Goto Section: 74.535 | 74.537 | Table of Contents
FCC 74.536
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 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
5DEG to 10DEG 10DEG to 15DEG 15DEG to 20DEG 20DEG to 30DEG 30DEG to
100DEG 100DEG to 140DEG 140DEG to 180DEG
17.7 to 19.7 A
B 2.2
2.2 38
38 25
20 29
24 33
28 36
32 42
35 55
36 55
36
^1If 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.
[ 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]
Goto Section: 74.535 | 74.537
Goto Year: 2010 |
2012
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