Abstract
Antenna is one of the important subsystem components in a radio telescope system. In this paper, analysis on the effect of parasitic element on 408 MHz antenna in a radio telescope system is presented. Higher gain up to 10.24 dBi with reduction on beamwidth size has been achieved by optimizing the position of parasitic element relative to the driven element. The proposed antenna is suitable to be utilized in a transient radio telescope array.
Highlights
Observation at radio wavelength has become a great scientific and applied importance in the field of astronomy
The objective of this paper is to show the improvement on beamwidth which can International Journal of Antennas and Propagation be obtained by utilizing parasitic element in a dipole-based antenna
The heights of λ/4 to λ/8 are chosen as it theoretically will provide the maximum gain achieved at zenith direction, a property which is important for an antenna to be employed in a radio telescope system
Summary
Observation at radio wavelength has become a great scientific and applied importance in the field of astronomy. Many new types of astronomical object have been discovered by radio astronomical methods, including quasars, pulsars, and cosmic microwave background (CMB) This development has intrigued deep exploration in the field of radio astrophysics and computation and in the radio astronomical instrumentation. As for radio astronomy application, antennas have been developed in various manners based on the objectives of the observation It plays an important role in determining the sky coverage (field of view) and angular resolution, as well as affecting the overall sensitivity of the radio telescope. Radio JOVE by NASA [5], the low frequency array (LOFAR) [6], and the eight-meter-wavelength transient array (ETA) radio telescope at Pisgah Astronomical Research Institute (PARI) [7, 8] are among the radio telescope systems which utilized dipole-based antenna
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