AR 10049920, Руководство по эксплуатации и обслуживанию

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Rev A 1
1. GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The AR RF/Microwave Instrumentation Model ATH26G40A-1 Low-Gain Horn Antenna (wide beam width)
is a complete, self-contained unit that is well-suited for either shielded room or free-space radiated emissions
or radiated susceptibility testing over a frequency range of 26.5–40 GHz. The Model ATH26G40A-1 has a
power-handling capability of 240 watts (W) with a minimum gain of 9dB at 26.5 GHz, increasing linearly to
12.1dB at 40 GHz.
This versatile antenna works equally well as a radiator for Radio Frequency (RF) susceptibility testing or as a
receiving antenna for RF emissions testing.
1.2 SPECIFICATIONS
Refer to the AR RF/Microwave Instrumentation Data Sheet at the end of this section for detailed
specifications, including Gain, Beamwidth, E-Field levels and Voltage Standing-Wave Ratio (VSWR) for the
Model ATH26G40A-1.
1.3 INSTALLATION
Before installing the antenna, thoroughly inspect the unit for signs of any physical damage that may have
occurred during shipment. Read the following operating instructions in their entirety, and pay particular
attention to all caution notes.
1.3.1 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-28 waveguide connector in order to mate with
the WR-28 waveguide connector provided on the antenna.
1.3.2 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 ATH26G40A-1 High-Gain Horn Antenna
is used with a broadband MW power amplifier, such as the Model 25T26G40, Model 40T26G40, and other
“T” Series MW Traveling Wave Tube (TWT) amplifiers available from AR RF/Microwave Instrumentation.