Disclosed is a RF block of a mobile communication base station in which separated modules therein is implemented into one module, in which an antenna diagnosis function is performed by using a modem embedded therein, and in which implementation of a filter is simplified. The environmental noise monitoring system comprises three or more sound level transducers arranged apart from each other in an environment containing one or more noise sources. 01 to 5% by weight of a phosphoric acid ester compound and, where necessary, 0. The currently transmitted frequency is then compared with the received frequency to obtain a difference frequency from which an apparatus may estimate the distance. In order to improve the purification effect in a constructively simple manner, it is suggested to take in medium from the upper portion of the container by a gas lifting effect of the rising gas and to conduct it back into the container. The 3D antenna also includes noise compensation coils at opposite ends of the reading field to minimize electromagnetic radiation from the antenna and also minimize noise from external sources affecting reading of the transponders.