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Showing 1 to 20 of 21 for “"Inverted-F"”.
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A Numerical and Experimental Investigation of Planar Inverted-F Antennas for Wireless Applications
… on the microstrip antennas (MSA) and planar inverted-F antennas have been used for handheld wireless devices because these antennas have low-profile geometry and can be embedded into the devices. New wireless applications requiring operation in more than one frequency band are emerging. …
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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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Investigation of Low Profile Antenna Designs for Use in Hand-Held Radios
… Antenna (MSA) theory, and the theory of the Inverted-L Antenna (ILA), and variations on the ILA including the Inverted-F 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 …
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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.
… printed crescent shape monopole antenna, Planar Inverted F-L Antenna (PIFLA) and Planar Inverted FF Antenna (PIFFA) are focused. A Planar Inverted FF Antenna (PIFFA) can be created to reduce the potential for interference between a UWB system and other communications protocols by using spiral …
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STUDY OF MULTI- AND BROAD-BAND INTERNAL ANTENNAS FOR MOBILE APPLICATIONS
… coupled MicroStrip 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 …
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A Nonlinear Technique for Bandwidth Improvement in Narrowband Antennas
… is studied, including the pros and cons of the Inverted-F antenna (IFA), Inverted-L antenna (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 …
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Active Antenna Bandwidth Control Using Reconfigurable Antenna Elements
… ring patch, the reconfigurable planar inverted-F and the reconfigurable parasitic folded dipole. The relevant background work to these designs is described and then design details along with computer simulations and measured experimental results are given.
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Broadband PIFA Rectenna Design for a Multi-Source Energy Harvesting Device
… simulation and fabrication 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 …
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Energy storage in reconfigurable antennas
… structures, including a frequency-reconfigurable inverted-F antenna. The use of energy storage modes is found to simplify the task of designing effective electrically small and mid-sized reconfigurable antennas.
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An analysis of the bandwidth oscillations caused by finite ground planes using characteristic mode theory
… known that the impedance bandwidth for planar inverted-F antennas (PIFAs) changes as the rectangular ground plane changes length. Although previous research has characterized these changes, it has failed to adequately explain why the bandwidth and pattern changes occur. This thesis explains why …
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Investigation, Design and Implementation of MIMO Antennas for Mobile Phones. Simulation and Measurement of MIMO Antennas for Mobile Handsets and Investigations of Channel Capacity of the Radiating Elements Using Spatial and Polarisation Diversity Strategies.
… structure. Using this method, a triple dual-band inverted-F antenna system is presented and considered for MIMO application. Means of achieving minimum coupling between the three antennas are investigated over the 2.45 GHz and 5.2 GHz bands. A new 2 2 MIMO dual-band balanced antenna handset, …
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Design and comparative performance evaluation of novel mobile handset antennas and their radiative effects on users.
… losses by the user 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 …
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Investigation and design of 5G antennas for future smartphone applications
… MIMO antennas 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 …
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Design, Investigation and Implementation of Hetrogenous Antennas for Diverse Wireless Applications. Simulation and Measurement of Heterogeneous Antennas for Outdoor/indoor Applications, including the Design of Dielectric Resonators, Reconfigurable and multiband DR antennas, and Investigation of Antenna Radiation Performance and Design Optimization
… are covered in this thesis. A wideband double inverted-F antenna is designed and examined to overcome signal attenuation issues. The obtained result is feasible, which has an operating bandwidth of 0.8 to 2.17GHz, with a reflection coefficient better than 10 dB. Moreover, a field trial is …
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Electrically-Small Antenna Performance Enhancement for Near-Field Detuning Environments
… The structure is an extension of the planar inverted-F antenna with the addition of a capacitance-coupled parasitic to enhance reliable operation in unknown environments.
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Low Profile Integrated GPS and Cellular Antenna
… operate at the two 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 …
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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
… MIMO antennas using 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 …
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Tunable Impedance Matching Network Fundamental Limits and Pracitical Considerations
… 3 dB improvement in power delivered to a planar inverted-F antenna and up to 4–5.6 dB improvement in power delivered to the iPhone™ antenna. Additionally, a single-varactor matching network is measured to achieve greater tuning range than a two-varactor matching network (> 824–960 MHz versus …
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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)
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Design, modelling and implementation of antennas using electromagnetic bandgap material and defected ground planes
The main objective of this research is to design, model and implement several antenna geometries using electromagnetic band gap (EBG) material and a defected ground plane. Several antenna applications are addressed with the aim of improving performance, particularly the mutual coupling between the …
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