A compact, frequency-reconfigurable filtenna with sharp out-of-band rejection in both its wideband and continuously tunable narrowband states is presented. It is intended for use in cognitive radio applications. The wideband state is the sensing state and operationally covers 2.35-4.98 GHz. The narrowband states are intended to cover communications within the 3.05-4.39 GHz range, which completely covers the Worldwide Interoperability for Microwave Access (WiMAX) band and the satellite communications C-band. A p-i-n diode is employed to switch between these wide and narrowband operational states. Two varactor diodes are used to shift the operational frequencies continuously among the narrowband states. The filtenna consists of a funnel-shaped monopole augmented with a reconfigurable filter; it has a compact electrical size: 0.235 lambda(L) x 0.392 lambda(L), where the wavelength lambda(L) corresponds to the lower bound of its operational frequencies. The measured reflection coefficients, radiation patterns, and realized gains for both operational states are in good agreement with their simulated values.

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第22234号 / 理博第4548号 / 新制||理||1653(附属図書館) / 京都大学大学院理学研究科数学・数理解析専攻 / (主査)教授 望月 拓郎, 教授 大槻 知忠, 教授 加藤 毅 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

京都大学 / 新制・課程博士 / 博士(理学) / 甲第23000号 / 理博第4677号 / 新制||理||1671(附属図書館) / 京都大学大学院理学研究科物理学・宇宙物理学専攻 / (主査)教授 川合 光, 教授 田中 貴浩, 准教授 吉岡 興一 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

This thesis deals with brief research on problematics of antennas in microwave band for omni-directional applications, own design and assembling of such an antenna. The purpose of the design is to have a best possible radiation patterns and reflection loss of our antenna. Conical monopole is chosen and it is simulated and changed to get the best possible parameters. Two prototypes are manufactured with mechanical changes applied and their parameters measured. Finished antenna is used for experimental channel measurement.

No / A miniaturized modified planar inverted-F antenna (PIFA) is presented and experimentally studied. This antenna consists of a planar rectangular monopole top-loaded with a rectangular patch attached to two rectangular plates, one shorted to the ground and the other suspended, both placed at the optimum distance on each side of the planar monopole. The fabricated antenna prototype had a measured impedance bandwidth of 125%, covering 3 to 13GHz for reflection coefficient better than -10 dB. The radiator size was 20 x 10 x 7.5 mm(3), making it electrically small over most of the band and suitable for incorporation in mobile devices. The radiation patterns and gains of this antenna have been cross-validated numerically and experimentally and confirm that this antenna has adequate characteristics for short range ultra-wideband wireless applications.

A novel printed diversity monopole antenna is presented for WiFi/WiMAX applications. The antenna comprises two crescent shaped radiators placed symmetrically with respect to a defected ground plane and a neutralization lines is connected between them to achieve good impedance matching and low mutual coupling. Theoretical and experimental characteristics are illustrated for this antenna, which achieves an impedance bandwidth of 54.5% (over 2.4-4.2 GHz), with a reflection coefficient <;-10 dB and mutual coupling <;-17 dB. An acceptable agreement is obtained for the computed and measured gain, radiation patterns, envelope correlation coefficient, and channel capacity loss. These characteristics demonstrate that the proposed antenna is an attractive candidate for multiple-input multiple-output portable or mobile devices

Yes / This article presents a miniaturized triple-band antenna for Internet of Things (IoT) applications. The miniaturization is achieved by using a split square ring resonator and half ring resonator. The antenna is fabricated on an FR4 substrate with dimensions of (33 × 22 × 1.6) mm3. The proposed antenna resonates at the frequencies 2.4 GHz, 3.7 GHz, and 5.8 GHz for WLAN and WiMax applications. The obtained −10 dB bandwidth for the three bands of the proposed antenna are 300 MHz, 360 MHz, and 900 MHz, respectively. The measured reflection coefficient values of the proposed antenna corresponding to each resonant frequency are equal to −14.772 dB, −20.971 dB, and −28.1755 dB, respectively. The measured gain values are 1.43 dBi, 0.89 dBi, and 1 dBi, respectively, at each resonant frequency. There is a good agreement between the measured and simulated results, and both show an omnidirectional radiation pattern at each of the antenna resonant frequencies that is suitable for IoT portable devices.

International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This student paper was produced as part of the team design competition in the University of Arizona course ECE 485, Radiowaves and Telemetry. It describes the design of a telemetering system for race cars. Auto Racing is an exciting sport where the winners are the ones able to optimize the balance between the driver’s skill and the racing teams technology. One of the main reasons for this excitement is that the main component, the race car, is traveling at extremely high speeds and constantly making quick maneuvers. To be able to do this continually, the car itself must be constantly monitored and possibly adjusted to insure proper maintenance and prevent damage. To allow for better monitoring of the car’s performance by the pit crew and other team members, a telemetering system has been designed, which facilitates the constant monitoring and evaluation of various aspects of the car. This telemetering system will provide a way for the speed, engine RPM, engine and engine compartment temperature, oil pressure, tire pressure, fuel level, and tire wear of the car to be measured, transmitted back to the pit, and presented in a way which it can be evaluated and utilized to increase the car’s performance and better its chances of winning the race. Furthermore, this system allows for the storing of the data for later reference and analysis.

"Mémoire présenté à la Faculté des études supérieures en vue de l'obtention du grade de maîtrise en droit". Ce mémoire a été accepté à l'unanimité et classé parmi les 10% des mémoires de la discipline. / Les provinces canadiennes sont présentement aux prises avec des dépenses élevées en matière de médicaments. Afin de contrôler ces dépenses, plusieurs d'entre elles ont adopté différentes politiques visant à promouvoir et à accélérer la vente de médicaments génériques, lesquels sont équivalents aux médicaments novateurs mais de trente à quarante pourcents moins chers. Le gouvernement canadien, en vertu de son pouvoir de réglementation en matière de brevets, pourrait contribuer aux efforts des gouvernements provinciaux en assouplissant les règles relatives aux brevets pharmaceutiques pour ainsi promouvoir l'accélération de la mise en marché de médicaments génériques. Le gouvernement hésite toutefois à le faire en raison de sa politique en matière de brevets pharmaceutiques dont les effets se veulent équilibrés tant pour l'industrie pharmaceutique novatrice que pour l'industrie du médicament generique. Précisément, cette politique vise, d'une part, à encourager les investissements en recherche et développement par l'industrie novatrice et, d'autre part, à garantir la vente rapide de médicaments génériques au Canada pour que soient contrôlées les dépenses en matière de médicaments. Ce mémoire consiste en un examen du cadre juridique de la politique canadienne en matière de brevets pharmaceutiques. Nous y soulevons et analysons particulièrement ses glissements, quant à l'objectif d'équilibre recherché de la politique canadienne, qui résultent de son application dans le contexte juridique, politique, scientifique et économique actuel. Notre intention est de démontrer que, dans l'intérêt des Canadiens à court et à long terme, la politique canadienne en matière de brevets pharmaceutiques ne doit pas être assouplie en faveur de l'industrie du médicament générique seulement, ceci malgré la croissance des dépenses en matière de médicaments. En effet, l'intérêt des Canadiens ne peut être maximisé que si cette politique est rééquilibrée en tenant compte de l'ensemble de ses glissements juridiques observés. / All Canadian provinces are presently facing increasingly growing drug expenditures. In order to control these expenditures the provinces have adopted different policies to promote and accelerate the sale of generic drugs, these drugs being equivalent to brand-name drugs but thirty to fourthly percent less expensive. Considering its jurisdiction in the field of patents, the Canadian government could contribute to the efforts of the provincial governments in making more flexible the Canadian patent rules, thus promoting the marketing ofgeneric drugs in Canada. The government is however hesitating to do so because of its policy on pharmaceutical patents, which policy aims at balancing the interests of both the brand-name and generic drug industries. Effectively, the purpose ofthe poltey is to promote, on the one hand, the investments in research and development of new drugs in Canada and, on the other hand, to guarantee the rapid marketing of generic drugs, thus controlling drug expenditures. The purpose of this thesis is to examine the judicial framework of the Canadian policy on pharmaceutical patents. Its weaknesses, with regard to the balanced objective of the policy, resulting from its application in the present judicial, political, and economical and scientific context are the focus of this analysis. Our goal is to demonstrate that, to reach the Canadian social benefit, both in the short and long run, the Canadian policy on pharmaceutical patents should not be relaxed for the sole benefit of the generic drug industry, although the drug expenditures are growing. Rather, the social Canadian benefit would only be maximised by re-balancing the Canadian policy in the light of all its demonstrated weaknesses.

In this dissertation, a variety of multiband communication device antennas using the coupling-feed mechanism are presented. The coupling feed contributes additional capacitance to the antenna¡¦s input impedance which shows a high inductive component for the traditional case of using a direct feed. In the first and second antenna designs, with the coupling feed, the high input inductance of the antenna is effectively compensated. This behavior leads to a dual-resonance excitation for the lower band of the antenna. Two wide operating bands are achieved, allowing the antenna¡¦s lower and upper bands to easily cover GSM850/900 and GSM1800/1900/UMTS operation. For the last two antenna designs, owing to the coupling feed, the very large input impedance seen at antenna¡¦s lower band is greatly decreased and results in successful excitation of the one-eighth wavelength (£f/8) mode of the antenna. The specific absorption rate and hearing aid compatibility results for these mobile phone antennas are also analyzed. The effects of presence of the user¡¦s hand on the laptop computer antenna performance are also studied in this dissertation.