Browse Prior Art Database

Optimally Oriented Internal Omnidirectional Antenna Mount for Portable Terminal

IP.com Disclosure Number: IPCOM000118828D
Original Publication Date: 1997-Jul-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Addison, DH: AUTHOR [+5]

Abstract

Disclosed is a method of mounting an antenna on a hand held terminal. It takes advantage of the fact that hand held devices are held at an angle (relative to horizontal) so the user can view the screen. An omnidirectional antenna is mounted on the end of the device opposite from the user, at an angle so that the antenna is vertical when the device is held in the normal position of use (Figure).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Optimally Oriented Internal Omnidirectional Antenna Mount for Portable
Terminal

      Disclosed is a method of mounting an antenna on a hand held
terminal.  It takes advantage of the fact that hand held devices are
held at an angle (relative to horizontal) so the user can view the
screen.  An omnidirectional antenna is mounted on the end of the
device opposite from the user, at an angle so that the antenna is
vertical when the device is held in the normal position of use
(Figure).

The angled mounting of the antenna has multiple benefits:
  o  Enables an inexpensive omnidirectional end-loaded dipole
      antenna to be oriented vertically during use, maximizing
      its effectiveness with vertically polarized radio waves.
  o  Makes the outside of the device appear more sleek and have a
      cleaner appearance design, which is a competitive advantage.
  o  Reduces the volume of empty space required between the dipole
      antenna and the rest of the device's electronics.  A dipole
      cannot simply be placed next to a grounded metal part without
      degrading its function; some separation between the dipole
      and the ground is required.  It turns out that the triangular
      cross section space behind the antenna, shown in the middle
      drawing of the Figure, is close to optimal.