An inline microstrip-to-waveguide transition operating in the full W-Band based on a Chebyshev multisection transformer

Abstract

An inline microstrip-to-waveguide transition covering the full W-Band is presented in this paper. Based on the theory of Chebyshev transforms, a transition has been analytically designed. The transition consists of a three section network which matches the impedance of the standard rectangular waveguide to a dielectric filled rectangular waveguide (DFRW) whose height is the same as the thickness of the substrate. Furthermore, a taper has been implemented in order to match the 50 Ω microstrip line to the dielectric filled rectangular waveguide. Good performance has been achieved in the full W-band.

Substrate integrated waveguide E‐plane tapering in low‐temperature co‐fired ceramic

“…Tapered mm‐wave waveguide transitions have been proposed previously, but they require precision milling or other fine mechanics 6,7 . A single‐sided SIW tapering has been presented using normal PCBs for lower frequencies 8 …”

“…Tapered mm-wave waveguide transitions have been proposed previously, but they require precision milling or other fine mechanics. 6,7 A single-sided SIW tapering has been presented using normal PCBs for lower frequencies. 8 At mm waves, the small size of the components presents problems for the manufacturing since the manufacturing tolerances are relative to the component size.…”

Outright W-Band chebyshev-based hollow waveguide to microstrip transition

“…Since the height of the microstrip is 0.324 mm, a transition to match the standard height of the WR-10 waveguide is necessary. This difference in height is overcame through a 5 th order quarter wavelength Chebyshev transformer [8].…”

A Simplified Design Inline Microstrip-to-Waveguide Transition

“…In this case, the transition will be designed by means of a Chebyshev adapter [22]. In addition, for the microstrip section, the authors first proposed a linear transition [23], which in this case is compared with a microstrip Chebyshev transformer. In both cases, an analytic calculation of the whole transition is proposed, which avoids full-wave optimization.…”

“…In both cases, an analytic calculation of the whole transition is proposed, which avoids full-wave optimization. Besides this comparison, the theoretical results in [23] are completed in this paper with the experimental verification of the concept.…”