The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
Dec. 08, 2010
Shahrzad Jalali Mazlouman, Vancouver, CA;
Alireza Mahanfar, Vancouver, CA;
Carlo Menon, Coquitlam, CA;
Rodney G. Vaughan, Burnaby, CA;
Shahrzad Jalali Mazlouman, Vancouver, CA;
Alireza Mahanfar, Vancouver, CA;
Carlo Menon, Coquitlam, CA;
Rodney G. Vaughan, Burnaby, CA;
Simon Fraser University, Burnaby, CA;
Abstract
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.