Research Focus
| Our work in applied EM frequently involves the design and modeling of antennas or other electromagnetic structures for microwave circuits. Since our research is mostly focused on design optimization for new architectures, this has meant that we are frequently faced with new devices with unique modeling challenges. This EM modeling occasionally develops into a full-fledged research project. For example, our work in spatial combiners led us to develop a novel broadband planar multi-slot antenna, and we developed our own FDTD codes (a novelty at the time) to explore this antenna structure for active array applications. Currently our interests include other broadband planar antenna operating in waveguide environments, and modeling electromagnetic effects in coplanar waveguide circuits. |
Project Descriptions
 | Folded-Slot and Multiple-Slot Planar Antennas |
| FDTD analysis |
| Patch Coupled Amplifier Cell |
| Folded Slot Amplifier |
| Radiatively Coupled Oscillator Arrays |
| Scanning Measurements |
References
|
M.E. MacDonald, A. Alexanian, R.A. York, Z. Popovic and E.N. Grossman, "Spectral Transmittance of Lossy Printed Resonant-Grid Terahertz Bandpass Filters", IEEE Trans. Microwave Theory Tech., vol. 48, no. 4, pp. 712-718, April 2000. |
|
A. Nagra and R.A. York, "FDTD analysis of wave propagation in nonlinear absorbing and gain media", IEEE Trans. Antennas & Prop. , vol. 36, pp. 334-340, March 1998. |
|
A.
Alexanian, N.J. Kolias, R.C. Compton, and R.A. York, “Three
dimensional FDTD analysis of quasi-optical arrays using floquet boundary
conditions and Berenger's PML”, IEEE
Microwave Guided Wave Lett. , vol. 6, no. 3, pp. 138-140, March 1996. |
|
H.-S.
Tsai and R.A. York, “FDTD
analysis of folded-slot and multiple slot antennas on thin substrates”,
IEEE
Trans. Antennas & Prop. , vol. AP-44, pp. 217-226, Feb 1996. |
|
H.-S. Tsai and R.A. York, “Multi-slot 50Ohm antennas for quasi-optical circuits”, IEEE Microwave Guided Wave Lett. , vol. 5, no. 6, pp. 180–182, June 1995. |
|
P.
J. Stenius and R.A. York, “On the propagation of transients in waveguide”,
IEEE
Antennas and Propagation Magazine , vol. 37, pp. 39–44, April 1995. |
|
R.J. Ram, D.I. Babic, J.E. Bowers, R.A. York, “Spontaneous emission in microcavities with distributed mirrors”, IEEE J. Quantum Elec. , vol. 31, pp. 399-410, Feb 1995. |
|
R.J.
Ram and R.A. York, “Parametric
oscillation in nonlinear dipole arrays”, IEEE
Trans. Antennas & Prop. , vol. AP-42, pp. 406–411, March 1994. |
Related Work