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FREQUENCY-TUNABLE PHASE INVERTER BASED ON SLOT-LINE RESONATOR
Progress In Electromagnetics Research Letters
This paper describes a frequency-tunable phase inverter based on a slot-line resonator for the first time. The control circuit is designed and located on the defected ground. None of dc block capacitors are needed in the microstrip line. A wide tuning frequency range is accomplished by the use of the slot-line resonator with two varactors and a single control voltage. A 180-degree phase inverter is achieved by means of reversing electric field with two metallic via holes connecting thedoi:10.2528/pierl16110403 fatcat:tle4cwlmhjdhlghrny3de76oci