Grace à l'imagerie thermique on apprend que les antennes Starlink vont produire du miel

Ce qui pourrait confirmer le tweet de Musk disant que les antennes Starlink avait plus de module (~1780) que les antennes type AESA AN/APG-81 présente sur le F-35 (~1300).





Par contre, je ne sais pas si les abeilles vont passer l'hiver  :sweat:

Merci.
On attend avec impatience la première personne qui osera ouvrir l'antenne, pour voir ce qu'elle a dans les tripes.
Un bidouilleur qui n'a soit pas peur de détruire l'antenne, soit qui a suffisamment de compétences pour être certain de pouvoir la remonter (ou de s'arrêter avant de la détruire).

Encore une fois, cette antenne, sa complexité, c'est aussi compliqué que de lancer des centaines/milliers de satellites. C'est surtout la proposer à un tarif raisonnable qui semble très difficile.

Leon.

Comment ça, l'antenne du f35 ne coute pas 400€....

et on voit sur la photo l'action du système de chauffage de l'antenne qui aide a eviter que la glace reste

on voit mieux sur la deuxieme photo du post reddit :

Même si beaucoup de monde dit qu'il y a un système de chauffage, ça n'est clairement pas le cas.
Une antenne "phased array beamforming", ça intègre une électronique complexe, faite de centaines de petits composants électroniques (déphaseurs RF, amplificateurs RF) répartis sur toute la surface de l'antenne.
Ces composants chauffent, surtout qu'ils sont très nombreux (plusieurs centaines).
Donc l'antenne chauffe. L'antenne consomme à elle seule plus de 100W, voir les échanges sur Reddit. Et ces 100W sont consommés même quand il fait chaud, preuve que ça n'est pas dédié au dégel de l'antenne.
C'est tout, rien de plus.

Leon.

petit article sur le cout de l'antenne...

Roger Rusch, a satellite communications industry consultant at TelAstra, says he's not surprised by SpaceX's struggle with user-terminal costs.

"It's like taking ... a really state-of-the-art computer, and then connecting it to a very sophisticated array of electronics," Rusch told Business Insider. "It's one of the most sophisticated pieces of electronics that I've ever heard about, and there's a lot of sophisticated software that goes with it."

Based on the costs of comparable technology and what little is publicly known about SpaceX's pricing, the company may be losing thousands of dollars on every beta subscriber, says Tim Farrar, an industry consultant at TMF Associates. That's on top of growing capital costs for building, launching, and operating satellites.

"It seems likely that they are subsidizing [each terminal] by at least $1,000 for these initial customers, and possibly as much as $2,000," Farrar told Business Insider. "You'd need tens of thousands of customers before you got those subsidies down to $1,000 or less." (Farrar does some work for a rival internet provider but said he spoke independently for this story.)

https://www.businessinsider.com/spacex-starlink-satellite-dish-internet-user-terminal-cost-phased-array-2020-11?IR=T

oui, c'est ce que sous-entend le reste de l'article aussi :

Rusch said going out and buying a similar phased-array component individually may cost "tens of thousands of dollars." He doesn't think SpaceX's costs are that high, but noted the technology is inherently complex, making it difficult to rapidly reduce cost.

[...]

The company is likely building what are called active electronically scanned arrays, which are popular for military applications like communications and radar, says Richard Williams, an engineer and physicist who researches and develops phased-array antennas. He noted assembling user terminals in-house would cut some costs, but not by all that much since most of the expense lies with making their microelectronic components.

"It is very, very intensive process. We're talking about people in clean rooms, and all kinds of safety protocols on top of person hours, materials, and components going into the fabrication process and machinery," Williams told Business Insider, speaking independently of his employer. "If there was a big revolution in increasing the efficiency of semiconductor fabrication for these integrated circuits, then we probably would have heard something about it by now."