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  2. Antenna analyzer - Wikipedia

    en.wikipedia.org/wiki/Antenna_analyzer

    An antenna analyzer measuring SWR and complex impedance of a dummy load. MFJ-269, MFJ Enterprises Inc. An antenna analyzer or in British aerial analyser (also known as a noise bridge, RX bridge, SWR analyzer, or RF analyzer) is a device used for measuring the input impedance of antenna systems in radio electronics applications.

  3. 15-meter band - Wikipedia

    en.wikipedia.org/wiki/15-meter_band

    The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz. The band is suitable for amateur long-distance communications, and such use is permitted in nearly all countries.

  4. List of radio stations in Israel - Wikipedia

    en.wikipedia.org/wiki/List_of_radio_stations_in...

    Radio Lelo Hafsaka Hebrew: 103.6 FM: Radio Kol Ramat HaSharon Hebrew: 103.6 FM: Radio Kol HaShfela Adult hits / EDM: Hebrew: 106.2 FM: IDC Radio Hebrew: 106.2 FM: Radio Kol Rishonim Hebrew: 106.5 FM. 94.0 FM / 89.3 FM. Galei Yisrael News / Music / National Religious: Hebrew

  5. Antenna measurement - Wikipedia

    en.wikipedia.org/wiki/Antenna_measurement

    Antenna directivity is the ratio of maximum radiation intensity (power per unit surface) radiated by the antenna in the maximum direction divided by the intensity radiated by a hypothetical isotropic antenna radiating the same total power as that antenna. For example, a hypothetical antenna which had a radiated pattern of a hemisphere (1/2 ...

  6. Adcock antenna - Wikipedia

    en.wikipedia.org/wiki/Adcock_antenna

    The Adcock antenna is an antenna array consisting of four equidistant vertical elements which can be used to transmit or receive directional radio waves. The Adcock array was invented and patented by British engineer Frank Adcock and since his August 1919 British Patent No. 130,490, the 'Adcock Aerial' has been used for a variety of ...

  7. Arutz Sheva - Wikipedia

    en.wikipedia.org/wiki/Arutz_Sheva

    Arutz Sheva (Hebrew: ערוץ 7, lit. 'Channel 7'), also known in English as Israel National News, is an Israeli media network identifying with religious Zionism. It offers online news articles in Hebrew, English, and Russian as well as live streaming radio, video and free podcasts. [1]

  8. Network analyzer (electrical) - Wikipedia

    en.wikipedia.org/wiki/Network_analyzer_(electrical)

    ZVA40 vector network analyzer from Rohde & Schwarz.. A network analyzer is an instrument that measures the network parameters of electrical networks.Today, network analyzers commonly measure s–parameters because reflection and transmission of electrical networks are easy to measure at high frequencies, but there are other network parameter sets such as y-parameters, z-parameters, and h ...

  9. Amateur radio propagation beacon - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_propagation...

    An amateur radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on LF, MF, HF, VHF, UHF, and microwave frequencies. Microwave beacons are also used as signal sources to test and calibrate antennas and ...