Flippable and Hermetic E-Band RWG to GCPW Transition With Substrate Embedded Backshort

Abstract

In this article, a novel millimeter wave (mm-wave), fully hermetic and flippable transitioning structure between grounded coplanar waveguides (GCPWs) and rectangular waveguides (RWGs) is introduced. This transition, realized through standard printed circuit board (PCB) technology, can be employed to feed a waveguide (WG) compliant device on any face of a board given its flexibility in trace routing and component placement. The proposed structure utilizes a mix of transmission line and substrate integrated waveguide (SIW) interconnected with an in-substrate embedded back-short. The transition, in all its configurations, targets a fractional bandwidth (FBW) wider than 20% to cover the commercial E-band spectrum. Moreover, at center frequency the predicted insertion loss (IL) for both normal and flipped transitions is 0.4 and 0.46 dB, respectively. Parametric and yield analyses, together with postmanufacturing inspections have been performed to assess the robustness of the design and to identify the critical manufacturing inaccuracies. The experimental validations confirm the wideband operation with an IL bounded below 2.3 dB for the worst case of a backto-back configuration.

Low-Cost Hybrid Implementation of an Efficient E-Band Array Based on Stepped and Ridged Slots

“…The most effective way to avoid extra routing between the power divider and the radiator is to place the antenna directly on top of a sealed in-package transition as proposed in [31], imposing that the antenna should be fed vertically as in [27]. Additionally, the main corporate-feed network is composed of many H-shaped four-way power dividers inter-connected with a reduced size waveguide (2.25×1 mm 2 ) as labeled in Fig 4(a).…”

“…* Using the transition proposed in[31]. The required antenna block for fabrication are only 2 as the bottom layer will be the replaced by the package cover.This article has been accepted for publication in IEEE Open Journal of Antennas and Propagation.…”

A Compact and Wideband MMIC-to-Ridge Gap Waveguide Contactless Transition for Phased Array Antenna Front Ends

“…designing an MMIC-WG transition can be categorized into several groups. The first group encompasses transitions that utilize intermediate printed circuit boards (PCBs), which can be further classified into galvanic contact transitions between a WG and PCB signal lines [6], [7] and contactless designs [8], [9], [10]. Such transitions are prone to PCB substrate losses and require bond wires (BWs) for PCB-MMIC interconnects.…”

Experimental analysis of grounded coplanar waveguide structures based on different PCB processes with uncertainty analysis

“…It consists of a center strip conductor and side grounds on a dielectric substrate. Depending on specific requirements, such as mechanical stability, thermal management, or adaptability to other transmission lines [12,13,14,15,16], a conductor-back configuration called grounded CPW (GCPW) [9] may be used. The ground-signal-ground (GSG) configuration is suitable for a monolithic microwave integrated circuit (MMIC), as well as for interconnecting a semiconductor chip and package with wire bonding [17,18] or solder bumps for flip-chip techniques [19].…”