W-band multiport substrate-integrated waveguide circuits

TLDR

Millimeter‑wave integrated passive circuits are developed for radar sensors operating at 94 GHz. The paper presents the design, fabrication, and measurement of SIW passive circuits and a new transition to WR‑10 waveguides. The circuits, including a 90° hybrid coupler and multiport SIW, are fabricated on alumina with metallized slot arrays and evaluated via S‑parameter simulations and measurements. Simulated and measured results show excellent agreement.

Abstract

Millimeter-wave passive circuits that are designed and fabricated in the form of substrate-integrated waveguide (SIW) are presented in this paper. A W-band SIW 90/spl deg/ hybrid coupler and multiport SIW circuit are made and synthesized on alumina substrate using metallized slot arrays. In order to connect the SIW circuits with WR-10 standard rectangular waveguides for measurement purposes, a new transition is also proposed and developed. Such millimeter-wave integrated passive circuits are developed for applications in radar sensors operating at 94 GHz. Performances of these circuits are evaluated and discussed on the basis of a series of S-parameter simulations and measurements. Excellent agreement between simulated and measured results is observed.