logo
Most Viewed Last 7 Days
436MHz DATV Up-Converter (161)
1.8M EME Dish Project (98)
146MHz RD06+RD15 Amp (98)
Archive3 - DATV Software (91)
10GHz ATV dx 115km (91)
8.4GHz Rx Equipment (84)

Radar



Cluster Activity

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

Solar data:
SFI
72
A-Index
12
K-Index
1
Exp.K
2
Sunspots
0
Activity
qui
GMF
qui
Aurora?
no

My Weather

Date:14/12/17 Time:15:13
Temp:5C
Wind Speed:12.5mph
Wind Dir:180deg
Pressure:979.62mB
Humidity:118%
Dew Point:8.6C
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:16/08/17 15:45
M0DTS.co.uk