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Nick: Olli  Info
Age: 32
Location: Helsinki

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Uploaded: 12.01.2009 23:59
Categories: Electronics

Olli - It's a ~10 GHz FM-transmitter for video. I accidentally threw away all the papers about mesurments so I can't confirm the exact

It's a ~10 GHz FM-transmitter for video. I accidentally threw away all the papers about mesurments so I can't confirm the exact transmit frequency.

The basic idea is pretty simple. First there is a dielectric resonator oscillator (that gray disc on the left bottom corner). The signal is passed to a band pass filter on the right side of resonator. The there is two clas-A amplifier stages. After second stage the signal is fed to a tap in a horn antennas wave guide.

FM modulation is done by altering suply voltage of the resonator.

Oh an the most important thing... I made this transmitter by modifying a LNB which was used to receive analog satellite TV.
http://en.wikipedia.org/wiki/Low-noise_block_converter

I was able to receive picture with another LNB and SAT-receiver. Although the picture was prety noisy because the resonator on transmitter was "little" broken and it was then very unstable.


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16.01.2009 21:49 YarikoInteresting o.O Can you build few for me 8)
13.01.2009 01:12 OlliFor amateur TV broadcasts there is still some legal bands to use: http://fi.wikipedia.org/wiki/ISM-taajuusalue So maybe next time is outside of the lab with 24 GHz :)
13.01.2009 01:11 OlliI used this transmitter only in the lab. Using this kind of transmitter outside of the lab is illegal and technically it's illeagal even inside but who cares :P
13.01.2009 00:19 OlliYes :)
13.01.2009 00:13 JipaSo basicly it's a wireless video link? :) Funky looking antenna/wave guide
13.01.2009 00:08 OlliThat means more money for me, I guess =)
13.01.2009 00:03 alfonshere is only few(one?) people who have enough strengh to read that shit' And understand da.. :o sorry