{"id":16237,"date":"2026-09-18T14:39:04","date_gmt":"2026-09-18T12:39:04","guid":{"rendered":"https:\/\/nolle.engineering\/2026\/09\/18\/iceconefeed-2200-mhz-3m-prime-focus-leo\/"},"modified":"2026-09-18T14:49:12","modified_gmt":"2026-09-18T12:49:12","slug":"iceconefeed-2200-mhz-3m-prime-focus-leo","status":"publish","type":"post","link":"https:\/\/nolle.engineering\/en\/2026\/09\/18\/iceconefeed-2200-mhz-3m-prime-focus-leo\/","title":{"rendered":"A 2.2 GHz IceConeFeed in a 3 m prime-focus dish for LEO tracking"},"content":{"rendered":"

A customer operates a rooftop ground station for S-band LEO downlinks in the 2200–2290 MHz space-operations band. The reflector is a KTI\/SAMI SI 10<\/strong>: a 10 ft (3.05 m) aluminium mesh dish from Judsonia, Arkansas, built in the US home-satellite era. The original installation manual came with it: prime focus, focal length 45 5\/8 in (1159 mm), f\/D 0.38<\/strong>. It was built for C-band TV at 4 GHz, so the mesh is a solid reflector at 2.2 GHz. The dish sits on an az\/el rotator and follows LEO passes.<\/p>\n\n\n

\"3
The SAMI SI 10 with the new feed at the prime focus.<\/figcaption><\/figure>\n\n\n

The task was the feed. The IceConeFeed is designed for 2.4 GHz and an offset dish; for this installation we built a customised unit tuned to 2200 MHz<\/strong> (IceConeFeed Customized<\/a>, 2200–2500 MHz on request), with the turn count chosen to illuminate a deep prime-focus reflector: at f\/D 0.38 the rim sits 67° off axis seen from the feed. Measured before shipping: SWR < 1.1 at 2200 MHz<\/strong>.<\/p>\n\n\n

\"IceConeFeed
Feed from the side: printed radome toward the dish, LNA and filter housing behind it.<\/figcaption><\/figure>\n\n\n

Mechanically the feed drops into the original SAMI feed plate. A 3D-printed adapter plate<\/strong> (PETG) carries the IceConeFeed base and bolts to the four SAMI studs; the N connector faces the rear of the plate, where a short pigtail runs into the black cylinder behind the feed. That cylinder is a radome housing the LNA and band filters<\/strong> right at the feed, so the noise figure is set before the long coax down the mount.<\/p>\n\n\n

\"3D-printed
The adapter plate on the SAMI feed plate, pigtail to the LNA housing.<\/figcaption><\/figure>\n\n\n
\"IceConeFeed
Feed and adapter seen from below.<\/figcaption><\/figure>\n\n\n
\"Front
Front view: the feed at the focus, radome toward the reflector.<\/figcaption><\/figure>\n\n\n
\"Hub
The original hub plate.<\/figcaption><\/figure>\n\n\n

If you have an old C-band mesh dish and want to use it for S-band or L-band satellite work: the geometry is the same problem, and we tune the feed to your frequency. Get in touch<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

A customised IceConeFeed tuned to 2200 MHz at the prime focus of a 3 m KTI\/SAMI mesh dish, feeding an S-band LEO ground station.<\/p>","protected":false},"author":3277,"featured_media":16231,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123],"tags":[47],"class_list":["post-16237","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-customer-stories","tag-ice-cone-feed","fallback-thumbnail"],"yoast_head":"\nA 2.2 GHz IceConeFeed in a 3 m prime-focus dish for LEO tracking - nolle.engineering<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nolle.engineering\/en\/2026\/09\/18\/iceconefeed-2200-mhz-3m-prime-focus-leo\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A 2.2 GHz IceConeFeed in a 3 m prime-focus dish for LEO tracking - 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