A Simple Printed Dipole Antenna with Broadband Characteristics

This paper presents a microstrip-fed printed dipole antenna (PDA) which can cover a wide frequency band (roughly 80% for $|\mathrm{S}_{11}| \gt$ -$6 \mathrm{d}\mathrm{B}$), and maintain the omnidirectional radiation patterns in the entire operation band. The antenna shape is very simple. Two identical arms of the antenna upon two sides of an FR-4 substrate are placed inversely to each other and their shapes are similar to that of an inset-fed rectangular patch antenna. Our results show that the proposed antenna is very capable for many applications of small antennas while it has the compact size of $ 0.3\lambda\times 0.008\lambda$ at the minimum operation frequency of $|\mathrm{S}_{11}|=-6\mathrm{d}\mathrm{B}$.