Several application, like frequency chirped lidarradar system, opticdwireless communications and biomedical imaging, require optical transmitters that can generate rapidly tunable, low phase noise and low intensity noise millimeter wave sub-carriers. Using an electro-optic Nd:LiNbOJ microchip laser in an optical heterodyning scheme, we designed a simple, robust, monolithic and low-cost optical ...

Heterojunction Bipolar Transistors (HBTs) are considered excellent candidates for low phase noise millimeter wave applications. They exhibit outstanding high frequency performance and also low baseband noise compared to MESFET and HEMT devices. We have designed and demonstrated state-of-the art microwave and millimeter wave power HBTs using the baseline HBT process at HRL Laboratories. An HBT t...

The radio-frequency identification (RFID) concept is expanded to millimeter-wave frequencies and millimeter-wave identification (MMID) in this paper. The MMID concept and a comparison with UHF RFID are presented, showing the limitations and benefits of MMID. Three feasible applications are suggested for MMID, which are: 1) wireless mass memory; 2) an automatic identification system with pointin...

Infrared and millimeter-wave emission from Herbig Ae/Be stars has produced conflicting conclusions regarding the dust geometry in these objects. We show that the compact dimensions of the millimeter-wave–emitting regions are a decisive indication for disks. But a disk cannot explain the spectral energy distribution unless it is embedded in an extended envelope that (1) dominates the IR emission...

Performance of millimeter-wave (mm-wave) multiband orthogonal frequency division multiplexing (MB-OFDM) ultrawideband (UWB) signal generation using frequency quadrupling technique and transmission over fiber is experimentally investigated. The frequency quadrupling is achived by using only one MachZehnder modulator (MZM) that is biased at maximum transmission (MATB) point. At the output, a freq...

Circularly polarized millimeter-wave travelling-wave antennas, using substrate integrated circuits (SICs) technology, are designed, fabricated and tested. By using the SICs technology, compact antennas with low losses in the feeding structure and with good design accuracy are obtained. The elementary antenna which is composed of two inclined slots is characterized by full-wave simulations. This...