A HEMISPHERICAL ANTENNA COVERAGE, SELF-PHASED ETCHED TURNSTILE (SPET) V. K. LAKSHMEESHA, S. PAL, R. ASHIYA G.S. SEETHARAMAN, L. NICHOLAS ABSTRACT A new cavity backed printed turnstile antenna employing self phasing principle is reported. The A/4 deep cavity is shaped in the form of a rhombus of 0.44A side to enable formation of strip dipoles of l+jl & l-jl impedances to achieve turnstile

NEW POLARIZATION SWITCHING TECHNIQUE OF MICROSTRIP ANTENNA Kiyohiko ITOH and Hiroyuki OHTSUKA # ABSTRACT This paper deals with a new technique of polarization switching using a rectangular microstrip antenna which is electromagneticallycoupled in close proximity to the micros trip feed line. The paper illustrates the operation principle which is verified experimentally. More precise experiments

THE APPLICATION OF CYLINDRICAL NEAR EVALUATION OF A MULTI BEAM ARRAY FIELD RANGE TECHNIQUES FOR THE M.T. Brian *, B. Howe t & Z.F. Voyner t ABSTP~CT Experimental results are presented for the radiation patterns of a 19-beam, active, trasmit/receive Multibeam Array Model (MAM), obtained on a recently developed Cylindrical Near-Field (NF) Range at BAe, Stevenage. The hardware and software

NEAR FIELD MAPPING OF MICROSTRIP ANTENNAS E. Levine, S. Shtrikman and D. Treves ABSTRACT An automatic measurement technique for near field mapping of microstrip structures is described. Several field mapping examples indicate that this technique can serve as a diagnostic tool for microstrip antennas. 

PROPERTIES OF MICROSTRIP ON SEMICONDUCTOR AND COPLANAR SUBSTRATES LINES P. KENNIS, P. PRIBETICH and Ph. GELIN* M. AUBOURG, J.P. VILOTTE, F. GODON and Y. GARAULT** Abstract In M.I.C. technology it is important to know well the propagation properties of planar lines laid on semiconductor substrates. For this purpose we have developped two complementary theoretical analysis. The first one based o

DIFFRACTION OF THE TE10 MODE BY A SYMMETRICAL H-STEP DISCONTINUITY IN A RECTANGULAR WAVEGUIDE V. Krichevsky* and D. F. DiFonzo* ABSTRACT The diffraction of the TE10 mode by a s~~etrical H-step discontinuity in a rectangular waveguide for the multimode case is analyzed. The Wiener-Hopf technique is employed to obtain the scattering matrix. The solution for the amplitudes of the resulting modes is t

ON THE POLARIZATION OF THE TEM-LIKE MODE IN SHIELDED MICROSTRIP TRANSMISSION LINE E. E. HASSAN* ABSTRACT A variational expression in the form of an integral involving the propagation constant and the field along the two media interface in a shielded micros trip transmission line is derived. Using the Rayleigh-Ritz method along with the original expression, the relative magnitudes of the electric

VARIATIONAL ANALYSIS OF A DIELECTRICALLY LOADED CORRUGATEDWAVEGUIDE Ismo V. Lindell and Ari H. Sihvola ABSTRACT An easily fabricated type of corrugated waveguide is described and a variational method is applied for the calculation of its propagation properties. The stationary functional is of unusual type, because the boundary susceptance of the corrugated guide is conceived as a nonstandard e

PROPAGATION CHARACTERISTICS OF OPEN CORRUGATED WAVEGUIDES A. D. Olver and F. F. Dubrovka* ABSTRACT The propagation characteristics of open corrugated waveguide are studied. The analysis includes space-harmonics. Experimental verification using a resonant cavity has confirmed that space-harmonics are necessary in order to obtain good agreement between measurement and theory. A parametric study

ANALYSIS OF PRINTED TRANSMISSION LINES FOR MONOLITHIC INTEGRATED CIRCUITS Y. C. Shih and T. Itoh* ABSTRACT Planar transmission lines formed with MIS and Schottky barrier contacts are analyzed based on the spectral domain technique. Depending on the frequency and the resistivity of the substrates, three different types of fundamental modes are predicted. The calculated slow-wave factors an