|
 |
Loran Antenna - RF Cafe Forums
|
| Orcus
|
|
Post subject: Loran Antenna
Posted: Mon Dec 05, 2005 9:53 am
|
|
|
|
|
Hi
I am trying to receive Loran (100 KHz) signal
using H field and E field antenna.
The E
field antenna has o/p impedance 50 ohms and a gain
of 20 dB. I pass this signal through a LNA (30 dB
gain) and then BPF and I get a very clean loran
signal.
The H field antenna has o/p impedance
50 ohms and a gain of 20 dB. I pass this signal
through the same circuit and then I pass it through
another 30 dB gain amplifier (as H field recieved
signals are weaker than E field received ). I dont
get a clean loran signal.. It is pretty messed up.
I know that my second amplifier works good as
I have tested it with the E field antenna.
What is the problem. Is H field antenna highly
sensitive and hence it picks up a lot of noise,
reflections.
I thought impedance matching could
be a problem... but then the E field works with
the same circuit.
Please guide me on this
problem.
|
|
Posted 11/12/2012
|
|
|
|
