Abstract
In this paper, a new design of DMTL phase shifter is proposed using parallel LC circuits. The proposed design produces resonance peaks in the return loss curve. By creating two different resonance frequencies and impedances on the two sides of the desired frequency with a specific impedance, it is possible to obtain the desired phase shift and appropriate return loss. This research has two main aims, which are pursued by proposing two phase shifters. The first aim is to introduce a new method in the phase shifter. The results of the first proposed phase shifter prove the effectiveness of the new method. The second aim, which is based on the introduced new method, is to achieve a small size Ka-band 6-bit DMTL phase shifter. It is done by the second proposed phase shifter. The return loss and phase shift of both phase shifters are first calculated using two different computations for a unit cell at the desired frequency. Then, the curves of return loss and phase shift in terms of frequency are plotted using MATLAB for six independent bits and 64 states of the 6-bit DMTL phase shifter. Finally, the ADS software is used for both phase shifters to confirm the calculation results again and verify the curves plotted in MATLAB. The simplicity of the proposed structure allows the simple fabrication process in accordance with the standard MEMS-based fabrication processes. The length of the second phase shifter is 6.6 mm, which is the smallest among the 6-bit DMTL phase shifters presented so far.
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Data Availability
The datasets generated during the current study are available from the corresponding author on reasonable request.
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Afrang, O.R., Afrang, S. 6-Bit Ka-Band DMTL Phase Shifter Using Parallel LC Circuits. Circuits Syst Signal Process 42, 107–129 (2023). https://doi.org/10.1007/s00034-022-02150-z
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DOI: https://doi.org/10.1007/s00034-022-02150-z