scope:

The present document applies to High Density applications in the Fixed Service (HDFS) in the band 64 GHz to 66 GHz.

Radio frequency propagation in the band 64 GHz to 66 GHz is subject to high levels of oxygen absorption. Because of this, the band is suited to short-range applications and permits a very high re-use factor. Equipment using less complex (lower-order) modulation schemes are feasible in this band still offering suitable link lengths. Typical applications are very wide-band short connections made with simple and robust modulation formats. However no limitation is here made for other applications or for any spectral efficiency and modulation format. (The present document assumes frequency-division duplex or simplex operations only.)

For the purpose of the present document, a planning assumption is made that the system operates within a "Technology-independent assignment" of any size up to 2 GHz (see note); therefore, it includes those system characteristics that, according to the related planning assumptions, may be considered relevant to essential parameters under article 3.2 of the Directive1999/5/EC [1], which states that "[...] radio equipment shall be so constructed that it effectively uses the spectrum allocated to terrestrial/space radio communications and orbital resources so as to avoid harmful interference".

NOTE: Links may be assigned to operate in any bandwidth within the band, or to operate across the entire band. The relevant equipment parameters are referenced in the present document as well as antenna parameters.

A wide range of High Density applications in the Fixed Service (HDFS) is possible. Where appropriate, the corresponding test requirements are cross-referenced to EN 301 126-1 [2] and EN 301 126-3-1 [3].