beam antenna


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beam antenna

[′bēm an′ten·ə]
(electromagnetism)
An antenna that concentrates its radiation into a narrow beam in a definite direction.

beam antenna

beam antenna
A beam antenna for HF operation.
A directional antenna that transmits its signals along a very narrow path. These antennae are advantageous both for transmitting and receiving. The forward gain enhances the range, and a good front-to-back ratio and narrow bandwidth aid in preventing interference to and from stations in the directions other than the desired stations.
References in periodicals archive ?
With the use of a low-power wide beam antenna, the described system enables communication coverage for aircraft with fewer beams, fewer antennas and receivers onboard a satellite thus reducing its payload, hardware and ground stations requirements, and results in a more reliable service that can be achieved with less switching and traffic handover issues.
3m earth deck reflectarray for a Ku-band contoured beam antenna," Proc.
A compact conical beam antenna has been proposed based on the QMSIW array, which is consisted of six isosceles right-angled triangle metallic patch printed on the upper side of the substrate in a windmill-shape and diagonal periodic metallic via holes drilled along the hypotenuse of the triangle patch.
Printed S-band 4 x 4 Nolen matrix for multiple beam antenna applications," IEEE Trans.
The Defense Satellite Communications System III (DSCS III) satellites transmit and receive through SHF multiple beam antennas (MBA) with programmable beam forming networks (BFN).
Krainiksh, "A horizontally polarized omnidirectional beam antenna using array of axial slot on cylindrical surface," The 3rd International Conference on Microwave and Millimeter Wave Technology, 576-579, 2002.
In association with a switch matrix, a multiple beam antenna can also be used for electronic beam steering, replacing mechanical beam steering in radar applications [3].
For realistic comparisons, we also use measured data of a broad beam and a shaped beam antenna (see Fig.
Now using a single MTI wide beam antenna on each side of the portal results in a constant reading state and eliminates the need to switch between upper and lower antennas.
The radiation pattern produced by such a switchable beam antenna has 14 main lobes that are wide in elevation (approximately 60 [degrees] for the antenna elements used) but narrow in azimuth.
Innovative multi-beam antenna technology gives the cell sites their Super status with each providing network capacity double that of traditional, single beam antennas.