Title :
Tunable Frequency Selective Surface based on ferroelectric ceramics for beam steering antennas
Author :
Roig, María ; Sazegar, Mohsen ; Zheng, Yuliang ; Jakoby, Rolf
Author_Institution :
Inst. of Microwave Eng. & Photonics, Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
A Tunable Frequency Selective Surface (FSS) as a transmission array with beam steering capability is presented. A FSS is implemented on screen printed Barium-Strontium-Titanate (BST) thick film ceramic. The FSS is designed to behave as a band pass filter and is made tunable by loading with a BST layer, which is placed beneath the metallic structures. The tunable FSS (TFFS) is simulated for different permittivities of the BST film which results in a shift in the filter response and therefore, a phase change in the wave. In the measurement of a prototype, a maximum phase shift of 116 degrees is obtained at 10 GHz, while transmission and reflection levels are kept invariable.
Keywords :
antennas; band-pass filters; beam steering; ferroelectric ceramics; frequency selective surfaces; phase shifters; thick film devices; BST film; BST layer; BST thick film ceramic; band pass filter; beam steering antenna; beam steering capability; ferroelectric ceramics; filter response; frequency 10 GHz; metallic structure; phase change; phase shift; reflection level; screen printed barium-strontium-titanate thick film ceramic; transmission array; transmission level; tunable FSS; tunable frequency selective surface; Antenna feeds; Arrays; Frequency selective surfaces; Microwave circuits; Resonant frequency; Substrates; Voltage measurement; BST; FSS; ferroelectrics; frequency selective surface; lens; phase shifters; phased array; transmission;
Conference_Titel :
Microwave Conference (GeMiC), 2012 The 7th German
Conference_Location :
Ilmenau
Print_ISBN :
978-1-4577-2096-3
Electronic_ISBN :
978-3-9812668-4-9
