Differential Sensing Based on Quasi-Microstrip Mode to Slot-Mode Conversion
Vélez Rasero, Paris (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Muñoz Enano, Jonathan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Martín, Ferran (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Data:	2019
Resum:	In this letter, a differential sensor and comparator based on a mode conversion detector implemented by means of a slotline resonator is proposed for the first time. The sensor divides the input signal between two identical sensing elements, a pair of microstrip lines loaded with complementary split-ring resonators (CSRRs). Such CSRRs are symmetrically etched in the ground plane at both sides of the slotline. Therefore, by truncating symmetry, e. g. , by loading one of the CSRRs with the reference (REF) sample and the other one with the sample under test (SUT), the slot mode is generated in the slotline resonator. The signal level associated with this mode, which can be inferred by means of a slotline/microstrip transition, depends on the level of asymmetry generated by CSRR loading. Consequently, the proposed structure is useful for differential sensing, where a single input and output port suffices to excite the sensor and to measure the output variable, the magnitude of the transmission coefficient.
Ajuts:	Ministerio de Ciencia e Innovación TEC2016-75650-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159 Ministerio de Ciencia e Innovación IJCI-2017-31339
Nota:	Altres ajuts: ICREA
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Complementary split-ring resonator (CSRR) ; Differential sensor ; Microstrip line ; Microwave sensor ; Mode conversion ; Slotline
Publicat a:	IEEE microwave and wireless components letters, Vol. 29, Issue 10 (October 2019) , p. 690-692, ISSN 1531-1309

DOI: 10.1109/LMWC.2019.2939533

Postprint 4 p, 631.6 KB

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