MIL-DTL-49295C
3.4.2.6 Radiation pattern. The radiation pattern shall be in accordance with 2.7.2 of TIA-329 (see 4.5.3, table III).
3.4.2.7 RF power level. Continuous duty RF power capability of the complete antenna system shall be 350 watts
(see 4.5.1.2).
3.4.2.8 Front to back ratio. The front to back ratio shall not be less than 12 dB (see 4.5.3, table III).
3.4.2.9 Dielectric withstanding voltage. Insulation material in the matching transformers and mast insulator shall
show no visible effects or evidence of dielectric breakdown due to an applied voltage of 10,000 volts after the system
has been subjected to environmental stresses of the service conditions specified in 4.5.1.4 (see 4.10).
3.5 Service conditions. As a result of being subjected to the following environmental conditions, according to the
methods set forth in the test schedules, the antenna system shall not exhibit any effect that would be harmful to
performance or reliability. The parts of the system shall not be deformed, defaced, or frayed in any manner or exhibit
evidence of corrosion. Corrosion is any visible degradation that can be attributed to flaky, pitted, blistered or
otherwise loosened finish on metal surface. Harmful electrical performance is performance below the test limits
stated herein (see 4.10).
3.5.1 Temperature.
a. High temperature (see 4.10.1.1, table IV).
(1) Operating. The antenna system shall be operable without degradation in specified performance
and shall sustain no physical deterioration, at ambient air temperature as high as +71°C (+160º F).
2
This includes effects of solar radiation at a rate of 360 BTU/ft /hr.
(2) Storage and transportation. The antenna system shall withstand exposure to ambient
temperatures as high as +71°C (+160°F).
b. Low temperature (see 4.10.1.2, table IV).
(1) Operating. The antenna system shall be operable without degradation in specified performance
and shall sustain no physical deterioration at ambient air temperatures as low as -45.6°C (-50°F).
(2) Storage and transportation. The antenna system shall withstand exposure to ambient
temperature as low as -57°C (-70°F).
3.5.2 Rain. The antenna system shall be capable of operating for extended periods in heavy rainfall without
harmful structural deterioration, without degradation in specified performance, without insulation breakdown, and
without electrical flashover (see 4.10.5, table IV).
3.5.3 Humidity. The antenna system shall be operable without degradation in specified performance and shall
sustain no harmful physical deterioration, during and after prolonged exposure to extreme high humidity levels
encountered in tropical areas. The antenna system shall be capable of meeting the test of method 507.5,
3.5.4 Fungus. The antenna system shall show no evidence of viable fungus or corrosion when subjected to
environmental conditions which would be favorable to their development, namely high humidity, warm atmosphere,
and presence of inorganic salts. The antenna system shall be capable of meeting the test of method 508.6 of MIL-
3.5.5 Salt fog. The antenna system shall be capable of operation for extended period in the saline atmosphere of
a seacoast environment without harmful structural deterioration, without degradation in specified performance,
without insulation breakdown and without electrical flashover. The antenna system shall be capable of meeting the
4
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business