An X/Ku band phase shifter with filter compensation technology

This letter proposes an ultra-wideband switched T-type phase shifter, which covers the whole X/Ku band. The proposed shifter integrates a filter compensation structure, achieving flat relative shift in broadband, conventional one cannot acquire. In addition, designed can further reduce error and improve capability with greater than 45°. Employing architecture, 90° is fabricated 0.15-μm GaAs pHEMT process. measured results show that achieves stable at 8 to 18 GHz of less ±2°, insertion loss (IL) 2.4 4.2 dB. And chip size 0.62 × 0.75 mm2. Thanks its good performance, very suitable for various radar satellite communication systems.