Broadband waveguide-based spatial combiners

An array of tapered slotlines is inserted between rectangular waveguides. Results for a 2/spl times/4 active array at X-band are presented, indicating good combining efficiency and thermal properties as well as excellent bandwidth. To increase the device packing density and remove the lower cutoff frequency of the rectangular waveguide a coaxial combiner is also proposed. A radial arrangement of tapered slotlines is placed between two flared coaxial lines. 64 elements are combined with low combining loss over the 5 to 20 GHz band.

[1]  H. Tsai,et al.  Planar amplifier array with improved bandwidth using folded-slots , 1994, IEEE Microwave and Guided Wave Letters.

[2]  David B. Rutledge,et al.  A 100-element HBT grid amplifier , 1993 .

[3]  Cheng Sun,et al.  Millimeter-Wave Power-Combining Techniques , 1983 .

[4]  K. J. Russell,et al.  Microwave Power Combining Techniques , 1979 .

[5]  J.P. Quine,et al.  Ku-Band IMPATT Amplifiers and Power Combiners , 1978, 1978 IEEE-MTT-S International Microwave Symposium Digest.

[6]  A. Mortazawi,et al.  Two stage double layer microstrip spatial amplifiers , 1995, Proceedings of 1995 IEEE MTT-S International Microwave Symposium.

[7]  R.A. York,et al.  Quasi-optical traveling wave amplifiers , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.