Title :
Beam Switching Reflectarray Monolithically Integrated With RF MEMS Switches
Author :
Bayraktar, Omer ; Civi, Ozlem Aydin ; Akin, Tayfun
Author_Institution :
Dept. of Electr. & Electron. Eng., Middle East Tech. Univ., Ankara, Turkey
Abstract :
A reflectarray antenna monolithically integrated with 90 RF MEMS switches has been designed and fabricated to achieve switching of the main beam. Aperture coupled microstrip patch antenna (ACMPA) elements are used to form a 10 × 10 element reconfigurable reflectarray antenna operating at 26.5 GHz. The change in the progressive phase shift between the elements is obtained by adjusting the length of the open ended transmission lines in the elements with the RF MEMS switches. The reconfigurable reflectarray is monolithically fabricated with the RF MEMS switches in an area of 42.46 cm2 using an in-house surface micromachining and wafer bonding process. The measurement results show that the main beam can be switched between broadside and 40° in the H-plane at 26.5 GHz.
Keywords :
aperture-coupled antennas; micromachining; microstrip antenna arrays; microswitches; microwave antenna arrays; reflectarray antennas; transmission lines; ACMPA elements; RF MEMS switches; aperture coupled microstrip patch antenna; beam switching reflectarray; frequency 26.5 GHz; in-house surface micromachining; monolithic integration; open ended transmission lines; phase shift; reconfigurable reflectarray antenna; wafer bonding; Micromechanical devices; Microstrip; Microstrip antennas; Microswitches; Power transmission lines; Radio frequency; Reflection; Reflectarray antennas; micro-electro-mechanical systems (MEMS) switches; microstrip antennas; reconfigurable antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2173099
