Displaced-axis-ellipse reflector antenna for spacecraft communications

Prata, A.; Moreira, Fernando J. S.; Amaro, Luis R.

doi:10.1109/imoc.2003.1244891

Cited by 20 publications

(8 citation statements)

References 4 publications

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“…The antenna has a uniform phase distribution across the aperture. A detailed example for the advantages of an antenna application with ADE configuration is introduced in [6]. In order to enhance the RF performance and to minimise the influence on the spacecraft the antenna was optimised.…”

Section: Steering Unitmentioning

confidence: 99%

Steerable Ka-band dual reflector antenna

Gabriel

Kozilek

Hartwanger

et al. 2016

2016 German Microwave Conference (GeMiC)

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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.

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Section: Steering Unitmentioning

confidence: 99%

Steerable Ka-band dual reflector antenna

Gabriel

Kozilek

Hartwanger

et al. 2016

2016 German Microwave Conference (GeMiC)

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“…Simulated directivity of 34.1 dBi corresponds to an aperture efficiency of 67%. In, 6 an X‐band 1.25 m aperture diameter ADE reflector for spacecraft communications is presented. The predicted directivity of the antenna was 38.0 dBi at 7.167 GHz, which corresponds to an aperture efficiency of about 70% 7 .…”

Section: Introductionmentioning

confidence: 99%

“…However, a variable beamwidth dual reflector antenna of ADE geometry has not been proposed. It has been found that the ADE reflector provides an excellent choice for compact high‐gain spacecraft antenna applications 6 . Therefore, it is meaningful to propose an ADE variable beamwidth reflector antenna.…”

Section: Introductionmentioning

confidence: 99%

E ‐band high aperture efficiency reflector antenna with adjustable beamwidth

Jiang

Yao

Xiu

et al. 2021

Int J RF Microw Comput Aided Eng

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This paper presents an E‐band axial displaced ellipse (ADE) reflector antenna with the characteristics of both high aperture efficiency and adjustable beamwidth. Optimization of slightly shaping the subreflector is adopted for a higher aperture efficiency of the entire antenna. Defocusing effect of moving the subreflector can effectively increase the beamwidth, and half‐power beamwidth (HPBW) is adjusted by axially moving the subreflector. The reflector antenna is simulated, fabricated and measured. The aperture efficiency is increased to approximately 75% after optimization. The measured gain of 45.6 ± 1 dBi from 71 to 86 GHz agrees well with the simulation. Also, the measured HPBW achieves an increase of more than five times changing from 0.88° to 4.4° at 71GHz, 0.86°‐5° at 86GHz. It is the first time to achieve high aperture efficiency ADE reflector antenna with adjustable beamwidth, which is of great significance for compact aircraft antenna applications.

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“…During the construction of the antenna, the designer situates the sub-reflector inside the aperture of the parabola. This is relatively easy because the focus points of ADE are quite flexible; this provides less depth to the antenna [18].…”

Section: Introductionmentioning

confidence: 99%

Axially displaced elliptical reflector antenna design with a switchable feeder for ultra‐wide band applications

Kenan¹,

Çalışkan²

2018

IET Microwaves, Antennas & Propagation

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This study presents a novel compact high gain dual reflector antenna design with a switchable feeder for ultra‐wide band (UWB) applications. The design comprises a main parabola, a replaceable feeder antenna that is chosen depending on the requirements in a given situation, and an axially displaced elliptical sub‐reflector. The functioning of two different feeder antennas with manual switching option, the partly dielectric loaded K‐Vivaldi and double‐ridged horn (RH), is discussed in this research study. When the K‐Vivaldi is employed, the dual reflector antenna is more appropriate for impulse radiation with 33:1 operational bandwidth, ranging from 600 MHz to 20 GHz. The double‐RH feeder antenna displays more efficiency than the K‐Vivaldi one; however, the bandwidth in this case goes down to 12:1, ranging from 1.6 to 20 GHz. The sub‐reflector, situated inside the main parabola aperture with onset type of feeders, reduces the depth of the structure to 16 cm. The antenna dimensions are 60 cm × 60 cm x 16 cm. Experiments have shown that the designed antennas display good efficiency and high gain performances in UWB operations.

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Displaced-axis-ellipse reflector antenna for spacecraft communications

Cited by 20 publications

References 4 publications

Steerable Ka-band dual reflector antenna

Steerable Ka-band dual reflector antenna

E ‐band high aperture efficiency reflector antenna with adjustable beamwidth

Axially displaced elliptical reflector antenna design with a switchable feeder for ultra‐wide band applications

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