Com-Power AB-100 Manual - Página 12

Navegue en línea o descargue pdf Manual para Antena Com-Power AB-100. Com-Power AB-100 13 páginas. Biconical, 30 - 300 mhz

Theory of Operation

3.0 Overview

3.1 Theory of Operation

This chapter explains the following:

Overview

Theory of Operation

This section describes the theory of operation of the AB-100 / AB-900

Biconical Antennas.

Broadband antennas allow measurement of signals over a wide frequency

range. These antennas do not require any tuning or balun switching during

measurement. It is very useful for sweep measurement over the frequency

range of operation. Model AB-900 and AB-100 Biconical Antennas are

broadband antennas that operate in the frequency range of 30 MHz to 300

MHz.

Model AB-100 antenna is a receive only antenna. It cannot transmit signals.

However, Model AB-900 antenna can both receive and transmit signals over

the frequency range of operation. Model AB-900 antennas are used for

susceptibility and emissions testing in EMC Laboratories.

Before the Biconical antennas are used for measurement they have to be

calibrated. Typically antenna calibration is performed in an open field test site(

OATS). During calibration a known field strength (dBuV/m) is generated

around the antenna at each frequency (30 -300 MHz). The difference between

field strength (dBuV) received by the antenna and known field strength

generated ( dBuV) is the antenna factor (dB) for that frequency. During EMC

testing the antenna factor for the frequency of interest is added back to reading

on the EMI meter or spectrum analyzer to measure field strength.

dBuV/m (field strength) = dBuV (output measured) + Antenna Factor

3-1

AB-900 Biconical Antenna