摘要:

AbstractThe research and development results achieved in Eastern Europe in the field of lightwave‐microwave combined technology are reported. Optical control of FETs, amplifiers, and oscillators; microwave modulation of lasers; lightwave‐microwave phase detection, conversion, and synchronization; and optical control of phase‐locked oscillators are surveyed. Application possibilities in beam forming of phased arrays, multichannel TV transmission and personal communications networks are reviewed. © 1993 John Wiley&son

ISSN:0895-2477    

DOI:10.1002/mop.4650060113

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractSignificant research and development in the areas of microwave photonics in Brazil are presented in this paper. These include direct microwave modulation of semiconductor laser diodes, optical control of MESFETs and HEMT's as well as high speed fiber optic components. Future directions for research in this area are discussed. © 1993 John Wiley&sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650060114

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractThis article proposes a fiber and radio extension link (FREx Link) that offers the advantage of enhancing the flexibility of the various communication systems. In this article, two examples of applications for FREx Link, the intercell connection link (ICCL) and the fiber to the area system (FTTA), are described. Some numerical results of the system design considerations are given for each example. © 1993 John Wiley&sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650060115

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAccurate noise characterization of MESFETs and HEMTs is required for the design of high‐frequency optical receivers. Here we consider a technique that extracts the intrinsic noise parameters P, R, C from measured noise data. Novel analytic expressions are presented as well as results that prove the validity of the technique. © 1993 John Wiley&sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650060116

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn advanced design procedure for MMIC GaAs direct‐coupled transimpedance amplifier for gigabit/second‐rate optical communication systems is presented. A transimpedance gain of 67 dBω up to 2.5 GHz has been demonstrated. A complete set of simulated and measured results are presented to confirm the effectiveness of the design approach. The design and the realization have been performed within the framework of ESPRIT Project No. 5018 COSMIC. © 1993 John Wiley&sons

ISSN:0895-2477    

DOI:10.1002/mop.4650060117

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractIn this article the vector field of TEMplmodes in a concave spherical quasioptical cavity is investigated by the complex source point theory (CSPT) and multipole theory (MT). The resonant frequencies for TEMpl‐modes are also obtained. © 1993 John Wiley&sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650060118

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractWe present an analytical formula that describes the wavefield behind a screen, whose amplitude transmittance is a hyper‐Gaussian function of any order n. Our results suggest a method for achieving high irradiance concentrations. © 1993 John Wiley&sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650060119

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractThe problem of scattering from a finite conductive cylinder with complex permittivity at arbitrary orientation is analyzed using a first‐order approximation to an iterative technique developed by Shifrin. The classical Kerker solution for a simple infinite dielectric cylinder is extended to a more physically realistic solution accounting for a finite‐length cylinder with frequency‐dependent complex permittivity using a modified Drude conductivity approach. The polarization matrix of the cylinder is derived from the electrostatic solution for a finite cylinder in a uniform electric field, and it is given as a function of the length‐to‐diameter ratio (aspect ratio) and the permittivity of the cylinder. The electrostatic solution for a finite cylinder does not permit a closed solution; therefore the cylinder is approximated by an inscribed ellipsoid which provides a converging analytic expression. The effects of typical variations in the length, diameter, and bulk conductivity of the cylinder were analyzed for TE, TM, and TEM polarizations. © 1993 John Wiley

ISSN:0895-2477    

DOI:10.1002/mop.4650060120

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn equivalent circuit which simulates the low‐frequency dispersion in the transconductance and the output resistance of an ion‐implanted InP JFET is presented. The dispersion consists of reductions in the transconductance and the output resistance occurring between 100 Hz and 1 MHz and involves two dominant time constants in each parameter. The equivalent circuit can be used for the design of monolithic fiber‐optic receiver preamplifiers and other small‐signal circuits. © 1993 John Wiley&s

ISSN:0895-2477    

DOI:10.1002/mop.4650060121

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractA new dual mode coupling technique for dual mode filters is presented. A slotted dielectric resonator, where notches take the place of the classical metallic coupling and tuning screws, is introduced. A theoretical analysis using the three‐dimensional finite‐element method permits rigorous prediction of the filter response. © 1993 John Wiley&sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650060122

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY