scholarly journals Channel Impulse Response at 60 GHz and Impact of Electrical Parameters Properties on Ray Tracing Validations

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 393
Author(s):  
Huthaifa Obeidat ◽  
Atta Ullah ◽  
Ali AlAbdullah ◽  
Waqas Manan ◽  
Omar Obeidat ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Ray Tracing ◽  
Impulse Response ◽  
Line Of Sight ◽  
Indoor Propagation ◽  
60 Ghz ◽  
Environment Design ◽  
Electrical Parameters ◽  
Concrete Walls ◽  
Properties Of Materials

This paper outlines a study of the effect of changing the electrical properties of materials when applied in the Wireless InSite (WI) ray-tracing software. The study was performed at 60 GHz in an indoor propagation environment and supported by Line of Sight (LoS) and Non-LoS measurements data. The study also investigates other factors that may affect the WI sensitivity, including antenna dimensions, antenna pattern, and accuracy of the environment design. In the experiment, single and double reflections from concrete walls and wooden doors are analysed. Experimental results were compared to those obtained from simulation using the WI. It was found that materials selected from the literature should be similar to those of the environment under study in order to have accurate results. WI was found to have an acceptable performance provided certain conditions are met.

Four-Stream Line-of-Sight Spatial Multiplexing for 60 GHz Backhaul Applications

2021 ◽  
pp. 1-1
Author(s):  
Darko Cvetkovski ◽  
Tim Halsig ◽  
Berthold Lankl ◽  
Eckhard Grass
Keyword(s):  
Spatial Multiplexing ◽  
Stream Line ◽  
Line Of Sight ◽  
60 Ghz

Chitosan-Bentonite Crosslinked Film As Indicator for Copper (II) Ions Adsorption

2021 ◽  
Author(s):  
Nurul Huda Osman ◽  
Nurul Najiha Mazu ◽  
Josephine Liew Ying Chyi ◽  
Muhammad Mahyiddin Ramli ◽  
Mohammad Abdull Halim Mohd Abdull Majid ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Impedance Spectroscopy ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Dc Conductivity ◽  
Dielectric Constants ◽  
Peak Amplitude ◽  
Electrical Parameters ◽  
Before And After

This paper reports on chitosan/bentonite crosslinked (ChB-ECH) film for removal of Cu (II). The effects of chitosan/bentonite ratio on the removal percentage were studied along with the effect of different Cu (II) concentration and the contact time on the film adsorption capacity, qt. The electrical properties of the film are studied, before and after the adsorption occurred, by using impedance spectroscopy for different parameters such as DC conductivity, the complex dielectric constants (ε’ and ε”) and complex electrical modulas (M’ and M’’). The results showed that the chitosan/bentonite ratio of 3:1 produces highest removal percentage at 29 %, while the contact time of 120 minutes was found to be optimum. An increment in the DC conductivity of the ChB-ECH film’s was observed up to 10-7 S/cm as the removal percentage of film increased. The film with the highest Cu (II) adsorb also showed the highest value for ε’ and ε” while exhibiting non-Derby behavior. Shifting of peak amplitude of the M” towards the higher frequency was also observed as the Cu (II) adsorption in the film increased. The results showed that all the electrical parameters can be utilized to determine the amount of adsorbed copper (II) in chitosan/bentonite film.

Acoustical Design Study on Application of Absorption Materials

2014 ◽  
Vol 711 ◽  
pp. 546-549
Author(s):  
Wei Lin ◽  
Wei Hwa Chiang
Keyword(s):  
Computer Simulation ◽  
Energy Distribution ◽  
Ray Tracing ◽  
Impulse Response ◽  
Background Noise ◽  
Three Dimensional ◽  
Design Phase ◽  
Design Study ◽  
Sound Energy ◽  
Reinforcement System

Taipei Top Church Auditorium is a hall primarily intended for praise and worship. A three dimensional ray tracing computer simulation was used to provide sound energy distribution on the audience area of the hall, realistic design have been performed. The volume of the hall is 24600m3, which is occupied for 2200 people and equipped the hall with acoustical curtains by modifying its acoustical characteristics. Objective measurements of impulse response are reported, and background noise control and noise isolation are also be considered in the design phase. Reinforcement system is conducted to meet all the activity for the acoustical environments.

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