The objective of this initiative is the construction of a W-band (80-110 GHz) receiver fitted with 3,000 kinetic inductance detectors (KIDs) to be installed at the second telescope of QUIJOTE at the Teide Observatory. This instrument would allow to cover the only frequency band that can be observed from Earth and isnt currently already covered at this observatory. This would be a perfect complement to the frequency coverage now provided by QUIJOTE MFI2 and TFGI (11, 13, 17, 19, 31 and 43 GHz), by GroundBIRD (150 and 220 GHz) and LSPE-Strip (43 GHz), to be installed in 2025. This would allow consolidating the Teide Observatory as a reference observatory for the study of the cosmic microwave background due to being the only one currently operative from the Northern Hemisphere, thereby being a perfect complement to the current observatories in the Southern Hemisphere.

The main scientific objective behind NGI is to undertake observations of the CMB polarization with the goal to constrain or to measure the B-mode signal imprinted by gravitational waves produced during the inflation of the Universe. This instrument would also allow to address other scientific goals, in particular studies of the Galactic emission in the microwave range and of the Sunyaev-Zeldovich effect produced in galaxy clusters.