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(1) (UNique Ingredient Identifier) See healthcare IT.

(2) (Unlicensed-National Information Infrastructure) A part of the national spectrum sanctioned by the FCC in 1997 that does not require a license for short-range wireless use. One of the purposes for U-NII was to enable schools, libraries and healthcare organizations in rural areas to more easily connect to the Internet and private, high-speed networks.

Radar Has Priority
U-NII channels 52 through 140 (5.26-5.7 GHz) require transmitting devices to use dynamic frequency selection (DFS) to avoid conflicts with radar pulses. A DFS frequency must be clear of radar for one minute before using it, and if radar is detected on the current channel, the transmitter must switch to another channel, also free of radar for one minute. See ISM band and WiSA.

U-NNI BANDSIndoor/  MaxFrequency     Outdoor  PowerRange (GHz)   Usage    (mW)  DFS?

 5.150-5.250   In       50    no

 5.250-5.350   In/Out  250    yes

 5.470-5.725   In/Out  250    yes

 5.725-5.825   Out    1000    no
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References in periodicals archive ?
Unlike with pulsed radar systems, communication systems such as the U-NII devices have high transmit duty cycles that preclude filtering by single-pulse interference filters like the one implemented in the TDWR (Cho 2011).
2011: Analysis of 5-GHz U-NII device signals received by the PSF TDWR.
As stated, U-NII devices are unlicensed intentional radiators that operate in the frequency bands 5.
The initiation of this proceeding satisfies the requirements of Section 6406 (a) of the "Middle Class Tax Relief and Job Creation Act of 2012" which required the Commission to begin a proceeding to modify part 15 of title 47, Code of Federal Regulations, to allow unlicensed U-NII devices to operate in the 5350-5470 MHz band.
With the former, the U-NII and an expansion of the same principles to ultra wideband devices that would operate underneath many licensed services provide the obvious example.
The abbreviation stands for "Unlicensed-National Information Infrastructure," and reflects the Commission's aspiration that the U-NII Band could provide a part of the local infrastructure for the information infrastructure, either replacing LANs or providing a potential local loop for community networks.
Until new U-NII equipment is certified and meets revised FCC rules, the database solution will be employed to facilitate coordination between U-NII band device users and the FAA's TDWR sites.
With the launch of this UDIA database solution, equipment manufacturers and the wireless industry expect the certification of new U-NII equipment to be reinvigorated.
Mitsubishi, GaAs FET, PCS, GSM, CDMA, TDMA, W-CDMA, U-NII, MMDS, ITFS, AMPS, SMD, SMT, fixed wireless, microwave, RF, radio frequency.
11a, HiperLAN2, U-NII, and WLAN systems in Japan -- Performance, small size, broadband cited -- On-chip power detectors simplify design-in