Beam switching reflectarray using RF MEMS technology

Beam switching reflectarray with rf mems technology Bayraktar, Ömer; Aydın Çivi, Hatice Özlem; Department of Electrical and Electronics Engineering (2007) In this thesis 10x10 reconfigurable reflectarray is designed at 26.5 GHz where the change in the progressive phase shift between elements is obtained with RF MEMS switches in the transmission lines of unit elements composed of aperture coupled microstrip patch antenna (ACMPA). The reflectarray is illuminated by a horn antenna, and the reflected beam is designed to switch between broadside and 40° by considering the position of the horn antenna with respect to the reflectarray. In the design, the transmissio...
Beam Switching Reflectarray with MEMS Controls Bayraktar, Omer; Aydın Çivi, Hatice Özlem; Akın, Tayfun (2010-04-16) This paper presents a 26.5 GHz beam switching reflectarray monolithically fabricated on glass substrate with the RF MEMS switches. The array is formed using 10x10 aperture coupled microstrip patch antenna (ACMPA) elements. RF MEMS switches are implemented on the transmission lines in order to sustain the beam switching. A prototype of a reflectarray with 90 RF MEMS switches is monolithically produced using an in-house surface micromachining process including the wafer bonding steps. The measurement result s...
Beam Switching Reflectarray Monolithically Integrated With RF MEMS Switches Bayraktar, Omer; Aydın Çivi, Hatice Özlem; Akın, Tayfun (2012-02-01) 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 x 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...
Beam modulation in double gap virtual cathode oscillator Küçük, İbrahim Semih; Demir, Şimşek; Department of Electrical and Electronics Engineering (2018) Vircator is a promising high power microwave device when its simplicity, frequency tunability, lack of external magnetic field source are considered. Vircator gains importance especially susceptibility testing to electromagnetic pulses of electronic equipments with its tunability. Apart from advantages, main bottleneck of the vircator is its low efficiency. Tunability and efficiency enhancement studies are still continued in literature. Double gap vircator draws attention due to its tunability, generation f...
Beam test results from a fine-sampling quartz fiber calorimeter for electron, photon and hadron detection Akchurin, N; et. al. (1997-11-11) We present the results of beam tests with high-energy (8-375 GeV) electrons, pions, protons and muons of a sampling calorimeter based on the detection of Cherenkov light produced by shower particles. The detector, a prototype for the very forward calorimeters in the CMS experiment, consists of thin quartz fibers embedded in a copper matrix. Results are given on the light yield of this device, on its energy resolution for electron and hadron detection, and on the signal uniformity and linearity. The signal g...

Citation Formats

O. Bayraktar, K. Topalli, M. Unlu, O. A. Civi, Ş. Demir, and T. Akın, “Beam switching reflectarray using RF MEMS technology,” 2007, vol. 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37556.