Telecommunications antennas for the Juno Mission to Jupiter

Vacchione, Joseph D.; Kruid, Ronald; Prata, A.; Amaro, Luis R.; Mittskus, Anthony

doi:10.1109/aero.2012.6187091

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…IsoClad 933 provides the necessary flexibility to use on double-curved surfaces with high dimensional stability and mechanical strength [24]. Materials previously used in space applications should be considered for a real scenario, such as Qzll/EX-1516, based on a prepreg fabric with quartz fibers and low loss resin, with a germanium coating on the reflectarray elements printed on Kapton to avoid electrostatic discharges (ESD) because of the small conductivity of the germanium coating [25]. The arcs and the upper dipoles will be printed on the top side of the upper Isoclad sheet, while the lower dipoles will be printed on the bottom side of the same sheet.…”

Section: A Definition Of the Reflectarray Cellmentioning

confidence: 99%

Transmit–Receive Parabolic Reflectarray to Generate Two Beams per Feed for Multispot Satellite Antennas in Ka-Band

Martinez‐de‐Rioja

Rodríguez-Vaqueiro

et al. 2021

IEEE Trans. Antennas Propagat.

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This contribution describes the design of a multibeam parabolic reflectarray to produce two adjacent beams per feed in orthogonal Circular Polarization (CP) simultaneously at transmit (Tx) and receive (Rx) frequencies in Ka-band. The Variable Rotation Technique (VRT) has been applied to reflectarray cells based on two types of resonant elements, which makes it possible to provide orthogonal beams at Tx and Rx, as well as to implement an in-band optimization procedure to reduce the cross-polarization. A 90-cm parabolic reflectarray has been designed, manufactured and tested to produce multiple adjacent beams in RHCP and LHCP at both 20 and 30 GHz. The results are satisfactory and validate the concept of generating two spaced beams in orthogonal CP by a single feed, changing the polarization of the beam between Tx and Rx. This concept can be suitable for multispot satellites in Ka-band, enabling to halve the number of onboard antennas and feeds.

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Section: A Definition Of the Reflectarray Cellmentioning

confidence: 99%

Transmit–Receive Parabolic Reflectarray to Generate Two Beams per Feed for Multispot Satellite Antennas in Ka-Band

Martinez‐de‐Rioja

Rodríguez-Vaqueiro

et al. 2021

IEEE Trans. Antennas Propagat.

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“…1 In deep-space missions, it is common to use a conical horn antenna with an appropriate Gaussian beam for the medium-gain antenna (MGA), which typically results in a gain of 10-20 dBi. [2][3][4] However, it is important to note that there are some notable differences between the TW-2 spacecraft and previous international deep-space satellites. These differences include the distribution of available ground stations, the attitude of spacecraft relative to the ground stations, and the flight orbit of spacecraft themselves, among other things.…”

Section: Introductionmentioning

confidence: 99%

“…In deep‐space missions, it is common to use a conical horn antenna with an appropriate Gaussian beam for the medium‐gain antenna (MGA), which typically results in a gain of 10–20 dBi 2–4 . However, it is important to note that there are some notable differences between the TW‐2 spacecraft and previous international deep‐space satellites.…”

Section: Introductionmentioning

confidence: 99%

X‐band dual‐band horn antenna with isoflux pattern for deep‐space applications

Liu,

Lu,

Duan

et al. 2023

Micro & Optical Tech Letters

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In this paper, an X‐band dual‐band dual‐polarized medium‐gain antenna (MGA) is designed for deep‐space satellite applications. The MGA has isoflux radiation patterns in the 7.145–7.19 and 8.40–8.45 GHz frequency bands. The concentric ring horn qualification model named MGA is developed for TIAN WEN‐2 (TW‐2) mission. MGA is fabricated and the measurements are conducted on it and its installation on the deck of the TW‐2 Radiation Mockup (RM). The performance evaluation of MGA and its corresponding RM measurements indicate an axial ratio lower than 4.0 dB and a gain higher than 5.8 dBic on the operational bandwidth at the coverage limit of 40° for all azimuth angles (φ). The calculated and measured data align exceedingly well, confirming that MGA satisfactorily meets the requirements for the forthcoming TW‐2 deep‐space spacecraft.

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“…Asymmetric designs have also shown to provide beam shaping capabilities [13]. In space applications biconical antennas are also used (see, e.g., [14]), particularly for the low or medium gain segments, as reported for example in [15], where the directivity achieved by a corrugated design shows a Full Width at Half Maximum (FWHM) of about 50 • . In this last case, the finality was to achieve a broad beam, which is exactly the opposite of what we would like to get here.…”

Section: Introductionmentioning

confidence: 99%

Tests on High-Directivity Unconventional Biconical Type Antennas

Funaro¹,

Chiolerio²

2022

Preprint

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Biconical-type antennas featuring high directivity have been designed, created, and tested in anechoic chamber. Results in the range between 1 and 5 GHz are presented in this article. In particular, two different configurations have been tested, with and without dielectric lenses, both involving rapid prototyping tools (3D printing) for the dielectric and the antenna support. A very high directivity is nowadays demanded by efficient and sustainable point-to-point communications or energy transfer protocols, to avoid releasing energy in neighboring areas and preserve data transfer security. As demonstrated here, special biconical type antennas featuring a 3D printed polylactic acid (PLA) dielectric lens can achieve a good directivity, with a corresponding emission lobe centered around 8.4 degrees, featuring a FWHM of 6.4 degrees. Dielectric lens-free antennas, featuring an unconventional shape, can also achieve a good directivity, with a corresponding emission lobe centered around 10.0 degrees, featuring a FWHM of 14.2 degrees. The preliminary results shown here explore some of the aspects of the vast configuration space (which include fabrication techniques, dielectric materials, conductive supports, etc.) and open the route for further optimization studies. The aim would be to adjust the various degrees of freedom in order to achieve what can be defined as "infinite" directivity.

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Telecommunications antennas for the Juno Mission to Jupiter

Cited by 11 publications

References 2 publications

Transmit–Receive Parabolic Reflectarray to Generate Two Beams per Feed for Multispot Satellite Antennas in Ka-Band

Transmit–Receive Parabolic Reflectarray to Generate Two Beams per Feed for Multispot Satellite Antennas in Ka-Band

X‐band dual‐band horn antenna with isoflux pattern for deep‐space applications

Tests on High-Directivity Unconventional Biconical Type Antennas

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