A KU-BAND HYBRID-COUPLED 4-PHASE M.I.C.TECHNOLOGY H. Junghans MODULATOR IN ABSTRACT A hybrid-coupled 4-phase P.I.N. diode modulator can operate at frequencies as high as the upper Ku-band even on 25 mil alumina. Investigated are the theoretical constraints under which hybrid-coupled phase modulators, may be connected in series. It is shown, that large output reflexion coefficients are admissible

WIDEBAND PLANAR TRANSMISSION LINE PIN-DIODE ATTENUATOR/MODULATOR Stig Rehnmark * ABSTRACT A new principle for wideband attenuators is presented: The attenuator con-sists of power dividers, 90-degree phase shifters, and PIN-diodes. The power reflected at the diodes is absorbed by the isolation resistors of one of the power dividers. A new technique for phase shifters is presented: Allpass m

EXPERIM~ITAT. AND THEORETICAL STUDIES OF AVALANCHE TRANSISTORS * J.E. Carroll, ABSTRACT A.M. Winstanley +and P.J. Horsburgh + . A three terminal avalanche device is considered operating in a Trapatt type of circuit. A simplified theory is presented which suggests that good efficiencies over 30% can be obtained with bandwidths in excess of 50% and power gains around 10 dB. Experiments on a low f

PLANE FITTED EQUIANGULAR 4-ARM SPIRAL ANTENNA WITH CONICAL REFLECTOR ISOLATED OR INTO A STRUCTURE. . G. GREKOU, G. DUBOST, A. MADANI. ABSTRACT. We present an experimental study of the radiation characteristics of a plane equiangular 4-arm spiral antenna with a conical reflector, isolated in the first case. The centre of the spiral is confused with the apex of the cone (with varying a



LOW COST ACTIVE ARRAY MODULE DESIGN FOR TRANSMIT AND RECEIVE OPERATION J. Austin* and J. R. Forrest ABSTRACT This paper describes the design and testing of an active phased array element for both transmit and receive operation. Emphasis is placed on cost reduction since many elements will be used in a complete active array. A single solid-state source is used both to generate the transmitted

NEW DESIGN TECHNIQUES FOR MICROSTRIP ANTENNA ARRAYS J. R. James* and G. J. Wilson* ABSTRACT The radiation resistance of an open-circuit micros trip termination is to a good approximation, a simple function of the strip width thus suggesting a straightforward yet effective means of element control when used in a large array; furthermore the array bandwidth can be controlled to some extent. The de

AN IMPROVED ELEMENT FOR USE IN ARRAY ANTENNAS Alvin Clavin* ABSTRACT A new element is described which is useful in array antennas. This element has a circular symmetric radiation pattern, controllable beamwidth, and exhibits extremely low mutual coupling between elements in the array. A modification of this antenna element results in a single antenna having equal E- and H-plane patterns, no sid

HOT ELECTRONS MICROWAVE POWER MONITORS + FOR X AND S-BANDS J. Konopka Abstract Design and performance of very high pulse power monitors based on the thermoelectric effects of hot carriers in a semiconductor placed in the microwave electric field gradient is described. Principle of operation of the devices is presented with the special attention paid to semiconductor material choice and some

COAXIAL MILLIMETER WAVE JOSEPHSON JUNCTION and G.Jung DETECTOR S.J.Lewandowaki, R.J.Sobolewski ABSTRACT We describe a novel Josephson device made from a section of superconducting ( niobium) coaxial line and from thin superconducting (lead) membrane mounted perpendicularly to line axis. The membrane makes good galvanic contact with the outer coaxial conductor and forms a circumferential Jo