Allocations

 
U.S. Non-Federal-Government Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


U.S. Federal Government Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION


ITU Region 1 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


ITU Region 2 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


ITU Region 3 Allocations
241 - 248 GHz
RADIO ASTRONOMY
RADIOLOCATION
Amateur
Amateur-satellite


SpectrumWiki

Band Uses (241 - 248 GHz)

Footnotes

5.138   The following bands:

    6 765-6 795 kHz (centre frequency 6 780 kHz),
    433.05-434.79 MHz (centre frequency 433.92 MHz) in Region 1 except in the countries mentioned in No. 5.280,
    61-61.5 GHz (centre frequency 61.25 GHz),
    122-123 GHz (centre frequency 122.5 GHz), and
    244-246 GHz (centre frequency 245 GHz)

are designated for industrial, scientific and medical (ISM) applications. The use of these frequency bands for ISM applications shall be subject to special authorization by the administration concerned, in agreement with other administrations whose radiocommunication services might be affected. In applying this provision, administrations shall have due regard to the latest relevant ITU R Recommendations.

5.149   In making assignments to stations of other services to which the bands:
13 360-13 410 kHz,
25 550-25 670 kHz,
37.5-38.25 MHz,
73-74.6 MHz in Regions 1 and 3,
150.05-153 MHz in Region 1,
322-328.6 MHz,
406.1-410 MHz,
608-614 MHz in Regions 1 and 3,
1 330-1 400 MHz,
1 610.6-1 613.8 MHz,
1 660-1 670 MHz,
1 718.8-1 722.2 MHz,
2 655-2 690 MHz,
3 260-3 267 MHz,
3 332-3 339 MHz,
3 345.8-3 352.5 MHz,
4 825-4 835 MHz, 4 950-4 990 MHz,
4 990-5 000 MHz,
6 650-6 675.2 MHz,
10.6-10.68 GHz,
14.47-14.5 GHz,
22.01-22.21 GHz,
22.21-22.5 GHz,
22.81-22.86 GHz,
23.07-23.12 GHz,
31.2-31.3 GHz,
31.5-31.8 GHz in Regions 1 and 3,
36.43-36.5 GHz,
42.5-43.5 GHz,
48.94-49.04 GHz,
76-86 GHz,
92-94 GHz,
94.1-100 GHz, 102-109.5 GHz,
111.8-114.25 GHz,
128.33-128.59 GHz,
129.23-129.49 GHz,
130-134 GHz,
136-148.5 GHz,
151.5-158.5 GHz,
168.59-168.93 GHz,
171.11-171.45 GHz,
172.31-172.65 GHz,
173.52-173.85 GHz,
195.75-196.15 GHz,
209-226 GHz,
241-250 GHz,
252-275 GHz
are allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 4.5 and 4.6 and Article 29). (WRC 07)

US342   In making assignments to stations of other services to which the bands:

13 360-13 410 kHz42.77-42.87 GHz*
25 550-25 670 kHz43.07-43.17 GHz*
37.5-38.25 MHz43.37-43.47 GHz*
322-328.6 MHz*48.94-49.04 GHz*
1330-1400 MHz*76-86 GHz
1610.6-1613.8 MHz*92-94 GHz
1660-1660.5 MHz*94.1-100 GHz
1668.4-1670 MHz*102-109.5 GHz
3260-3267 MHz*111.8-114.25 GHz
3332-3339 MHz*128.33-128.59 GHz*
3345.8-3352.5 MHz*129.23-129.49 GHz*
4825-4835 MHz*130-134 GHz
4950-4990 MHz136-148.5 GHz
6650-6675.2 MHz*151.5-158.5 GHz
14.47-14.5 GHz*168.59-168.93 GHz*
22.01-22.21 GHz*171.11-171.45 GHz*
22.21-22.5 GHz172.31-172.65 GHz*
22.81-22.86 GHz*173.52-173.85 GHz*
23.07-23.12 GHz*195.75-196.15 GHz*
31.2-31.3 GHz209-226 GHz
36.43-36.5 GHz*241-250 GHz
42.5-43.5 GHz252-275 GHz

are allocated (*indicates radio astronomy use for spectral line observations), all practicable steps shall be taken to protect the radio astronomy service from harmful interference. Emissions from spaceborne or airborne stations can be particularly serious sources of interference to the radio astronomy service (see ITU Radio Regulations at Nos. 4.5 and 4.6 and Article 29).


SpectrumWiki

 
Industrial, Scientific, and Medical Devices (ISM, FCC Part 18)
WRC-23 Agenda Item 1.14 Possible Adjustments to EESS (passive) Allocations
WRC-27 study for radiolocation use


Related Documents, Links, and Multimedia:
FCC Proceeding (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 241 GHz 244.5 GHz 248 GHz
Wavelength 1.2 mm 1.2 mm 1.2 mm
Band designator(s) EHF (millimeter wave) EHF (millimeter wave) EHF (millimeter wave)
Isotropic collecting area 0.1 mm2 0.1 mm2 0.1 mm2
Free space loss (1 m) 80.1 dB 80.2 dB 80.3 dB
Free space loss (1 km) 140.1 dB 140.2 dB 140.3 dB
Free space loss (10 km) 160.1 dB 160.2 dB 160.3 dB
Free space loss (100 km) 180.1 dB 180.2 dB 180.3 dB
Free space loss (1000 km) 200.1 dB 200.2 dB 200.3 dB
Free space loss
(35,786 km = GEO orbit)
231.2 dB 231.3 dB 231.4 dB
Free space loss (378,370 km = Moon) 251.6 dB 251.8 dB 251.9 dB
Simple HTML Table