AN BLIMBN'l POSITION MOOOLAmD ANT.INNA ARRAY G. S. SaDl'al. and M. G. Sharma' ABSTRACT Analysis has been presented for a non-uniformly spaced linear array of large number of isotropic elements at locations obtained by sinusoidal position modulation. Studies on the space factor of such an array reveal lower sidelobe and grating plateaux levels in comparison to the uniform array. This type of a

ELEMENT DESCA PATTERNS FOR LINEAR PHASED ARRAYS WITH TT ERING NET WORKS J. Bach Andersen and Amir 1. Zaghloul ABSTRACT The limitations on the element pattern for linear arrays are studied and it is shown that the ideal element pattern is the omnidirectional pattern, leading to a very wide angular scan. Lossless interconnecting networks are used to improve the element pattern and the

MICROSTRIP ARRAY ANTENNA Anders G. Derneryd ABSTRACT An equivalent network for rectangular shaped microstrip radiating elements is derived. In order to simplify the problem the radiating elements are considered as two slots separated by a transmission line of low characteristic impedance. The slots are characterized by their equivalent admittances. The radiation conductance is derived and found

LARGE SIGNAL EFFECTS IN THE AVALANCHE REGION OF HIGH-EFFICIENCY DIODES IMPATT P. A. Blakey* ABSTRACT The avalanche different even that this will structures. regions of 'lo-hi-lo' and 'hi-la' IMPATTs are significantly though their drift regions may be similar. It is likely cause differences in the large signal behaviour of the two This possibility is investigated using computer simulation. 

THE DESIGN AND OPERATION OF TRAPATT DIODES FOR SYSTEMS REQUIREMENTS IN THE l-5GHz FREQUENCY BAND B.H. Newton, M. Pierrepont, C.D. Corbey, M.A. Ayling, J.G. Summers, M. Stace ABSTRACT Trapatt devices and circuits have been designed for use as solid state transmitters for pulse radars in the l-5GHz range. This has been achieved as a result of a device and circuit investigation in which pulse power



MICROWAVE AND HIGH FREQUENCY APPLICATIONS OF POLYCONDUCTORS M. A. K. Hamidt and M. H. Rahmani" ABSTRACT - Several applications of V02 polyconductors at microwave frequencies are suggested for monitoring microwave power, switching, detection, protection, noise generations or steady-state oscillation. For these applications the basic microwave properties of V02 devices or, film are measured to

HIGH EFFICIENCY X-BAND TRAPATT AMPLIFIERS AND OSCILLATORS C.H. Oxley, A.M. Howard, S.M.R. Gordon and J.J. Purcell ABSTRACT Silicon p+nn+ TRAPATT diodes have given X-band amplification with added power efficiencies of up to 25% and fundamental X-band oscillation with efficiencies as high as 35%. The diodes are fabricated by an Integral Heat Sink (IHS) technology and the p+n junction is

AMPLITUDE AND PHASE CHARACTERISTICS OF MICROWAVE SOLID STATE AMPLIFIERS FOR PHASED ARRAY ANTENNA SERVICE. Donald W. Griffin ABSTRACT The amplitude and phase of the fundamental and its harmonics at the output of various microwave solid state amplifiers have been measured as a function of load mismatch. Results are obtained for load impedances that lie on a selected series of VSWR circles on a S

DISTORTION CHARACTERISTICS IMPATT DIODE OSCILLATORS T .Berceli OF INJECTION LOCKED GUNN AND ABSTRACT The distortion characteristics of injection locked Gunn and Impatt diode oscillators are investigated both theoretically and experimentally. For FM signal transmission, the distortion is determined mostly by the derivated characteristics: group delay, AM-to-PM conversion and AM compression. Due