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Showing 1 to 18 of 18 for “"PIFA"”.
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Broadband PIFA Rectenna Design for a Multi-Source Energy Harvesting Device
… of a broadband Planar Inverted-F Antenna (PIFA) constructed for energy harvesting and its integration with a solar cell. An assessment of available ambient RF energy was performed by surveying power density levels from 700MHz to 18GHz. The measured spectrum was then used to determine the …
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Development of triple band planar inverted F-antenna (PIFA) for GSM 800 MHz, DCS 1800 MHz and Bluetooth 2400 MHz
A triple band Planar Inverted F-Antenna (PIFA) antenna for GSM900, DCS1800 and Blutooth2400 is presented. The antenna consists of square planar radiating patch with dual L-shaped slots suspended above the FR4 dielectric substrate. A shorting plate is employed between the top patch and the ground …
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Design and comparative performance evaluation of novel mobile handset antennas and their radiative effects on users.
… are desirable. The Planar Inverted-F Antenna (PIFA) is shown to result into low SAR values and high efficiency when operating in the proximity of the user. Despite these advantages, PIFA is also characterised by narrow bandwidth that limits its practical use. The first part of this work is …
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STUDY OF MULTI- AND BROAD-BAND INTERNAL ANTENNAS FOR MOBILE APPLICATIONS
… Antenna (MSA) and Planar Inverted F Antenna (PIFA) for mobile applications are studied and presented in this dissertation. The designed antennas are improved multi-band and broad-band characteristics by the modification of radiating elements and/or the ground plane. The novel modified aperture …
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A Numerical and Experimental Investigation of Planar Inverted-F Antennas for Wireless Applications
… thorough numerical study on the performance of a PIFA with various ground planes sizes and shapes is reported. Finally, a new wideband compact PIFA antenna (WC-PIFA) is proposed. Preliminary work is presented along with numerical and experimental results for various environments such as free …
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Low Profile Integrated GPS and Cellular Antenna
… different bands. The planar inverted F antenna, PIFA, meets the specifications which are required in a reduced size environment. The PIFA is capable of achieving a bandwidth of 8% in the cellular band. The GPS portion of the hybrid unit consists of a dielectrically loaded patch located in a …
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A Nonlinear Technique for Bandwidth Improvement in Narrowband Antennas
… (ILA), and the Planar Inverted-F antenna (PIFA).Next, the analysis and the methodology leading to results are discussed and simulated results are presented. Simulated results show that the PIFA is able to achieve a higher bandwidth with a loaded nonlinear element. However, it is difficult …
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Investigation of Low Profile Antenna Designs for Use in Hand-Held Radios
… Antenna (IFA), Planar Inverted-F Antenna (PIFA), and Dual Inverted-F Antenna (DIFA) is included. Two specific antenna designs are presented: the DIFA and the Proximity-Coupled Rectangular Patch MSA. The radiation patterns and input impedance of the DIFA are calculated numerically and …
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Embedded Antennas In Concrete For Application In Wireless Sensors
… a dipole, a loop, a microstrip patch and a PIFA were designed and analyzed for embedded operation inside concrete. Through antennas have been deeply studied in free space, there is little literature about their performance inside concrete environment. We studied their characteristics inside …
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INVESTIGATIONS OF HYPERVALENT IODINE COMPOUNDS IN ORGANIC TRANSFORMATIONS
… research on the oxidative cleavage of C=C with PIFA/water. In the presence of a small amount of water in acetonitrile at 65-70 oC, [bis(trifluoroacetoxy)iodo]benzene (PIFA, 26) converts styrenes into benzaldehydes in good to high yields. Contrary to literature description that electron-rich …
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Modelling and design of compact wideband and ultra-wideband antennas for wireless communications. Simulation and measurement of planer inverted F antennas (PIFAs) for contemporary mobile terminal applications, and investigations of frequency range and radiation performance of UWB antennas with design optimisation using parametric studies.
… of MIMO/diversity Planar Inverted-F antenna (PIFA) which is suitable for pattern diversity in UWB applications is presented. This antenna assembly is formed by two identical PIFAs, a T-shaped decoupling structure which connects the two PIFAs and a finite ground plane with a total compact …
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Synthesis of N-Heterocycles and Thiocines via Electrophilic Divalent Reactive Intermediates
… aryl amines to either 1.1 equivalents of PIFA or PhIO at room temperature triggered iminoiodinane formation, followed by C–NAr bond formation to yield dibenzazepines. The use of hypervalent iodine reagents motivated me to examine the possibility of using the same reactivity to achieve …
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Investigation and design of 5G antennas for future smartphone applications
… with Patch, Slot, and Planar inverted F antenna (PIFA) resonators are studied for different candidate bands of sub 6 GHz spectrum such as 2.6, 3.6, and 5.8 GHz. Unlike the reported MIMO antennas, the proposed designs provide full radiation coverage and polarization diversity with sufficient gain …
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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
… Patch, Slot, and Planar inverted F antenna (PIFA) resonators are examined. Unlike previously reported MIMO antennas, the proposed designs provide full radiation coverage and polarisation diversity, as well as adequate gain and efficiency values to support several mainboard sides. Apart from …
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Synthetic Studies Towards the Crisamicins
… such as phenyliodine(III) bis(trifluoroacetate) (PIFA), phenyliodine(III) diacetate (PIDA), polymer-supported (diacetoxyiodo)benzene (PSDIB), Fremy's salt, iron trichloride or CrO3.
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Analysis and design of compact low profile antennas for fixed volume applications
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-01-10T20:26:15Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 VanNiekerk_Carlo.pdf: 26003010 bytes, checksum: 915d921e86907a553b17985392559c1a (MD5)