On-wafer 2D Characterization Technique for Quasi-Yagi Antenna for G-band Applications

Alharbi, K. H., Ofiare, A., Wang, J., Khalid, A. , Cumming, D. and Wasige, E. (2015) On-wafer 2D Characterization Technique for Quasi-Yagi Antenna for G-band Applications. In: Progress In Electromagnetics Research Symposium, Prague, Czech Republic, 6-9 July 2015, p. 1527.

Abstract

The G-band of the electromagnetic spectrum (140–220) GHz is of great interest for different applications such as detection of concealed weapons and explosives, aircraft navigation in adverse low visibility weather conditions, and automotive collision-avoidance radar. Planar and directive antennas integrated in monolithic microwave/millimeter-wave integrated circuits (MMIC) could offer many advantages for such applications. High directivity will ensure that most of the RF power is radiated into a specific direction and, as a consequence, offer larger coverage distance and improve the communication link in the adverse weather conditions. This paper presents a G-band quasi-Yagi antenna and an associated on wafer setup for the characterization of its radiation pattern using a vector network analyser (VNA). The designed antenna shows a wide bandwidth (return loss < −10 dB) across the entire G-band. The proposed radiation pattern setup consists of identical one receiver and multi-transmitter antennas distributed angularly around the receiver antenna. All these antennas are fabricated on the same InP substrate that makes the angular positioning precise using lithography. Apart from the transmitting antenna directly opposite the receiving antenna, the antenna under test (AUT), all other transmitting antennas were realized with longer and curved lengths of coplanar waveguide (CPW) feed lines to ensure that these antennas always faced the AUT and that they could be probed Figure 1 shows the fabricated planar quasi-Yagi antennas for on-wafer radiation pattern characterization. The antenna exhibits an end-fire radiation pattern at frequencies around 200 GHz. The setup allows for E-plane radiation pattern to be measured and there is good agreement between measured and simulated results.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wasige, Professor Edward and Khalid, Dr Ata-Ul-Habib and Cumming, Professor David
• Authors: Alharbi, K. H., Ofiare, A., Wang, J., Khalid, A., Cumming, D., and Wasige, E.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering

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