Sec.  22.367   Wave polarization.

   

   Link to an amendment published at  70 FR 19309 , Apr. 13, 2005.

   Public mobile station antennas must be of the correct type and
   properly installed such that the electromagnetic emissions have the
   polarization required by this section.

   (a) Vertical. Waves radiated by the following must be vertically
   polarized:

   (1) Base, mobile, dispatch, and auxiliary test transmitters in the
   Paging and Radiotelephone Service;

   (2) Transmitters in the Offshore Radiotelephone Service;

   (3) Transmitters on channels in the 72-76 MHz frequency range;

   (4) [Reserved]

   (5) Control and repeater transmitters on channels in the 900-960 MHz
   frequency range;

   (6) Rural subscriber stations communicating with base transmitters in
   the Paging and Radiotelephone Service pursuant to Sec. 22.563.

   (7) Ground and airborne mobile transmitters in the Air-ground
   Radiotelephone Service.

   (b) Horizontal. Waves radiated by transmitters in the Public Mobile
   Services, other than transmitters required by paragraph (a) of this
   section to radiate a vertically polarized wave must be horizontally
   polarized, except as otherwise provided in paragraphs (c) and (d) of
   this section.

   (c) Circular. If communications efficiency would be improved and/or
   interference reduced, the FCC may authorize transmitters other than
   those listed in paragraphs (a)(1) through (a)(7) of this section to
   radiate a circularly polarized wave.

   (d) Any polarization. Base, mobile and auxiliary test transmitters in
   the Cellular Radiotelephone Service are not limited as to wave
   polarization. Public Mobile Service stations transmitting on channels
   higher than 960 MHz are not limited as to wave polarization.

   [ 59 FR 59507 , Nov. 17, 1994, as amended at  67 FR 77191 , Dec. 17, 2002]