Generalized classical axially symmetric dual-reflector antennas

Moreira, Fernando J. S.; Prata, A.

doi:10.1109/8.923314

Cited by 53 publications

(21 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This class of antennas can be grouped into four categories [5], which are ADC, ADE, ADG und ADH (axially displaced cassegrain, ellipse, gregorian resp. hyperbola).…”

Section: Steering Unitmentioning

confidence: 99%

Steerable Ka-band dual reflector antenna

Gabriel

Kozilek

Hartwanger

et al. 2016

2016 German Microwave Conference (GeMiC)

View full text Add to dashboard Cite

Airbus DS GmbH has developed a Ka-band antenna assembly which offers steerable up-/ downlink connections (receive, transmit) for satellites in low earth orbit (LEO). The antenna consists of a dual reflector antenna and a mechanical steering mechanism. The pointing mechanism comprises the steering unit, a standardised azimuth stage and an elevation stage, which is custom-made.The Ka-band antenna assembly (KAA) is part of the antenna pointing assembly (APA) product family by Airbus DS GmbH. The steerable antenna system KAA was completely developed in Germany.The antenna has to fulfill strict requirements concerning gain, sidelobes and polarisation purity and the agile steering mechanism needs a highly stable and symmetric structure of the antenna. Therefore the antenna is designed as a centre-fed dual reflector antenna. The engineering model successfully passed all qualification tests. The antenna was optimised by means of a hybrid approach and different calculation techniques. In this paper both the components, Ka-band antenna and steering mechanism, are presented.

show abstract

“…This class of antennas can be grouped into four categories [5], which are ADC, ADE, ADG und ADH (axially displaced cassegrain, ellipse, gregorian resp. hyperbola).…”

Section: Steering Unitmentioning

confidence: 99%

Steerable Ka-band dual reflector antenna

Gabriel

Kozilek

Hartwanger

et al. 2016

2016 German Microwave Conference (GeMiC)

View full text Add to dashboard Cite

show abstract

“…Recently, multiwavelength Brillouin-Erbium fiber lasers (BE-FLs) with several kinds of cavity configurations have been demonstrated in the L-band region [7][8][9]. A laser comb of up to 20 lines (including the anti-Stokes) has been obtained in the L-band region using a ring-cavity laser with 10-GHz line spacing [7].…”

Section: Introductionmentioning

confidence: 99%

“…A laser comb of up to 20 lines (including the anti-Stokes) has been obtained in the L-band region using a ring-cavity laser with 10-GHz line spacing [7]. A dual-cavity BEFL that consists of two EDF ring-cavity lasers that share a length of single-mode fiber (SMF) has been reported with a 10-nm tuning range [8].…”

Section: Introductionmentioning

confidence: 99%

A novel electronically scannable log‐periodic leaky‐wave antenna

Augustin

Shynu

Aanandan

et al. 2005

Micro & Optical Tech Letters

View full text Add to dashboard Cite

An innovative phaseshifterless, wideband, microstrip leaky-wave antenna with an electronically steerable dual-pencil-beam pattern in the H-plane is presented. The log-periodic geometry of the leaky slots of the antenna results in a wide bandwidth of 25.19%. The fan beam can be steered up to 14°over the wide resonating band of the antenna. The beam is also steerable at a fixed frequency, by reactivelty loading the slots and a maximum steering angle of about 14°is observed for different capacitor values with an improved bandwidth of 33.3%. This concept is studied using passive components, but it can be

show abstract

“…The feed aperture then blocks some of the subreflector scattering, increasing the antenna return loss and reducing its efficiency. However, to a certain extent this problem can and should be corrected using instead a variation of the Cassegrain called the axially-displaced Cassegrain (ADC) geometry [2]. Basically this modified Cassegrain configuration employs a slightly pointed subreflector vertex that diverts the reflected energy away from the main reflector axis.…”

Section: The Ubiquitous Cassegrain and Some Of Its Limitationsmentioning

confidence: 99%

“…In this article another dual-reflector antenna configuration is discussed: the displaced-axis dualreflector antenna (usually referred to as the axially displaced ellipse, or ADE, antenna). This and other comparable antenna geometries have been studied by the authors during the last five years [2]. It has been found that the ADE provides an excellent choice for compact high-gain spacecraft antenna applications.…”

Section: Introductionmentioning

confidence: 99%

Displaced-axis-ellipse reflector antenna for spacecraft communications

Prata

Moreira²,

Amaro³

Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)

Self Cite

View full text Add to dashboard Cite

This work discusses the electrical characteristics of axially-symmetric dual-reflector antenna systems based on the Axially Displaced Ellipse (ADE) configuration, with emphasis on its application in compact high-gain high-efficiency spacecraft communication antennas. Relevant ADE electrical properties are compared with the corresponding characteristics of the Cassegrain geometry (a configuration commonly used in highgain spacecraft applications). It is shown that the ADE is capable of operating efficiently with electric apertures considerably smaller than the Cassegrain geometry, an important feature for small spacecraft. To demonstrate the outstanding electric performance that can be expected from the ADE, the predicted and measured results of an X-band 1250 mm aperture diameter prototype are presented.

show abstract

Generalized classical axially symmetric dual-reflector antennas

Cited by 53 publications

References 7 publications

Steerable Ka-band dual reflector antenna

Steerable Ka-band dual reflector antenna

A novel electronically scannable log‐periodic leaky‐wave antenna

Displaced-axis-ellipse reflector antenna for spacecraft communications

Contact Info

Product

Resources

About