Abstract
An electronically reconfigurable phase shifter using two Schiffman sections is performed for beam steering applications in Ku band. The proposed phase shifter consists of only two cascaded coupled-line sections with the reference line removed. This circuit is loaded by varactor diodes that ensure its tunability over a wide bandwidth. By supplying these varactor diodes with suitable bias voltages, a phase shift is continuously adjusted and reached up to 168° at 12.7 GHz with low insertion losses according to the simulations. Thus, the proposed two-stage phase shifter is able to reach a beam steering angle of 28.6° at 12.7 GHz with only one control voltage. The proposed structure exhibits that our phase shifter has a compact size and a large phase shifting range throughout the Ku band. The tunable phase shifter is prototyped and the measurement results are presented.
Highlights
Differential phase shifters are frequently exploited in communication systems such as phased array antennas and microwave control devices
One bias line is connected to the phase shifter where the voltages are applied to polarize the six varactor diodes
The insertion loss reaches the maximum value of -0.57 dB while the voltages exceed 4 V along the Ku band in accordance with Fig. 3(b)
Summary
Differential phase shifters are frequently exploited in communication systems such as phased array antennas and microwave control devices This appliance is made of main and reference lines which produce a constant differential phase shift between them [1,2,3]. One of the most appealing types of differential phase shifters is the Schiffman structure [4,5,6,7,8] due to its simple topology and wideband characteristic.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Advanced Computer Science and Applications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
