Millimeter-wave monolithic integrated circuit interconnects using electromagnetic field coupling

Broad-Band Microstrip-to-CPW Transition via Frequency-Dependent Electromagnetic Coupling

“…Stemming from the idea of a CPW-to-CPW transition [10], a so-called surface-to-surface transition structure [1]- [3] was successfully developed via electromagnetic (EM) coupling of the microstrip and CPW at different layers. Intuitively speaking, this transition operates on a basis of the quarter-wavelength asymmetric parallel-coupled line theorem, e.g., [11].…”

“…Intuitively speaking, this transition operates on a basis of the quarter-wavelength asymmetric parallel-coupled line theorem, e.g., [11]. The broad-band transmission behavior with low return loss was realized by widening the two slots in the CPW and the central strip conductor in the microstrip [1] or installing an additional microstrip matching circuit [3]. According to the principle of the microstrip-to-slotline transition, an alternative microstrip-to-CPW transition was recently developed using two pairs of open-circuited microstrip and short-circuited slotline stubs with radial shape [4].…”

“…In this paper, an improved broad-band microstrip-to-CPW transition is proposed using the frequency-dependent behavior of the surface-to-surface coupling [1]- [3] with extended coupled-strip conductors [12]. Due to enhanced capacitive coupling in series between microstrip and CPW strip conductors, the overall transmission passband can be expanded with two rejection zeros [13].…”

Design of -Band Transition From Microstrip to Ridge Gap Waveguide Including Monte Carlo Assembly Tolerance Analysis

“…This interconnection approach was introduced in [17] and [18], for the design of mm-wave transitions between microstrip lines and coplanar waveguides and proposed as an alternative to bond-wires when interconnecting Millimeterwave Monolithic Integrated Circuits (MMICs) to a carrier substrate. This coupling principle consists of overlapping quarter-wavelength transmission line segments, where matching elements can be also included to improve the transition performance.…”

A drop-on band-pass filter for millimeter-wave multichip modules on LTCC

“…This capacitive coupling is realized using broadside coupled microstrip lines [5], where input and output lines are on the bottom side of the substrate. To this end, the ground plane in the coupling area has to be removed and another ground plane layer of the LTCC substrate now serves as ground plane for input and output lines (Fig.…”