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Com-Power AHA-118 700...
Frequency Range 700 MHz to 18 GHz...

Com-Power AHA-118 Active Horn Antenna 700 MHz - 18 GHz

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Com-Power AHA-118 700 MHz - 18 GHz Active Horn Antenna

Condition Used

Frequency Range 700 MHz to 18 GHz
Enhanced Sensitivity
Built in 40 dB Preamp
Individual Calibration

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1 Unit

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Data Sheet

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Specifications

Frequency Range	1 GHz to 18 GHz (useable from 700 MHz)
Gain	Preamplifier Gain: 40 dB (±2.5 dB) Active Isotropic Gain: 43.2 to 53.6 (average: 48.6) dBi
Antennas Double Ridge Guide Horn Antenna
Parameter	Value
Antenna Factor (1 Meter)	-13.1 to 11.3 (average: -0.4) [dB(m-1)]
Maximum Continuous Power	300 Watts
Impedance	50 Ohms
Connector	Precision N-type (female)
Dimensions	5.6” x 9.5” x 10.2”[14.2 x 24.1 x 25.9 cm]
VSWR	1.58 to 3.32 (average: 2.23) :1
Weight	4 lbs. [1.8 kg]

Test Equipment Description

The AHA-118 is a broadband, linearly polarized Double Ridge Horn Antenna with built-in, 40 dB gain, low noise preamplifier. This active antenna operates over the frequency range of 700 MHz to 18 GHz, with excellent efficiency from 1 GHz to 18 GHz.

This measurement system arrangement, with preamplifier directly behind the antenna, rather than next to (or embedded into) the remotely located test receiver, increases measurement sensitivity, as well as accuracy, by amplifying the received signals prior to being significantly attenuated by the long cable run between the test site and test equipment area.

Construction

The AHA-118 is designed to be extremely durable, making it an ideal choice for daily use in laboratory environments. The antenna is constructed using a heavy gauge, high grade aluminum with a corrosion resistant coating. It is fitted with high quality, precision N-type coaxial connectors at the antenna terminals, as well as the preamplifier input/output terminals.

Com-Power AHA-118 Preamplifier

Calibration
Each antenna is individually calibrated per ANSI C63.5 or SAE ARP958 with NIST traceability. The calibration data and certificate is provided. Recognized ISO 17025 accredited calibration is also available upon request.

Application

The AHA-118 Active Double Ridge Horn Antenna is suitable for use in the following capacities:

as an EMI test antenna for qualification-level regulatory compliance measurements (FCC, CE, MIL-STD-461, RTCA DO-160, FDA, SAE (automotive), etc.)
as a transmitting antenna (preamp bypassed) for establishing radiated RF fields for product immunity tests, with up to 300 Watts input power
as a “substitution antenna” (preamp bypassed) for determining the Effective Radiated Power (ERP) and/or Effective Isotropic Radiated Power (EIRP) of intentional radiators
test site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys, and other general purposes

Flexibilty

The AHA-118 can easily be configured by the operator on the fly, as necessary, to meet the specific requirements for the task at hand. Where system sensitivity (large signal to noise ratio) is not the primary concern; attenuation, notch or bandpass filters can be inserted between the antenna and preamplifier, in order to facilitate measurements in the presence of high-amplitude signals. Or, the preamplifier can be bypassed altogether, in which case the antenna can be used for receiving or transmitting purposes.

Mounting

The AHA-118 can easily be secured to any tripod or mast via its standard 1/4-inch x 20 mounting hole located on the back of the antenna. For installations without a horizontal mounting bolt arrangement, a right-angle mounting bracket is supplied, which mounts to the rear of the horn so that the orientation of the 1/4-inch x 20 mounting hole is vertical.

Typical Data

Active Antenna Factors / Isotropic Gain	Antenna Factors / Isotropic Gain (preamp bypassed)
Preamplifier Gain	VSWR / Return Loss (antenna input)
Typical Field Strength with 300W Input Power	-3 dB (Half-Power Beamwidth