CST – Computer Simulation Technology

A Compact Multi-Frequency, High Power Radiating System Combining Dual-Band, Electrically Small Magnetic EZ Antennas and Multi-Frequency Standing Wave Oscillator Sources
Eric S. Ramon, J. Scott Tyo,Richard W. Ziolkowski, Michael C. Skipper, Michael D. Abdalla, Joshua M. Martin, Larry L. Altgilbers
VOL. 62, NO. 6, JUNE 2014
pp 3281 - 3289
Electrically small antennas, high power microwave generation, mesoband sources, multifrequency antennas
High power microwave (HPM) sources are typically bulky and massive in order to be able to radiate the extremely high source powers with a good impedance match and low losses. For this reason, it is sometimes difficult to incorporate an HPM antenna onto a desired platform when the available space is small. In previous work, we have adapted an electrically small EZ antenna to operate with a mesoband, quarter-wave oscillator source. The EZ antenna operates over a ground plane, but is conformal and low profile in that the electrical size is on the order of ?/12, making it attractive for applications where there is sufficient internal space to place a full source, but only limited space outside the platform for the radiating subsystem. Here we extend the capabilities of the oscillator/EZ antenna combination by introducing a dual band design for the antenna and altering the oscillator to produce multiple resonant frequencies. Designs are shown here that operate in the UHF (500-800 MHz) and L-band (1.5-1.8 GHz), but the operation frequencies are essentially arbitrary. This paper shows modeling results that predict high antenna efficiency with electrical sizes of at Ka <; f = 500 MHz.

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