Millimeter wave (MMW) VCO design is motivated by the need for the ever-increasing frequency and bandwidth of communication applications. Most previously reported W-band (75 to 110GHz) and D-band (110 to 170GHz) VCOs are realized in InP HEMT or HBT technology [1-3] due to excellent transistor performances. Recently, some millimeter-wave Si-based VCOs were reported with high power consumption [5-...

Millimeter wave radars have been developed and marketed for the purpose of reduction in deaths in traffic accidents and traffic congestion. However, the millimeter wave radars need to be cheaper to be used more widely. In order to make the radars cheaper, we developed a new MMIC (Monolithic Microwave IC) structure and bonding technology, focusing on reducing costs of RF-modules. This article de...

The Point to multipoint wireless distribution is the most effective and affordable modality to deliver data to a high number of terminals distributed randomly in a wide area. The use of high density small cells, mandatory to increase the throughput per users, maintaining terminals at sub-6 GHz frequency, needs capillary backhaul networks that fibers cannot effectively provide. The TWEETHER proj...

This paper formulates a simple matrix-based solution to estimate the voltage-dependent capacitance of a weakly nonlinear device at microwave and millimeter wave frequencies. Unlike other approaches, which rely on the direct capacitance measurement at different bias voltages, the proposed technique generates a large signal model for the capacitance directly from the frequency domain measurement ...

An analysis is presented for the conversion loss and noise of microwave and millimeter-wave mixers. The analysis includes the effects of nonlinear capacitance, arbitrary embedding impedances, nonideality of microwave diodes, and shot, thermal, and scattering noise generated in the diode. Correlation of downconvertd components of the time-varying shot noise is shown to explain the “anomalous” no...

The inherent restrictions of human body images acquired at visible spectrum hinder the performance of person recognition systems built using that kind of information (e.g. scene artifacts under varying illumination conditions). One promising approach for dealing with those limitations is using images acquired out of the visible spectrum. This paper reviews some of the existing human body imagin...

This paper reports on the optical generation of a rapidly tunable millimeter-wave subcarrier for lidar–radar. The millimeter-wave signal is generated by beating the output from two Nd : YVO4/MgO : LiNbO3 electrooptical monomode microchip laser sections realized monolithically in a single composite crystal. The device has a continuous tuning range up to 45 GHz. The measured chirp rate is 3816 TH...

The appropriateness of dielectric loaded antenna for the passive millimeter wave imaging application has recently been demonstrated. In this paper, we analyze the optical performance of the passive millimeter wave (PMMW) imaging system based on a 1D focal plane array (FPA) of dielectric rod waveguide (DRW) antennas. A first step in the design process is to analyze the image quality potential of...

In this paper, 60 GHz millimeter-wave indoor propagation characteristics are simulated and analyzed using the method of SBR/IM (shooting and bounding ray tracing/image). And the simulated and measured results agree well, so the correctness of the method has been validated. Some propagation parameters are obtained in the simulation, such as the indoor reception power distribution, distribution o...

A scheme for the direct conversion of millimeter and THz waves to optical signals is introduced. The compact device consists of a plasmonic phase modulator that is seamlessly cointegrated with an antenna. Neither high-speed electronics nor electronic amplification is required to drive the modulator. A built-in enhancement of the electric field by a factor of 35,000 enables the direct conversion...