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In electrical engineering, a circulator is a passive, non-reciprocal three- or four-port device that only allows a microwave or radio-frequency (RF) signal to exit through the port directly after the one it entered. Optical circulators have similar behavior. Ports are where an external waveguide or transmission line, such as a microstrip line or a coaxial cable, connects to the device. For a three-port circulator, a signal applied to port 1 only comes out of port 2; a signal applied to port 2 only comes out of port 3; a signal applied to port 3 only comes out of port 1. An ideal three-port circulator thus has the following scattering matrix:
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Rodica Ramer is a Romanian born Australian professor of microelectronics at the University of New South Wales, where she and her team work on the development of radio-frequency microelectronic technologies, advancing wireless communication technology. She earned a Ph.D from the University of Bucharest in solid-state physics in 1992. Prior to working at UNSW, she was a senior research scientist at the Microwave Laboratory, National Centre for Nuclear Energy of Romania, a research associate at the Superconductivity Laboratory, the University of Alabama, Tuscaloosa, and at the Microwave Laboratory, Colorado State University, Fort Collins. She is a fellow of the Electromagnetics Academy.
Arthur Aaron Oliner was an American physicist and electrical engineer, who was professor emeritus at department of electrical and computer engineering at New York University-Polytechnic. Best known for his contributions to engineering electromagnetics and antenna theory, he is regarded as a pioneer of leaky wave theory and leaky wave antennas.
References
- ↑ Birth year from WorldCat Identities, retrieved 2021-06-04
- ↑ Friedrich, Nancy (18 May 2011), "Women in Microwaves", Microwaves&RF, retrieved 2021-06-04
- ↑ Frastaci, Mona (1 May 1997), "Recognizing a penchant for invention", The Washington Post
- ↑ "Zaki, Kawthar", Faculty Directory, A. James Clark School of Engineering, University of Maryland, retrieved 2021-06-04
- ↑ The First Women of EECS, Berkeley EEECS, retrieved 2021-06-04
- ↑ IEEE Fellows directory, IEEE, retrieved 2021-06-04
- ↑ "Kawthar A. Zaki, FEMA", Who's Who in Electromagnetics, The Electromagnetics Academy, retrieved 2021-06-04