Phase-scanning experiments with two-reflector antenna systems

Winter, C.

doi:10.1109/proc.1968.6775

Cited by 17 publications

(4 citation statements)

References 9 publications

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“…The reflectors, in confocal configuration, are arranged so that a virtual magnified image of the array is formed in front of the aperture of the main reflector [13][14][15][16]. The magnification factor, M, relating the diameters of the main reflector and the illuminating array, represents the ratio between the focal distances of the main and sub paraboloidal reflectors.…”

Section: Design Of the Active Antennamentioning

confidence: 99%

“…For these reasons, imaging systems based on a single reflector are not considered in this development. An imaging optical system based on two reflectors can mitigate both drawbacks [13][14][15][16]. In its simpler architecture, the Gregorian configuration, the optics consist of the main reflector and a subreflector which are two confocal paraboloids (see Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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A Ku-Band Magnified Active Tx/Rx Multibeam Antenna Based on a Discrete Constrained Lens

2021

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This paper presents the design, manufacturing, and testing of a Ku-band magnified active Tx/Rx multibeam antenna based on a discrete constrained lens. Multibeam antennas based on constrained lenses generate a significant number of beams on a large operative frequency bandwidth. The main novelty and challenge in this development are associated with the combined transmitting and receiving functionality of this active array. An innovative RF building blockchain working in dual-polarization and covering both the transmitting and receiving bandwidth is successfully implemented. In order to improve the accommodation constraints and the thermal control, the active lens is magnified by two confocal paraboloidal reflectors. To validate the design procedure, experimental results are compared with numerical ones.

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Section: Design Of the Active Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Ku-Band Magnified Active Tx/Rx Multibeam Antenna Based on a Discrete Constrained Lens

2021

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“…In near-field reflector systems, a plane wave is used to illuminate the subdish; for the near-field Cassegrain the subdish is also paraboloidal. Other references are Winter (1968) and Dragone and Hogg (1974), Mrstik (1979Mrstik ( , 1981Mrstik ( , 1982, and Smith and Mrstik (1982). The origin of this concept is not clear, but it is at least as early as 1963 (Profera and Sciambi).…”

Section: Near-field Cassegrainmentioning

confidence: 99%

Reflectors with Arrays

Hansen

2009

Phased Array Antennas

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“…Such a movement, however, substantially degrades the antenna gain, as the feed point is no longer at the focus. Winter [2] proposed an electrically steerable antenna consisting of a tunable reflective surface illuminated by an active element. This work received its continuation when Durnan [3] used a switched parasitic antenna located at the focus as the feed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Adaptive Reactance Parasitic Antenna Dipole Array

Shuralev¹,

Umnov²,

Mainwaring³

et al. 2009

PIERS Online

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This work describes a simple, low-cost electrically steerable antenna system suitable for long-distance point-to-point links based on WiFi technology. The antenna consists of a tunable mirror, assembled as an array of closely spaced passive dipoles (scatterers) illuminated by one driven element. The scatterers are arranged in multiple layers that contribute overlapping ranges of phase shift. While collectively providing full 360 degrees of phase range, this approach enables individual scatterers to provide greater amplitude response across narrower phase bands. Smoothness of phase composition is guaranteed by the small spacing between layers (< 0.15λ). Results show that with careful design given the amplitude-phase characteristics of the scatterers, both individually and in aggregates, the antenna can form highly directional beam patterns that are controllable in azimuth and elevation. Experiments demonstrate that an antenna with 500 scatterers, with a 100 cm × 65 cm aperture, achieves 19-22 dBi of gain across 120 degrees of azimuth and 20 degrees of elevation.

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Phase-scanning experiments with two-reflector antenna systems

Cited by 17 publications

References 9 publications

A Ku-Band Magnified Active Tx/Rx Multibeam Antenna Based on a Discrete Constrained Lens

A Ku-Band Magnified Active Tx/Rx Multibeam Antenna Based on a Discrete Constrained Lens

Reflectors with Arrays

Experimental Investigations of Adaptive Reactance Parasitic Antenna Dipole Array

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