A tunnel transmitter allows wireless reception in tunnels. It consists of a receiving antenna which receives the signal to be radiated in the tunnel, and...

Similar systems are used also occasionally for TV relay transmitters or as tunnel transmitters. In these cases, a Yagi antenna receives the transmitted...

strips can be used as a radio-frequency identification (RFID) antenna. Tunnel transmitter Through the earth mine communications "Improvements coming soon to...

tunnel is 2,530 m (8,300 ft) long and has tunnel transmitters for uninterrupted car radio and mobile telephone reception. The cost of the new tunnel was...

as long as the BatNodes can see their neighbours. Project Sanguine Tunnel transmitter Leaky feeder Cave-Link [de] Communication with submarines Caving...

the invention by Saleh et al., tunnel transmitters and leaky feeders had been used to provide radio reception in tunnels, mines, subway lines, and other...

could be used to detect these tunnels. This new system uses a combination of sensors and special transmitters to locate tunnels. The IDF expects development...

could be used to detect these tunnels. This new system uses a combination of sensors and special transmitters to locate tunnels. The IDF expects development...

selected because its sandy soil made it difficult for POWs to escape by tunnelling. It is best known for two escape plots by Allied POWs. One was in 1943...

plan by the United States Federal Bureau of Investigation (FBI) to build a tunnel underneath the Soviet Embassy in Washington, D.C., to gather secret intelligence...