Wi-Fi Reach
Due to reach requirements for wireless LAN applications, power consumption is fairly high compared to some other low-bandwidth standards. Especially Zigbee and Bluetooth supporting wireless PAN applications refer to much lesser propagation range of <10m (ref. e.g. IEEE Std. 802.15.4 section 1.2 scope). Range is always making battery life a concern.
Wi-Fi networks have limited range. A typical Wi-Fi home router using 802.11b or 802.11g with a stock antenna might have a range of 32 m (120 ft) indoors and 95 m (300 ft) outdoors. Range also varies with frequency band. Wi-Fi in the 2.4 GHz frequency block has slightly better range than Wi-Fi in the 5 GHz frequency block. Outdoor range with improved (directional) antennas can be several kilometres or more with line-of-sight.
Wi-Fi performance decreases roughly quadratically as the range increases at constant radiation levels.
Wi-Fi networks have limited range. A typical Wi-Fi home router using 802.11b or 802.11g with a stock antenna might have a range of 32 m (120 ft) indoors and 95 m (300 ft) outdoors. Range also varies with frequency band. Wi-Fi in the 2.4 GHz frequency block has slightly better range than Wi-Fi in the 5 GHz frequency block. Outdoor range with improved (directional) antennas can be several kilometres or more with line-of-sight.
Wi-Fi performance decreases roughly quadratically as the range increases at constant radiation levels.
posted by loseword at 2:13 AM
1 Comments:
The scope of 15.4, as you mentioned, was set at below 10 meter range to make sure that the 802.11 folks would not feel threatened %^). Any decent 802.15.4 product with a printed board trace for an antenna should give you >150m outdoors and >40m indoors. Freescale's MC13224 ARM-based 15.4 transceiver with a printed F antenna has been demonstrated to go upwards of 300-400m outside and 50-75m inside a typical office building.
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