NDLI: Planar two-bit phase encoded transpolarising reflector using textured surface technology

Content Provider	IEEE Xplore Digital Library
Author	Fusco, V. Munir, A. Euler, M.
Copyright Year	2009
Description	Author affiliation: The Institute of Electronics Communications and IT, Queens University of Belfast, Queens Rd, Queens Island, BT3 9DT, N Ireland (Fusco, V.; Munir, A.; Euler, M.)
Abstract	We show that a suitably designed textured surface can be employed as a quadrature phase-shift keying (QPSK) backs-cattering reflector and as an electronically agile transpolarising reflector. The structure takes the form of an artificial magnetic conductor (AMC) that is printed on a Taconic CER10 substrate loaded with microwave varactor diodes incorporated onto the surface of the textured surface. It is shown that by adjusting the surface capacitance to each of four possible different states the proposed structure can generate four different phases of reflected signals thereby making the structure useful as a PSK backscattering reflector. In addition the structure is capable of encoding orthogonal TE and TM incident E-fields with up to eight independent PSK states. Simulation reveals that for the surface simulated at 2.88GHz the maximum expected reflection loss is only 0.36dB, and maximum QPSK phase error is 30. We also show that for this structure that we can synthesise two linearly polarised slant 45° signals, hence use the surface as a planar twist reflector. In addition we can use the surface to transform a slant linearly polarised 45° signal into either a right or a left hand circularly polarised reflected signals that itself can be digitally phase encoded with one of the four phase states, 0° , 90°, 180 °, 270 °. For the circularly polarised case the worst case axial ratio expected is 0.3dB along boresight.
Starting Page	1386
Ending Page	1389
File Size	251810
Page Count	4
File Format	PDF
ISBN	9781424447534
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-23
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	VDE
Subject Keyword	Varactors Polarization Phase shift keying Conductors Capacitance Signal generators Surface texture Diodes Quadrature phase shift keying Backscatter
Content Type	Text
Resource Type	Article

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