DESIGN OF A REFLECTOR ANTENNA IN THE FORM OF A TRUNCATED PARABOLOID

Abstract

One of the fastest developing areas of radioelectronics are antennas and microwave devices. Antennas are one of the most important functional blocks of different radio engineering systems. Parabolic antennas are the most common unidirectional microwave antennas in radar systems, radio communication and radio astronomy.

A parabolic antenna in the form of truncated paraboloid is developed. The antenna is designed, and its characteristics are calculated using one of the most modern software for electrodynamics modeling, FEKO, which represents a new approach to the design of                                   three-dimensional microwave devices.

The visualized results of calculations of a parabolic antenna in the form of a truncated paraboloid, which are displayed in the form of graphs. As a radiator for the designed antenna a circular open-ended waveguide is chosen, which consists of two parts – the rectangular and the circular waveguides. For the developed antenna, the radiation patterns in the polar system in E and H planes, and the gain and voltage standing wave ratio (VSWR) are presented, designed in FEKO software. The value of the main lobe of the pattern at half power                     and  is calculated. The structure of the real antenna is shown. The results of comparisons of the values of dependency of VSWR on the frequency and radiation patterns of real and designed antennas are introduced. The parameters of the developed antenna were measured using the NI PXI-5630 network vector analyzer and the NI USRP-2901 radio device. The results of experimental studies have shown their compliance with the results of modeling. The developed antenna operates in the 4.6...6 GHz frequency range.