Abstract
Very small size Ka-band two-bit and K-band six-bit capacitive DMTL phase shifters are designed, calculated and simulated using a new approach. It is done based on information in the return loss diagram. The equations related to the resonance frequencies in the return loss diagram are extracted from the input impedance poles. It is due to the same resonance frequencies of return loss and input impedance diagrams in the linear region. Around these resonance frequencies, it is possible to have a high phase shift and small size together with acceptable return loss. The total proposed two and six-bit phase shifters length are 1.8 mm and 5 mm, respectively. These lengths are the smallest size among the two and six-bit capacitive DMTL phase shifters till now. Moreover, cantilever beam switches with low actuation voltage are used in two-bit phase shifter due to their compatibility with the integrated circuits. The equations-based calculated results are again calculated and simulated in MATLAB and HFSS softwares, respectively.
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Afrang, O.R., Afrang, S. & Hamzah, A.A. Very small size capacitive DMTL phase shifters using a new approach. Microsyst Technol 28, 2107–2122 (2022). https://doi.org/10.1007/s00542-022-05354-0
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DOI: https://doi.org/10.1007/s00542-022-05354-0