2 publications

• Published Subscription 26 Apr 2019

  Designing, Constructing and Testing a 90 cm Parabolic Satellite Dish Using Fiberglass Material

  By C.I. Onah, K. C. Arinzechukwu, F. I. Elekwachi

  Abstract: In this paper, we designed and constructed a parabolic satellite dish using fiberglass material for Ku-band reception that would be able to receive stations from any transponder focused on it which may be coded or non-coded stations. To achieve this objective, a parabolic graph was plotted using the geometry calculations of a parabola (i.e., the axis of asymmetry against its directrix). From this calculation and graph, the form-work was obtained …

  Published in Research & Reviews : Journal of Space Science & Technology · Vol. 2, Issue 2, 2013 · pp. 12–26 Read article →

• Published Subscription 26 Apr 2019

  Construction of an Ultrasonic Pest Repeller

  By C.I. Onah, C.M. Iloka

  Abstract: An ultrasonic pest repeller (UPR) was constructed to repel pest like rodent from home in order to prevent damage and possible infections or diseases caused by rodents. Rodents can perceive ultrasonic sound of frequencies within the range of 20 to 65 kHz. Our UPR when tested emit varying ultrasonic frequencies approximately within the range of 20 to 50 kHz. We found that these varying frequencies are like sound produced by …

  Published in Research & Reviews : Journal of Space Science & Technology · Vol. 2, Issue 1, 2013 · pp. 1–15 Read article →