Title :
Waveguide to microstrip transitions at 8.45 GHz
Author :
Goia, Naiara ; Kelly, Michael ; Starski, J.P.
Author_Institution :
Chalmers University of Technology, Dept of Microtechnology and Nanoscience, Microwave Electronics, SE-412 96 Goteborg, Sweden
Abstract :
This paper presents two different types of low insertion loss and good return loss waveguide to microstrip transitions intended to be used for a state-of-the-art X-band cryogenic LNA with waveguide input. In this paper, the design considerations and results of measurements at 8.45 GHz will be presented. In addition, a study of the waveguide input circuit and its matching to substrate impedance is carried out at both ambient and cryogenic temperature.
Keywords :
Circuits; Cryogenics; Electromagnetic waveguides; Impedance; Insertion loss; Isolators; Microstrip; Noise figure; Waveguide junctions; Waveguide transitions; Microstrip transition; waveguide transition;
Conference_Titel :
Microwave Conference, 2004. 34th European
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
1-58053-992-0
