Design and Performance Analysis of a Log Periodic Dipole Antenna with a Frequency Range of 1350 to 2690 MHz

Abstract

The introduction of broadband systems to communication and non-communication technologies has demanded the design of broadband antennas. RF antennas have relatively small bandwidth and poor directivity while the log periodic dipole antenna (LPDA) provides better directivity and gain with wide bandwidth. For a communication link and data transmission at higher rates, wider bandwidth is required with high gain and directivity. This necessitates designing a wideband antenna. In this paper, a performance improvement and lightweight design of LPDA is proposed. This antenna is designed using scaling factor of 0.93, spacing factor of 0.16 and apex angle of 6.3°. The proposed antenna having a high gain of 8.76 dBi and consisting of 12 elements is designed for a frequency range 1350–2690 MHz. Radiation efficiency of the designed antenna is around 94.6% with peak directivity of 8.524 dBi, return loss of –17 dB and radiation intensity of 0.406 W/sr. The design is made in such a way that it can cover maximum area within its frequency range. Simulation results are obtained using HFSS software and mathematical calculations have been done by MATLAB.