Simon Fraser University

Other

King Abdulaziz City for Science and Technology

Urthecast Corp.

Rodney Grant Vaughan

Alireza Mahanfar

Ying Hai Chen

Ronald John Vanderhelm

Carlo Menon

Peter Allen Fox

Abhijit Bhattacharya

Daniel Elliot Sameoto

Meenakshinathan Parameswaran

Sae Won Lee

D Andrew G Lea

Shahrzad Jalali Mazlouman

Ying Chen

A planar phased array antenna assembly includes a first face sheet with a first plurality of radiating slots for a first frequency band and a second plurality of radiating slots for a second frequency band, a second face sheet, a third face sheet, and a structure interposed between the first and second face sheets with a third plurality of radiating elements at the first frequency band and a fourth plurality of radiating elements at the second frequency band, and a first feed network for the third plurality of radiating elements and a second feed network for the fourth plurality of radiating elements, and the second face sheet interposed between the structure and the third face sheet. The planar phased array antenna assembly may form part of a synthetic aperture radar (SAR) antenna.

Efficient planar phased array antenna assembly

A data communication system has a station that includes multiple antenna elements. The station communicates to the antenna elements by way of digital data channels. Each antenna is connected to an RF module that receives data by way of a corresponding digital data channel, encodes and transmits the data. Adaptive beamforming may be performed for interference mitigation. Embodiments use the strength of pilot signals and/or error vector magnitudes as cost functions for an adaptive beamforming alogorithm such as optimum combining. Unused sub-carriers may be applied to provide in-band communication to facilitate channel switching, data reallocation and other interference mitigation strategies.

Reassignment of data among subcarriers in wireless data communication

Novel reconfigurable antennas are provided which may be used to accommodate the requirements for wideband multi-standard handheld communication devices. It is shown that using a shape memory alloy spring actuator, the height of a helical antenna and therefore the pitch spacing and angle can be varied. This can in turn tune the far-field radiation pattern and gain of the antenna dynamically to adjust to new operating conditions. The radiation pattern can further be directed using a two-helix array. Finally, a helical antenna embodiment is implemented and measured using a shape memory alloy actuator. Measurement results confirm that while keeping the centre frequency constant, gain tunability can be attained using this structure.

Reconfigurable axial-mode helical antenna

Lithographically fabricated apparatus are provided. The apparatus are capable of self-assembly to extend at least in part in an out-of-plane direction. A cantilever arm is anchored to a substrate at one of its ends and fabricated to provide a cantilever portion that extends from the anchor in a longitudinal direction generally parallel to the substrate, One or more posts are fabricated atop the cantilever portion. The posts shrink from a first volume to a second volume, less than the first volume, during fabrication thereof. The change in volume of the post from the first volume to the second volume causes stress between the post and the cantilever arm resulting in the cantilever portion bending from an in-plane orientation extending in the longitudinal direction to a self-assembled orientation extending at least in part in an out-of-plane direction away from the substrate.

Lithographically controlled curvature for MEMS devices and antennas

Growing community of inventors

Burnaby, Canada

Rodney Grant Vaughan