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
Reactor core of liquid metal cooled reactor
Rose plant named `ESM R057`
Portable device for treating insect bites and the like
Method and system for routing telephony communications together with modified calling party identifier information
Signal activated molecular delivery
Pharmaceutical dosage form
Liquid-level sensor
  Randomly Featured Patents
Management of physical media volumes in partitions of an automated data storage library
Holder for a personal razor
Modular fuel injector with a spiral damper member and method of reducing noise
Combined squeeze bottle and carrier
Semiconductor optical device
Production of opioid analgesics
Goods-wrapping apparatus including a printer
Seashore sandal
Magnetooptical recording and playback method employing multi-layer recording medium with record holding layer and playback layer
Portable power saw