A W band Self-packaged SIW-based Slot Antenna with Gain and Bandwidth Enhancement

• Published in: IEEE transactions on antennas and propagation Vol. 71; no. 3; p. 1
• Main Authors: Huang, Yin-Shan, Zhou, Liang, Xu, Qi-Hao, Mao, Jun-Fa
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Antenna feeds; Antenna measurements; Antennas; Bandwidth; Bandwidths; BCB; Circuit boards; Coplanar waveguides; gain and bandwidth enhancement; heterogeneous integration; High gain; Impedance; Loss measurement; MEMS; Parasitic elements (antennas); parasitic folded patches; Photosensitivity; Printed circuits; Radar antennas; Radar detection; Radar imaging; self-packaged; Silicon; Silicon wafers; SIW slot antenna; Slot antennas; Substrate integrated waveguides; Synthetic aperture radar; W band
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2023.3236764

This study presents the design of a self-packaged substrate integrated waveguide (SIW)-based slot antenna with a low profile at the W band. A 1 × 4 SIW slot antenna array is developed using a standard printed circuit board (PCB) process. Then, the array is embedded in a silicon wafer. The loss of the benzocyclobutene (BCB)-based coplanar waveguide with ground (CPWG) to PCB-based SIW transition is investigated and measured to interconnect and integrate the antenna array with other components. The performance of the SIW-based slot antenna is enhanced about 2 dB without extra feeding networks by using a novel method of parasitic folded patches, the fractional impedance bandwidth is increased from 10 % to 15 % by changing the metallic posts besides the SIW. The antennas are fabricated using our in-house silicon-based MEMS photosensitive composite film BCB fabrication process which is described in detail. The proposed antenna has a measured maximum gain of 11.7 dBi at 98 GHz, with a fractional impedance bandwidth of 17 %. Measured results show a close relationship with the simulated values. Compared with other antennas, our proposed antenna exhibits excellent performance, such as high gain, low profile, low loss interconnection structure and broad bandwidth. Finally, a novel heterogeneous integration transceiver application is introduced. In this application, self-packaged SIW-based slot antennas are integrated with different types of chips. This 1T2R transceiver can be further used in long-range radar detection, vital sign monitoring, and synthetic aperture radar imaging.