Abstract
Design and implementation of a W-band on-chip bowtie-shaped slot antenna fabricated in 180-nm BiCMOS process is presented, and its performance and limitations are discussed. This antenna has a measured impedance bandwidth (S11 <; -10 dB) across the W-band frequency range and a very wide gain bandwidth, making it a candidate for wideband applications. The measured gain for this antenna is 0-1 dBi at 94 GHz. This letter also analyzes the influence of the RF probe to the on-chip antenna performance.
Highlights
S ILICON technology has proven to be a viable platform for transceivers at millimeter-wave frequencies
For future applications of mm-wave receivers/transmitters with on-chip antennas (OCAs), such as imaging and multi-gigabitper-second short-range wireless communications, it is strongly desirable to design efficient and compact antennas, which would lead to fully integrated systems with performance much higher than the current state of the art
One way to shield the OCA from the silicon substrate involves placing a ground plane at the lowest metal layer (M1) so that the thin silicon dioxide layer acts as the antenna substrate, as shown in [5]
Summary
S ILICON technology has proven to be a viable platform for transceivers at millimeter-wave (mm-wave) frequencies. For future applications of mm-wave receivers/transmitters with on-chip antennas (OCAs), such as imaging and multi-gigabitper-second short-range wireless communications, it is strongly desirable to design efficient and compact antennas, which would lead to fully integrated systems with performance much higher than the current state of the art. Studies of OCAs are important to assess performance limitations of this integrated antenna solution at mm-wave frequencies, and because. Because of the bandwidth limitations when using a ground plane on M1, we instead design and analyze the bowtie slot antenna with a ground plane below the silicon substrate. Using full-wave simulation software, we investigate the input reflection and gain of the bowtie slot antenna as well as study the influence of a close proximity RF probe on the antenna performance. The measured gain is 0–1 dBi, which is subject to some uncertainty due to interference caused by the scattering interaction between the probe and the OCA during the measurement
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