logo
Most Viewed Last 7 Days
This bit is broken!!! (7)
(7)
(7)
(7)
(7)
(7)

Radar


Cluster Activity

Spots per uW band today:
UK spotter or spotted only.

Solar data:
SFI
71
A-Index
13
K-Index
3
Exp.K
3
Sunspots
0
Activity
qui
GMF
qui
Aurora?
no

My Weather

Date:01/01/70 Time:01:00
Temp:C
Wind Speed:0mph
Wind Dir:deg
Pressure:0mB
Humidity:%
Dew Point:-20C
UKHASnet
Pulsed Radar Tests

I have been doing some radar tests on 3cm for a bit of fun, always wanted to do it but never got around to it!

Initial tests were with Pulsed operation which gave some reasonable results, main problem being de-sense from Tx noise getting into the Rx via the circulator i think.
Tests were with 1uS pulses of ~4W RF into 60cm dish, generates a fairly wide bandwidth signal as you can imagine!
A waveguide filter was fitted between the Transverter and Amplifier to clean this up a bit.

Rx was a PLL LNB after a PIN attenuator connected to a circulator.

Pulsed Block Diagram




A plot made with python script is here showing reflections at ~8-12km:

Radar Plot example



A basic version of the script produces this, script below:
Radar reflections example




radar_plot_echo.py


















Last page added:25/03/00 18:32
M0DTS.co.uk