摘要:

AbstractA method of designing a series‐fed microstrip traveling‐wave array to produce a shaped pattern is described. A theoretical analysis of the traveling‐wave element is given and experimental results are presented. High efficiency and good directivity have been observed on the array. © 1994 John Wiley&Son

ISSN:0895-2477    

DOI:10.1002/mop.4650070802

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

年代:1994

数据来源: WILEY

摘要:

AbstractPlane‐wave propagation in an anisotropic chiral medium with isotropic permittivity and permeability and symmetric chirality dyadic is considered. The eigenvalue equation is formed and the wave numbers and the corresponding eigenpolarizations are given. The results make possible the construction of a polarization transformer in which one can also choose the handedness. © 1994 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650070803

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

年代:1994

数据来源: WILEY

摘要:

AbstractA variational formulation is presented for electromagnetic boundaryvalue problems involving anisotropic media. Specific functionals are given, along with a discussion of the property of the resulting numerical system, for general problems involving general anisotropic media, for lossy problems involving anisotropic media having symmetric permittivity and permeability, and for lossless problems involving anisotropic media having Hermitian permittivity and permeability. © 1994 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650070804

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

年代:1994

数据来源: WILEY

摘要:

AbstractThe diffraction problem of a dominant surface mode scattering by a finite number of metal strips placed on a surface of a planar dielectric waveguide is considered. The electromotive force technique is utilized, and results concerning the analysis and design of beam antennas with low side‐lobe level at millimeter wavelength are presented. © 1994 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650070805

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

年代:1994

数据来源: WILEY

摘要:

AbstractIn this article, the frequency‐domain impedance boundary condition used for a thin layer coating over perfect conductors is transformed to a time‐domain impedance boundary condition (TDIBC) for the case of ablique incident perpendicular‐polarization plane wave, resulting in a partial differential equation in space and time. Discretization of the TDIBC to effeciently handle the thin layer coating is presented in the context of the time‐domain finite‐difference (TDFD) technique. The TDFD solutions using our TDIBC are in good agreement with the analytical results. © 1994 John Wiley

ISSN:0895-2477    

DOI:10.1002/mop.4650070806

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

年代:1994

数据来源: WILEY

摘要:

AbstractThe stability of vertical cavity surface emitting lasers with distant external optical feedback is analyzed numerically by using the rate equation model. Results for the different cavity designs are compared. The effects of the nonlinear gain coefficient on RIN and spectral linewidth is investigated. The results can be considered as a guideline to the laser design. © 1994 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650070807

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

年代:1994

数据来源: WILEY

摘要:

AbstractNumerical modeling has an important role to play in optical, microwave, and EMC design. An objective assessment of the accuracy of such numerical modeling tools using experimental data is often hampered by the general complexity of the data to be compared. It is therefore difficult to quantify the resulting comparisons. This communication suggests that three parameters derived from correlation functions can prove useful in assessing validation comparisons. © 1994 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650070808

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

年代:1994

数据来源: WILEY

摘要:

AbstractWe report on the resonance problem of a superstrate‐loaded annular‐ring microstrip structure on a spherical body. This study is performed by using a Green's‐function formulation in the spectral domain and a moment‐method calculation. Numerical results of the resonant frequency and quality factor of the structure are presented. Both cases of the structure, used as a radiator at TM12mode and as a resonator at TM11mode, are studied. A great superstrate loading effect is observed for the structure excited at the TM12mode as a radiator. Details of the results are presented. © 1994 John Wiley&S

ISSN:0895-2477    

DOI:10.1002/mop.4650070809

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

年代:1994

数据来源: WILEY

摘要:

AbstractWideband decoupled planar dipoles are suggested for a subsurface transmitting and receiving antenna. Design parameters of the conductor‐backed cut‐off dielectric waveguide containing two planar dipoles above a lossy half space are suggested, and a bandwidth of more than 5 to 1, decoupling of ‐90 dB for about one wavelength separation are obtained. © 1994 John Wiley&Son

ISSN:0895-2477    

DOI:10.1002/mop.4650070810

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

年代:1994

数据来源: WILEY

摘要:

AbstractA theoretical analysis on the radiation pattern and the radiation resistance of an annular ring microstrip antenna mounted on a spherical body using an electric surface current model is presented. The effects of the dielectric layer and the metallic sphere are rigorously taken into account by the Green's functions in the spectral domain. Results for the antenna operating in the TM01(wraparound antenna) and TM12modes are given. © 1994 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650070811

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

年代:1994

数据来源: WILEY