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Small rhombic UHF television antenna from 1952. Its broad bandwidth allowed it to cover the 470 to 890 MHz UHF television band.
A rhombic antenna is made of four sections of wire suspended parallel to the ground in a diamond or "rhombus" shape. Each of the four sides is the same length – about a quarter-wavelength to one wavelength per section – converging but not touching at an angle of about 42° at the fed end and at the far end. The length is not critical, typically from one to two wavelengths (λ), but there is an optimum angle for any given length and frequency. A horizontal rhombic antenna radiates horizontally polarized radio waves at a low elevation angle off the pointy ends of the antenna.
If the sections are joined by a resistor at either of the acute (pointy) ends, then the antenna will receive from and transmit to only the direction the end with the resistor points at. Its principal advantages over other types of antenna are its simplicity, high forward gain, wide bandwidth, and the ability to operate over a wide range of frequencies.
A rhombicantenna is made of four sections of wire suspended parallel to the ground in a diamond or "rhombus" shape. Each of the four sides is the same...
diamond) Rhombicantenna, a broadband directional antenna most commonly used on shortwave frequencies polyhedra formed from rhombuses, such as the rhombic dodecahedron...
parallelepiped or a parallelogram that is neither a rhombus nor a rectangle RhombicantennaRhombic Chess Flag of the Department of North Santander of Colombia, containing...
The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. It takes its name from...
common antennas in this band are wire antennas such as wire dipoles or rhombicantennas; in the upper frequencies, multielement dipole antennas such as...
this antenna in 1946. It is very popular in the United States. The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. With...
millimeter wave frequencies. Animation showing a Beverage antenna . Quadrant antenna, similar to rhombic, at an Austrian shortwave broadcast station. Radiates...
distinction arises solely from different desirable radiation patterns of the antennas (near vertical for NVIS, near horizontal for conventional long-range skywave...
28, 1973) was an American radio pioneer best known for creating the rhombicantenna and Bruce array. Bruce was born in Saint Louis, Missouri, and raised...
Moses Jacobson patented a loop antenna with rhombic shape. In 1938, George Brown et al. patented a loop antenna with rhombic shape and quarterwave sides...
transmitters were installed in the main building, using dipole and rhombicantennas in a neighbouring field. The Alexanderson alternator found a second...
The Sloper Antenna is a slanted Dipole antenna. While horizontal dipoles required two large support masts, this antenna type only needs one large mast...
now relayed from London using signals picked up by two Rhombicantennas and a Beverage antenna feeding AR-88 diversity and Mullard ISB type GRF552 receivers...
received directly from WCBS-TV in New York City by means of a large rhombicantenna at the Bald Mountain transmitter, while the station boasted a large...
Lab in Washington DC. An initial prototype antenna array used 40 vertically aligned half rhombicantennas in a 400 foot diameter circle. A second prototype...
antenna field, approximately 1.6 kilometres (0.99 mi) from the main site. It was equipped with large high frequency (HF) directional rhombicantennas...
cables form six diamond-shaped (rhombic) "panels" radiating from the central tower at angles of 60°, so from above the antenna has a snowflake shape. The two...
per volt. Each relay station consisted essentially of back-to-back rhombicantennas on opposite sides of a hilltop, connected via an amplifier. The frequency...
subsequently discharged. In the autumn of 1940, the construction of a large Rhombicantenna system was started, and once in operation, was to orientated to the...
television broadcast industry. "Multiple Unit Steerable Antenna" refers to an array of rhombicantennas used for high frequency (3–30 MHz) trans-Atlantic communication...
also erected four 18 m (59 ft) towers for the 100 m (330 ft) per side rhombicantenna. The crew unloaded 300 t (300 long tons; 330 short tons) of equipment...
of China's first 100-kilowatt broadcast transmitter and its largest rhombicantenna network. He was the first Chinese scientist to research microwave communication...
antennae (in-phase and rhombic), developed the theory of rhombicantennas, invented two advanced systems of rhombicantennas. Also developed the theory...
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