A High-Voltage Cable-Fed Impulse Radiating Antenna

  • Everett G. Farr
  • Leland H. Bowen
  • William D. Prather

We describe here a high-voltage cable-fed Impulse Radiating Antenna (IRA) that was developed as part of an Ultra-Wideband (UWB) radar system using a single antenna and a directional coupler [1]. In this configuration, it is not possible to use a sharpening switch at the apex to handle high voltages, so we investigated using higher voltages on a standard IRA with splitter balun. The resulting antenna, referred to as the IRA-6, was built and tested at three different voltage levels. Note that a more complete version of this paper appeared in [2]

This antenna is intended to be operated with a pulser with 30 kV peak voltage, 150 ps risetime, 3 ns pulse duration (at 1/e of peak), and 1 kHz maximum pulse repetition frequency (PRF) (manufacturer’s specs.). To prevent flashover at this voltage level, we incorporated a number of compromises into the antenna design at the splitter and feed point (focus), which led to somewhat larger reflections in the TDR than we are accustomed to seeing. These compromises also led to reduced realized gain, especially at higher frequencies. Nevertheless, the IRA-6 performed quite well as high as 4 GHz, which met the requirements for the radar system under study.


Ground Plane Directional Coupler Cable Length Center Conductor Feed Point 
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8. References

  1. 1.
    L. M. Atchley, E. G. Farr, D. E. Ellibee, and D. I. Lawry, “A High-Voltage UWB Coupled-Line Directional Coupler,” Sensor and Simulation Note 489, April 2004.Google Scholar
  2. 2.
    L. H. Bowen, E. G. Farr, and W. D. Prather, A High-Voltage Cable-Fed Impulse Radiating Antenna, Sensor and Simulation Note 507, December 2005.Google Scholar
  3. 3.
    L. H. Bowen, E. G. Farr, et al, Results of Optimization Experiments on a Solid Reflector IRA, Sensor and Simulation Note 463, January 2002.Google Scholar
  4. 4.
    L. H. Bowen, E. G. Farr, C. E. Baum, and W. D. Prather, “Experimental Results of Optimizing the Location of Feed Arms in a Collapsible IRA and a Solid IRA,” Sensor and Simulation Note 450, November 2000.Google Scholar
  5. 5.
    E. G. Farr and L. H. Bowen, “The Relationship Between Feed Arm Position and Input Impedance in Reflector Impulse Radiating Antennas,” Sensor and Simulation Note 499, April 2005.Google Scholar
  6. 6.
    L. M. Atchley, E. G. Farr, et al, “Characterization of a Time Domain Antenna Range,” Sensor and Simulation Note 475, June 2003.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Everett G. Farr
    • 1
  • Leland H. Bowen
    • 1
  • William D. Prather
    • 2
  1. 1.Farr Research, Inc.AlbuquerqueUSA
  2. 2.AFRL/DEAlbuquerqueUSA

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