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Most array antennas can be divided into two classes based on how the component antennas' axis relates to the radiation direction. A broadside array is a one or two dimensional array in which the direction of radiation of the radio waves is perpendicular to the plane of the antennas. To radiate perpendicularly, the antennas must be fed in phase.
Is a high gain antenna used at UHF and microwave frequencies which is electronically steerable by phase adjustments, from being an endfire array to a broadside array, and every direction in between. It consists of multiple dipoles in a two-dimensional array, each fed through an electronic phase shifter , with the phase shifters controlled by a ...
This often involves a number of parallel dipole antennas with a certain spacing. Depending on the relative phase introduced by the network, the same combination of dipole antennas can operate as a "broadside array" (directional normal to a line connecting the elements) or as an "end-fire array" (directional along the line connecting the ...
Broadside (antenna engineering), a type of radiation pattern for a linear array antenna where the axis of the main lobe is perpendicular to the axis of the array. Topics referred to by the same term This disambiguation page lists articles associated with the title Broadside .
Most antennas boresight axis is fixed by their shape and cannot be changed. However phased array antennas can electronically steer the beam, changing the angle of the boresight by shifting the relative phase of the radio waves emitted by different antenna elements, and even radiate beams in multiple directions (multiple boresights). [1]
If a wave is incident upon the array at broadside, then a 180° phase difference will be measured between the elements, corresponding to a 90° AoA. In single antenna case, data-driven techniques [2] are powerful tools to estimate AoA, capitalizing on the inherent imperfections of the antenna. In optics, AoA can be calculated using interferometry.
A linear antenna array will produce a beam perpendicular to the line of elements (broadside beam) if they are all fed in phase. If they are fed with a phase change between elements of 2 π d λ {\displaystyle 2\pi d \over \lambda }
Turnstile antennas can be stacked and fed in phase to realize an omnidirectional broadside array or phased for an end-fire array with circular polarization. The batwing antenna is a turnstile antenna with its linear elements widened as in a bow-tie antenna, again for the purpose of widening its resonant frequency and thus usable over a larger ...