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2. Corner reflector antenna - Wikipedia

   en.wikipedia.org/wiki/Corner_reflector_antenna

   Corner reflector UHF TV antenna from 1954 with bowtie dipole driven element. A corner reflector antenna is a type of directional antenna used at VHF and UHF frequencies. [1] [2] It was invented by John D. Kraus in 1938. [3] [4] It consists of a dipole driven element mounted in front of two flat rectangular reflecting screens joined at an angle ...

3. Discone antenna - Wikipedia

   en.wikipedia.org/wiki/Discone_antenna

   On February 6, 1945, Armig G. Kandoian of New York City was awarded U.S. patent number US 2368663 "Broad band antenna" (assignor to Federal Telephone and Radio Corporation, later merged with ITT Corporation), from an application made on May 15, 1943.

4. Dipole antenna - Wikipedia

   en.wikipedia.org/wiki/Dipole_antenna

   German physicist Heinrich Hertz first demonstrated the existence of radio waves in 1887 using what we now know as a dipole antenna (with capacitative end-loading). On the other hand, Guglielmo Marconi empirically found that he could just ground the transmitter (or one side of a transmission line, if used) dispensing with one half of the antenna, thus realizing the vertical or monopole antenna.

5. KVLY-TV mast - Wikipedia

   en.wikipedia.org/wiki/KVLY-TV_mast

   The KVLY-TV mast (formerly the KTHI-TV mast) is a television-transmitting mast in Blanchard, North Dakota. It is used by Fargo station KVLY-TV (channel 11) and KXJB-LD 's Argusville / Valley City / Mayville translator K28MA-D (channel 28), along with KNGF (channel 27).

6. Gain (antenna) - Wikipedia

   en.wikipedia.org/wiki/Gain_(antenna)

   For a given frequency, the antenna's effective area is proportional to the gain. An antenna's effective length is proportional to the square root of the antenna's gain for a particular frequency and radiation resistance. Due to reciprocity, the gain of any antenna when receiving is equal to its gain when transmitting.

7. Near vertical incidence skywave - Wikipedia

   en.wikipedia.org/wiki/Near_Vertical_Incidence...

   The overall efficiency of the antenna can be increased by placing a ground wire, slightly longer than the antenna, parallel to and directly underneath the antenna. A single ground wire can provide antenna gain in the 3–6 dB range. This is a reflector element used to form a 2-element Yagi beam antenna.