Characterization of Reconfigurable LC-Reflectarrays Using Near-Field Measurements

Dieter, Sabine; Moessinger, Alexander; Mueller, Stefan; Jakoby, Rolf; Menzel, Wolfgang

doi:10.1109/gemic.2009.4815846

Cited by 6 publications

(8 citation statements)

References 9 publications

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“…For an OERW feed, the calculated antenna gains for the equivalent current sources, point source, and CST MWS are 31.8, 30.0, and 31. 6 [dBi], respectively. Our precise and flexible formulations can be used to optimize a MOR antenna with wellknown metaheuristic optimization techniques.…”

Section: Discussionmentioning

confidence: 99%

“…A reflectarray antenna [1]- [6] is a viable candidate for the millimeter-wave applications. The reflectarray antenna has several advantages in the design of millimeter-wave high gain antennas.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In order to design better antenna gain, we need to model a feed, a reflectarray, or scatterers as precise as possible. To this end, the design procedures based on the near-field measurements were proposed in [5], [6].In this Work, we will use the surface equivalence principle to model the incident fields radiated from a feed. In view of the surface equivalence principle and the vector potential formulations, the surface current densities on feed apertures can be transformed into the electric and magnetic fields at any positions.…”

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confidence: 99%

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A metal-only reflectarray (MOR) antenna excited by equivalent surface current sources to model arbitrary feeds

Cho

Lim

Lee

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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A metal-only reflectarray (MOR) antenna for 77 [GHz] was analyzed with the equivalent surface current sources. The equivalent current sources can be used to produce the incident fields radiated from a feed. When a feed is an openended rectangular waveguide (OERW), the calculated antenna gains for the equivalent current sources, point source, and CST Microwave Studio (MWS) are 31.8, 30.0, and 31.6 [dBi], respectively. The simulated results of the equivalent current sources and CST MWS are in good agreement with each other in terms of the antenna gain.Index Terms-metal-only reflectarray, equivalent current source, surface equivalence principle, feed modeling. I. IntroductionA reflectarray antenna [1]-[6] is a viable candidate for the millimeter-wave applications. The reflectarray antenna has several advantages in the design of millimeter-wave high gain antennas. For instance, we can design the various radiation patterns by controlling the physical dimensions of each element in the reflectarray. Recently, a metalonly reflectarray (MOR) antenna [3], [4] was proposed for the millimeter-wave bands. Since a MOR antenna is only made of metal, the MOR does not have any dielectric loss. In addition, the MOR antenna has much less loss in the millimeter-wave due to the spatial feeding by a feed. However, the MOR antenna is bulky and heavy for the lower frequency bands below the millimeter-wave. In order to design better antenna gain, we need to model a feed, a reflectarray, or scatterers as precise as possible. To this end, the design procedures based on the near-field measurements were proposed in [5], [6].In this Work, we will use the surface equivalence principle to model the incident fields radiated from a feed. In view of the surface equivalence principle and the vector potential formulations, the surface current densities on feed apertures can be transformed into the electric and magnetic fields at any positions. Thus, the incident fields from a feed to the MOR antenna can be easily computed with the equivalent surface current sources to model the arbitrary feeds. Although modern commercial software tools can calculate a reflectary excited by arbitray feeds at the same time, the computational procedures based on the equivalent surface current sources enable us to design

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

A metal-only reflectarray (MOR) antenna excited by equivalent surface current sources to model arbitrary feeds

Cho

Lim

Lee

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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“…First investigations have been made around 35 GHz ( [13], [14]), now measurements are possible also in the 77 GHz frequency range. Fig.…”

Section: Characterization Methodsmentioning

confidence: 99%

Investigations of advanced folded reflectarray antennas

Dieter

Li²,

Keyrouz

et al. 2010

2010 International Conference on Electromagnetics in Advanced Applications

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− This paper reports on recent research on folded reflectarray antennas done at the University of Ulm. The first area of work deals with the investigations of reflector elements with improved phase angle range and the influence of different effects on bandwidth and antenna gain including cell type, size, or substrate layer structure. A second area of work is the precise characterization of reflector elements, both with respect to the phase angle as well as the polarization twisting. Two methods have been developed for such characterization at frequencies around 77 GHz, one based on a quasi-optical Gaussian beam setup, another one based on near-field probing.

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