Com-power AH-840 User Manual download pdf

A-21

Horn Antenna

Features

Broadband - 18 GHz to 40 GHz

High gain

Individual calibration

Two year warranty

Application

The AH-840 was designed for EMC testing, but

it can also be used for antenna gain pattern

measurements, surveillance, and other applica-

tions. The wide frequency band makes the AH-

840 antenna suitable for sweep measurements,

reducing the need for antenna switching during

the tests.

High gain reduces the input power requirement

to achieve the desired field levels for immunity

testing and improves antenna sensitivity to low

level signals. During emissions testing the mea-

sured field strength can be calculated by adding

the antenna factor for the particular frequency to

voltage measured at the antenna output terminal.

For immunity measurements, the input power

requirement P in Watts to generate E Electric

Field Strength in V/m at a distance D in meters

can be calculated by using the following for-

mula:

P = E

x D

/ 30 x N

N = 10

(G/10)

G = 20 log F -29.79- AF

Where

N = Numeric Gain

G = gain in dBi

F = Frequency in MHz

AF = antenna factor in dB/m

AH-840

Description

Model AH-840 is a broadband linearly polarized

double ridged waveguide horn antenna designed

specifically for Electromagnetic Interference

testing. This antenna can be used for receiving

as well as transmitting applications for the fre-

quency range of 18 GHz to 40 GHz.

This antenna has a high gain; least 20 dBi over

the entire frequency range. This antenna can

accept up to 5 Watts of input power at its termi-

nals in continuous mode for generating electro-

magnetic fields for immunity testing.

The AH-840 Horn antenna has a K type connec-

tor which can mate with SMA type connectors.

The antenna is constructed using lightweight

aluminum with corrosion resistant finish. The

oval rear plate has a 1/4" x 20 threaded hole for

mounting it to Com-Power AT-100 tripod.

The antenna is individually calibrated at 1 meter

and data and certificate of calibration will be

shipped with the antenna. The data will include

the antenna factor and gain of the antenna.

Com-Power Corporation (949) 587 - 9800 www. com-power.com [email protected]

1 2

AH-840 1
Specifications 2

Summary of Contents

Page 1 - AH-840

A-21Horn AntennaFeaturesBroadband - 18 GHz to 40 GHzHigh gainIndividual calibrationTwo year warrantyApplicationThe AH-840 was designed for EMC testing

Page 2 - Specifications

A-22Frequency Range: 18 GHz - 40 GHzPower handling: 5 Watts CWVSWR: 2.0 :1.0Connector type: K type femalePolarization: LinearImpedance: 50 OhmsWeight:

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