Wave-front adaptive control structure (WACS) for quasi-optical power amplifiers in Intelligent RF front-ends

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...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2004-09, Vol.14 (9), p.404-406
Main Authors: Hao Xin, Hacker, J.B., Sailer, A., Nagy, G., Higgins, J.A., Pilz, D., Rosker, M.J.
Format: Article
Language:English
Subjects:
Adaptive control
Amplifiers
Applied sciences
Circuit properties
Crystals
Design. Technologies. Operation analysis. Testing
Diodes
Electric, optical and optoelectronic circuits
Electromagnetic scattering
Electromagnetic waveguides
Electronic circuits
Electronics
Exact sciences and technology
Indium phosphide
Indium phosphides
Integrated circuits
Integrated optics. Optical fibers and wave guides
Intelligent structures
Microwaves
Optical and optoelectronic circuits
Power amplifiers
Radio frequencies
Radio frequency
Radiofrequency amplifiers
Real time
Rectangular waveguides
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Simulation
Surface waves
Waveguides
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Description
Summary: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.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2004.832053