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  2. Reference antenna - Wikipedia

    en.wikipedia.org/wiki/Reference_antenna

    A reference antenna is an antenna with known performance. It is normally used to calibrate other systems. It is normally used to calibrate other systems. During a relative calibration, an antenna's phase center offset (PCO) and phase center variations (PCV) are computed with respect to the reference antenna which is normally assigned zero PCV ...

  3. U.S. National Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/U.S._National_Geodetic_Survey

    The datum may be accessed via NGS's network of survey marks or through the Continuously Operating Reference Station (CORS) network of GPS reference antennas. NGS is responsible for computing the relationship between NAD83 and the ITRF. The physical components of the NSRS are reflected in its height system, defined by the vertical datum NAVD88.

  4. Numerical Electromagnetics Code - Wikipedia

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

    DF9CY - EZNEC Simulation files collection - Antenna modeling files for EZnec and 4nec2. ARRL antenna modeling files - .NEC, .YAG, and .EZ files contributed by various sources. KK4OBI - Bent and other dipole models - This web site is devoted primarily as a resource for amateur radio operators to see what happens if they bend a half-wave dipole.

  5. List of common EMC test standards - Wikipedia

    en.wikipedia.org/wiki/List_of_common_EMC_test...

    CISPR is the acronym of Comité International Spécial des Perturbations Radio, [1] or the International Special Committee for Radio Protection of IEC. CISPR Standards aim to the protection of radio reception in the range 9 kHz to 400 GHz from interference caused by operation of electrical or electronic appliances and systems in the electromagnetic environment.

  6. Wide Area Augmentation System - Wikipedia

    en.wikipedia.org/wiki/Wide_Area_Augmentation_System

    The ILS system is composed of 180 different transmitting antennas at each point built. For some time the FAA and NASA developed a much improved system, the microwave landing system (MLS). The entire MLS system for a particular approach was isolated in one or two boxes located beside the runway, dramatically reducing the cost of implementation.

  7. Antenna measurement - Wikipedia

    en.wikipedia.org/wiki/Antenna_measurement

    An antenna designer must take into account the application for the antenna when determining the gain. High-gain antennas have the advantage of longer range and better signal quality, but must be aimed carefully in a particular direction. Low-gain antennas have shorter range, but the orientation of the antenna is inconsequential.

  8. Phase-comparison monopulse - Wikipedia

    en.wikipedia.org/wiki/Phase-Comparison_Monopulse

    Phase-comparison monopulse is a technique used in radio frequency (RF) applications such as radar and direction finding to accurately estimate the direction of arrival of a signal from the phase difference of the signal measured on two (or more) separated antennas [1] or more typically from displaced phase centers of an array antenna.

  9. Antenna gain-to-noise-temperature - Wikipedia

    en.wikipedia.org/wiki/Antenna_gain-to-noise...

    Antenna temperature (T ant) is a parameter that describes how much noise an antenna produces in a given environment. Antenna noise temperature is not the physical temperature of the antenna but rather an expression of the available noise power at the antenna flange. Moreover, an antenna does not have an intrinsic "antenna temperature ...