Development of a compact antenna for global earth coverage

Abella, C.; Peces, J.; Marín, Manuel A. Fernández-Villacañas; Martínez, J.A.; Markus, K.

doi:10.1109/euma.1993.336745

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…Lens antennas are good candidates for this application at millimetre waves, and different solutions have been addressed before [1]- [3]. The present paper intends to explore and compare alternative lens configurations, with the main emphasis put on the reduction of antenna size to less than 6λ 0 .…”

Section: Introductionmentioning

confidence: 99%

Benchmark of lens antennas for KA-band global earth observation from leo satellites

Costa

Fernandes

Godi

et al. 2006

2006 First European Conference on Antennas and Propagation

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This paper compares two different compact lens antenna approaches for a global Earth observation application at 26GHz. Lens specifications were defined by Alcatel Alenia Space within the framework of ACE Network of Excellence activities. The lenses are required to match a secant square type radiation pattern template in the elevation plane. Two alternative specifications are defined for the azimuth radiation pattern template: either omnidirectional or with a mechanically scanned sector beam to enhance gain. Two alternative lens approaches are also evaluated for the above cases: one based on an axial-symmetric dome lens geometry (developed at "Instituto de Telecomunicações", Portugal) and another one based on a fully 3D lens design (developed at "IETR", France).

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Section: Introductionmentioning

confidence: 99%

Benchmark of lens antennas for KA-band global earth observation from leo satellites

Costa

Fernandes

Godi

et al. 2006

2006 First European Conference on Antennas and Propagation

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show abstract

“…For instance, the link budget and the geographic coverage of a system are both strongly influenced by the gain, the aperture, and the shape of the beams [10][11][12]. If used on an aerial station, circular and symmetric multi-beams would produce a circular footprint in the cell just below the antenna but elliptical footprints in all the remaining cells.…”

mentioning

confidence: 99%

Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

Letizia¹,

Zürcher²,

Mosig³

2013

PIER B

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Abstract-A 3-D shaped prolate ellipsoidal dielectric lens is designed to produce multiple asymmetric beams in Ka-band. Such radiation characteristics are useful in applications where the antenna system is mounted on platforms flying above Earth and the shape of the footprints have to be carefully controlled for different elevation angles. A set of design rules is introduced and the final designs are optimized using full-wave time-domain methods. A fully operational Ka-band antenna subsystem has been prototyped and measured. The final antenna lens has axes lengths of 62.3 mm and 57.8 mm and provides a maximum gain of 21 dB. When mounted on a stabilized platform at the altitude of 21 km (a typical HAPS scenario), this antenna provides 19 circular ground footprints of 5 km diameter each. Radiation pattern measurements show that such a lens reduces the natural beam footprint elongation unavoidable with traditional spherical lenses and confirm the validity of the proposed system.

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“…In order to avoid the congestion of this band, new data transmission systems are being defined in Ka-band, where a band is reserved for such applications. As lens antennas are good candidates at millimeter waves [8]- [10], the present paper intends to explore and compare alternative lens configurations candidate for such missions. The main challenge is to find lens solutions that offer the best tradeoff between the following simultaneous requirements: a) Shaped sec type elevation beam with the highest possible directivity; b) Very compact antenna solution (diameter and height , to cope with mass and volume restrictions; c) Compatibility with mechanical azimuth scanning of the shaped beam without needing multiple feeds or any rotary joints, ensuring uncomplicated assembly and reliable operation.…”

mentioning

confidence: 99%

Compact Ka-Band Lens Antennas for LEO Satellites

Costa

Fernandes

Godi

et al. 2008

IEEE Trans. Antennas Propagat.

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Abstract-Two new compact lens antenna configurations are presented and compared for data link communications with LEO satellites at 26 GHz. These lenses match a secant type radiation pattern template in the elevation plane while having a mechanically scanned sector beam in azimuth to enhance gain as much as possible. No rotary joints or multiple feeds are required and emphasis is put also on the compactness of the proposed solutions ( 6 0 ). Two alternative lens configurations are evaluated numerically and experimentally: one is based on modified axial-symmetric dome lens geometry, and the other one consists of a full 3-D double-shell lens antenna. In contrast to current nearly omnidirectional antennas, the directivity of our lens prototypes is above 15.4 dBi. Up to 4.2 dB loss obtained in the prototypes can be significantly reduced by using lower loss dielectrics and matching layers, without affecting the conclusions. The numerical and experimental results are in good agreement with the radiation specifications given the compact size of the antennas.

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Development of a compact antenna for global earth coverage

Cited by 7 publications

References 1 publication

Benchmark of lens antennas for KA-band global earth observation from leo satellites

Benchmark of lens antennas for KA-band global earth observation from leo satellites

Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

Compact Ka-Band Lens Antennas for LEO Satellites

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