discone antenna


Also found in: Wikipedia.

discone antenna

[′dis‚kōn an′ten·ə]
(electromagnetism)
A biconical antenna in which one of the cones is spread out to 180° to form a disk; the center conductor of the coaxial line terminates at the center of the disk, and the cable shield terminates at the vertex of the cone.

discone antenna

discone antenna
A wideband antenna formed of a disc and a cone, whose apex approaches and becomes common with the outer conductor or the coaxial feed at its extremity. The center conductor terminates at the center of the disc that is perpendicular to the axis of the cone.
Mentioned in ?
References in periodicals archive ?
Limited tenders are invited for procurement of discone antenna v/uhf ground tx/rx
active monopole antenna works in the bandwidth at 100 Hz ~ 30 MHz; bi-conical antenna at 30 MHz ~ 300 MHz; log-periodic antenna at 200 MHz ~ 1000 MHz, and discone antenna at 200 MHz ~ 1300 MHz.
On the other hand, a discone antenna [16, 17] is wideband and can be considered as a special case of biconical antennas [18].
If a discone antenna structure is applied to the UHF band directly, its features cannot be maintained: due to the relatively long wavelength of the UHF band, the height of a discone antenna is large which makes the antenna difficult to be conformal and of low-profile [22-25].
In [26], a lumped-element loading method was used to widen the frequency bandwidth and the resultant discone antenna was made to have a height of less than 0.
The antenna is built on a modification of a discone antenna that is flattened but with additions of a back cavity, a short-circuiting structure and a two-plate top structure.
It is built on a discone antenna that is flattened but with three major additions: (1) an open-end cylindrical cavity that surrounds the cone, (2) a short-circuiting structure that is made of an open-ended cylindrical wall with its upper edge connected to the top circular plate of the discone antenna through three solid metal angles placed 120[degrees] apart, and (3) a circular metal plate added above the top circular metal plate with supporting metal posts in between the two plates (forming a parallel plate structure above the top of the cone).
In other words, the proposed antenna has the discone antenna as its basic part but with a large cone angle to reduce the height.
The open-end cylindrical wall and the three angle metals form the short-circuiting structure that provides short-circuited current paths between the top circular plate of the discone antenna and the ground or the bottom of the cone (see Figure 1(b)).
The two-plate top structure is composed of the two parallel plates, one being the circular top plate of the discone antenna and another being the one above it; the two plates are connected by several thin metal posts (see Figure 1).
It has two plate mode-stirrers, a turn-table platform (on which a wideband discone antenna is mounted), and three antennas mounted on three orthogonal walls (referred to as wall antennas hereafter).
Tenders are invited for V/Uhf Discone Antenna Model Vda 2627