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Wednesday, February 3 • 09:20 - 09:40
Dual-Band VHF/UHF Monopole with Double Loop Antenna for Nanosatellites

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Aleksandr is a nanosatellite of 10 cm x 10 cm x 30 cm as a 3U CubeSat designed and built by the Space Concordia team at Concordia University during the second and third entry into the Canadian Satellite Design Challenge (CSDC). Its mission is to study the long-term performance of a new self-healing material in a microgravity environment. This material is developed at Concordia’s Centre for Composites (CONCOM). The uplink and downlink communication system of Aleksandr depends on a single antenna, and the separation of the transmitted and received signal is achieved by a diplexer. In this work, the novel antenna design is implemented and fabricated at Concordia’s Antenna and Microwave Research Center Laboratories. The antenna is made of spring-steel, the attachment of the arches are designed to be flexible and easy to fold around the nanosatellite and to straighten themselves in the deployment stage. The antenna consists of a λ/4 monopole attached to two separate parabolas which generate two different resonant modes at 146 MHz and 438 MHz. The resonant modes optimization can be achieved easily by two parabolas, the first controls lower band, and second controls the upper band which greatly enhances the impedance bandwidth. The dual-frequency antenna operates with - 10 dB impedance bandwidths for bands from 136 to 160.4 MHz and 416 to 466 MHz. In addition, the proposed antenna maintains good omnidirectional radiation patterns over the operating bands, and achieves a gain of 1.97 dB at 146 MHz and 3.04 dB at 438 MHz in simulations.


Moderators
avatar for Carlos Lange

Carlos Lange

Associate Professor, University of Alberta, ISSET
Computational Fluid Dynamics, Planetary Atmospheres, CubeSats

Speakers
ZB

Zouhair Briqech

Student, Concodia University/ Space Concordia



Wednesday February 3, 2016 09:20 - 09:40
Provence Room 45 The Esplanade, Toronto, ON M5E 1W2

Attendees (4)