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Active Horn Antenna

Features

Application

This antenna is suitable for accurately receiving low

amplitude radiated emission signals. It is used during

EMC testing for various standards such as FCC part

15, CISPR, and FAA for EMC emissions.

For obtaining valid data during the test, it is impera-

tive to maintain signal level above the noise oor.

In a typical setup, a receiving antenna is connected

to a preamplier that is located next the spectrum

analyzer. The output of the preamplier is then fed to

the spectrum analyzer. In this arrangement, since the

location of the preamplier is far from the antenna,

the interconnecting cable is long. A combination of

factors such as a long cable, increasing cable loss

(especially for frequencies above 1 GHz), and high

antenna factors reduce the signal level to below the

noise oor of the preamplier; and that produces

invalid readings. Boosting the signal at the antenna,

prior to its attenuation by long cables keeps it from

falling below the noise oor.

Each antenna is individually calibrated. The correction

factors and certicate of calibration is shipped with

the antenna. The data also includes separate antenna

factors and amplier gain.

AHA-118

Description

The model AHA-118 Active Horn Antenna is basically

the AH-118 Horn Antenna with an integrated preampli-

er. The preamplier has a nominal gain of 20 dB for

the entire frequency range. The preamplier improves

the effective system noise performance for emissions

testing as explained below. The antenna AH-118 is lin-

early polarized and has a frequency range of 1-18 GHz.

The output of the antenna is connected to the preampli-

er by a short low loss cable, which can be removed.

This arrangement makes it possible to (1) insert a lter

before the amplier and (2) use the antenna alone for

transmission. The lter insertion capability is impor-

tant and is required in presence of a high-level signal

(such as fundamental frequency), which possibly could

saturate the amplier if the lter is not used. The trans-

mitted signal ow is in opposite direction and uses a

higher power level. Both conditions could damage the

preamplier if not removed.

This antenna is constructed using lightweight aluminum

with a corrosion resistant conductive coating. The

rear mounting plate of the AHA-118 has 1/4 inch x 20

threads. These threads allow the antenna to be mounted

on a model AT-100 antenna tripod or any tripod with

similar mounting arrangement. The antenna is powered

by an supplied external DC wall mount adapter.

Com-Power Corporation (714) 528-8800 www. com-power.com sales@com-power.com

Frequency Range – 1 to 18 GHz

Increased Sensitivity with a Built in Preamp

Two-year Warranty

Individual Calibration

1 2

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Página 1 - Description

Active Horn AntennaFeaturesApplicationThis antenna is suitable for accurately receiving low amplitude radiated emission signals. It is used during EMC

Página 2 - Specications

Frequency Range: 1 GHz - 18 GHzBulit-in preamp gain: 25 dB ± 2Output VSWR: 2.5 :1 Polarization: Linear Output Impedance: 50 ΩConn

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Com-power AHA-118 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Acessórios de comunicações Com-power AHA-118. Com-Power AHA-118 User Manual Manual do Utilizador

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