35GHz

35 GHz is a frequency in the microwave portion of the electromagnetic spectrum. With a wavelength of about 8.6 millimeters in free space, it lies within the Ka-band, commonly defined as approximately 26.5 to 40 GHz. The Ka-band is notable for offering wide bandwidths and the potential for compact, high-gain antennas, making it attractive for high-capacity wireless links and radar applications.

In telecommunications, 35 GHz is used for high-data-rate point-to-point microwave links, fixed wireless access, and satellite uplinks or downlinks within Ka-band allocations. It is also employed in some radar and imaging systems, where short wavelengths enable finer spatial resolution. In research and industry, 35 GHz is used for millimeter-wave testing, materials characterization, and sensor development. Modern 5G and other mmWave trials frequently explore portions of the Ka-band near 35 GHz to balance bandwidth availability with practical hardware size.

Propagation at 35 GHz is predominantly line-of-sight, with performance sensitive to atmospheric conditions. Dry air causes relatively modest attenuation, while rain and heavy precipitation can produce noticeable signal loss, a factor in link budgeting. Atmospheric absorption and path losses increase compared with lower microwave bands, requiring high-gain antennas and precise alignment for reliable links.

Operating at this frequency involves specialized hardware, including high-frequency transceivers, filters, amplifiers, and waveguides, plus directional antennas such as horns or compact parabolic dishes. Regulatory allocations and licensing vary by country, and emissions are subject to spectrum- and safety-related standards.

See also: Ka-band, millimeter-wave, fixed wireless, satellite communications.