rhombic antenna การใช้

• They also erected four towers for the per side rhombic antenna.
• Thirty-nine rhombic antennas were erected for transmitting.
• However, rhombic antennas are used in cases where the combination of high forward gain ( despite the losses described above ) and large operating bandwidth cannot be achieved by other means.
• Rhombic antennas were installed on the Parade Ground, and the old post exchange / gymnasium building was converted into a top secret listening post code-named " " Station S " ".
• The rhombic antenna, like other horizontal antennas, can radiate at elevation angles close to the horizon or at higher angles depending on its height above ground relative to the operating frequency and its physical construction.
• A "'rhombic antenna "'is a broadband directional wire antenna co-invented by Edmond Bruce and Harald Friis, in 1931, mostly commonly used in the high frequency ( HF ) or shortwave band.
• Bruce received the 1932 IEEE Morris N . Liebmann Memorial Award " for his theoretical investigations and field developments in the domain of directional antennas ", and the Franklin Institute's 1935 Longstreth Award for inventing the rhombic antenna.
• Over twelve working days the crew built the two-story main house with double wooden walls, a main deposit, an emergency house, five metal warehouses for supplies, housing for the dog packs, a power generator and the four towers for the high rhombic antenna.
• In 1924 he joined the Western Electric Company, and in 1925 became a research engineer at Bell Telephone Laboratories, where he helped develop short-wave radio receivers and field strength measuring equipment, and designed directional antennas for short-wave radio communication, including his celebrated rhombic antenna ( 1931 ).