Physics

Microstrip

Bandwidth (computing)

Ku band

Aperture (computer memory)

Optics

Coupling (piping)

Microstrip antenna

Antenna (radio)

Acoustics

Metallurgy

Materials science

Computer science

PIN diode

Diode

Transmission line

Optoelectronics

Telecommunications

IEEE Transactions on Antennas and Propagation

A novel 1-bit 256-element reconfigurable transmitarray antenna (RTA) at the Ku-band is presented. The element consists of two orthogonal H-shaped slots as receiving and transmitting structures, and the power transmission is realized by a coupling microstrip line in between. Two p-i-n diodes integrated on the coupling line can be electronically controlled to reverse the excitation directions, thus generating two states with 180° phase difference and low transmission loss. A subwavelength element spacing of λ 0 /3 is utilized to stabilize the element performance under oblique incidence. A transmitarray prototype with 16 × 16 elements and aperture size of 5.3λ 0 × 5.3λ 0 at 12.5 GHz is fabricated and measured for the experimental verification. The measured results show that the maximum gain is 17.0 dBi with an aperture efficiency of 14.0%, and 2-D scanning beams within ±50° angular range are obtained. The 3-dB gain bandwidth of the broadside beam is 9.6%.

Design and Measurement of a 1-bit Reconfigurable Transmitarray With Subwavelength H-Shaped Coupling Slot Elements