Resources Contact Us Home
Indoor mobile communication device

Image Number 5 for United States Patent #7110719.

It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable communication with a small fading effect. In order to attain this object, the present invention provides an indoor mobile communication device which is equipped with an antenna with fixed direction characteristics such as electromagnetic wave emission direction and half-power angle and is capable of mobile communications, while freely changing the position and direction inside an indoor space, this device comprising an antenna for transmission and reception of linearly polarized waves, the antenna having a half-power angle within 180 degrees and a directivity such that the emission level within a range of from 90 degrees to 270 degrees, as measured from the maximum emission direction, is less than the maximum emission level by 10 dB or more and a wireless unit for conducting modulation and demodulation of the signals superimposed on the electromagnetic waves transmitted and received via the antenna.

  Recently Added Patents
Glow in the dark swim goggle frame and band
Highly specialized application protocol for email and SMS and message notification handling and display
Dual protocol input device
Locking flange
Control method of LPI lamp for LPI vehicle and logic therefor
Digital broadcast receiver and method for processing caption thereof
Engineered nucleic acids encoding a modified erythropoietin and their expression
  Randomly Featured Patents
Disk player using a single motor in common for driving its tray and optical pickup
Homogeneous K-FGF and use of the same
Siloxane polysulfide usable as cross-linking agent, and process for obtaining such
Sunscreen for motor vehicles
Intake device for use with internal combustion engines
Mediator systems based on mixed metal complexes, used for reducing dyes
Circuit arrangement for capacitive humidity measurement and method for operating the same
Geranium plant named `Guilan`
Turbine tip clearance measurement
Method for electrolytically tin plating articles