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  2. Rhombic antenna - Wikipedia

    en.wikipedia.org/wiki/Rhombic_antenna

    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 ...

  3. File:Rhombic antenna diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Rhombic_antenna...

    The antenna consists of a wire suspended above the ground in the shape of a rhombus, terminated at one end by a resistor equal the the wire's characteristic impedance, about 400 to 600 ohms, and at the other end connected to the feedline to the receiver. The rhombic is a travelling wave antenna, Each segment of the rhombus has a radiation ...

  4. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    A competing third criterion is the number and bandwidth of the frequenc(y/ies) that a single antenna intercepts or emits. A fourth design goal is to make the antenna directional: To project or intercept radio waves from only one vertical and / or horizontal direction as exclusively as possible. Simple antennas

  5. Television antenna - Wikipedia

    en.wikipedia.org/wiki/Television_antenna

    The antenna can have a smaller or larger number of rod elements; in general, the more elements, the higher the gain and the more directional. Another design used mainly for UHF reception is the reflective array antenna, consisting of a vertical metal screen with multiple dipole elements mounted in front of it.

  6. Radiation pattern - Wikipedia

    en.wikipedia.org/wiki/Radiation_pattern

    The radiation patterns of a vertical half-wave dipole, an omnidirectional antenna. The horizontal and vertical polar patterns are projections of the 3 dimensional pattern onto horizontal and vertical planes, respectively. An omnidirectional antenna radiates equal signal strength in all horizontal directions, so its horizontal pattern is just a ...

  7. Numerical Electromagnetics Code - Wikipedia

    en.wikipedia.org/wiki/Numerical_Electromagnetics...

    L.B. Cebik's Basic & Intermediate Antenna Modeling - Includes exercise models for EZnec (also see Cebik's Antenna Modeling Notes - 7 Volumes including the models). Simulating the end-fed half-wave (EFHW) dipole antenna; VK3IL - Multiband end-fed 80-10m antenna - NEC2 model file of a "MyAntennas EFHW-8010" multi-band antenna.

  8. Vertical and horizontal (radio propagation) - Wikipedia

    en.wikipedia.org/wiki/Vertical_and_horizontal...

    The vertical plane is used to plot an antenna's relative field strength perpendicular to the ground (which directly affects a station's coverage area) on a polar graph. Normally, the maximum of 1.000 or 0 dB is at the side (unless there is beam tilt ), which is labeled 0°, to 90° at the top and −90° at the bottom.

  9. 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 ...