need antennas also of small size which are capable of providing higher performance. Modern telecommunication systems need antennas with wider bandwidth, multiband support, low cost and conventionally smaller design dimensions for commercial as well as military applications. This ever increasing demand of small, multiband antenn...

In this paper, microstrip patch antennas with six different shapes i. e. rectangular, circular, square, elliptical, pentagonal and hexagonal are implemented using Ansoft HFSS version 13. 0. 0 software. Antennas are designed on Rogers RT/duroid 5880 material with dielectric constant 2. 2 and thickness 3. 2 mm. The different performance parameters such as return loss, gain and bandwidth of these ...

Spectral efficiency (SE) of massive multiple-input multiple output (MIMO) systems with a very large number of antennas at the base station (BS) considering for space constraint antennas are investigated in this paper. In literature, fixed spacing inter-element were considered, the number of antennas increases with a fixed total distance in a practical topology an inversely proportional to inter...

Abstract The antenna height and directivity are used in the classification of statistical channel models for local multipoint distribution service (LMDS). When directional antennas are used and the antennas are sufficiently high providing a line-of-sight (LOS) propagation path between the transmitter and receiver, the statistics of the radio channel can be described by the lognormal or Nakagami...

On Maximizing Capacity in Fixed Mesh Networks with MIMO Links Stephan Bohacek Department of Electrical and Computer Engineering University of Delaware [email protected] Abstract: Multiple antennas can dramatically improve the performance communication. It is a design choice as to how the antennas are used and how they improve performance. For example, by transmitting different data over the diff...

The effects of different UWB antennas on body area propagation channel is analyzed. Different orientations of directional antennas and different spacings 13 between planar antennas and the body are investigated in an on-body scenario. Time domain channel parameters, e.g. mean delay and delay spread, are 15 extracted from measurement data. The distribution of the channel parameters allows classi...