38 research outputs found
Analysis of indoor MIMO channel capacity using spatial diversity technique
No full textThis paper focus on simulation and measurement of MIMO channel capacity for indoor propagation. A spatial diversity method is employed during measurement and simulation process. The investigation on the channel capacity for various distance and spacing of both transmitter and receiver antenna have been done. The investigations of channel capacity are included with difference distance between transmitter and receiver sides and different in element antenna spacing. For the simulation, the path loss for the free space and physical effect are been considered. The 2x2 rectangular microstrip patch array antenna is used in order to characterize channel parameter at 2.4GHz operating frequency. Measurement process for 4x4 antenna configuration is done in UTeM Microwave Laboratory. The capacities of MIMO channel also decrease by increasing the distance between transmit and receive antenna
The investigation of polarization diversity in MIMO system at 2.4 GHz
No full textThis paper describes the concept of multiple input multiple output (MIMO) system using polarization diversity that can enhance the channel capacity and increase the data output performance of the system. The microstrip antenna array is designed, fabricated and measured at the desired operating frequency for this measurement. Computer Simulation Technology (CST) software is used to design and simulate the microstrip antenna array. The simulation and measurement data results are compared and discussed. The fabricated microstrip antenna is used to develop the Radio Frequency (RF) MIMO test bed system. The system measurement was conducted in Microwave Laboratory at Faculty of Electronic and Computer Engineering, University Technical Malaysia Melaka with the operating frequency of 2.4 GHz. The spatial diversity and polarization diversity are applied in measurement campaign to investigate the performance of the wireless MIMO channel. The data obtained from the measurement was post-processed using MATLAB software in order to calculate the MIMO channel capacity. The analysis focused on the effect of the MIMO channel capacity due to the proposed measurement setup configurations. The channel capacity was increased from 0.03 b/s/Hz to 0.09 b/s/Hz when polarization diversity is applied at both transmitter and receiver
Investigation of single stage ?/4 transformer matching network to the X-circular polarized antenna
No full textThis technical paper present 2 design of x-circular polarized with slanted rectangular slot microstrip patch antenna. 4 different circular polarized wave is feed by using single port in X-form is at 450, 1350, 2250 and 3150. The combination of 4 patches for design 1 is without using quarter wave impedance matching technique and design 2 refer to the design x-circular polarized with slanted rectangular slot microstrip patch antenna with single stage transformer. The designs are simulated using Computer Simulation Technology (CST) with dielectric constant, ?r=4.3, loss tangent, tan ?=0.019 and thickness of substrate, t=1.6mm. The simulation results for ther return loss, bandwidth, gain, directivity and polarization have been compared. The ?/4 transformer matching network can improve the antenna performance especially the gain and efficiency
Comparative analysis of different defected waveguide structures towards monopole antenna
No full text
Design multiband planar printed monopole antenna with Minkowski and Lollipop defected parasitic structure (DPS) for wireless communication system
No full text
The Investigation of Polarozation Diversity in MIMO System at 2.4GHz
Get PDFThis paper describes the concept of multiple input multiple output (MIMO) system using polarization diversity that can enhance the channel capacity and increase the data output performance of the system. The microstrip antenna array is designed, fabricated and measured at the desired operating frequency for this measurement. Computer Simulation Technology (CST) software is used to design and simulate the microstrip antenna array. The simulation and measurement data results are compared and discussed. The fabricated microstrip antenna is used to develop the Radio Frequency (RF) MIMO test bed system. The system measurement was conducted in Microwave Laboratory at Faculty of Electronic and Computer Engineering, University Technical Malaysia Melaka with the operating frequency of 2.4 GHz. The spatial diversity and polarization diversity are applied in measurement campaign to investigate the performance of the wireless MIMO channel. The data obtained from the measurement was post-processed using MATLAB software in order to calculate the MIMO channel capacity. The analysis focused on the effect of the MIMO channel capacity due to the proposed measurement setup configurations. The channel capacity was increased from 0.03 b/s/Hz to 0.09 b/s/Hz when polarization diversity is applied at both transmitter and receive
