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We have fiber-coupled an array of n-i-pn-i-p superlattice photomixers using a fiber array of same pitch of 145 $\mu \text{m}$ . We experimentally investigate the effect of the finite size of the implemented silicon lens on the interference between the array elements in the far field. We compare the results from a geometry optimized for a collimated terahertz (THz) beam to theory and simulations....
This manuscript proposes the combination of several photomixing THz sources for overcoming the power limitations of this technology. Each element is placed in the gap of a balanced antenna. All the elements conform a 2D rectangular array. For avoiding issues related to having out-of-focus sources when using one electrically large silicon lens, two different strategies are considered: increasing the...
In this paper we present 1Gb/s wireless data reception at different sub-THz carrier wave frequencies, using a single quasi-optic Schottky receiver module. The module employs a Log-Spiral broadband antenna patterned on silicon. In this paper we present the performances at carrier wave frequencies ranging from 90 GHz to 330 GHz, demonstrating for the first time the flexibility of the module as versatile...
A compact E-Band receiver based on a zero bias Schottky barrier diode, folded dipole antenna and hyperhemispherical silicon lens for wireless communications is presented. Zero bias Schottky diodes were designed and manufactured, and all their parameters were extracted. The folded dipole antenna is designed in such a way that maximum power is transferred from it to the Schottky diode, so the responsivity...
This paper presents a comparison of the most frequently used mobile commerce services according to the characteristics of the Killer Apps. After this, we focused the study on one of the mobile payment systems that offers more security for the purchase through mobile devices: mobile payment system based on 2D barcodes. A background study was made to evaluate the impact that m-commerce services can...
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