Title :
A novel ultrawideband microwave differential phase shifter
Author :
Minnaar, F.V. ; Coetzee, Jacob C. ; Joubert, Johan
Author_Institution :
Dept. of Electr. Eng., Pretoria Univ.
fDate :
8/1/1997 12:00:00 AM
Abstract :
Wideband microwave phase shifters are usually constructed using cascaded coupled-fine sections connected together at their far ends. By utilizing the unique frequency-independent quadrature property of symmetric couplers, a new class of phase shifter is proposed. The use of ultrawideband couplers in its realization results in a device which offers greater freedom with respect to bandwidth and ripple. The tendency of symmetrical networks to cancel small errors due to manufacturing tolerances is also exploited in order to improve its high-frequency performance
Keywords :
microwave phase shifters; strip line couplers; bandwidth; high-frequency performance; microwave differential phase shifter; ripple; symmetric couplers; ultrawideband phase shifter; Capacitance measurement; Data mining; Gallium arsenide; MESFETs; Microwave devices; Parasitic capacitance; Performance evaluation; Phase shifters; Shape measurement; Ultra wideband technology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
