Equivalent-circuit models for efficient transmission and dispersion analyses of multi-state periodic structures
- Publisher:
- EMW PUBLISHING
- Publication Type:
- Journal Article
- Citation:
- Progress in Electromagnetics Research, 2015, 153, pp. 93-102
- Issue Date:
- 2015-01-01
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 07.15070801.pdf | Accepted version | 185.73 kB |
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An equivalent-circuit model for a reconfigurable unit cell is proposed. This circuit model facilitates fast prediction of scattering parameters and dispersion analyses of a reconfigurable periodic structure. The cutoff frequencies obtained using equivalent-circuit models are in excellent agreement with those from measurements and full-wave numerical simulations. The proposed circuit model is then modified to include non-ideal, commercial RF FET switches. The effect of such a switch in each state, On or Off, is modeled by a frequency-dependant impedance, derived from the scattering parameters of the switch. The proposed technique can be used to analyze a reconfigurable periodic structure with any type of switches. For the structure with 24 unit cells considered here, the equivalent circuit model is about five orders of magnitude faster than full-wave simulations.
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