E-plane beam width reconfigurable dipole antenna with tunable parasitic strip

A 3-dB E-plane beam width (EPBW) reconfigurable dipole antenna is proposed in this paper. By introducing a tunable C-shape strip, the EPBW of the dipole antenna can switch in three different modes: narrow, middle and wide. Three pairs of PIN diodes are used for controlling. The beam width tuning range can be tuned by the position of two slots on the C-shape strip. This antenna is working at 2.6 GHz with overlap 10-dB band width of 4.8%. The 3-dB EPBW of the three modes are 77.6°, 90.7° and 168.3°. The antenna has low profile and simple structure for fabrication. The simulation shows good results of impedance matching and radiating.