conditions of fundamental mode in the planar open ring resonators are studied.
Electrodynamic system is considered, which consists of planar interconnection
structure coupled with microstrip open ring resonator. Similar system was used
in previous works on frequency characterization of resonators and antennas by ac
Josephson effect in terahertz frequency range. Calculations are performed by
time domain finite difference method (TDFD). A real part of electrodynamic
structure admittance vs. frequency dependence ReY(f) calculated,
which is a key factor in Josephson spectroscopy. It is shown, that
interconnection structure by itself has flat ReY(f) dependence in
the frequency range of resonator fundamental mode excitation. When
interconnection structure interacts with the resonator, itís ReY(f)
dependence has a peculiarity, related to fundamental resonance mode excitation.
A form of the peculiarity depends on resonator layout. In particular ReY(f)
shows local maximum or minimum. Basing on equivalent circuit representation of
the resonator, these peculiarity forms can be considered by serial or parallel
resonance circuit at frequencies in the vicinity of resonance frequency. These
cases correspond to different resonator excitation conditions. Resonator
fundamental mode can be excited by electric or magnetic field, which depends on
the arrangement of resonator and interconnection structure.
Josephson junction, terahertz electronics.
L.-H., Chang K.. High-efficiency piezoelectric-transducer tuned feedback
microstrip ring-resonator oscillators operating at high resonant frequencies. IEEE
Trans. Microw. Theory Tech., 2003, Vol. 51, No 4, pp. 1141-1145.
J.S. Couplings of Microstrip Square Open-Loop Resonators for Cross-Coupled
Planar Microwave Filters. IEEE Trans. On Microwave Theory and Techniques, 1996,
Vol. 44, pp. 2099-2109.
A., Nwajana A. O., Yeo K.S.K. Filtered Power Splitter Using Square Open Loop
Resonators. Progress In Electromagnetics Research C, 2016, Vol. 64, pp.
T. F., Tsiapa I., Kostopoulos A., et al. Experimental demonstration of
negative magnetic permeability in the far-infrared frequency regime. Appl. Phys.
Lett., 2006, Vol. 89, p. 084103.
W. J., Taylor A. J., Highstrete C. et al. Dynamical Electric and Magnetic
Metamaterial Response at Terahertz Frequencies. Phys. Rev. Lett., 2006, Vol.96,
N., Koschny T., Kafesaki M., et al. Electric coupling to the magnetic resonance
of split ring resonators. Appl. Phys. Lett., 2004, Vol.84, pp. 2943-2945.
O.Yu., Gubankov V.N., Gundareva, I.I., et al. Josephson spectroscopy for local
diagnostics of planar resonator systems in the millimeter wave band. Journal of
Communications Technology and Electronics, 2015, Vol. 60 No 9, pp 1006-1010.
A., Pavlovskiy V., Gubankov V., et al. Frequency‐Selective Analysis Of THz
Photonic Elements By The Ac Josephson Effect. [41th International Conference on
Infrared, Millimeter and Terahertz Waves] September 25-30, 2016. Copenhagen,
O.Yu., Gubankov V.N., Gundareva, I.I., et al. Josephson admittance spectroscopy
of log-periodic antenna at the submillimeter wavelength range. Journal of
Communications Technology and Electronics. 2009. Vol. 54, No 11, pp. 1310-1314.
L.J., Carbonell J., Boria V.E. Study of equivalent circuits for open-ring and
split-ring resonators in coplanar waveguide technology. IET Microw. Antennas
Propag., 2007, Vol. 1, pp. 170-176.
D. M. Microwave Engineering. J. Wiley & Suns Inc., 2012.