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  2. Antenna amplifier - Wikipedia

    en.wikipedia.org/wiki/Antenna_amplifier

    In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable. An antenna amplifier boosts a radio signal considerably for devices that receive radio ...

  3. AN/ARC-190 - Wikipedia

    en.wikipedia.org/wiki/AN/ARC-190

    The ARC-190 is a military HF radio that operates between 2-30 MHz and transmits at 300+ watts.It features a dual heterodyne receiver/transmitter that uses IF frequencies of 97.8 and 1.8 MHz, an antenna coupler that is pressurized to 7±1 PSI with dry nitrogen (air) which (1) prevents high voltage arcing, (2) prevents corrosion, (3) provides a uniform cooling medium, and one of various controls ...

  4. Andrew Corporation - Wikipedia

    en.wikipedia.org/wiki/Andrew_Corporation

    Andrew Corporation products included antennas, cables, amplifiers, repeaters, transceivers, as well as software and training for the broadband and cellular industries. [3] The corporation supported customers in 35 countries across Asia-Pacific, Europe, and the Americas, with manufacturing plants in 12 countries, at one time employing over 4,500 ...

  5. Tower Mounted Amplifier - Wikipedia

    en.wikipedia.org/wiki/Tower_Mounted_Amplifier

    There are occasions when the cable between the antenna and the receiver is so lossy (too thin or too long) that the signal weakens from the antenna before reaching the receiver; therefore it may be decided to install TMAs from the start to make the system viable. In other words, the TMA can only partially correct, or palliate, the link imbalance.

  6. Low-noise block downconverter - Wikipedia

    en.wikipedia.org/wiki/Low-noise_block_downconverter

    Other very popular example for different spacing is: Astra 1: 19.2°E, Astra 3: 23.5°E and Astra 2: 28.2°E (4.3°+4.7°=9°spacing). And there are also available four feed monoblock LNB units, which enable users to receive signals from four satellites, for example Eurobird 9°E , Hotbird 13°E , Astra 19.2°E and Astra 23.5°E (4°+6.2°+4.3 ...

  7. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    where SNR 1 and SNR 2 are the video (base-band) signal-to-noise values for the channels for Antenna 1 and Antenna 2, when square-law detection is used. In the case of 3-channel processing, an expression which is applicable when the S:N ratios in all three channels exceeds unity (when ln(1 + 1/SNR) ≈ 1/SNR is true in all three channels), is

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