antenna-theory.com

[Groinx]

Hi,
from this article I concluded that active measurements are used for measure TRP and TIS, but passive measurements are measure of what???

http://www.microwavevision.com/sites/www.microwavevision.com/files/files/efficient_testing_wireless_devices_lr.pdf

[Schubert]

You use passive measurements to get the antenna's radiation pattern, efficiency, polarization and gain.

Passive measurements are simpler, cheaper and quicker than TIS and TRP. They only require a VNA and all frequencies can be done in a single measurement. TIS and TRP require a call box (for cellular) or wifi analyzer, and each frequency has to be measured individually.

See:
Antenna Measurements: http://www.antenna-theory.com/measurements/radpattern.php

TRP: http://www.antenna-theory.com/definitions/trp.php
TIS: http://www.antenna-theory.com/definitions/tis.php
Radiation Pattern: http://www.antenna-theory.com/basics/radPattern.html

[Groinx]

What is EIS in this formula what it presents, is there some formula for EIS?