Dipole-disk antenna with beam-forming ring

Kildal, Per-Simon; Skyttemyr, S.A.

doi:10.1109/tap.1982.1142875

Cited by 31 publications

(9 citation statements)

References 5 publications

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“…2.4]) and [26]. The far-field of a BOR antenna has only first-order variation in and can be expressed as (4) for the y-polarized case. The BOR efficiency accounts for the power radiated in higher order -variations in the pattern, which cannot contribute to the gain of a symmetrical reflector antenna and thus represents a power loss.…”

Section: A Subefficienciesmentioning

confidence: 99%

“…This caused low efficiency, and high spillover and cross polarization; the latter being detrimental in dual polarized systems. There exist two easy ways of compensating for these deficiencies, either by using two parallel dipoles with half wavelength spacing [3], or by locating a metal ring of about one wavelength diameter above the dipole [4], [5].…”

Section: Introductionmentioning

confidence: 99%

“…He received the M.S.E.E., Ph.D., and Doctor Technicae degrees from the Norwegian Institute of Technology (NTH), Trondheim, Norway, in 1976, 1982, and 1990, respectively.…”

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confidence: 99%

See 2 more Smart Citations

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Olsson

Kildal

Weinreb

2006

IEEE Trans. Antennas Propagat.

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117

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Abstract-A novel dual polarized ultrawide-band (UWB) feed with a decade bandwidth is presented for use in both single and dual reflector antennas. The feed has nearly constant beam width and 11 dBi directivity over at least a decade bandwidth. The feed gives an aperture efficiency of the reflector of 66% or better over a decade bandwidth when the subtended angle toward the sub or main reflector is about 53 , and an overall efficiency better than 47% including mismatch. The return loss is better than 5 dB over a decade bandwidth. The calculated results have been verified with measurements on a linearly polarized lab model. The feed has no balun as it is intended to be integrated with an active 180 balun and receiver. The feed is referred to as the Eleven antenna because its basic configuration is two parallel dipoles 0.5 wavelengths apart and because it can be used over more than a decade bandwidth with 11 dBi directivity. We also believe that 11 dB return loss is achievable in the near future.Index Terms-Log-periodic antenna, multifunction, reflector antenna, reflector antenna feed, square kilometer array (SKA), ultrawide-band (UWB).

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Section: A Subefficienciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Olsson

Kildal

Weinreb

2006

IEEE Trans. Antennas Propagat.

Self Cite

117

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show abstract

“…Despite these limitations, circular patch antennas have been studied for prime-focus reflectors [1], and acceptable performances have been achieved. Patch antennas are planar in nature having smaller axial length compared to dipole, waveguide or horn antennas that are typically used as reflector feeds [2][3][4]. They can also be designed to operate wideband, multiband, and form small arrays for beam shaping or generating multiple beams.…”

Section: Introductionmentioning

confidence: 99%

Suppressing higher order modes of cavity surrounded stacked microstrip antennas for prime focus reflectors

Qudrat-E-Maula

Pour

Shafai

et al. 2015

2015 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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A cavity surrounded stacked circular patch antenna is investigated as a feed for prime-focus reflectors in this paper. The radiation patterns of this feed are slightly asymmetric in the Eplane, which are improved by a differential feeding technique using two probes. This feed has a bandwidth of 20%, and wide beamwidths which improve the overall efficiency of symmetric parabolic reflector antennas.

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“…Its supporting struts also affect the sidelobe level and cross-polarization [2]. Simpler configurations are the rear-radiating waveguide feeds such as the ring feed [3], cup feed [4], [5], hat feed [6], beamforming ring feed [7], [8], and splash plate feed antenna [9], [10]. Despite the simplicity of these feeds, each has some limitations.…”

Section: Introductionmentioning

confidence: 99%

Small reflector antenna with low sidelobes

Kishk

Shafai

2003

IEEE Trans. Antennas Propagat.

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A prime focus low sidelobe parabolic reflector antenna with self-supported feed is designed for low sidelobe applications. The parabolic reflector diameter is between nine and 12 wavelengths. A simple design is achieved to satisfy the required first sidelobe level. The design is performed numerically using a computer code for bodies of revolutions (AKBOR2). The measured radiation patterns of the 18-in reflector system are presented. Good agreement between computed and measured radiation patterns is obtained.

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Dipole-disk antenna with beam-forming ring

Cited by 31 publications

References 5 publications

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

The Eleven Antenna: A Compact Low-Profile Decade Bandwidth Dual Polarized Feed for Reflector Antennas

Suppressing higher order modes of cavity surrounded stacked microstrip antennas for prime focus reflectors

Small reflector antenna with low sidelobes

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