CDMA AND SPREAD SPECTRUM TECHNIQUES SUS FDMA AND TDMA IN CELLULAR MOBILE APPLICATIONS P. Jung~ P. W. Baier.. Ab8tract VERRADIO In cellular mobile radio a changeable number K of users has to be accommodated. Each of the K different users may access an M -ary symbol alphabet. Therefore, some sort of multiple access principle must be implemented. To date, in the second generation mobile telecommuni

SAW MICROSTRIP ANTENNA-DUPLEXER FOR RADIO COMMUNICATION TRANSCEIVERS IN THE GHZ RANGE H. Meier*, R. Weigel*, K. Anemogiannist, P. Russer* ABSTRACT Design, end and fabrication in time and performance part of a SAW (containing microstrip a SAW front-end circuit at 1.7 GHz The for and filter, The applications division multiple (containing access (TDMA) systems are reported. front- consists of a tra

A MOBILE ANTENNA FOR THE DIGITAL SATELLITE RADIO (DSR) W. Grabow. ABSTRACT t and H.-J. Schrewe. An adaptive antenna for mobile reception of the digital satellite radio (DSR) is presented. The antenna system is developed for the 12 GHz frequency range and left-hand circular polarization. It consists of four planar arrays, each with 8 x 32 microstrip patches. The design of the antenna consi

ON THE ApPLICABILITY OF FEC-CODING FADING CHANNELS IN INTER-VEHICLE ON RAYLEIGH COMMUNICATION Mark Achten1), Werner Kremer1) , Dr. Erich Lutz2), Wolfgang Schafer2) 1. ABSTRACT This paper deals with the applicability of FEC coding in short range mobile radio networks for inter vehicle communication where sender and receiver are in motion. A propagation model is introduced which is composed

A UTD Wave Propagation Manfred Lebherz, Thomas Kiimer * Abstract Model For Microcell Planning Purposes The system planning methods for the new services in individual communication (mobile radio, PCN) require coverage prediction mainly in urban areas. Characteristic for the wave propagation in these areas are multipath effects due to multiple reflection and diffraction between buildings. Since

A PLANAR BALANCED SCHOTIKY-DIODE MIXER APPLICATIONS DEVICE FOR MILLIMETRE-WAVE J.A. Wells. and N.J. Cronin. ABSIRAcr A GaAs Schottky diode integrated circuit has been developed for use as the mixing element in a wideband balanced mixer. The chip consists of two monolithic diodes with low parasitics and their associated antenna coupling structure. The I-V characteristics of the diodes are equ

A 93 GHz-DIELECTRIC RESONATOR OSCILLATOR Helmut Barth. ABSTRACf The set-up and performance of a 93 GHz dielectric resonator stabilized GaAs Gunn oscillator is described. The oscillator performs in the 2nd harmonic mode: Its fundamental frequency is stabilized by the dielectric resonator while only the harmonic frequency is coupled to the output. Besides of the very compact and low cost arrangemen

V-BAND MONOLITHIC GaAs IMPATT-OSCILLATOR W Bogner, J Freyer - ABSTRACT Design oscillator matching nator line grown output maximum has model. power and on been As of fabrication semiinsulating the active MBE. 30 active device. mW at an investigated of a monolithically GaAs device a substrate and the by integrated oscillator integrated is described. rectangular the use yielding of %. is 3.

COPLANAR MONOLITHIC SILICON IMPATT TRANSMITTER J. Buechler, * K.M. Strohm, * J.F. Luy *, T. Goeller,+ S. Sattler, + P. Russer + ABSTRACT A coplanar W-band transmitter incorporating a monolithically integrated IMPATT diode in a self radiating slot line resonator has been designed and fabricated with molecular beam epitaxy (MBE) on a high resistivity silicon substrate. A pulsed radiated output pow

AN ON-BOARD 50 GHz BAND LOW-NOISE AMPLIFIER FOR MILLIMETER WAVE PERSONAL SATELLITE COMMUNICATIONS MASAFUMI SHIGAKP , SATORUSUGAWARA* , TETSUO YNWVIU * , YOJI OHASHI * * , HAJIME IWATSUKI * * * , YrnHIHIRO KAWASAKI * *, TADAYCEHI KATO * * * ABSTRACT An onboard 50 GHz band low-noise amplifier for millimeter wave personal long satellite communications is developed. A 100- µm wide and 0.25-µm gate H