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Novel Low-Loss Millimeter- Wave Transition From Waveguide-to-Microstrip Line Suitable for MMIC Integration and Packaging

Ashraf Uz Zaman (Institutionen för signaler och system, Antennsystem) ; Vessen Vassilev (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Herbert Zirath (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Niklas Rorsman (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik)
IEEE Microwave and Wireless Components Letters (1531-1309). Vol. 27 (2017), 12, p. 1098-1100.
[Artikel, refereegranskad vetenskaplig]

This letter presents a unique low-loss transition from microstrip to full height rectangular waveguide at W-band. This microstrip transition can be made as a part of the mm-wave monolithic microwave integrated circuit (MMIC) of arbitrary size, and thus, avoid the use of bond wires at the high-frequency port of the MMIC circuit. As a result, the MMIC can be coupled directly to the waveguide. The working principle of the transition is based on electromagnetic coupling, where the coupling between the microstrip mode and the TE10 waveguide mode is achieved via a resonant cavity. A perfect magnetic conductor (PMC) surface is placed over the cavity to facilitate the smooth coupling of electromagnetic energy from the microstrip line to the cavity and then from the cavity to the waveguide. The PMC surface also suppresses the unwanted waveguide mode coupling to the oversized MMIC substrate. The measured back-to-back transition works over the frequency band of 80-114 GHz (relative BW of 35%) with minimum return loss of 13.5 dB. The total insertion loss of the manufactured prototype is found to be varying from 0.54 to 0.803 dB, which implies a single transition loss of less than 0.27-0.4015 dB in W-band.

Nyckelord: E-plane probe; electromagnetic coupling; perfect electric conductor; perfect magnetic conductor (PMC) packaging

Denna post skapades 2017-12-28. Senast ändrad 2018-01-10.
CPL Pubid: 254125


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Institutioner (Chalmers)

Institutionen för signaler och system, Antennsystem (2014-2017)
Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik


Elektroteknik och elektronik

Chalmers infrastruktur