BROADBAND DUAL-POLARIZED PRINTED ARRAYS E. Levine *, S. Shtrikman ** ABSTRACT Two double-sided printed-dipole arrays The arrays operate efficiently in two large band of frequencies. Experimental of this antenna. are combined in the same aperture. orthogonal polarizations over a results verify the practical value 

A NOVEL PHASED ARRA Y OF SLITIED ASYMME1RIC RIDGE WAVEGUIDES F. Frezza+, M. Guglielmi*, and P. Lampariello+ ABSTRACf In recent years, much effort has been devoted to the study of new antennas for millimeter-wave applications. In this paper we present the theoretical analysis of a novel linear phased array composed of line sources The which wall. are asymmetric performed ridge is wave

HIGH-PASS DIRECTIONAL COUPLERS USING A SIMPLE LINEAR COUPLING FUN4TION Dr. John Howard*, Har Mohinder Singh** INTRODUCTION Wideband directional couplers are among the microwave components extensively used in electronic warfare, electronic countermeasures, and instrumentation. In this paper, a simple straight line coupling function is used to design a high-pass directional coupler. The rip

SURF ACE MODES HIGH POWER BROADBAND WAVEGUIDE Y - JUNCTION CIRCULATORS W.B. Dou*, G.S. Wang** ABSmACT IN this paper, At is to the CW-power shown form core a new and its type the of waveguide enduring isolation modes increasing circulators. are given. Surface modes, High power, fields the is circulators power of the fields distribution enduring The power calculated 20 dB over have circ

A MONOLITHIC, PORT-INTERCHANGED RAT-RACE HYBRID USING A THIN FILM MICROSTRIP LINE CROSSOVER Hiroyuki N AKAMOTO*, Tsuneo TOKUMITSU* and Masayoshi AIKA W A ** ABSTRACT A very small, port-interchanged MMIC rat-race hybrid using a crossover structure of multilayer thin film microstrip lines is proposed for highly flexible and miniaturized function blocks such as balanced mixers, frequency doublers an

A SECTORAL PLANAR 6-WAY HYBRID WITH A RESISTIVE SLOT POWER DIVIDER Moriyasu Miyazaki, Osami Ishida, and Tsutomu Hashimoto * ABSTRACT -.----.--A sectoral planar six-way hybrid power divider has been developed with an isolation higher than 20dB, over a 30 percent frequency bandwidth in X-band. The output-port isolation is obtained by a resistive slot in the sectoral part and resistive shee

A roMPACT KA BAND CW DOPPLER RADAR WITH HIGH IF AND ITS SYSTEM NOISH ANALYSIS LI DUN FU WU DUAN ABSTRACT A new circuit structure of the high IF Doppler radar is raised in this paper. It employs the leaked 1.0 power of the balanced mixer to generate the reference signal, and a four-port circulator is used to combine all the other components together. Not only the advantage of high sensitivity of t

Feasibility of a Synthetic Antennas (ROSAR) Helmut Abstract Klausing Aperture Radar with Rotating * ROSAR (Rotor-SAR) is a synthetic aperture radar concept based on rotating antennas of a helicopter for pilot sight target detection and target localisation with high resolution. The ROSAR concept has potential benefits for civil and military helicopterborne imaging application, if the antennas

A RADAR ALTIMETER WITH SYNTHETIC APERTURE PROCESSING H.D. Griffiths and B. Purseyyed ABSTRACT The design of a radar altimeter, using synthetic aperture processing to achieve high spatial resolution in measurements of land topography, is described. The radar incorporates several novel features, such as digital generation of the transmit and deramp local oscillator waveforms, which allow very

An E'