Broadside Array

broadside array

[′brȯd‚sīd ə′rā]
(electromagnetism)
An antenna array whose direction of maximum radiation is perpendicular to the line or plane of the array.

Broadside Array

 

an antenna in the form of an array of radiators, most often balanced dipoles or slot radiators, that are excited in the same phase by high-frequency currents. The maximum radiation intensity is in the direction perpendicular to the plane of the array because the fields of all the radiators are in phase in that direction. The directional pattern of a broadside array in any plane perpendicular to the plane of the array consists of a main lobe and many side lobes with widths that depend on the linear dimensions of the array (seeANTENNA, Figure 8). In order to obtain unidirectional radiation from a broadside array, the array is supplemented with a tuned or aperiodic reflector. In cases where it is necessary to simplify the feed system of a broadside array, a unidirectional traveling-wave antenna having a small gain is used as a radiator; a director antenna, helical antenna, or log-periodic antenna may be used in such cases, obviating the need for a reflector. Broadside arrays are used for a wide range of radio waves. At decameter (short) wavelengths, they are used chiefly for radio broadcasting over long distances.

G. A. KLIGER

References in periodicals archive ?
where [[alpha].sup.corr.sub.n] = k[DELTA][z.sup.broad.sub.n] are the terms that have the function of correcting the surface deformation and coincide with the phase shifts required by the PM to retrieve the pattern of the broadside array (they are given by the product between the wave vector k and [DELTA][d.sub.n] in Figure 3), while [mathematical expression not reproducible] is simply the phase shift that must be introduced into the nth element of the undeformed planar array in order to steer its main lobe into the desired direction.
All the aforementioned works adopt the PM in order to recover the pattern of broadside arrays, but a common requirement when dealing with phased arrays is to dynamically steer the main lobe towards different desired directions.
The separation between n-th and (n + 1)-th elements (dn) has been calculated using the method in [2] (Section 3) to obtain broadside array radiation.
We consider a linear broadside array of N number of mutually uncoupled isotropic radiators with inter-element spacing [d.sub.0].
Furthermore, the physical aperture of the end-fire array is much reduced compared with the broadside array, which makes the RCS of the end-fire array lower.
* Determine the antenna width based on the array's spacing requirement: For a broadside array, the element spacing (d) must be less than [[lambda].sub.o] at the highest frequency to avoid grating lobes.
A broadside array has microphones aligned perpendicular to the direction of a source of sound, and an end-fire array has microphones aligned parallel to the direction of the source.
And in the same way, the similarities in both amplitudes and phases of [I.sub.B] and [I.sub.D] also lead to the formation of a broadside array 2.
The antenna is a two-element broadside array consisting of two short helices mounted on a small common ground plane.
In this paper, the authors are presenting SIW based single antenna element and then a 1x4 broadside array to achieve desired high gain.
J., "Discussion on 'A current distribution for broadside arrays which optimizes the relationship between beamwidth and side-lobe level'," Proc.
Dolph, "A current distribution for broadside arrays which optimizes the relationship between beam width and side-lobe level," Proceedings of the IRE, vol.