EXPERIMENTAL PULSE AND THEORETICAL I i INVESTIGATION INDEX FIBERS OF SUBNANOSECOND PROPAGATION:IN GRADED E. Nicolaisen* and J.J. Ramskov Hansen* ABSTRACT The propagation in a fibre which does not exhibit any mode coupling is investigated by varying the launching conditions. It is shown that for this fibre there exists a trade-off between dispersion and power coupling efficiency. The meas

OPTICAL GUIDING STRUCTURES BY ION-EXCHANGE J .G. GALLAGHER, I. ANDERSON, R.N. DE LA RUE ABSTRACT Singla-mode stripe and branching optical waveguide structures have been formed by silver ion-exchange techniques. The measured power transmission of a single-mode Y-junction is compared with a predicted value obtained from an approximate analysis. 

LEAKAGE OPTICAL S. T. Peng AND RESONANCE AND MILliMETER and A. A. Oliner EFFECTS WAVES ON GUIDING STRUCTURES FOR ABSTRACT Several interesting guiding structures, which utilize dielectric strips, have been proposed during the past few years for use in optical and millimeter wave integrated circuits. The sides of these strips create TE-TM coupling which has so far been neglected in published a

FIBRE OPTIC COMMUNICATION SYSTEMS C.P. Sandbank* ABSTRACT The basic requirements for practical optical communication systems are reviewed. The construction and performance of some of the key constituents such as the fibre, cable, sources, connectors and splices are discussed. Particular emphasis is placed on the special properties of optical communication systems such as the economic advanta

RELIABILITY AND OPERATING EXPERIENCE OF THE LAMPF 805-~~Z RF SYSTEM* Paul J. Tallerico ABSTRACT and modulators The 1-1/4 MWklystrons, the floating-deck modulators and the modulator triodes are described. The operating data are summarized and the fault and failure modes are tabulated for the three major components of the system. The high-voltage processing and other maintenance required to keep

THEORETICAL AND EXPERIMENTAL ATTENUATION OF THE OPEN RING LINE ~ C. Fray, A. Papiernik ABSTRACT The dispersion curve and attenuation constant of the open ring line operating in the fundamental dipolar mode is discussed and this line is shown to be a low loss structure. Measurements on a line consisting of equally spaced rings of an aluminium-alloy held by a metallic rod agree with theory. T

NEW METHOD FOR COMPUTING THE RESONANT FREQUENCIES OF DIELECTRIC RESONATORS Tatsuo Itoh * and Ronald Rudokas + ABSTRACT A new method is developed for accurately predicting resonant frequencies of dielectric resonators used in microwave circuits. By introducing an appropriate approximation in the field distribution outside the resonator, eigenvalue method. demonstrated The an analytical

INVESTIGATION OF TECHNOLOGIES, ELECTRICAL LUMPED ELEMENT CIRCUITS UP TO 15.,GHz FACHE Mi che 1 CHARACTERISTICS AND USE OF R L C ABSTRACT The advantage of the increased reproducibility, lumped elements are smaller size, less weight and a potential improved bandwidth, cost savings. With the traditional technologies, it was not possible to obtain low loss lumped circuits above 3 or 4 GHz. That is

DESIGN AND APPLICATIONS ATTENUATORS AND LOADS OF PRECISION MICROSTRIP MULTIOCTAVE H.J. Finlay +, L.G.T. Hopkins+ and J.M. Ozamiz+ ABSTRACT For precision applications MIC's have demonstrated improvements in performances by eliminating transitions which introduce interface errors. In this paper high performance MIC attenuators and loads are employed to evaluate or reduce such errors. A method i

THICK FILM MIC COMPONENTS IN THE RANGE 10 - 20 GHz D.C. R~c kard . + ABSTRACT The capability of potentially low cost thick film micros trip is extended in frequency range, augmenting previous work restricted to below 12 GHz. Line characteristics are presented and compared with thin film results. Thick film Q-factors approach 80% of thin film values and medium definition circuits are possib