Analysis and measurement of hard-horn feeds for the excitation of quasi-optical amplifiers

Ali, M.A.; Ortiz, S.; Ivanov, Tony; Mortazawi, Amir

doi:10.1109/22.754882

Cited by 42 publications

(5 citation statements)

References 12 publications

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“…The periodic arrays of this type may be considered as FSS structures and can be easily characterized using the method described in [11]. The measurement setup consists of an Agilent 8510C vector network analyzer and two hard horns [22], which act as transitions between the coaxial input/output and planar wavefronts. A free-space thru-reflect-line (TRL) calibration and time gating are applied to eliminate the effects of cables, connectors, and hard horns and the residual errors of the higher order modes.…”

Section: Measurement Resultsmentioning

confidence: 99%

Study of 2-bit Antenna–Filter–Antenna Elements for Reconfigurable Millimeter-Wave Lens Arrays

Cheng

Abbaspour-Tamijani

2006

IEEE Trans. Microwave Theory Techn.

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This paper presents a new reconfigurable antenna-filter-antenna (AFA) element based on slot antennas and switchable resonators. This reconfigurable AFA can operate in four modes of operation as a three-or four-pole filter, and yields a 2-bit variable phase delay. As a result, the multimode AFA can be used as the building block of 2-bit adaptive lens arrays. This paper details design, modeling, and miniaturization of the reconfigurable AFA, and demonstrates its performance through preconfigured prototypes. The proposed AFA has a loss of 1.4-1.6 dB measured at 32 GHz in both three-and four-pole filter modes, and exhibits a frequency response that is almost insensitive to the angle of incidence. Several proof-of-concept fixed lens arrays have been also fabricated for output beams scanned to 0 , 15 , 30 , 45 , and 60 in the -and -plane. The measurement results show that the output beam can be scanned to 60 in both principle planes, with a worst case sidelobe level of less than 11 dB and a scan loss that hardly exceeds the theoretical limit.Index Terms-Antenna-filter-antennas, beam steering, frequency-selective surface (FSS), microelectromechanical systems (MEMS) antennas, phase shifters, reconfigurable antennas.

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Section: Measurement Resultsmentioning

confidence: 99%

Study of 2-bit Antenna–Filter–Antenna Elements for Reconfigurable Millimeter-Wave Lens Arrays

Cheng

Abbaspour-Tamijani

2006

IEEE Trans. Microwave Theory Techn.

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“…The measurement setup (Fig. 3) consists of two phasecorrected hard-horn antennas [3] and a vector analyzer. The hard-horns are used as transitions between the coaxial input/output ports and the free-space region, where the sample is placed.…”

Section: Resultsmentioning

confidence: 99%

Low-loss bandpass antenna-filter-antenna arrays for applications in quasi-optical systems

Abbaspour-Tamijani

Rebeiz

2005

2005 European Microwave Conference

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__ A new type of 3-pole frequency selective surface (FSS) is proposed as a low-loss bandpass filter for Quasi-Optical applications. This FSS is realized as a uniform array of antenna-filter-antenna (AFA) elements. Each AFA element is a three layer structure consisting two slot antennas and a stripline resonator. A Chebyshev bandpass AFA with 9.5% bandwidth was designed for 32 GHz and fabricated on two layers of Teflon substrates ( r =2.2, tan =0.0009). The maximum measured in-band insertion loss for this design is <0.5 dB, which is limited by the in-band ripple of the Chebyshev response.

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“…A hard horn can be employed to provide a uniform field distribution across the horn aperture. Hard electromagnetic walls [11] in the oversized waveguide can be implemented by loading the waveguide narrow walls with dielectric material. The X-band hard horn with length of 18 cm can be created by loading dielectric meterials along its two H-plane walls.…”

Section: Mg-lg Boundarymentioning

confidence: 99%

Analysis and Design of Wideband Dielectric Resonator Antenna Arrays for Waveguide-Based Spatial Power Combining

Zhang

Kishk

Yakovlev

et al. 2006

2006 European Microwave Conference

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Analysis and design of a probe-fed embedded dielectric resonator antenna (DRA) array in an oversized dielectric loaded waveguide with hard horn excitation are presented for its use in a waveguide-based spatial power combining system.Matching bandwidth as much as 15% (based on -1OdB return loss level) is achieved in the proposed design. The FiniteDifference Time-Domain (FDTD) approach with region-by-region discretization and subgridding schemes is applied for the analysis of the entire spatial power combining system. Numerical results of the scattering parameters for the example of a 3 x 3 embedded DRA array excited by a hard horn are compared with those obtained using the commercial software HFSS and exhibit very good agreement. A parametric analysis is performed in order to optimize the system for scattering and coupling characteristics.Oversized waveguide

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Analysis and measurement of hard-horn feeds for the excitation of quasi-optical amplifiers

Cited by 42 publications

References 12 publications

Study of 2-bit Antenna–Filter–Antenna Elements for Reconfigurable Millimeter-Wave Lens Arrays

Study of 2-bit Antenna–Filter–Antenna Elements for Reconfigurable Millimeter-Wave Lens Arrays

Low-loss bandpass antenna-filter-antenna arrays for applications in quasi-optical systems

Analysis and Design of Wideband Dielectric Resonator Antenna Arrays for Waveguide-Based Spatial Power Combining

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