TY - JOUR N2 - Structures and characteristics ofwideband small-size phase shiftersmade with the use of single parallel stubs are presented in this paper. The stubs can be short-circuited or open-circuited on termination. Such devices arewell known, but are primarily used as components of filters ormatching circuits. The novelty, then, comes from the establishment of simple, but helpful formulae, which enable to describe the insertion phase shift and differential phase shift of a line with short and open stubs connected in parallel. These equations can be very useful for designing complex microwave multi-ports. The results of simulations and measurements of the devices, which were designed and made, are shown herein. It was also proved that the presented devices have several usable operating frequency sub-bands, and that the differential phase shift values in the higher sub-bands are greater than those in the lower operating frequency ranges. Thanks to this, the described phase shifters can be used in more than one frequency sub-band. It was stated that in the conditions under analysis, larger phase shifts can be achieved using open-circuited stubs rather than short-circuited stubs. However, the phase shifters with shorted parallel stubs can operate in a wider frequency band. L1 - http://www.czasopisma.pan.pl/Content/115043/PDF/07_MMS_1_2020.pdf L2 - http://www.czasopisma.pan.pl/Content/115043 PY - 2020 IS - No 1 EP - 102 DO - 10.24425/mms.2020.131712 KW - phase shift KW - differential phase shift KW - microwave phase shifter KW - parallel stub KW - instantaneous frequency measurement KW - IFM A1 - Rutkowski, Adam PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 27 DA - 2020.03.18 T1 - Single parallel stubs as broadband microwave phase shifters SP - 91 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/115043 T2 - Metrology and Measurement Systems ER -