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2. List of tallest structures in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_tallest_structures...

   The tower is home to WIMZ-FM 103.5, whose antenna is at the top. The tower is located 1 mi (1.6 km) east of House Mountain and stands 1,752 ft (534 m) above ground level. When used for television broadcasts by its former owner, Multimedia, Inc. (former licensee of WBIR-TV , Knoxville) it was shielded by mountains from the audience in the ...

3. Polar mount - Wikipedia

   en.wikipedia.org/wiki/Polar_mount

   A polar mount is a movable mount for satellite dishes that allows the dish to be pointed at many geostationary satellites by slewing around one axis. [1] It works by having its slewing axis parallel, or almost parallel, to the Earth's polar axis so that the attached dish can follow, approximately, the geostationary orbit, which lies in the plane of the Earth's equator.

4. List of tallest structures in the United States by height

   en.wikipedia.org/wiki/List_of_tallest_structures...

   Pinnacle Towers Mount Selman: Mount Selman, Texas: Guyed Mast 446.8 m KMSP TV Tower: Shoreview, Minnesota: Guyed Mast 446.7 m Media General Operations Tower Youngstown: Mount Selman, Texas: Guyed Mast 446.5 m KLKN TV-Tower: Utica, Nebraska: Guyed Mast 446 m WCES TV Tower: Wrens, Georgia: Guyed Mast 445.9 m New World Communications Tower ...

5. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.

6. Monopole antenna - Wikipedia

   en.wikipedia.org/wiki/Monopole_antenna

   The antenna is resonant at this length, so its input impedance is purely resistive. The input impedance has capacitive reactance below ⁠ 1 / 4 ⁠ λ and inductive reactance from ⁠ 1 / 4 ⁠ to ⁠ 1 / 2 ⁠ λ. The gains given in this section are only achieved if the antenna is mounted over a perfectly conducting infinite ground plane ...

7. Tribrach (instrument) - Wikipedia

   en.wikipedia.org/wiki/Tribrach_(instrument)

   A tribrach is an attachment plate used to attach a surveying instrument, for example a theodolite, total station, GNSS antenna or target to a tripod. A tribrach allows the survey instrument to be repeatedly placed in the same position over a surveying marker point with sub- millimetre precision , by loosening and re-tightening a lock to adjust ...

8. Altazimuth mount - Wikipedia

   en.wikipedia.org/wiki/Altazimuth_mount

   An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.

9. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   A horn antenna has a flaring metal horn attached to a waveguide. It is a simple antenna with moderate gain of 15 to 25 dBi, used for applications such as radar guns, radiometers, and as feed antennas for parabolic dishes. Slot Consists of a waveguide with one or more slots cut in it to emit the microwaves. Linear slot antennas emit narrow fan ...