A 1.7–2.7-GHz 4-bit Phase shifter based on packaged RF MEMS switches

Yulin Huang, Xinyi Li, Jingfu Bao, Di Deng, Yiling Wang and Yijia Du

Journal of Electromagnetic Waves and Applications, 2016, vol. 30, issue 5, 553-565

Abstract: This study presents a 4-bit phase shifter with a maximum phase shift degree of 75° based on packaged metal-contact single-pole double-throw (SPDT) radio frequency microelectromechanical system (RF MEMS) switches mounted on a 20 mil RO4350 substrate and assembled with its driver module on a 4-layer printed circuit board (PCB) board. Electric length of 10° and characteristic impedance of 61.7 Ω are selected for T-stub matching. Standard PCB processing makes it easy to develop and suitable for taking place of mechanical tilt employed in recent base station. Measurements indicate a maximum insertion loss of 1.37 dB at 2.7 GHz and a minimum return loss of 11.71 dB. The phase accuracy is within 1.75° at 2.7 GHz.

Date: 2016
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DOI: 10.1080/09205071.2015.1090347

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