In this article, we propose a hybrid electromechanical scanning lens antenna array architecture suitable for the steering of highly directive beams at submillimeter wavelengths with field-of-views (FoV) ±25°. The concept relies on combining electronic phase shifting sparse mechanical translation array. use sparse-phased significantly simplifies RF front-end (number active components, routing, t...

This paper studies the relationship between moral hazard and the matching structure of teams. We show that team incentive problems may, on their own, generate monotone matching predictions in the absence of complementarities or anti-complementarities in production technology. We also derive sufficient conditions on the primitives of the model leading to the optimality of positive and negative m...

A central prediction of information economics is that market forces can lead businesses to voluntarily provide information about the quality of their products, yet little voluntary disclosure is observed in the field. In this paper, we demonstrate that the inconsistency between theory and reality is driven by a fundamental failure in consumer inferences when sellers withhold information. Using ...

In this letter, the design of a passive multibeam lens antenna is proposed for CubeSat space communication system as an alternative application 2-D microstrip array that has originally been designed 39-GHz 5G multi-user, multiple-input, multiple-output (MU-MIMO) system. The half-ellipsoid 3-D printed using stereolithography technology. prototype capable selecting main beam between 16 different ...

We describe measurements of the angular radiation patterns from lens-coupled terahertz antennas fabricated on photoconductive substrates. These measurements have been performed using a novel terahertz time-domain spectrometer in which the femtosecond optical pulses used to gate the emitter and receiver antennas are delivered via optical fiber. We have used this system to perform a comparison be...

We describe measurements of the angular radiation patterns from lens-coupled terahertz antennas fabricated on photoconductive substrates. These measurements were performed with a novel terahertz (THz) timedomain spectrometer in which the femtosecond optical pulses used to gate the emitter and receiver antennas were delivered by optical fiber. We used this system to perform a comparison between ...

A wideband high-gain circularly polarized (CP) shaped dielectric horn-lens antenna (SDHLA) operating in the frequency band between 6.7 and 18.2 GHz [fractional impedance bandwidth (FIBW) of 92.4%] with a 3-dB axial-ratio range from 8.1 to 16.3 (FARBW) 67.2%], is presented. The antenna, composed suitably horn, integrated super-ellipsoidal-axicon lens made out stacked thin disks, mounted on print...

In this article, we discuss the potential of radio frequency (RF) lens for ultra-wideband millimeter-wave (mmWave) systems. terms beam squint, compare proposed RF antenna with phase shifter-based array hybrid beamforming. To reduce complexities fully digital beamforming, researchers have come up lens-based The use mmWave systems, however, causes an increase in bandwidth, which gives rise to squ...

With the development of communication technology has come several measurement applications requiring plane-wave conditions for wireless-device characterizations in anechoic chambers. In this paper, a metasurface lens with 2 × feeding-antenna array is proposed and characterized to synthesize plane wave near field fifth-generation (5G) millimeter-wave radio-frequency (RF) devices test. The lens, ...