V-Band Via-Less GCPW-to-Microstrip Transition Designed on PET Flexible Substrate Using Inkjet Printing Technology

• Published in: IEEE microwave and wireless components letters Vol. 25; no. 7; pp. 436 - 438
• Main Authors: Chahadih, A., Cresson, Pierre Yves, Mismer, C., Lasri, Tuami
• Format: Journal Article
• Language: English
• Published: IEEE 01-07-2015; Institute of Electrical and Electronics Engineers
• Subjects: Coplanar waveguides; Engineering Sciences; Fabrication; Flexible PET substrate; Frequency measurement; GCPW-to-microstrip transitions; inkjet printing; Positron emission tomography; Printing; Substrates; V-Band; Wireless communication; GCPW-to-microstrip transitions; inkjet printing; V-Band; Flexible PET substrate
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2015.2427576

In this letter, a grounded coplanar waveguide-to-microstrip (GCPW-to-MS) transition without via holes is presented. The transition is designed on a PET® substrate and fabricated using inkjet printing technology. To our knowledge, fabrication of transitions using inkjet printing technology has not been reported in the literature. The simulations have been performed using HFSS® software and the measurements have been carried out using a Vector Network Analyzer on a broad frequency band from 40 to 85 GHz. The effect of varying several geometrical parameters of the GCPW-to-MS on the electromagnetic response is also presented. The results obtained demonstrate good characteristics of the insertion loss better than 1.5 dB, and return loss larger than 10 dB in the V-band (50-75 GHz). Such transitions are suitable for characterization of microwave components built on different flexible substrates.