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 architecture

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

WiFi, MiFi, LiFi, Super WiFi related links

LiFi tutorial
MiFi vs WiFi
LiFi vs WiFi
Super WiFi
IEEE 802.11af WLAN tutorial
Difference between 802.11af and 802.11ah

what is difference between

difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
Bluetooth vs zigbee
Fixed wimax vs mobile

RF and Wireless Terminologies