Reconfigurable Multibeam Holographic Antenna Based on Liquid-Crystal Technology for Ka-Band LEO Satellite Application

Reconfigurable Multibeam Holographic Antenna Based on Liquid-Crystal Technology for Ka-Band LEO Satellite Application

Blog Article

The requirements of low Earth orbit (LEO) satellite systems for high-precision and selective multiple coverage, have driven much interest and demand for millimeter-wave multibeam antennas.However, the key challenge is to provide fully independent control of each beam with a single source, and metasurfaces have paved the way to solve this problem.Here, we present a reconfigurable multibeam Heat Transfers holographic antenna (HA) at 36 GHz.

In particular, we used liquid crystals (LC) to implement a low power consumption and lightweight antenna.Each unit cell is selectively driven by connected bias lines according to the calculated holographic pattern.Consequently, the proposed multibeam HA can radiate in the desired direction and control each beam independently.

Furthermore, the gain difference in each beam can be corrected by the amplitude coefficient to radiate with nearly equal gain in each direction.The proposed HA demonstrated the scanning range of 60° at 36 GHz, with a peak gain of 8.7 dBi.

Additionally, the peak directivity is 12.7 Toys Rope dBi, the 3-dB bandwidth is about 1 GHz at the center frequency of 36 GHz, and the operating bandwidth is 2.8 GHz ( $34.

8-37.6$ GHz).