In a parti cl e board factory it is important to know the thi ckness of the layer of wooden particles before pressing. A suitable resonant stripline sensor for the measurement of the mass per unit area was presented in the EuMClast year [1]. For the practical measurements, a sensor array and the necessary measurement equi pment have been developed. With thi s array the 1.8 m broad particle cake ca

A highly sensitive microwave spectrometer for the analysis of gases has been developed, using a long H01-resonator. The system is tunable in the whole Ka-band, Le. from 26 to 40 GHz. It employs a Stark modulation technique and has been optimized with respect to converted FM-noise and detector noise for maximum sensitivity. The spectra of several test gases have C2H4F2 been measured with limiting s

SUMMARY With a new, broadband matched test set-up, cable and connector screening effectiveness measurements over more than 7 frequency decades can be performed. The set-up allows to measure directive effects, which occur on both cables and connectors due to several discrete leakage points. High dynamic range (up to 150 dB) is achieved by using a combination of synthesized signal generator, synthe

improved design of superconductingMMICs with 1440 Josephson tunneljunctions is described. The junctions are integrated in four' series arrays with a parallel rf supply and a series dc circuit. MMICs designed for 70 and 90 GHz have been realized and tested. They produce stable quantized voltage steps up to 1.2 V. The long time stability of the 1 V step is greater than five hours. The output voltage

In this work, the guide is proposed as an alternati ve to increase the bandwidth of the proximity directional couplers made. with dielectric guide and capable of giving a coupling factor practically constant with the frequency. Two theoretical methods have been used in the analysis of the coupled guides: the effective dielectric constant method and Schellmnoff's method. The inclusion of metal

The theory of broadband, non-grounded loads is used for the design of non- grounded attenuators of T and type. Such devices are needed in planar (monolithic) microwave integrated circuits where holes and wrap-a rounds are non-desirable. Large bandwidth is achieved for stringent specifications on attenuation and return loss. The proposed methods is based on synthesis in the -plane. Mismatc

The design method and experimental results 8-GHz metal insert diplexer are presented. obtained with a realized 

ABSTRACT: As a result of the theory of coupled lines the scattering parameters of common nonideal directional coupler arrangements are discussed. Under certain conditions the transmission behaviour results in a codirectional, resp. a contradirectional coupling. The conditions to obtain optimum behaviour for a codirectional or a contradirectional coupler are described, as is the consequence of devi

A combination of the equivalent waveguide model for outgoing planar transmission l ines and the boundary element method, using Green's function approach is used.multimode performances(VSWR,Insertion loss, Isolation) for planar circulators can be evaluated from the multimode S-parameters which are calculated with good accuracy from the simple identification in the system of equations given by the b

A matching network for a hybrid coupler phase shifter consisting of a pair of coupled transmission lines with arbitrary length is presented. The design results in a more compact structure. The design ensures a DC isolation between the phase shifter bits.