研究目的
To present a low-power vector-sum phase shifter for upcoming 5G communication at 28 GHz, focusing on achieving low dc power and compact area at K-band and Ka-band.
研究成果
The proposed 28-GHz low-power phase shifter using current-reused technique demonstrates low dc power and compact area, with an average peak gain of ?3.75 dB at 29.25 GHz and total dc power consumption of only 6.6 mW. It shows good performance in terms of gain, phase shift, and power consumption among active phase shifters at K-band and Ka-band.
研究不足
The measured peak gain is moved from 28 to 29 GHz and dropped about 4 dB at peak gain due to the varying input impedance of the vector adder with the control voltage.
1：Experimental Design and Method Selection:
The phase shifter is designed using a 90° coupler and two re?ection-type biphase modulators for phase synthesis, with a current reused technique to connect the vector adder and output buffer.
2：Sample Selection and Data Sources:
The design is fabricated and measured, with performance metrics such as gain, phase shift, and power consumption evaluated.
3：List of Experimental Equipment and Materials:
Includes a 90° coupler, biphase modulators, and transistors for the vector adder and output buffer.
4：Experimental Procedures and Operational Workflow:
The phase shifter is tested using LabVIEW connected with NI USB-6009 DAQ to generate control voltages and digital signals for measurement.
5：Data Analysis Methods:
Performance is analyzed based on measured gain, phase shift, and power consumption, with comparisons to simulated results.
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