Maker Pro
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How can an antenna be used for both rx and tx?

J

John Larkin

Jan 1, 1970
0
Ah, but haven't you wondered about how you could send an analog phone
signal in both direction on one twisted pair? ;-)

That uses a transformer-based "hybrid" that steers the signals. You
can do the same thing with a simple opamp circuit. It does depend on a
known line impedance, as a radar diplexer depends on a known antenna
impedance.

John
 
D

Don Bowey

Jan 1, 1970
0
In calling it black magic.

And just in the fact the he is simply off... Too far.

As usual, your reply is empty of any intelligent information. When you
don't understand a subject, why do you bother to cover it up with blatant
ignorance?
 
Hi - I was just thinking about this. How does a device in real time
share an antenna between rx and tx circuits?

Intergalactic link open
In fact for a reliable 2 way communication, say for example for
digital control,
a packet system could be used.
Look up amateur packet radio for example.
In short the transmitter / receiver is always in receive mode,
monitoring
the frequency.
When it has data to send, the data is send in the form of a
synchronous
(SDLC or HDLC) protocol, first a syc pattern, then some data bytes,
then a CRC check.
The length of such a packet can be say 2 kB.
The 'other side' receives and decodes the packet (the sync pattern is
used to
sync a PLL that generates a clock to extract the data), and if the CRC
is correct
an ACK message is transmitted after waiting for the channel to be free
for a random amount of time (in case others also want the channel).
If the CRC was not correct a NAK message is send in the same way.
The original transmitter will repeat after some time if it hears
nothing, or send
the next packet if it gets a ACK, or repeat the last packet if it gets
a NAK.

For robotics this is likely the only safe scheme.
You want to make sure the command (to do something) was received
correctly,
and possible control more then one robot (individually), and allow
feedback from sensors all at the same frequency.

Alien13297432673284768324
Intergalactic link closing
 
R

Rich Grise

Jan 1, 1970
0
As usual, your reply is empty of any intelligent information. When you
don't understand a subject, why do you bother to cover it up with blatant
ignorance?

It's the nature of the beast. Almost everyone else has had this troll
filtered for months.

Cheers!
Rich
 
M

MassiveProng

Jan 1, 1970
0
As usual, your reply is empty of any intelligent information. When you
don't understand a subject, why do you bother to cover it up with blatant
ignorance?
I designed and built antennas back in the 70's dipshit. I also did
so a year ago in the 2.5 - 5 GHz range.

What was that, asswipe?
 
M

MassiveProng

Jan 1, 1970
0
More abuse lies, and Walter Mitty fantasies.


You wouldn't know Yagi Uda from Yogi Bear.

You wouldn't know what a diversity receiver was if one bit you in
the ass.

Give it up, retard. You are a know nothing dweeb.
 
B

Brandon D Cartwright

Jan 1, 1970
0
You wouldn't know what a diversity receiver was if one bit you in
the ass.

Give it up, retard. You are a know nothing dweeb.


OK, Nice bit of googling.

Now explain to the OP how antenna diversity relates to his question.

I won't hold my breath troll.
 
M

MassiveProng

Jan 1, 1970
0
OK, Nice bit of googling.

You're an idiot.
Now explain to the OP how antenna diversity relates to his question.

You missed the point. I was talking about MY designs, and what THEY
relate to, idiot.

I won't hold my breath troll.
You're an idiot. Please... hold your breath... then die!
 
M

MassiveProng

Jan 1, 1970
0
Ignore him. It's just a mentally ill troll abusing posters for the
sake of it.


Said the stalking retard that always shows up behind my posts
blathering some adolescent horseshit.
 
B

Brandon D Cartwright

Jan 1, 1970
0
You're an idiot.

You missed the point. I was talking about MY designs, and what THEY
relate to, idiot.

So just another thread you try to hijack to blabber about you then?
 
B

Brandon D Cartwright

Jan 1, 1970
0
Said the stalking retard that always shows up behind my posts
blathering some adolescent horseshit.

Anything to say on antennas?

No?

Just the usual I am a genius all others are retards and idiots then.
 
M

MassiveProng

Jan 1, 1970
0
Anything to say on antennas?

No?

Have YOU said ANYTHING about electronics in ANY of these threads, you
total retard?

No?

Then STFU, you hypocritical twit!
 
D

Don Bowey

Jan 1, 1970
0
I designed and built antennas back in the 70's dipshit. I also did
so a year ago in the 2.5 - 5 GHz range.

What was that, asswipe?

You still have offered no information. Your "experience" means nothing if
you cannot use it to formulate a reasonable response to a question.

Bragging about your (assumed) experiences just shows again, that you are
without any serious credentials.

Get a real life and then come back.
 
D

Don Bowey

Jan 1, 1970
0
You wouldn't know what a diversity receiver was if one bit you in
the ass.

You're so dumb on this topic you don't even understand that diversity
receivers have nothing to do with the topic of this string.
Give it up, retard. You are a know nothing dweeb.

Clearly, you should take your own advice.
 
D

Don Bowey

Jan 1, 1970
0
You're an idiot.

You missed the point. I was talking about MY designs, and what THEY
relate to, idiot.

More useless bragging without any depth.
 
M

MassiveProng

Jan 1, 1970
0
Get a real life and then come back.


**** off, then don't come back.

Scalable, true diversity receivers, idiot!

In four ranges: Baseband, Standard broadcast UHF TV band, 900MHz,
2.5 GHz, and custom for the military. Voice, video, and serial data
links.

Do you even know what a "panel" configuration is? It's a clad PCB
design with a dielectric foam backing sheet.

Also, ruggedized transceivers across the same bands. Used at race
tracks, movie sets, etc. Even have a special in use on a carrier deck
with a DVR going on it.
 
M

MassiveProng

Jan 1, 1970
0
You're so dumb on this topic you don't even understand that diversity
receivers have nothing to do with the topic of this string.
Idiot. I wasn't talking about the topic, I was responding to the
OTHER TWIT's claim that I didn't do the work by stating what work I
did. It has NOTHING to do with the original thread topic, retard.
 
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