{"id":10894,"date":"2022-08-16T18:39:51","date_gmt":"2022-08-16T16:39:51","guid":{"rendered":"https:\/\/nolle.engineering\/?page_id=10894"},"modified":"2025-03-17T22:03:09","modified_gmt":"2025-03-17T21:03:09","slug":"l-band-antenna","status":"publish","type":"page","link":"http:\/\/nolle.engineering\/en\/l-band-antenna\/","title":{"rendered":"L-Band Antenna"},"content":{"rendered":"

Specification<\/strong><\/h2>\n\n\n\n

All parts 3D printed from PETG material, UV resistent and water proof.<\/strong><\/p>\n\n\n\n

<\/td>LHCP<\/strong><\/td>RHCP-7<\/strong><\/td>RHCP-10<\/strong><\/td><\/tr>
Radiating Element<\/td>3 turn<\/strong> left handed helix,
3.5mm copper wire<\/td>		7 turn<\/strong> right handed helix,
3.5mm copper wire<\/td>		10 turn<\/strong> right handed helix,
3.5mm copper wire<\/td><\/tr>
RF Performance<\/td><\/td><\/td>Measurement Report<\/a><\/td><\/tr>
Reception configuration<\/td>TV satellite dish<\/td>Direct reception<\/td>Direct reception<\/td><\/tr>
Mounting Option<\/td>Mounts in standard 40mm LNB clamp
(for offset dishes)
Universal mounting via 3-6 M4 bolts
(for prime focus dishes)<\/td>		Universal mounting via 6 M4 bolts<\/td>Universal mounting via 6 M4 bolts<\/td><\/tr>
Dimensions<\/td>Length: 186mm
Diameter: 180mm<\/td>		Length: 374mm
Diameter: 180mm<\/td>		Length: 521mm
Diameter: 180mm<\/td><\/tr>
Weight<\/td>289 g<\/td>510 g<\/td>650 g<\/td><\/tr>
Connector<\/td>N-type<\/td>N-type<\/td>N-type<\/td><\/tr>
Applications<\/td>Reception of geostationary satellite services, e.g.
Inmarsat, Iridium, digital telephony \/ data, digital weather pictures<\/td>		Reception of geostationary and LEO satellites<\/strong> when mounted to el\/az-rotor<\/td>Reception of geostationary and LEO satellites<\/strong> when mounted to el\/az-rotor

Higher gain for low elevation GEO<\/td><\/tr>
Availability<\/td>LHCP<\/a><\/td>RHCP (7 turn helix option)<\/a><\/td>RHCP (10 turn helix option)<\/a><\/td><\/tr>
CAD Model<\/td>lband_step_files<\/a><\/td>lband_step_files<\/a><\/td>lband_step_files<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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L-Band 10 turn SWR response<\/figcaption><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

Mounting Options<\/h2>\n\n\n\n
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LHCP vs RHCP mounting configurations<\/figcaption><\/figure>\n\n\n\n

 <\/p>\n\n\n\n

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RHCP 7-turn variant. Helix wire is internally supported for stability. Radome can be removed (3D printed thread).<\/figcaption><\/figure>\n\n\n\n
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LHCP 3-turn variant. The reflector can be cut out to make space for the LNB arm depending on the antenna forward position.<\/figcaption><\/figure>\n\n\n\n

L-Band station example<\/h2>\n\n\n\n

Architecture<\/h3>\n\n\n\n

See below an example on how to setup your L-Band receiver station. Signal is filtered, amplified and digitized by software defined radio then provided to software receiver running on your local PC.<\/p>\n\n\n\n

Filtering is optional, it might be necessary depending on your local RF environment (Wifi, LTE presense).<\/p>\n\n\n

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L-Band Receiver Architecture<\/figcaption><\/figure>\n<\/div>\n\n\n

Assembly and components list<\/h3>\n\n\n\n

Click on the image below to navigate to the assembly instructions of the RHCP variant:<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Decoder Software<\/h2>\n\n\n\n

A list of popular INMARSAT and others deconding software packages:<\/p>\n\n\n\n