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I designed, prototyped and tested a nanosatellite payload to be lauched.
The payload is an antenna meant to calibrate CHIME's ground based radio telescopes.
Shown above is the first physical prototype for a low frequency, broadband, planar antenna. For extensive details please see:
Design Specifications:
Lightweight (< 500g)
Small (max vol. < 10x10x30cm)
Cheap ($500 range)
Broadband (500 – 800MHz)
Omni-directional
Non-Deployable or Easily Deployed
Simulations were carried out using CST Microwave Studio while experiments were carried out in an anechoic chamber using a Vector Network Analyzer (VNA). The designed antenna satisfies the design specifications, radiating with sufficient efficiency between 475-775MHz.
Top: S11 response simulation vs experiment
Middle: Measured S11 response on Smith Chart.
Bottom: UBC-RSL Anechoic chamber.
The simulated radiation pattern is nearly omni-directional with a gain of 6dBi when viewed directly on axis.
The radiation bandwidth was explored and is in alignment with the impedance bandwidth.
2D radiation patterns as a function of elevation angle
Top: 450MHz
Middle: 600MHz
Bottom: 800MHz
Simulated surface current distributions for several geometries suggested design modifications.
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