II. ATMOSPHERIC EFFECTS ON MOBILE RADIO PROPAGATION The wireless medium introduces dif?cultiesfor communication by its inherent nature. The at-mospheric medium most relevant to terrestrial radio propagation may be speci?edas that of Fig. 3. The troposphere is the ?rstlayer above the surface of the earth, and contains approximately half of

environmental impact is greater than current computing because of the use of batteries. These mobile/wireless devices have become very common in the past few years. Most of these devices work in the radio frequency or microwave range. Radio frequency fields may cause thermal effects at high exposure levels. Expert Group to study the possible impacts of communication towers on Wildlife including Birds and Bees Executive summary India is one of the fastest growing mobile telephony industries in the world. It is estimated that by 2013, 1 billion plus people will be having cell phone connection in India. To Radio and micro waves Non-ionising radiation X-ray radiation Gamma-radiation Ionising radiation Devices using radio waves are all around us in our present-day environ-ment. We use, for example, mobile phones, wireless internet connections and microwave ovens. Watching TV and listening to radio are also based on receiving radio waves. Examples of Radio Environment in the Factories Author(s): Date: 2017-11-07 Name Company email Hasegawa, Akio Advanced Telecommunications Research Institute International (ATR) ahase@atr.jp Sugiyama, Keizo Advanced Telecommunications Research Institute International (ATR) ke-sugiyama@atr.jp Ohsawa, Tomoki BRID Inc. tohsawa@brid.co.jp How does a mobile phone system work? The individual mobile phone operates by communicating with a fixed installation known as a base station or a tele-communications structure. Since the mobile phone and its base station is a two-way radio, they produce radiofrequency (RF) radiation as a means of communicating and expose the people near them to RF Community radi