Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1999-03-03
2001-07-24
Maung, Nay (Department: 2681)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S090300, C455S575100, C343S702000, C343S767000
Reexamination Certificate
active
06266538
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to antennas for use with mobile telephones.
2. Description of the Related Art
The design of antennas for mobile telephones capable of operation in more than one frequency band (dual mode) is constrained by the market demand continually to reduce the overall size of telephones. An antenna for a foldable telephone, or “flip” phone as it called, will need to be especially compact while still being capable of providing satisfactory performance.
A typical foldable phone comprises two main sections connected by a hinge mechanism. When such a telephone is in the closed position, performance of the antenna must be sufficient to enable the satisfactory reception of incoming signals. The phone is normally used in the opened position, but incoming calls as well as text and data messages must be received when the phone is in the closed position.
SUMMARY OF THE INVENTION
It is an object of this invention to provide an antenna for use with a folding mobile phone having satisfactory performance in both the normal operating position and the standby position.
According to this invention, there is provided a dual mode antenna for use with a folding mobile phone, which is switched between the normal operating position and the standby position. In the normal operating position, the antenna acting as a monopole comprises a planar conducting sheet in combination with a slotted plate. And in the standby position the antenna comprises said slotted plate acting as a slot antenna with the planar conducting sheet forming a reflector.
Conveniently the top section of the phone will include a window for providing viewing access to a display screen or direct access to part of a keypad when the phone is in the closed position. The display screen and keypad would usually be located in the bottom section of the phone.
Preferably the antenna will be incorporated into the phone so that the antenna is out of sight of the user.
The above and other objects, features and advantages of present invention will become apparent from the following description with reference to the accompanying drawings which illustrate examples of the present invention.
REFERENCES:
patent: 5337061 (1994-08-01), Pye et al.
patent: 5451965 (1995-09-01), Matsumoto
patent: 5542106 (1996-07-01), Krenz et al.
patent: 5809403 (1998-09-01), MacDonald, Jr. et al.
patent: 5945954 (1999-08-01), Johnson
patent: 5995052 (1999-11-01), Sadler et al.
Davis Temica M.
Maung Nay
NEC Corporation
Sughrue Mion Zinn Macpeak & Seas, PLLC
LandOfFree
Antenna for the folding mobile telephones does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antenna for the folding mobile telephones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna for the folding mobile telephones will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2552605