MICROSTRIP LINES BAND-PASS FILTERS USING NONUNIFORM COUPLED Sener Uysal and John Watkinsl ABSTRACT Dummy channels are introduced into the coupled region to achieve physical realizability and significantly increase rejection in nonuniform type coupled-line filters. Theory is verified by a filter circuit designed on alumina substrate to demonstrate 4 different bandpass filters using two casca

REALIZATION OF A POLARIZATION FILTER BASED ON THE ASSOCIATION OF RECTANGULAR AND CIRCULAR WAVEGUIDE SECTIONS. C. SABATIER.. ABSTRACT A new polarization filter with no element inside the circular waveguide is presented. It is realized by the insertion of rectangular waveguide sections in a circular waveguide. The validity of this new design is verified on a prototype model. 

ANALYSIS COUPLER AND DESIGN OF ULTRA MINIATURE HYBRID RING DIRECTIONAL !It J.Ph. Coupez, A. Peden, Ch. Person ABSTRACT: This This respect described confirm the paper circuit to a proposes corresponds common with together theoretical an ultra to coupler the approach. miniature a reduction (3g/2 method ring of ring). of analysis directional about The and 50 new coupler percent coupler e

MICROWAVE RECURSIVE AND TRANSVERSAL P. GUILLON* ACTIVE FILTERS USING LANGE COUPLERS L. BILLONNET*, B. JARRY*, ABSTRACT This paper proposes new recursive and transversal implementation techniques based upon the use of Lange couplers at microwave frequencies. We show how Lange couplers with various coupling values, can be effectively employed in the design of recursive and transversal str

SCATTERING BY HAIL AND SLEET PARTICLES AT MICROWAVE AND MILLIMETER . FREQUENCIES W Zhangl ABSTRACT WAVE Scattering by hail and sleet particles, prolate and oblate spheroids with axial ratios up to 1.8, is considered using the point matching technique. For computing, the truncated modal index and the recurrence relations are discussed. Numerical results, at 30 and 100 GHz, show that the extinctio

RECENT RESULTS OBTAINED FROM OPEN RESONATOR MEASUREMENTS WHICH RELATE TO FUNDAMENTAL PROCESSES IN PROP AGAnON L J Auchterlonie, P N Fletcher ABSTRACT Recent measurements taken in three open resonator systems operating at frequencies in bands around l0GHz, 350Hz and 700Hz and with the aid of a microcomputer which manages the result taking have allowed each of the following to be achieved: a) record

EXPERIMENTAL U. CASIRAGHI . COMPARISON - O. MANDICH BETWEEN ANGULAR AND SPACE DIVERSITIES ON A 60 KM HOP IN 4 GHZ BAND . - S. CANDEO .. Abstract This article summarizes the most significant results applicable to the angular (AD) and space (SO) diversities experiment. started at the beginning of May 1991 and still ill progress. on a 60 Km liDeof-&ight microwave digital radio link in the no

ApPLICATION OF THE WAVELET PROPAGATION DATA D. Vanhoenacker, P. Carrette, A. Lenoir1 TRANSFORM TO THE ANALYSIS OF Abstract The Microwaves Laboratory has been involved for more than ten years in the analysis of propagation data received from a satellite: first the OTS satellite and now the Olympus satellite of the E.SA. Different transforms have been applied to the data in order to extract info

LIMITS ON THE ACCURACY OF MICROWAVE RADIO PROPAGATION MODELLING AND ON THE EXTRAPOLATION OF MEASURED DATA BASES Ian J. Dilworth* ABSTRACT The interpretation of rainfall and clear weather radio propagation data, the generation of short and long term statistics for radio systems design and factors which are shown to increase potential errors in the application of measured data are discussed. The app

140 MBIT/S 32QAM XPIC TRIAL RESULTS u.CASlRAom. LSAINt. P. VIrALI- ABSrRAcr The frequency reuse technique can be adopted for doubling the capacity (Bits/Hertz) of digital radio systems. The newly developed 140MBs/32QAM Telettra Modems equipped with Cross Polar Interference Canceller (XPIC) have been tested successfully on a 6OKm 4GHz link in the North of Italy.This paper presents the main experi