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Universal Equivalent Circuits for All Antennas

January 19 @ 6:30 pm - 9:00 pm

Please note the change of date. Wednesday January 19. Sorry for any inconvenience. If you have already registered for the original date, your registration will be transferred to the new date. Co-sponsored by: Antenna and Propagation Society, A/PS and Microwave Theory and Technology Society, MTTS Speaker(s): Stephen D. Stearns, Agenda: Abstract: Series and parallel RLC resonant circuits have long been the staple equivalent circuits for dipole and loop antennas despite being narrowband approximations. This paper shows how to make universal equivalent circuits for any antenna over any bandwidth. Part 1 introduces the history of classical electric network synthesis and Smith charts and reviews antenna impedance and admittance properties. Part 2 explains the modes of vibration of continuous structures, natural frequencies, feedpoint current, and impedance resonances. The impedance function of any antenna can be accurately modeled by two of four universal equivalent circuits given computed or measured impedance data and a circuit optimizer. Examples of broadband universal equivalent circuits are shown for dipole, circular loop, and discone antennas over multi-octave and decade bandwidths. Broadband equivalent circuits are useful for interpolating between data points and performing lab tests without radiating. 1-port equivalent circuits are useful for making dummy loads for reflection experiments or match network testing. 2-port equivalent circuits are useful for transmission measurements. Virtual: https://events.vtools.ieee.org/m/299566


January 19
6:30 pm - 9:00 pm
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