TY - JOUR
T1 - Wave-front adaptive control structure (WACS) for quasi-optical power amplifiers in intelligent RF front-ends
AU - Xin, Hao
AU - Hacker, J. B.
AU - Sailer, A.
AU - Nagy, G.
AU - Higgins, J. A.
AU - Pilz, D.
AU - Rosker, M. J.
N1 - Funding Information:
Manuscript received November 24, 2003; revised April 8, 2004. This work was supported by the U.S. Army Research Laboratory under Contract DAAD17-02-C-0096. The review of this letter was arranged by Associate Editor A. Stelzer. J. B. Hacker, A. Sailer, G. Nagy, and J. A. Higgins are with the Rockwell Scientific Company, Thousand Oaks, CA 91360 USA. H. Xin is with the Raytheon Company, Tucson, AZ 85734 USA (e-mail: [email protected]). D. Pilz is now with the European Aeronautic Defence and Space Company (EADS), Dresden 01101, Germany. M. J. Rosker is now with the Defense Advanced Research Projects Agency/Microsystems Technology Office (DARPA/MTO), Arlington, VA 22203 USA. Digital Object Identifier 10.1109/LMWC.2004.832053
PY - 2004/9
Y1 - 2004/9
N2 - Tunable electromagnetic crystal (EMXT) surfaces are used as rectangular waveguide sidewalls to provide uniform excitation for quasi-optical power amplifiers. InP hetero-barrier varactors are monolithically integrated into periodic metal-dielectric structures to realize a reconfigurable EMXT surface that has a tunable resonance frequency from 30 to 45 GHz. Real-time reconfigurable (30-40 GHz) and low-loss quasi-TEM wave-front control with only 2-mm long EMXT waveguide section is demonstrated. Experimental results are in good agreement with design simulations. Such waveguides can be readily integrated into an intelligent RF front-end with self-assessment and self-adjustment capabilities.
AB - Tunable electromagnetic crystal (EMXT) surfaces are used as rectangular waveguide sidewalls to provide uniform excitation for quasi-optical power amplifiers. InP hetero-barrier varactors are monolithically integrated into periodic metal-dielectric structures to realize a reconfigurable EMXT surface that has a tunable resonance frequency from 30 to 45 GHz. Real-time reconfigurable (30-40 GHz) and low-loss quasi-TEM wave-front control with only 2-mm long EMXT waveguide section is demonstrated. Experimental results are in good agreement with design simulations. Such waveguides can be readily integrated into an intelligent RF front-end with self-assessment and self-adjustment capabilities.
KW - Electromagnetic crystal (EMXT) surfaces
KW - Hetero-barrier varactors (HBV)
KW - Transverse electromagnetic (TEM)
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U2 - 10.1109/LMWC.2004.832053
DO - 10.1109/LMWC.2004.832053
M3 - Article
AN - SCOPUS:4444242341
SN - 1531-1309
VL - 14
SP - 404
EP - 406
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 9
ER -