LDS Realization of High-Q SIW Millimeter Wave Filters with Cyclo-Olefin Polymers

Abstract

In this paper, we present narrow-band substrate integrated waveguide (SIW) millimeter wave band-pass filters, designed using cyclo-olefin polymers (COP). The structures were molded, drilled, and metalized with a laser direct structuring (LDS) process. COP are a type of thermoplastic with low dielectric losses in the millimeter waveband, typically 7.5 × 10−4 at 40 GHz for the COP RS420-LDS from Zeon®. The body of the filter was realized using a molding process that facilitates the combination of thin 50 Ω microstrip access lines with high thickness microwave cavities through 3D transitions, thus making high quality factors attainable. The simulations and experimental results are presented and discussed.

Injection Compression Molding of LDS-MID for Millimeter Wave Applications

“…Seewald et al reported in [26] that the partial metallization of trench sidewalls could increase the capacitive coupling and concentrate even more field lines in the air gap, thus minimizing the losses and reducing the width of the transmission line for an LDS-MID structure. Gliese et al reported in [43] an SMD mountable high-Q SIW mmWave filter in LDS-MID technology. Additionally, by replicating the structures from a mold, sequential milling or laser milling processes are no longer required.…”

Feasibility Investigation of SIW Cavity-Backed Patch Antenna Array for Ku Band Applications

“…Substrate integrated waveguide (SIW) technology has been largely employed for the construction of couplers, filters, oscillators, amplifiers, mixers, in addition to antennas since it allows for low-cost implementation, fast prototyping, and precise manufacturing [8][9][10][11][12][13][14][15][16][17][18][19]. It can be used to improve the antenna radiation characteristics, thus obtaining better performances than those of the conventional microstrip/printed board circuits (PCB) while maintaining the typical advantages of planar technologies.…”