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BrashEndeavours

Design request? Patch-Yagi for Inmarsat

First of all, thank you for all the great posts I’ve got the chance to read. It’s really incredible what has been designed here!

Unfortunately, I do not own the antenna design software to try my project on my own.

I hope this request is allowed and it’s in the right spot.  In my browsing I could not find a design I am looking for. What I am looking to make is a patch-yagi similar to the popular wifi gun design. It will be used for amateur reception on Inmarsat messaging.

Constraints:

Fc = 1550MHz 
BW = 80MHz  
Max Physical Length = 30”   
Centre Support = 1/4” or 5/16” allthread   
Beamwidth = no concern

 

Thank you in advance for your time, antenna gurus!!
 

 

 

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,,,hi buddy...!!!

,,, first of all, I say to you, welcome to this website...!!!

,,,secondly I ask you if you refer to such an patch-yagi antenna...???

IMG_3946_s.jpg

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Hello! Yes that is the type!

But with more elements that will fit in 30”. Like this attachment.

The satellites are geostationary so beam width isn’t an issue, only bandwidth.

i would be willing to donate some money for the time to commission such an antenna design.

D94D64C8-57EE-4F99-AADE-D5B17D5EAD12.jpeg

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,,, for the frequency of 1550MHz ... ???

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 L-Band (Inmarsat AERO/STD-C) Bester Antenna RHCP polarized 1542 MHz Center Frequency..???

 

 

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Concern:

This has happened a couple times: I log onto my alt in the mines and to find that alt on the other side of Alora O.O Whats up what that? a bug?

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12 hours ago, Admin said:

 L-Band (Inmarsat AERO/STD-C) Bester Antenna RHCP polarized 1542 MHz Center Frequency..???

 

 

Yes. I cannot find that specific antenna, but that is the application!

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 I'm working on this(for 1542 MHz), does it suit you ... ??

screenshot_1914.jpg

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4 hours ago, Admin said:

 I'm working on this(for 1542 MHz), does it suit you ... ??

screenshot_1914.jpg

Yes, that looks awesome!  
I can’t wait until your design is ready so I can build it.

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,,, okay, but you can try that too...gain 14 dBi...!!!

 

bester1540mhz.jpg

,,,polarized antenna...

16.jpg

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Nooelec Inmarsat Patch Antenna - High Gain (3.5dBi) 1550MHz PCB Antenna with SMA Connector for AERO

71w2pyn7WtL._AC_SL1500_.jpg

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18 hours ago, Admin said:

Nooelec Inmarsat Patch Antenna - High Gain (3.5dBi) 1550MHz PCB Antenna with SMA Connector for AERO

71w2pyn7WtL._AC_SL1500_.jpg

I have that exact one! 
it might be good, but signals so weak it does not fit my application.

I will try to build the model you linked above!

i assume it is okay to keep adding elements at 75mm spacing?
 

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,,, this is the right model for the requested frequency...

930.jpg

 

 

931.jpg

932.jpg

933.jpg

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BrashEndeavours,I think that for the reception of the Inmarsat satellite it would be better if a parabolic dish were used...!!!

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