47 CFR 74.536 - Directional antenna required.

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There are 5 Updates appearing in the Federal Register for 47 CFR 74. View below or at eCFR (GPOAccess)
§ 74.536 Directional antenna required.
(a) Aural broadcast STL and ICR stations are required to use a directional antenna with the minimum beamwidth necessary, consistent with good engineering practice, to establish the link.
(b) An aural broadcast STL or intercity relay station operating in the 17.7-19.7 GHz band shall employ an antenna that meets the performance standards for Category A, except that in areas not subject to frequency congestion, antennas meeting standards for Category B may be employed. However, the Commission may require the replacement, at the licensee's expense, of any antenna or periscope antenna system of a permanent fixed station that does not meet performance Standard A, which is specified in the table in paragraph (c) of this section, upon a showing that said antenna causes or is likely to cause interference to (or receive interference from) any other authorized or proposed station; provided that an antenna meeting performance Standard A is unlikely to involve such interference.
(c) Licensees shall comply with the antenna standards table shown in this paragraph in the following manner:
(1) With either the maximum beamwidth to 3 dB points requirement or with the minimum antenna gain requirement; and
(2) With the minimum radiation suppression to angle requirement.
Antenna Standards
Frequency (GHz) Category Maximum beamwidth to 3 dB points 1 (included angle in degrees) Minimum antenna gain (dbi) Minimum radiation suppression to angle in degrees from centerline of main beam in decibels
5° to 10° 10° to 15° 15° to 20° 20° to 30° 30° to 100° 100° to 140° 140° to 180°
1 If a licensee chooses to show compliance using maximum beamwidth to 3 dB points, the beamwidth limit shall apply in both the azimuth and the elevation planes.
17.7 to 19.7 AB 2.22.2 3838 2520 2924 3328 3632 4235 5536 5536
[48 FR 50333, Nov. 1, 1983, as amended at 49 FR 7130, Feb. 27, 1984; 50 FR 48599, Nov. 26, 1985; 51 FR 19840, June 3, 1986; 62 FR 4922, Feb. 3, 1997; 68 FR 12767, Mar. 17, 2003]

Title 47 published on 2013-10-01

The following are only the Rules published in the Federal Register after the published date of Title 47.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-07-14; vol. 79 # 134 - Monday, July 14, 2014
    1. 79 FR 40680 - Revisions to Rules Regarding Low Power Auxiliary Stations, Including Wireless Microphones
      GPO FDSys XML | Text
      FEDERAL COMMUNICATIONS COMMISSION
      Final rule.
      Effective: August 13, 2014, except for § 74.832, which contains new or modified information collection requirements that require approval by the Office of Management and Budget (OMB). The Federal Communications Commission will publish a document in the Federal Register announcing such approval and the relevant effective date.
      47 CFR Parts 15, 74, and 90

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United States Code

Title 47 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR 74 after this date.

  • 2014-07-14; vol. 79 # 134 - Monday, July 14, 2014
    1. 79 FR 40680 - Revisions to Rules Regarding Low Power Auxiliary Stations, Including Wireless Microphones
      GPO FDSys XML | Text
      FEDERAL COMMUNICATIONS COMMISSION
      Final rule.
      Effective: August 13, 2014, except for § 74.832, which contains new or modified information collection requirements that require approval by the Office of Management and Budget (OMB). The Federal Communications Commission will publish a document in the Federal Register announcing such approval and the relevant effective date.
      47 CFR Parts 15, 74, and 90