A simple modification in a rectangular patch element is exploited to design frequency selective surfaces (FSS) for multiband bandstop filter operation. The use of the modified rectangular patch elements enables the adjustment of FSS parameters (resonant frequency and 210-dB bandwidth) according to the length and position of the slot but without modifying their original size. Transmission properties of proposed FSS are characterized by means of simulations and measurements. Four FSS prototypes were fabricated and measured. The obtained results show an interesting multiband behavior.ABSTRACT: A pattern reconfigurable planar Yagi-Uda antenna is presented which operates around 1.5 GHz. The pattern reconfigurability consists in changing the end-fire main beam to opposite directions. It is achieved by switching the reflector and director elements suitably using PIN diodes such that reflector, dipole, and director arrangements are realized in two opposite directions. Antenna was fabricated and measured to verify impedance matching and radiation patterns. Measured impedance matching fractional bandwidth is 9.33% around 1.50 GHz and compares well with the simulated data. Measured radiation patterns confirm end-fire pattern reconfigurability as expected from the simulations. This antenna can find applications in back-to-back repeater antenna systems.