摘要:

AbstractA resonant strip made of high‐temperature YBa2Cu3O6.5 + xwith x<0.5 superconductor was designed and tested in a X‐band (8‐12 GHz) waveguide. At room temperature no significant resonance was observed. A resonance appeared near 10.68 GHz at low temperature. The loaded Q was measured to be 750, comparable to that of a copper

ISSN:0895-2477    

DOI:10.1002/mop.4650010602

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

年代:1988

数据来源: WILEY

摘要:

AbstractA multichannel acousto‐optic joint transform correlator is presented. On‐plane acousto‐optic (AO) cells and a square‐law converter are employed. The AO cells are driven by frequency multiplexed temporal signals to produce spatially modulated signals. The joint transform power spectrum is generated with a square‐law converter. By inverse Fourier transformation with a coherent readout, the cross correlation of input signals can be obtained. Since the architecture can process wideband signals, it may be applied to detect multiple frequency shift keying (MFSK

ISSN:0895-2477    

DOI:10.1002/mop.4650010603

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

年代:1988

数据来源: WILEY

摘要:

AbstractPreliminary measurements of the waveguide properties of hollow‐core glass fibers filled with an index‐matching dye solution indicate that such fibers may be useful as dye laser systems. Efficient guidance of 632.8 nm light is found for various core diameters and lightwave polarization is retained over 1‐m le

ISSN:0895-2477    

DOI:10.1002/mop.4650010604

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

年代:1988

数据来源: WILEY

ISSN:0895-2477    

DOI:10.1002/mop.4650010605

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

年代:1988

数据来源: WILEY

摘要:

AbstractThe electromagnetic field modes in partial‐height ferrite circulators are classified into two categories: volume modes and surface modes. Their properties are described in detail. The method of expanding the circulator bandwidth at the millimeter wave band is investigated. A set of theoretical results are calculated for a n = 2 Chebyshev response. A Ka‐band circulator is designed. The measured minimum isolation is 15 dB over a 9‐GHz bandwidth. The experimental result and theoretical prediction are si

ISSN:0895-2477    

DOI:10.1002/mop.4650010606

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

年代:1988

数据来源: WILEY

摘要:

AbstractA network analyzer consisting of two six‐port reflectometers was constructed for use over the WR90 bandwidth. Each six‐port reflectometer comprised a symmetrical five‐port junction and a directional coupler. Laboratory tests indicated that measurement accuracies of ± 0.01 in magnitude and ±2° in phase were obtainable for both reflection and transmission coef

ISSN:0895-2477    

DOI:10.1002/mop.4650010607

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

年代:1988

数据来源: WILEY

摘要:

AbstractMoving‐spot‐illuminated semiconductor panels are used in millimeter‐wave image convertors. In order to know the performance of this system, it is required to know the response of illuminated semiconductor panels. In this article local millimeter‐wave power transmitted through an illuminated semiconductor panel scanned with a strip of shadow as a function of scanning velocity, width of the shadow strip, time, etc., are

ISSN:0895-2477    

DOI:10.1002/mop.4650010608

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

年代:1988

数据来源: WILEY

摘要:

AbstractThe spot sizes for the fundamental TE modes of InGaAsP / InP laser diodes in directions parallel and perpendicular to the junction plane have been investigated based on the effective refractive index approach. The analytical results are in good agreement with the reported measured values in the literature. The results can be used to calculate the coupling efficiency between laser diodes and single‐mode fiber

ISSN:0895-2477    

DOI:10.1002/mop.4650010609

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

年代:1988

数据来源: WILEY

摘要:

AbstractThe calculation of the static field that exists in many distributed electromagnetic systems is of prime importance since it allows preliminary design at microwave frequencies to be initiated. This article demonstrates how an absorbing Markow chain can be used to solve the Dirichlet problem, thereby yielding useful results such as field potentials, stored energy, and characteristic impedance.The theoretical basis for this method is developed, then applied to a shielded microstrip line in order to calculate line characteristic impedance. Some of the unique features of the absorbing Markov chain method will be discussed and its relationship to the probabilistic potential theory and finite‐difference techniques elaborated.The technique of absorbing Markov chains as discussed in this article represents a supplementary solution method to those currently in use and offers the possibility of detailed behavioral studies based on the movement of charged particle

ISSN:0895-2477    

DOI:10.1002/mop.4650010610

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

年代:1988

数据来源: WILEY

摘要:

AbstractAn applicator for intracavitary hyperthermia treatment of cancer has been designed and tested. The applicator is a section of a dielectric‐loaded circular ridge waveguide closed at both ends to form a transmission cavity. An aperture in the cavity wall can produce a directed heating of a tumor growing in the wall of a body cavity such as the vagin

ISSN:0895-2477    

DOI:10.1002/mop.4650010611

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

年代:1988

数据来源: WILEY