Abstract-In this work, a millimeter wave microstrip frequency-mixer design based on graphene is presented. The desired frequency mixing behavior is obtained using a nonlinear component consisting in a microstrip line gap covered by a graphene layer. The circuit includes microstrip filters that have been designed to obtain a high isolation between the input and output ports. The nonlinear behavior of the frequency mixer has been experimentally evaluated in the 38.6-40 GHz input signal frequency range, for different values of the input power and local oscillator power.

The problem of ensuring that there is enough generation capacity to meet future demand has been an issue in market design since the beginning of the deregulation process. Although ideally the market itself should be enough to provide adequate investment incentives, there are several factors that prevent this result from being achieved, and some actual markets have already experienced problems related with a lack of generation capacity. A regulatory framework to address this question is presented. The procedure is based on an organized market where reliability contracts (based on financial call options) are auctioned, so both their price and their allocation among the different plants are determined through competitive mechanisms. This results in a stabilization of the income of the generators and provides a clear incentive for new generation investment, with a minimum of regulatory intervention. Additionally, the method represents a market-compatible mechanism to hedge demand from the occurrence of high market prices.Index Terms-Capacity markets, capacity payments, electricity markets, generation adequacy, long-term guarantee of supply, wholesale market design.

A novel fully textile-integrated antenna based on a slotted short-circuited microstrip line has been designed, manufactured and experimentally validated for its use in automobile upholsteries for dedicated short-range communications. The antenna can be manufactured using an industrial loom and a laser prototyping machine, avoiding subsequent treatments, sewing procedures or coatings. The manufactured antenna presents a central working frequency of 5.9 GHz and a 9.3% bandwith. Good agreement between simulations and measurements has been achieved.

Two millimetre-wave textile integrated waveguides, which only differ in the employed substrate, have been designed, manufactured and experimentally characterized. Both waveguides have been conceived to be based on the conventional substrate integrated waveguide technology while being fully integrated in textile. The manufactured prototypes have been characterized by using a back to back textile integrated waveguide to rectangular waveguide transition. The theoretically predicted behaviour of the prototypes has been experimentally verified.

Abstract-In this work, a sub-millimeter wave frequency scanning 8 × 1 element antenna array is presented for its use in a terahertz imaging system operating in the 220-330 GHz frequency band. The antenna array is formed by eight open ended waveguides, a phaseshifting network implemented with WR-3 rectangular waveguides and a power divider. Dielectric rods are used to improve the radiation patterns at large beam-steering angles. Prototypes of antenna arrays with and without the dielectric rods have been manufactured and experimentally characterized. A beam-steering range greater than 40 • has been obtained for a frequency sweep between 270 GHz and 330 GHz.