MIL-PRF-55359A(CR)
horizontally polarized signals. The measurement shall be made with the antenna mounted on the
ground plane of Figure 3.
3.7.4 Radiation pattern (see 4.5.3). The radiation field pattern shall be essentially
omnidirectional in the azimuth plane and shall approximate a Cos θ curve in the vertical plane.
3.7.5 Gain (see 4.5.4). Antenna gain relative to an isotropic source shall not be less than
-2 dB.
3.8 Operational inspection. Each unit(s) shall be capable of meeting the specified test
after applicable processes inspection and test have been completed to determine that each unit(s)
on order is operable prior to packaging (see 4.9).
3.9 Interchangeability (see 4.8). Like units, and replaceable parts shall be physically and
functionally interchangeable, without modification of such items or of the equipment.
Components of the antenna shall not be designed as matched units. Antenna half loops shall be
completely interchangeable and shall perform as indicated in 3.8 and interface with all cable
assemblies in DL-SM-A-498900.
3.10 Environmental conditions (see 4.6). The unit(s) shall meet the following
environmental conditions.
3.10.1 Temperature-altitude (see 4.6.1). Antenna performance shall be as indicated for
ambient temperatures from -54°C to +95°C at altitudes from sea level to 70,000 feet. The
antenna shall withstand extended exposure to temperatures within the -62°C to +71°C range.
3.10.2 Humidity (see 4.6.2). The antenna shall withstand relative humidity conditions in
excess of 95% and shall be capable of satisfactory performance, within 1/2 hour after subjection
to the test.
3.10.3 Vibration (see 4.6.3). The antenna shall perform satisfactorily after subjection to
vibration environments in accordance with the test of 4.6.3.
3.10.4 Shock (see 4.6.4). The antenna shall perform satisfactorily after subjection to a
shock environment in accordance with the shock test of 4.6.4.
3.10.5 Acceleration (see 4.6.5). The unit(s) shall withstand 6g steady state acceleration
for one minute.
3.10.6 Rain (see 4.6.6). The unit(s) shall meet the performance requirements of this
document when subjected to rain as encountered in service, with the base down, in accordance
with the rain test (see 4.6.6).
3.10.7 Salt fog (see 4.6.7). The unit(s) shall be exposed, in normal operation
configuration, to salt fog for 48 hours and shall show no evidence of corrosion as evidenced by
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