摘要:

AbstractA reduced‐sized rat‐race coupler based on a meander line configuration, with bend equivalent phase length compensation, is presented. © 1993 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650061402

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

年代:1993

数据来源: WILEY

摘要:

AbstractThe spectral index method is applied to nonreciprocal quasi‐TM mode phase shifters based on rib‐type waveguide structures. It compares well with the much slower finite‐difference method. © 1993 John Wiley&Son

ISSN:0895-2477    

DOI:10.1002/mop.4650061403

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

年代:1993

数据来源: WILEY

摘要:

AbstractAn optical fuzzy matrix‐vector processor is designed to implement fuzzy associative memory. By spatial encoding and thresholding operation, the two basic operations needed by fuzzy associative memory, maximization and minimization, are realized optically. Experimental results are given as well. © 1993 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650061404

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

年代:1993

数据来源: WILEY

摘要:

AbstractThe fringe shape stability of fiber ring resonators that incorporate an orthoconjugate reflector (OCR) is discussed. A resonator with a 90° polarization rotation and an OCR displays a stable fringe shape upon reflection, independent of the input polarization and of the loop birefringence. © 1993 John Wiley&Sons, In

ISSN:0895-2477    

DOI:10.1002/mop.4650061405

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

年代:1993

数据来源: WILEY

摘要:

AbstractWave propagation along a closed rectangular chirowaveguide is studied. The coupled differential equations governing the transverse variation of the transverse components of the electric field have been established and a zero‐order solution has been proposed. This solution provides the corresponding β ‐ ω diagram, whose characteristics are investigated. © 1993 John Wiley&Son

ISSN:0895-2477    

DOI:10.1002/mop.4650061406

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

年代:1993

数据来源: WILEY

摘要:

AbstractAt high data rates and gigabit schemes, orthogonal optical‐fiber pulse position modulation (PPM) prematurely exhausts the available pulse width resources. Multiple PPM (MPPM) offers improved throughput while preserving the PPM sensitivity attraction. The multiple pulse positions per pulse width place a high demand on the synchronization subsystem. We propose MPPM for the optical fiber channel, then investigate the synchronization requirements at the chip, symbol, and frame rates. An original spectral characterization is presented for the format, illustrating that symbol and chip synchronization are achievable from the data stream. Frame synchronization is examined and a novel technique based on natural sequences is proposed and demonstrated, resulting in the extraction of both the frame frequency and the frame phase. Data pattern dependency is eliminated through an original technique, and a practical implementation is given. Practical results are presented for the synchronizers and shown to correlate with the developed models. © 1993 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650061407

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

年代:1993

数据来源: WILEY

摘要:

AbstractHelicoidal bianisotropic materials (HBMs) are rotationally inhomogeneous in one spatial direction. A simple procedure to derive exact solutions for axial propagation of electromagnetic waves in general HBMs is presented here. © 1993 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650061408

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

年代:1993

数据来源: WILEY

摘要:

AbstractThe field distributions and cutoff equation of the propagating modes in chiral parallel‐plate waveguide are derived and the effects of chirality admittance on the cutoff wavelengths of the fundamental hybrid modes are examined. The results show that the cutoff wavelengths of the fundamental hybrid modes are approximately proportional to ζc, and that in chiral parallel‐plate waveguides, the longitudinal components of electric and magnetic fields are always coupled as in the chirowaveguide, etc.; TE, TM, or TEM modes cannot be supported. © 1993 John Wiley&Sons

ISSN:0895-2477    

DOI:10.1002/mop.4650061409

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

年代:1993

数据来源: WILEY

摘要:

AbstractWe show how high‐order narrow‐band microwave filters can be built with the help of various unitary first‐order recursive cells in strict accordance to low‐frequency principles. We illustrate our approach with the simulated results for a third‐order filter in the 2.25–8.4‐GHz frequency range. © 1993 John W

ISSN:0895-2477    

DOI:10.1002/mop.4650061410

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

年代:1993

数据来源: WILEY

摘要:

AbstractAn angular‐spectrum method combined with the Galerkin procedure has been used to evaluate the electromagnetic scattering of a beam radiated by an aperture antenna after being incident obliquely upon a strip grating. Integral expressions for the transmitted and reflected fields are obtained. The incident beam radiated by the antenna is diffracted in several beams corresponding to the propagative Floquet harmonics. An angular shift of the transmitted and reflected fundamental harmonic beams has been shown. Comparison between numerical and experimental results validates this method. © 1993 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650061411

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

年代:1993

数据来源: WILEY