Passive Inter Modulation (PIM) Testing
PIM is defined as a non-linear combination of two or more than two frequencies in a passive circuit. The mixing of the frequencies which usually occurs in the transmit path, usually produces the unwanted signals in the medium.
The distortion advances and gets to a place where is no more desirable once it occurs at the frequency that is within the receive band and at a level that is higher level enough to interfere with the wanted signal.
PIM is now a growing issue for the cellular handset network operators. The PIM become more than an concern when the overlaying new carriers into old antenna runs. PIM can come up with the interface to reduce a cell’s receiving sensitivity or even it can block call. This interference is drastic enough to affect the cell that creates it and also the surrounding cells that are receivers.
So for PIM is a very serious issue for all the handset operators who might need to maximize their network reliability, data rate, capacity etc. In addition to this high digital data communication makes the PIM testing more and more critical, this happens in the era when the need for the use of cells is growing very fast.
The latest upcoming 4th generation network constitutes the increased mobile data rates of up to 100 Mb/s and an extremely high transmission rate which will even worsen the situation by making PIM vulnerable in the today’s network like it has never occurred before.
In this generation therefore good network PIM performance and testing are now vital.