AR 10008384, Руководство по эксплуатации и обслуживанию

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Rev A 1
1. GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The AR Model ATH18G27-1 High-Gain Horn Antenna 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 of18–26.5 GHz. The Model ATH18G27-1 has a power-handling capability of 360 watts (W) with a
minimum gain of 8.8dB at 18 GHz, increasing linearly to more than 12dB at 26.5 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 Voltage Standing-Wave Ratio (VSWR), for the Model ATH18G27-1.
1.3 PERFORMANCE DATA
Typical Gain versus Frequency and Calculated Field Strength (1m and 3m) versus Frequency data for the
Model ATH18G27-1 are included in Section 2 of this manual. Typical Beam Width (E-Plane and H-Plane)
data for the Model ATH18G27-1 is presented in Table 1-1.
Table 1-1. Model ATH18G27-1 Typical Beam Width (E-Plane and H-Plane)
Frequency (GHz) H-Plane -3dB Beam Width
(degrees)
E-Plane -3dB Beam
Width (degrees)
Gain (dBi)
18.00 69 69 8.8
18.85 66 65 9.2
19.70 63 62 9.6
20.55 60 59 9.8
21.40 57 57 10.2
22.25 55 54 10.5
23.10 53 52 10.8
23.95 51 50 11.1
24.80 50 48 11.5
25.65 48 46 11.7
26.50 47 45 12.0
1.4 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.