What is Passive wifi | Difference between Passive WiFi and traditional WiFi
This page compares passive wifi vs traditional WiFi and mentions difference between Passive WiFi and Traditional WiFi technologies.
We know that traditional wifi system uses more power due to analog RF circuits. Passive WiFi employs digital baseband in the devices such as smartphones and tablets while analog RF circuits are located in a single plugged in device. This is shown in the figure. Due to this it reduces power consumption to a great extent.
Passive WiFi eliminates use of analog RF and hence battery in the smartphones or tablets can last for longer duration. As shown in the passive WiFi architecture, passive wifi network consists of single plugged-in device and one or more passive wifi devices.
Following table mentions comparison between passive wifi and traditional wifi technologies.
| Specifications | Passive Wifi | Traditional Wifi |
|---|---|---|
| Distance coverage | 10 to 30 meters (in LOS and through wall scenarios) | 100 meters |
| Power Usage | 10000 times less compare to traditional wifi | Higher compare to passive wifi |
| Data Rate | About 11 Mbps in the downlink | Supports 802.11b (2.4GHz, 11Mbps) and 802.11g (2.4 GHz, 54Mbps), 100 Mbps (11n) to Gbps (11ad) |
| Sharing of network | In passive wifi network, single plugged in device does the carrier sense and informs all the passive wifi devices to transmit or not. | All the WiFi devices share the network with the help of carrier sense mechanism |
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