AN L-BAND INTERFEROMETER ANTENNA ARRAY USING LEAKY-WAVE CORRECTED, UNSYMMETRICAL SECTORAL HORNS C. ANCONA x ABSTRACT - The author presents a 32 interferometer L-band array, part of an air-ground experimental data link system. The array is made of 8 E-plane wide angle sectoral horns using a technique of unsymmetrical leaky-wave correction in order to synthesize the required pattern: cosecant wi

L-BAND ANTENNA FOR AIRCRAFT-TO-SATELLITE COMMUNICATIONS Hormann, Eberhard; Lovis, Dietrich; Reitzig, Rafael ABSTRACT An L-band aircraft transmit/receive antenna for the future AEROSAT system is proposed. It consists of two identical phase-scanned four-spiral antenna arrays mounted laterally on either side of the upper area of the aircraft body. The fan-beam is pointed in 10 different angu

ANTENNA PATTERNS WITH ARBITRARY SIDE LOBE TOPOGRAPHY Robert S. Elliott+ ABSTRACT A perturbation technique which will modify Taylor-type linear and circular aperture distributions to give sum and difference patterns with arbitrary side lobe topography is described and illustrated by several practical cases. A new technique for discretizing the resulting continuous aperture distributions is

PRINTED CIRCUIT RADIO LINK ANTENNA Martti Tiuri, Johan Henriksson and $tefan Tallqvist ABSTRACT A printed circuit antenna which substitutes a paraboloid antenna in radio link applications at 1.8 GHz has been developed. The antenna is a novel traveling wave antenna, a so called grid antenna. It consists of a ground plane close to which is a printed sheet with several pairs of meander lines.

THEORY AND APPLICATIONS OF BROADBAND MICROS TRIP ANTENNAS G. DUBOST, M. NICOLAS, . .. H. HAVOT . . ABSTRACT. An experimental parametric study of a micros trip antenna is given. This antenna is a flat, broad-folded dipole parallel to and at a short distance from a reflector plane. Radiating characteristics are excellent, and in particular bandwidth is sufficient enough for various applicati

DETAILED DIGITAL LOSS INVESTIGATION SAW TRANSDUCER WAVE ON THE GROUP-TYPE WITH UNIDIRECTIONAL INTER- ITS APPLICATION TO LOW INSERTION SURFACE FILTERS by Felix M. Nyffeler ABSTRACT: Filters employing the standard two-transducer configuration have an inherent 6 dB minimum insertion loss due to bidirectionality. Furthermore, they show a strong passband ripple owing to various reflections bet

APPLICATION SYSTEMS OF SAW CHIRP TRANSFORM FILTER IN SPREAD SPECTRUM COMMUNICATION * L. B. Milstein and R. T. Webster P. Das, ABSTRACT Narrowband jamming of a spread spectrum signal can be filtered out in the frequency domain using acoustic surface wave convolvers as real time Fourier transformers. This is accomplished by employing modulated chirp signals as inputs. The particular frequency ra

MULTIPLE REFLECTION AND MULTI-ECHO ELECTROACOUSTIC BULKWAVE DELAY LINES PUYHAUBERT J. - SEGUIN M. ABSTRACT The present paper describes in the microwave bulkwave By backfocusing sible to concentrate delay line. new solutions delay lines. to reduce the the the diffraction transducer, efficiency losses it is of the pos- the spreaded the acoustic beam produced by waves and increase In t

BEHAVIOR AND CURRENT PERFORMANCES OF SAW AND BAW OSCILLATORS A. SCHAER- ABSTRACT Presented are the theory of operation and experimental operating results for two new types of acoustic-wave oscillators, one incorporating a surface acoustic-wave (SAW) delay line and the other a bulk acoustic-wave (BAW) delay line. SAW oscillators have been made that operate at up to 500 MHz, whereas the BAW t