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  2. Omnidirectional antenna - Wikipedia

    en.wikipedia.org/wiki/Omnidirectional_antenna

    Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =. A useful relationship between omnidirectional radiation pattern directivity (D) in decibels and half-power beamwidth (HPBW) based on the assumption of a sin ⁡ ( b θ ) / b θ {\displaystyle \sin(b\theta )/{b ...

  3. Antenna measurement - Wikipedia

    en.wikipedia.org/wiki/Antenna_measurement

    Antenna measurement techniques refers to the testing of antennas in order to ensure that the antenna meets specifications or simply to characterize it. Typical antenna parameters are gain , bandwidth , radiation pattern , beamwidth , polarization , impedance ; These are imperative communicative means.

  4. Whip antenna - Wikipedia

    en.wikipedia.org/wiki/Whip_antenna

    Whip antenna on portable FM radio receiver Whip antenna on car. A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. A whip antenna is a form of monopole antenna. The antenna is designed to be flexible so that it does not break easily, and the ...

  5. Directional antenna - Wikipedia

    en.wikipedia.org/wiki/Directional_antenna

    A high-gain antenna (HGA) is a directional antenna with a focused, narrow beam width, permitting more precise targeting of the radio signals. [1] Most commonly referred to during space missions , [ 2 ] these antennas are also in use all over Earth , most successfully in flat, open areas where there are no mountains to disrupt radiowaves.

  6. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    The category of simple antennas consists of dipoles, monopoles, and loop antennas. Nearly all can be made with a single segment of wire (ignoring the break made in the wire for the feedline connection). [citation needed] Dipoles and monopoles called linear antennas (or straight wire antennas) since their radiating parts lie along a single ...

  7. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    Typically, the boresight gain of an antenna is related to the beam width. [26]: 257 For a rectangular horn, Gain ≈ 30000/BW h.BW v, where BW h and BW v are the horizontal and vertical antenna beamwidths, respectively, in degrees. For a circular aperture, with beamwidth BW c, it is Gain ≈ 30000/BW c 2.

  8. Parabolic antenna - Wikipedia

    en.wikipedia.org/wiki/Parabolic_antenna

    For the Arecibo antenna at 2.4 GHz, the beamwidth was 0.028°. Since parabolic antennas can produce very narrow beams, aiming them can be a problem. Some parabolic dishes are equipped with a boresight so they can be aimed accurately at the other antenna. There is an inverse relation between gain and beam width.

  9. Full width at half maximum - Wikipedia

    en.wikipedia.org/wiki/Full_width_at_half_maximum

    When half-power point is applied to antenna beam width, it is called half-power beam width. Specific distributions. Normal distribution

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