For someone looking for the same topic as I am, I am answering my own question. However I am still interested in other references.
I found a page with a lot of references at:
http://www.primenet.com/~ctrask/pshift.html
This page not only contains phase shifters, but a lot of other topics as...
Does anybody know any good references to analogue phase shifters?
The intended design is roughly 30%BW @ X-band, using MIC-technology
I allready have several app.notes of several manufacturors, but i am looking especially for some synthesis papers or some good text books.