March 3, 2026Open Access

A 2‐ to 18‐GHz 6‐Bit Vector‐Sum Phase Shifter With Tunable Operating Band

Puntos clave

Achieves RMS phase error below 1.5° across the 2 to 18 GHz operating band, indicating high performance.
Employs a variable gain amplifier to enhance phase-shifting accuracy while maintaining low power consumption.
Demonstrates reconfigurability through the use of varactors, which replace fixed capacitors in the design.
Designed using 0.13-μm SiGe BiCMOS technology, illustrating modern fabrication techniques in RF applications.

Resumen

ABSTRACT This paper presents a novel 2‐ to 18‐GHz vector‐sum phase shifter (VSPS), fabricated in 0.13‐μm SiGe BiCMOS technology, that employs a reconfigurable polyphase filter (PPF). In the proposed design, the fixed capacitors in the PPF network are replaced with varactors, providing tunable characteristics while preserving phase accuracy. A high‐precision variable gain amplifier (VGA) in the final synthesis stage further improves the phase‐shifting accuracy. Measurements show an RMS phase error below 1.5° and an RMS gain error under 1.2 dB across the full 2‐ to 18‐GHz band. The phase shifter achieves a low power consumption of 105 mW at a 3.3‐V supply and occupies a compact area of 1240 × 860 μm 2 . Trial Registration: Not applicable. This work does not involve clinical trials

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