Electrical engineering

Physics

Fabrication

Pathology

Bandwidth (computing)

Wideband

Optics

Engineering

Reconfigurable antenna

Antenna efficiency

Microstrip antenna

Antenna (radio)

Materials science

Alternative medicine

PIN diode

Diode

Optoelectronics

Medicine

Telecommunications

IEEE Antennas and Wireless Propagation Letters

In this letter, a wideband 1 bit 12 × 12 reconfigurable beam-scanning reflectarray is designed, fabricated, and measured. The 1 bit reconfigurable element is realized by soldering PIN diode into a slotted metallic square patch. To enhance the bandwidth of 1 bit reconfigurable reflectarray, we choose the central frequency at 5.0 GHz whose phase shift is 200° where the maximum phase shift occurs. Phase difference within 180° ± 20° is realized from 4.7 to 5.3 GHz. Utilizing this wideband element, the 12 × 12 reconfigurable reflectarray antenna is fabricated and measured. A control board that can display phase shift distributions in real time is designed to regulate all PIN diodes independently. Experimental results show that beam scanning within ±50° can be achieved both in xoz and yoz plane at 5.0 GHz. Also, the measured results present that -1 dB gain bandwidth is 8.4% from 4.85 to 5.275 GHz.

A Wideband 1 bit 12 × 12 Reconfigurable Beam-Scanning Reflectarray: Design, Fabrication, and Measurement