EMC Antenna - Horn Antenna Calibration Methods

14/12/2021 Posted by: ft-rf.com.tw

How to test EMC Antenna - Dual Polarized Horn Antennas ( Quad ridged horn antenna & Open boundary quad ridged horn antenna?

The Dual Polarized Horn Antenna includes HQ model - Quad-ridged Horn AntennaOpen Boundary Quad-Ridged Horn Antenna -HR Model. These Horn antennas have an electronic switch that may simultaneously test horizontal and vertical or +-45deg polarization, as well as a couple that can test circular polarization.
The dual-polarized antennas are mounted on a special table or wall.

FT-RF also supply the calibration service for these antennas in case the customer wants to use them for a certain purpose.

How to test EMC Antenna - Single-polarized Horn Antennas (Double ridged horn antenna & Open boundary double ridged horn antenna)?

HA Model - Double-Ridged Horn Antenna & HB model - Open Boundary Double-Ridged Horn Antenna are commonly used to replace the antenna method's calibration antenna. When HA calibration is utilized, the calibration site is lost (patch loss uses a network analyzer)

Enter the antenna's gain (minus the gain of the antenna, equal to the address of the object under test, return to zero)

There is only one technique to compute antenna gain. The path loss patch loss subtracts the antenna's gain and substitutes the antenna under test to obtain the antenna's gain.
Rotate the object under test after calculating the antenna route loss and gain calibration numbers (requires a rotating table, 2D test)
If you want to read the horizontal and vertical antenna patterns at the same time with a dual-polarized antenna, an RF electronic switch, and a 3D rotating table, you can get the antenna pattern of the antenna (3D testing requires the use of HA-Series calibration twice, Horizontal and vertical or +-45deg),

Horn Antennas can be tested in a variety of methods (if you have any requirements,  Please provide simple photos or hand-drawing photos, after evaluating, we will submit a testing plan)

To ensure that the test value of the antenna is in compliance with international standards, all Horn products developed by FT-RF have passed internal calibration and testing in collaboration with external national research institutions, as well as third-party confirmation tests.
In most ISO systems, we will demand external calibration of our test items every three years and internal self-calibration every other year. You can use the network with a set of HA-Series antennas. 
Calculate the path's loss using an analyzer (but usually at least three antennas can be used for internal correction, we can do internal correction by replacing the three antennas in turn)

The antenna can be sent back to Taiwan for calibration once every three years ( shipping fee will be paid by the customer), or the customer also can purchase a new set of calibrated antennas (calibrated the antenna internally).

Antenna calibration is mostly done by an external calibration unit that must bear the ISO17025 and TAF logos.

For the difference comparison test, you can use internally calibrated antennas, self-calibration, and ISO17025 antennas; this approach is frequently used in the ISO9001 series.

Comments (1)

"Thank for sharing"

Jon 22/06/2022