Abstract: A cargo management system for tracking a pallet and containers carried on the pallet. An asset tracking management software application is provided with status information regarding the pallet and the containers. A pallet communications device sends pallet status signals, including pallet location, to the software application. Certain ones of the containers, via a container communications device, send container status signals, including container location, directly to the software application. Certain other ones of the containers can communicate only with the pallet communications device via a Bluetooth link. These containers are interrogated to ascertain whether they are on the pallet based on whether a reply signal is received and based thereon the container location can be determined. An owner of the containers can access the software application to determine pallet and container locations and thus determine whether a pallet or container has been diverted from its intended destination.

Abstract: A radio frequency transmitting and receiving apparatus comprising a filter and an antenna, wherein the input reactance of the antenna is substantially equal in magnitude and opposite in sign to the output reactance of the filter. This reactance relationship permits the antenna and filter to be collocated and avoids transformation of the input and output impedances to the conventional 50 ohms such that the filter and antenna can be connected with a conventional 50 ohm transmission line.