G8UBN Home Page



Papers, presentations and other information :-



Spectral plots of the AD9910 DDS


The Microwave SDR Project

Paper presented at Microwave Update, Philadelphia, October 2007
- Powerpoint presentation available upon request.

Synthesisers for Amateur Microwaves

Presentation given at the Crawley Microwave Roundtable, Sept 2007


New Transverter concepts

Powerpoint presentation given at the Microwave Round Table, Rutherford Appleton Laboratories April 2005.

Drake 2880 Downconverter Schematic

I've always wanted to know how things work; and the best way is to find out for yourself.  And so I've reverse-engineered the schematic for the popular Drake downconverter.  Click on the link above for details.
 

A new K-band (24GHz) Downconverter for AO-40

Powerpoint presentation that I gave at the Amsat-UK Colloquium in July 2002.    1.3MB.
The complete paper can be found in the Proceedings of the 17th Amsat-UK Colloquium, available on CDROM or bound paper book from Amsat-UK.


A state of the art 2.3GHz Low Noise Preamplifier

An article that I wrote that was first published in the June 2002 Microwave Newsletter (UK).  
Click here for the article in Word 97 Format.  The Circuit Diagram can be viewed here .


Useful links :-

Microwave Software Defined Radio Project

Simplified block diagram of uW SDR Rx.  in PDF form

 De Montfort University ARS home page   - the club which I have been a member of since my student days, many years ago

 UK Microwave Group home page

 Amsat-UK home page

 British Amateur Television Club home page

email - g8ubn@amsat.org

73 de Grant Hodgson G8UBN
 
 

 GH Engineering  home page - this is what I do for a living