ISSN:1050-1827    

DOI:10.1002/mmce.4570050602

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

年代:1995

数据来源: WILEY

摘要:

AbstractTwo new configurations of patch antennas are introduced, which provide dual‐band and dual‐polarization operations. The two patches have a square and cross shape, and are printed on a single layer; the dual‐frequency and the dual‐polarization behavior is obtained by means of four narrow slots close to the edges. Excellent decoupling between the two orthogonal modes at each frequency is obtained in both configurations. Furthermore, a satisfactory performance of simultaneous matching when using a single feed point is demonstrated. Simple and accurate design formulas to predict the two resonant frequencies are derived on the basis of a physical model and tested by using a full‐wave analysis. Some prototypes have been carried out and

ISSN:1050-1827    

DOI:10.1002/mmce.4570050603

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

年代:1995

数据来源: WILEY

摘要:

AbstractRigorous analysis of a four‐pole elliptic filter, constructed by placing two cascaded dielectric resonators operating on their first hybrid mode, is performed using the finite element method. Sensitivity analysis of the input‐output and the interresonator rectangular and cross irises is presented. Theoretical and experimental results are compa

ISSN:1050-1827    

DOI:10.1002/mmce.4570050604

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

年代:1995

数据来源: WILEY

摘要:

AbstractUsing the modified conformal mapping technique, closed‐form quasistatic design equations for covered microstrip slot/parallel‐coupled lines are derived in this article. They are found to be more accurate than the existing ones, when compared with the rigorous results by numerical methods. Specifically, the derived equations for the even‐mode properties of slot‐coupled lines and those for the odd‐mode properties of parallel‐coupled lines are extremely useful because the existing counterparts are either too rough or too inaccurate for use. In addition, two sets of available design equations for covered microstrip single line, which is equivalent to the covered microstrip slot‐coupled lines under odd‐mode excitations, are checked and recommenda

ISSN:1050-1827    

DOI:10.1002/mmce.4570050605

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

年代:1995

数据来源: WILEY

摘要:

AbstractSimple and correct formulas in regard to frequency dispersion are derived for the calculation of an isotropic effective dielectric constant for the microstrip line on m‐cut sapphire substrate. The formulas were verified by comparison to the results of full‐wave analysis based on the equivalent surface impedance approach. The temperature dependence of the dielectric permittivity of sapphire is taken into acco

ISSN:1050-1827    

DOI:10.1002/mmce.4570050606

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

年代:1995

数据来源: WILEY

摘要:

AbstractThe effect of undercutting on the electrical parameters of general single and coupled quasi‐TEM lines in a multilayered dielectric is studied by an efficient quasistatic numerical method. Results are presented for characteristic impedance, propagation constant, and attenuation constant in single lines; two symmetrical coupled lines; and a four‐line system. In all cases studied a significant increase of losses has been obser

ISSN:1050-1827    

DOI:10.1002/mmce.4570050607

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

年代:1995

数据来源: WILEY

ISSN:1050-1827    

DOI:10.1002/mmce.4570050608

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

年代:1995

数据来源: WILEY

ISSN:1050-1827    

DOI:10.1002/mmce.4570050609

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

年代:1995

数据来源: WILEY

ISSN:1050-1827    

DOI:10.1002/mmce.4570050610

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

年代:1995

数据来源: WILEY

ISSN:1050-1827    

DOI:10.1002/mmce.4570050601

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

年代:1995

数据来源: WILEY