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Air-Sampling for Automatic Detection of Performance Degradation and RF Intermodulation Products in a UMTS Base Station Installation.

IP.com Disclosure Number: IPCOM000004824D
Original Publication Date: 2001-Jun-19
Included in the Prior Art Database: 2001-Jun-19

Publishing Venue

Motorola

Related People

Authors:
Neil Turner Chris Brice

Abstract

This paper shows how an automatic system can be incorporated into a cellular base station to detect degradation of the antenna cabling with time. This can be measured in terms of the IP3 of the cabling by detecting the presence and magnitude of rf third-order products using the loopback system. Power loss due to degradation and water ingress can also be measured. A key element in this system is air-sampling of the actual transmitted signal and any associated spectral impurities.