Bio: A.T. Arkko is an academic researcher from Nokia. The author has contributed to research in topics: Folded inverted conformal antenna & Patch antenna. The author has an hindex of 1, co-authored 1 publications receiving 33 citations.
••01 Jan 2003
TL;DR: In this paper, the free space performance of a commonly used planar inverted-F antenna (PIFA) on top of various rectangular ground planes is studied by simulations and the effect of the ground plane size on the performances of multiband antennas comprised of different combinations of selected frequency bands are discussed.
Abstract: In this paper the free-space performance of a commonly used planar inverted-F antenna (PIFA) on top of various rectangular ground planes is studied by simulations. Special attention is given to impedance bandwidth and antenna efficiency. The study is carried out for five frequency bands; CDMA800, GSM900, GSM1800, GSM1900 and UMTS. Optimal ground plane dimensions for each frequency band are given and performance results for selected bands are shown as a function of the ground plane dimensions. Finally effect of the ground plane size on the performances of multiband antennas comprised of different combinations of selected frequency bands are discussed.
•31 Mar 2011
TL;DR: Diperluas dan diperbarui, panduan praktis ini adalah referensi desain lengkap ying berisi semua kebutuhan insinyur saat mendesain antena======¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯Mengintegrasikan teknologi canggih dengan bagian khusus untuk desain, pengukuran, and persyaratan antena MIMO======¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯Dapat diakses oleh p
Abstract: Diperluas dan diperbarui, panduan praktis ini adalah referensi desain lengkap yang berisi semua kebutuhan insinyur saat mendesain antena Mengintegrasikan teknologi canggih dengan bagian khusus untuk desain antena langkah demi langkah Menampilkan kepatuhan regulasi bio-keselamatan dan kompatibilitas elektromagnetik terbaru dan standar terbaru Baru diperbarui dengan desain, pengukuran, dan persyaratan antena MIMO Dapat diakses oleh pembaca dari berbagai tingkatan, dari pengantar hingga spesialis Ditulis oleh seorang ahli praktik yang telah mempekerjakan dan melatih banyak insinyur
TL;DR: In this article, a single-feed quad-band planar inverted F-antenna (PIFA) is presented, where U-shaped slits are inserted within the antenna-radiating surface to reduce the resonant frequency.
Abstract: In this paper, a novel compact single feed quad-band planar inverted F-antenna (PIFA) is presented. Two techniques to reduce the physical size are illustrated. First, we insert U-shaped slits within the antenna-radiating surface. This forces the current to flow around the obstacles hence, reducing the resonant frequency. This technique reduces the size by about 30% from the original PIFA. Second, a capacitive plate is loaded between the radiating surface and the ground plane. The size is reduced more to reach 55% of the original. The relation between the capacitance load value and the antenna size reduction ratio is studied. Using different U-shaped slits at different appropriate positions, multiple (dual, tri, and quad) band capabilities are realized. The four center frequencies are chosen to lie within the GSM band, DCS band, Bluetooth (IEEE802.11a) ISM band, and WLAN (IEEE802.11b) band, respectively. Foam dielectric substrate is used for rigid structure and easy shielding purposes. The reduced size and thin substrate thickness (h<0.15/spl lambda//sub 0/) allow the design to be compatible with wireless and portable communication systems. Experimental measurements verify the design and simulation criteria.
TL;DR: In this paper, a novel technique for enhancing the impedance bandwidth of wireless terminal antennas is presented by introducing resonant short circuit transmission lines to the long sides of the chassis edges, an effective electrical shortening of the terminal ground plane is achieved.
Abstract: A novel technique for enhancing the impedance bandwidth of wireless terminal antennas is presented. By introducing resonant short circuit transmission lines to the long sides of the chassis edges, an effective electrical shortening of the terminal ground plane is achieved. This effect has been used to realize terminal ground planes with resonant lengths at high frequencies, such as GSM 1800/1900 MHz or UMTS 2 GHz, thereby extending the impedance bandwidth. The proposed technique has been validated by simulations and measurements. Three typical applications are presented where the introduction of wavetraps improves the bandwidth and/or in-band performance
31 Jul 2008
TL;DR: This presentation discusses the development of Multiband Handset Antennas for MIMO Systems, and some of the techniques used to develop these devices and their applications.
Abstract: Get the very latest details on the cutting-edge antennas that will be integrated in complex 4th generation wireless communications systems with this first-of-its-kind volume. Written by a panel of leading experts in the field, the book serves as a comprehensive, one-stop resource, including in-depth coverage of multiband integrated antenna design, simulation, testing and manufacturing. This practical book helps you solve integration problems for ever-increasing multiband requirements. You find discussions on important considerations regarding future handset MIMO terminals, such as efficiency and the effect of the user. The book also shows you how to avoid tweaking for fractal multiband designs and printed dipole design. Moreover, you learn how to identify and choose suitable multiband techniques for a particular MIMO handset. Supported with over 100 illustrations, this forward-looking resource presents the most recent design developments in the field, so you don't need to spend valuable time searching through scattered journal articles for the details you need. List of Contributors: Yahya Rahmat-Samii, UCLA, USA; Steven R. Best, MITRE, USA; Kevin Boyle, NXP Semiconductors, UK; Manos M. Tentzeris, Bo Pan and RongLin Li, Georgia Institute of Technology, USA; Wojciech Krzysztofik, Wroclaw University of Technology, Poland; Marta Martinez-Vazquez, IMST, Germany; Marta Cabedo-Fabres, Universidad Politecnica de Valencia, Spain; Eva Antonino-Daviu, Universidad Politecnica de Valencia, Spain; Juan F. Valenzuela-Valdes, EMITE Ing., Spain; Antonio M. Martinez-Gonzalez, Universidad Politecnica de Cartagena, Spain; David A. Sanchez-Hernandez, Universidad Politecnica de Cartagena, Spain; Gert F. Pedersen, Aalborg University, Denmar; Jesper A. Nielsem, Aalborg University, Denmark.
TL;DR: In this paper, the authors present a comprehensive numerical and experimental study of Planar Inverted-F Antennas (PIFA) involving all the parameters which may affect the characteristics of PIFA.
Abstract: This paper presents a comprehensive numerical and experimental study of Planar Inverted-F Antennas (PIFA) involving all the parameters which may affect the characteristics of PIFA. It is found that PIFA characteristics are affected by a number of parameters including the dimensions of the ground plane, length, width, height and position of the top plate, positions and widths of shorting pin/plate and feed pin/plate. It is also found that the width of feed plate plays an important role in broadening the antenna bandwidth. It is shown that a fractional impedance bandwidth up to 65% can be obtained using an optimized design. Furthermore, a new empirical formula is introduced for the estimation of the central operational frequency of PIFA. These results are very useful for aiding PIFA design in practical applications.