Are you H. Usui?

Claim your profile

Publications (2)1.38 Total impact

  • [show abstract] [hide abstract]
    ABSTRACT: this paper is to highlight the specific design challenges associated with antenna integration into laptops. These challenges are illustrated through practical design examples, including suggested test and integration methodology to solve the problems outlined below. Copyright 2003 by International Business Machines Corporation. Copying in printed form for private use is permitted without payment of royalty provided that (1) each reproduction is done without alteration and (2) the Journal reference and IBM copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free without further permission by computer-based and other information-service systems. Permission to republish any other portion of this paper must be obtained from the Editor
    Ibm Journal of Research and Development 05/2003; · 0.69 Impact Factor
  • [show abstract] [hide abstract]
    ABSTRACT: The design, development, testing, and integration methodology for antennas integrated into laptop computers is described. Two key parameters are proposed and discussed for laptop antenna design and evaluation: standing wave ratio (SWR) and average antenna gain. A novel averaging technique was developed and applied to these to yield a measurable, repeatable, and generalized metric. A prototype antenna was built using this methodology, and measurements indicate that the resulting design attains both performance and cost targets. A PC-card-version wireless system is also discussed and compared with the integrated one. The impact of the antenna on the overall wireless system is studied through a link budget model.
    Ibm Journal of Research and Development 04/2003; · 0.69 Impact Factor