microwave transmitter
41Communication with submarines — is difficult because radio waves do not travel well through thick electrical conductors like salt water. The obvious solution is to surface and raise an antenna above the water, then use ordinary radio transmissions. Early submarines had to… …
42Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
43satellite communication — Introduction in telecommunication, the use of artificial satellites to provide communications links between various points on Earth (Earth satellite). Communications satellites relay voice, video, and data signals between widely separated fixed… …
44XERF-AM — The call letters XERF AM are assigned to a licensed border blaster radio station that was located in Villa Acuña, Coahuila, (later renamed Ciudad Acuña) and that was operated under the laws of Mexico by Ramón D. Bósquez. Once world famous, XERF… …
45List of television stations in the San Francisco Bay Area — Network stations= The major network television affiliates include *KGO TV 7 (ABC) *KPIX 5 (CBS) *KTVU 2 (based in Oakland) (FOX) *KNTV 11 (based in San Jose) (NBC) *KBCW 12/44 (CW) *KQED 9 (PBS) *KCSM 43 (based in San Mateo) (PBS) *KRON 4… …
46Distributed transmission system — This article is about terrestrial broadcasting. For electrical power distribution, see distributed generation. In North American digital terrestrial television broadcasting, a distributed transmission system (DTS or DTx) is a form of single… …
47Solar power satellite — A solar power satellite, or SPS or Powersat, as originally proposed would be a satellite built in high Earth orbit that uses microwave power transmission to beam solar power to a very large antenna on Earth. Advantages of placing the solar… …
48WWOR-TV — This article is about the local New York City market television station. For the cable Superstation feed available nationwide from 1990 1996, see WWOR EMI Service. WWOR TV Secaucus, New Jersey New York, New York Branding My 9 …
49WDIV-TV — Detroit, Michigan City of license Detroit, Michigan Branding Local 4 (general) Local 4 News (newscasts) Slogan …
50Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
