Electronics > RF, Microwave, Ham Radio

The 3.7 m dish antenna of Voyager

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prabhatkarpe4:
I need to know how Voyager-I was able to communicate with the base station on earth using the 3.7m dish antenna? Usually any dish antenna needs to be pointed towards the receiver and Voyager must be in random direction.

Andy Chee:
As of today, Voyager still has just enough electricity for dish pointing, so not random direction.

But power is definitely low, and is expected to run out after 2025.

BrokenYugo:
IIRC they use two big dishes, one right on target, one slightly off, because both receive about the same noise the data can be picked out by looking at the difference between the two signals. Bitrate is also kept very low, google seems to indicate they run no more than 160bps.

PA0PBZ:
https://eyes.nasa.gov/dsn/dsn.html

At the moment 40 bits/second, signal strength -160 dBm

This may interest you too:

joeqsmith:
This could be total BS.  As we age, these memories become faint.   

I thought maybe in the 80s that Texas Instruments collaborated with Toshiba (or some other Japanese company) to develop new receivers based on quantum well technology to get the sensitivity they needed to push the spacecraft out further.   

Again, could be a total memory failure on my part.   It seems that I had read about it in EDN or some other trade magazine.   

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