AR 10008384, Operating And Service Manual

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ATH18G27-1
2 Rev A
1.4.1 Connections
Waveguide losses, especially at the lower and higher frequencies, can be minimized by utilizing low-loss
waveguide. The waveguide should be terminated with a WR-42 waveguide connector in order to mate with
the WR-42 waveguide connector provided on the antenna.
1.4.2 Power Amplifier Selection
When used in a shielded room, reflections and room losses will reduce the available microwave (MW) field.
AR RF/Microwave Instrumentation recommends a design safety factor of 100% when selecting a MW power
amplifier. Optimum performance will be achieved when the Model ATH18G27-1 High-Gain Horn Antenna
is used with a broadband MW power amplifier, such as the Model 25T18G26, Model 40T18G26, and other
“T” Series MW Traveling Wave Tube (TWT) amplifiers available from AR RF/Microwave Instrumentation.
1.4.3 General Caution Notes
CAUTION:
The Model ATH18G27-1 is capable of generating output voltages that are
dangerous to human life and can cause serious MW burns to human
tissue. Therefore, never stand or walk in front of the antenna when it is
radiating MW energy.
CAUTION:
The Model ATH18G27-1 and its associated equipment should only be
operated by personnel who are thoroughly familiar with the hazards
inherent to this type of equipment.
CAUTION:
The Model ATH18G27-1 emits highly concentrated MW fields. Users
should therefore take proper precautions when attempting to make any
measurements with this device. Do not stand or walk in front of the
antenna when it is under power and radiating MW energy.
CAUTION:
The recommended waveguide flange torque is 4.5 inch-lbs.