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Z-Wave is a wireless communications protocol used primarily for residential and commercial building automation. It is a mesh network using low-energy radio waves to communicate from device to device, [2] allowing for wireless control of smart home devices, such as smart lights, security systems, thermostats, sensors, smart door locks, and garage door openers.
Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and other low-power low-bandwidth needs, designed for small scale projects which need wireless connection.
Similarly to DECT, ULE uses a dedicated radio frequency, outmatching other technologies, such as Zigbee, Z-Wave, Bluetooth and others in terms of stability. Primary application areas of ULE based wireless networks are for home automation, home security and climate control. Each of these application areas represent variety of dedicated devices.
ANT was designed for low-bit-rate and low-power sensor networks, in a manner conceptually similar to (but not compatible with) Bluetooth Low Energy. [3] This is in contrast with normal Bluetooth, which was designed for relatively high-bit-rate applications such as streaming sound for low-power headsets.
Z 0 is the ratio of the complex voltage of a given wave to the complex current of the same wave at any point on the line. Typical values of Z 0 are 50 or 75 ohms for a coaxial cable , about 100 ohms for a twisted pair of wires, and about 300 ohms for a common type of untwisted pair used in radio transmission.
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