In this paper, a tunable coplanar waveguide (CPW) line using the bismuth zinc niobate (BZN) thin film has been proposed and demonstrated for low-voltage phase shifter applications. In order to reduce the operation bias voltage the air gaps between the signal strip and ground plane are filled with the tunable thin films. At low E-fields of 1.3 kV/cm, the fabricated CPW line shows the phase difference of 10 degree at 10 GHz.
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13. Lee, Y.-L., H.-S. Youn, C. Tanaka, W. Kim, and M. Iskander, "Design, development and experimental verification of voltage tunable ferroelectric coplanar phase shifters," IEEE Antennas and Propagation Society International Symposium (APSURSI), 1-4, 2010.
14. Hwang, S.-H., T. Jang, Y.-S. Bang, J.-M. Kim, Y.-K. Kim, S. Lim, and C.-W. Baek, "Tunable composite right/left-handed transmission line with positive/negative phase tunability using integrated MEMS switches," IEEE International Conference on Micro Electro Mechanical Systems (MEMS), 763-766, 2010.
doi:10.1109/MEMSYS.2010.5442296
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