Author
Jaume Anguera
Other affiliations: La Salle University
Bio: Jaume Anguera is an academic researcher from Ramon Llull University. The author has contributed to research in topics: Antenna (radio) & Microstrip antenna. The author has an hindex of 34, co-authored 174 publications receiving 3726 citations. Previous affiliations of Jaume Anguera include La Salle University.
Papers published on a yearly basis
Papers
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TL;DR: In this article, a multiband handset antenna combining a PIFA and multiple slots on a ground plane is presented, and it is shown by means of simulations that the slots on the ground plane have a double function: to tune ground plane resonance at low frequencies and to act as parasitic radiators at high frequencies.
Abstract: A multiband handset antenna combining a PIFA and multiple slots on a ground plane is presented. It is shown by means of simulations that the slots on the ground plane have a double function: to tune the ground plane resonance at low frequencies (f ? 900 MHz) and to act as parasitic radiators at high frequencies (f ? 1800 MHz). A prototype is designed and built featuring a behavior suitable for low frequencies (GSM850 and GSM900) and for high frequencies spanning from DCS1800 to Bluetooth, and including, for instance, PCS1900, UMTS2000, and other possible systems. Reflection coefficient, efficiency, and radiation patterns are measured and compared with a design without slots to prove the advantages of the slotted ground plane. The component effect is investigated to determine critical areas where the placement is not recommended. Besides, the effect of the slot of the ground plane on SAR is investigated, by discussing the effect of the ground plane and slot modes for two phone positions. The total antenna volume of the proposed design is 40 × 15 × 6 mm3.
225 citations
15 Apr 2005
TL;DR: The combination of fractal geometry with electromagnetic theory opens an interesting window for research to find new antenna designs and applications Fractal technology applications can be divided into six main groups: (1) multifrequency antenna elements, frequency-selective surfaces, and arrays; (2) electrically small antennas; (3) high-directivity radiating elements; (4) low-sidelobe arrays, (5) undersampled arrays; and (6) fast computational methods as discussed by the authors.
Abstract: The combination of fractal geometry with electromagnetic theory opens an interesting window for research to find new antenna designs and applications Fractal technology applications can be divided into six main groups: (1) multifrequency antenna elements, frequency-selective surfaces, and arrays; (2) electrically small antennas; (3) high-directivity radiating elements; (4) low-sidelobe arrays; (5) undersampled arrays; and (6) fast computational methods This article reviews most of the work done in the fractal technology field covering the last six fields
Keywords:
fractal;
antennas;
multifrequency;
arrays;
small antennas;
arrays;
microstrip antennas;
broadband;
high-directivity
151 citations
TL;DR: A description of the evolution of wireless handheld devices, regulations, challenges in today’s smartphones, and handset characterization is reviewed and recent advances in antenna technology for wireless handheld or portable devices are presented.
Abstract: The constant evolution of wireless handheld devices together with the apparition of multiple wireless communication systems fosters the antenna community to design new radiating and measurements systems capable of satisfying the market demands. It is an object of the present paper to provide an overview of the evolution that wireless handheld technology has experienced in the last years. In this sense, a description of the evolution of wireless handheld devices, regulations, challenges in today’s smartphones, and handset characterization is reviewed. Finally, recent advances in antenna technology for wireless handheld or portable devices are presented.
140 citations
TL;DR: In this paper, a dual-frequency antenna based on the Sierpinski fractal with two parasitic patches to enhance the impedance bandwidth is presented, which has been designed using a method of moment commercial code and has been experimentally tested, obtaining two bands with a broad bandwidth and similar radiation patterns.
Abstract: A dual-frequency antenna based on the Sierpinski fractal with two parasitic patches to enhance the impedance bandwidth is presented. An electrical circuit model formed by RLC resonators is proposed to learn about the antenna physical behavior and to achieve the dual band operation minimizing a trial-and-error numerical/measurement proofs. The antenna has been designed using a method of moment commercial code and has been experimentally tested, obtaining two bands with a broad bandwidth and similar radiation patterns.
138 citations
TL;DR: In this paper, a PIFA-based handset antenna technique combining a parallel excitation of the PIFA and a slot is presented, where the number of frequency bands is given by the sum of bands given per each radiator which can be controlled independently.
Abstract: A handset antenna technique combining a parallel excitation of a PIFA and a slot is presented. The number of frequency bands is given by the sum of bands given per each radiator which can be controlled independently. Component interaction (battery, display, and speaker) is analyzed to determine the best place to mitigate performance degradation. Finally, a concept featuring a small footprint (39 × 11 mm2) and low profile (2 mm) is proposed for multiband operation.
137 citations
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TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.
Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …
33,785 citations
TL;DR: Fractal antenna engineering has been primarily focused in two areas: the first deals with the analysis and design of fractal antenna elements, and the second concerns the application of Fractal concepts to the design of antenna arrays as discussed by the authors.
Abstract: Recent efforts by several researchers around the world to combine fractal geometry with electromagnetic theory have led to a plethora of new and innovative antenna designs. In this report, we provide a comprehensive overview of recent developments in the rapidly growing field of fractal antenna engineering. Fractal antenna engineering research has been primarily focused in two areas: the first deals with the analysis and design of fractal antenna elements, and the second concerns the application of fractal concepts to the design of antenna arrays. Fractals have no characteristic size, and are generally composed of many copies of themselves at different scales. These unique properties of fractals have been exploited in order to develop a new class of antenna-element designs that are multi-band and/or compact in size. On the other hand, fractal arrays are a subset of thinned arrays, and have been shown to possess several highly desirable properties, including multi-band performance, low sidelobe levels, and the ability to develop rapid beamforming algorithms based on the recursive nature of fractals. Fractal elements and arrays are also ideal candidates for use in reconfigurable systems. Finally, we provide a brief summary of recent work in the related area of fractal frequency-selective surfaces.
1,055 citations
Patent•
22 Aug 2011
TL;DR: An encoded information reading (EIR) terminal can comprise a microprocessor, a memory communicatively coupled to the micro processor, an EIR device, a multi-band antenna, and a wireless communication interface as discussed by the authors.
Abstract: An encoded information reading (EIR) terminal can comprise a microprocessor, a memory communicatively coupled to the microprocessor, an EIR device, a multi-band antenna, and a wireless communication interface. The EIR reading device can be provided by a bar code reading device, an RFID reading device, and/or a card reading device. The EIR device can be configured to output raw message data comprising an encoded message and/or output decoded message data corresponding to an encoded message. The wireless communication interface can be configured to support at least two wireless communication protocols. The multi-band antenna can be configured to simultaneously receive two or more radio signals in two or more frequency regulatory domains. The EIR terminal can be configured to dynamically select a wireless communication network and/or a wireless communication protocol by optimizing a value of a wireless communication protocol selection criterion which can be based on said two or more radio signals.
317 citations