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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"5.8 GHz"”.
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Triple band dipole antenna with harmonic suppression capability
… which generate four frequency bands 0.8 GHz/2.4 GHz/ 4 GHz/ 5.8 GHz; The unwanted frequency of 4 GHz have been suppressed by adding single stub. The second design is dual band dipole antenna with two stubs to eliminate the unwanted frequency. Design two is repeated of three different …
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Design of reconfigurable intelligent surface for 5G wireless communication system
… 25 elements RIS, has operating frequency at 5.8 GHz, is designed and simulated by using full-wave simulator. The unit cell of the prototype design can be controlled by using a RF switch, which can switch between two states, [0, 180], to change the reflectivity of the surface to apply a 180-degree …
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Design and implementation of a non-contact microwave level measument instrument
… for a pulsed radar architecture operating at 5.8 GHz with a bandwidth around 1 GHz and at a repetition frequency of 3.58 MHz.
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Antennas for wireless sensor network applications
… patch antenna, operating at 5.8 GHz, was used as an example. A range of antennas were designed, manufactured and tested. These used conventional printed circuit boards (PCBs) and Gallium Arsenide (GaAs) substrates, operating at a range of frequencies from 2.4 GHz to 12 GHz. A …
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Investigation of Integrated Decoupling Methods for MIMO Antenna Systems. Design, Modelling and Implementation of MIMO Antenna Systems for Different Spectrum Applications with High Port-to-Port Isolation Using Different Decoupling Techniques
… spectrum bandwidths for WLAN (2.4/5.2/5.8 GHz) and WiMAX (3.5 GHz) applications. These designs employ a combination of DGS and neutralization line methods to reduce the coupling caused by the surface current in the ground plane and between the radiating antenna elements. The minimum …
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Investigation of Integrated Decoupling Methods for MIMO Antenna Systems. Design, Modelling and Implementation of MIMO Antenna Systems for Different Spectrum Applications with High Port-to-Port Isolation Using Different Decoupling Techniques
… spectrum bandwidths for WLAN (2.4/5.2/5.8 GHz) and WiMAX (3.5 GHz) applications. These designs employ a combination of DGS and neutralization line methods to reduce the coupling caused by the surface current in the ground plane and between the radiating antenna elements. The minimum …
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Free-Space Measurements of Dielectrics and Three-Dimensional Periodic Metamaterials
… horn antennas with bandwidth from 5.8 GHz to 110 GHz, which are connected to a HP PNA series network analyzer. The dielectric lenses focus the incident beam to a footprint measuring 1 wavelength by 1 wavelength. The sample holder is positioned at the focal point between the two …
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A Numerical Parametric Study on the Performance of a Low Profile dipole Planar Inverted Cone Antenna Placed over an Electromagnetic Bandgap Structure
… large (4.5:1), the broadside minimum at 4 GHz improved by 13.29 dB, but the pattern bandwidth decreased to 3.4:1 .The patch width, gap width, and via diameter were all varied, and It was revealed that each parameter sweep only minimally changed the impedance match and affected only the …
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Circuit design and technological limitations of silicon RFICs for wireless applications
… at the device level. Working toward a 5.8 GHz receiver consistent with 1 GBit/s operation, signal path topologies and adjustable biasing circuits are developed for low-noise amplifiers (LNAs) and voltage-controlled oscillators (VCOs) to provide a facility by which power can be conserved …
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Low-power dual-band on-body antenna for wireless body sensor networks
… thesishaving a dual-frequency operation at 2.45 GHz and 5.8 GHz. The proposed antennas are optimized to maximize the Signal-to-Noise-Ratio (SNR) and, hence, to minimize the BER and the Specific Absorption Rate (SAR) in the human tissues. In this thesis, a semi-analytic rigorous technique for the …
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Characterization of Radio Emission from Young Stellar Objects
… redux, the 150 MHz TIFR GMRT Sky Survey, the 1.4 GHz NRAO VLA Sky Survey, and the 3 GHz VLA Sky Survey, as well as a targeted large program of 66 young stellar systems with the Disks@EVLA project at 5.8 GHz, 21 GHz, 34 GHz, and 41 GHz. These findings are analyzed in the context of possible …
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Investigation and design of 5G antennas for future smartphone applications
… for 8×8 MIMO configuration is proposed for sub 6 GHz 5G applications. The proposed MIMO configuration could improve the channel capacity, diversity function, and multiplexing gain of the smartphone antenna system which makes it suitable for 5G applications. Different types of new and compact …
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Propagation channel models for 5G mobile networks. Simulation and measurements of 5G propagation channel models for indoor and outdoor environments covering both LOS and NLOS Scenarios
… investigated at four different frequencies; 5.8 GHz, 26GHz, 28GHz and 60GHz for vertical polarized directional, omnidirectional and isotropic antennas patterns. The computed data achieved from the 3-D Shooting and Bouncing Ray (SBR) Wireless Insite based on the effect of frequency dependent …
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Simulation, Design and Implementation of Antenna for 5G and beyond Wave Communication. Simulation, Design, and Measurement of New and Compact Antennas for 5G and beyond and Investigation of Their Fundamental Characteristics
… most critical challenges. As a result, for sub-6 GHz 5G applications, a new design technique based on dual-polarised antenna resonators for 6-Element, 8-Element MIMO configuration is proposed. The proposed MIMO design could improve the smartphone antenna system's chan-nel capacity, diversity …
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Low Profile, Printed Circuit, Dual-Band, Dual-Polarized Antenna Elements and Arrays
… unlicensed operation is permitted. The 2.45 GHz and 5.8 GHz ISM bands are commonly used for applications including Bluetooth technology, multiple 801.11 protocol, cellular phone technology, and cordless phones. The ISM bands were chosen for this antenna element due to their popularity, but …