A Frequency Reconfigurable Fractal Antenna with L Band applications

Authors

  • Sanjeev Kumar, Priyanka Tupe-Waghmare, Rohit Yadav

Abstract

The L-band of frequencies, in the 1-2 GHz range, has seen innumerable applications in the wireless domain. The challenge is to design small size antennas at these frequencies.  Fractal geometry is considered and employed as an antenna size reduction technique extensively of late. A novel fractal design in the form of hexagonal patches has been presented in this paper. Starting with a rectangle patch of dimensions 65 X 70 mm, a hexagonal sieve is carved out as an initiator, followed by four iterations to scale down the dimension to 15 mm. The microstrip line fed antenna has a defected ground in the form of an inverted “pi(?)” slot has been designed on substrate made of FR-4. Infineon BAR 63-02V PIN diodes (two), have been incorporated in the slot as switches. The simulated S11 values, the impedance bandwidth and radiation pattern at the resonant L band frequencies are obtained and found satisfactory for different switching conditions of the PIN diode. In the end, the measured results of antenna that was fabricated and tested using a Vector Network Analyzer (VNA) were found to be approximately same as the simulated ones.

Published

2020-11-01

Issue

Section

Articles