A full ka-band microstrip-to-waveguide transition using tapered CPS probe and V-antenna

A novel Ka-band microstrip-to-waveguide transition is presented in this paper. This transition is composed of a tapered coplanar strip (CPS) and a V-antenna which are inserted from E-plane center of a rectangular waveguide end. The mode transformation between waveguide and microstrip is achieved by electric field structural conversion in these two components. The impedance matching was also considered in the CPS design. The transition has characteristics of in-line structure, integration feasibility and compatibility in monolithic microwave integrated circuit (MMIC) technology. The Ka-band back-to-back transition fabricated on RT-duriod 5880 substrate demonstrates more than 85% bandwidth with overall measured insertion loss less than 1.5dB and return loss better than 15dB.

[1]  D. Pozar Microwave Engineering , 1990 .

[2]  A. Comerón,et al.  Waveguide-to-coupled fin-line transition in Ka band , 1996 .

[3]  J. Xu,et al.  Compact, broadband waveguide-to-microstrip transition using slotline antenna , 2010, 2010 International Conference on Microwave and Millimeter Wave Technology.

[4]  T. Itoh,et al.  A broad-band microstrip-to-waveguide transition using quasi-Yagi antenna , 1999 .

[5]  B.M. Reljic Balunless Microstrip to Waveguide Transition for X Band , 2006, 2006 IEEE Annual Wireless and Microwave Technology Conference.

[6]  Quan Xue,et al.  An In-Line Waveguide-to-Microstrip Transition Using Radial-Shaped Probe , 2007, IEEE Microwave and Wireless Components Letters.

[7]  M. Salazar-Palma,et al.  Ka-band waveguide-to-microstrip transition design and implementation , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).

[8]  Branka Jokanovic,et al.  Wideband microstrip-to-waveguide transition using double-y balun , 2006 .

[9]  Young-Ki Cho,et al.  A New Ultra-wideband Microstrip-to-CPS Transition , 2007, 2007 IEEE/MTT-S International Microwave Symposium.