S band digital HD LNBF

Discussions about low-noise blocks, waveguides, horns and other components used at the prime focus of your reflector dish.
buzzie
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S band digital HD LNBF

Post by buzzie » Thu Dec 11, 2014 6:54 pm

Well though I would ask. Am planning on getting a KU band to add to my C band LNB. Came across this S band. Any comments on this LNB for North America?

Spec.
Input Frequency: 2.3 to 2.7Ghz, 2.2 to2.7Ghz, 2.5 to 2.9Ghz, 2.3 to 2.9Ghz
L.O. Frequency: 3650,3750,3850,3950MHz
Output Frequency:950 to 1350 MHz, 1050 to 1550 MHz, 1050 to 1650 MHz
L.O. Stability: 1.5MHz(-40to+70/25)
Noise Figure:0.4DbConversion
gain:50dB

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Re: S band digital HD LNBF

Post by hd150 » Fri Dec 12, 2014 1:34 am


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Re: S band digital HD LNBF

Post by tvroadmin » Fri Dec 12, 2014 5:44 pm

So S-band is used for radio transmissions like Sirius XM? Anything FTA worth adding to our satellite charts? If so, I could look into it.
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buzzie
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Re: S band digital HD LNBF

Post by buzzie » Fri Dec 12, 2014 8:18 pm

Well did a little reading and seem that Asia seem to be using S band.
http://www.lyngsat.com/SES-7.html
http://en.wikipedia.org/wiki/Indovision
http://indovisionsat.yolasite.com/cara- ... vision.php
Hope I'm not in trouble by posting live links.The last link show a S band set up. The language is not English but there seem to be a use out there other then radio transmissions for S band.Not sure if it needs a better look at.Not sure if there is any FTA channels using S band.

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Re: S band digital HD LNBF

Post by Foxcreek » Wed Aug 10, 2016 3:10 pm

Buzzie,

Here's an S band LNBF that is readily available:
SCAN0004.PDF
(481.48 KiB) Downloaded 560 times
Attachments
IMG_0211.JPG
IMG_0212.JPG
IMG_0210.JPG

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Re: S band digital HD LNBF

Post by Foxcreek » Wed Aug 10, 2016 3:28 pm

Buzzie,

The PDF file is what I was referring to above...... the bottom
3 pictures represent my most recent attempt at S band.

Most of the activity on S band that I've found is at a much lower
frequency band. typically 1900 - 2400 MHZ. Most of this is Amateur
Radio Satellites. But there is quite a lot of stuff in this range.

If you Google S band space craft you'll find quite a bit.

foxcreek :cool2

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Re: S band digital HD LNBF

Post by elko » Wed Aug 10, 2016 5:15 pm

Very nice, foxcreek! :thumbsup

Are those parasitic (director) elements in the focal region of the reflector? :thinking I see one active (driven) element in your primary feed...

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Re: S band digital HD LNBF

Post by Foxcreek » Wed Aug 10, 2016 5:49 pm

elko,

Yep that's a 14 element Yagi ( 12 directors, 1 reflector, 1 driven element )
Designed for WI - MAX ( 2.5 - 2.7 Ghz. ) 18.0 dB gain. Combined with the
30 inch dish about 40 dB gain total not counting the gain of the downconverter
( Drake MMDS band ) .

This of course is all analog so all those digital signals out there sound like buzzer's
on an AM detector !

foxcreek :cool2

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Re: S band digital HD LNBF

Post by Foxcreek » Wed Aug 10, 2016 7:36 pm

ALL,

Here's a Link to S band satellites: http://www.zarya.info/Frequencies/FrequenciesSband.php

foxcreek :cool2

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Re: S band digital HD LNBF

Post by Titanium » Thu Aug 11, 2016 2:12 pm

What is the purpose of director and reflector elements in an antenna design based on a signal convergence point? Shouldn't a single driven element be placed at the focal point?

What is the performance when placing a director element at the convergence point vs a single driven element or a driven/reflector?
Titanium - Brian Gohl
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