Single-substrate integration technique of planar circuits and waveguide filters

• Published in: IEEE transactions on microwave theory and techniques Vol. 51; no. 2; pp. 593 - 596
• Main Authors: Deslandes, D., Wu, Ke
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2003; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Chebyshev approximation; Circuits; Design engineering; Design methodology; Filters; Insertion loss; Integrated circuit metallization; Integrated circuit reliability; Integrated circuit synthesis; Mass production; Microwaves; Millimeter wave circuits; Noise levels; Planar waveguides; Reproducibility; Waveguide filters; Weight reduction
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2002.807820

The integrated planar technique has been considered as a reliable candidate for low-cost mass production of millimeter-wave circuits and systems. This paper presents new concepts that allow for a complete integration of planar circuits and waveguide filters synthesized on a single substrate by means of metallized post (or via-hole) arrays. Analysis of the synthesized integrated waveguide and design criteria are presented for the post pitch and diameter. A filter design method derived from a synthesis technique using inductive post is presented. An experimental three-pole Chebyshev filter having 1-dB insertion loss and return loss better than 17 dB is demonstrated. Integrating such planar and nonplanar circuits on a substrate can significantly reduce size, weight, and cost, and greatly enhance manufacturing repeatability and reliability.