CP480 Wireless Communication and Networks

Determining Meter Directionality

Objectives

1. To determine the effect of meter orientation on measurement of power in wireless systems.

Equipment

• wireless power meter

Procedure

Measuring Meter Antenna Directionality

Before you can determine the directionality of a source, you need to determine the directionality of your detector.

1. At a fixed distance (at least 5m) from a source, set your meter up so that the end of the antenna points toward the source, and you can read the meter without touching it, as above.
2. Record at least 10 consecutive readings on the meter. Try not to move around, so that changes are not due to anything you are doing.
3. Now, while keeping the meter in the same location, rotate it 90 degrees and take another 10 measurements.
4. Now, while keeping the meter in the same location, rotate it 90 degrees from each of the previous orientations and take another 10 measurements.
5. Determine the average, standard deviation, and standard deviation of the mean for each of the 3 sets of readings.
6. From your calculations, determine which way to orient the detector to get maximum signal so that you can do this for all future measurements.

Before you leave the lab, have the lab instructor sign your lab notebook immediately after your last entry.