Goto Section: 74.535 | 74.537 | Table of Contents
FCC 74.536
Revised as of October 1, 2006
Goto Year:2005 |
2007
Sec. 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 Sta
ndards
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Maximum
Minimum radiation suppression to angle in degrees from
beamwidth
centerline of main beam in decibels
to 3 dB M
inimum -----------------------------------------------------------------
points a
ntenna
Frequency (GHz) Category \1\
gain 5 ° 10 ° 15 ° 20 ° 30 ° 100 ° 140 °
(included
(dbi) to to to to to to to
angle in
10 ° 15 ° 20 ° 30 ° 100 ° 140 ° 180 °
degrees)
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
17.7 to 19.7......................................... A 2.2
38 25 29 33 36 42 55 55
B 2.2
38 20 24 28 32 35 36 36
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
\1\ If a licensee chooses to show compliance using maximum beamwidth to 3 dB po
ints, 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: 2005 |
2007
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