ACOUSTIC QUESTIONS MODEL~-BAND AIRCRAFT ANTENNA RADIATION COVERAGE H. S. Hayre* ABSTRACT The number and location of cavity-blocked T-slot antenna for a specified radiation coverage on F-102 aircraft were optimized using an acoustic airframe model, and a special O.2 MHz (thickness mode) spherical transducer to model the antenna. The model results were verified using the full-scale electromag

NEW ANTENNAS Friedrich ON NEW NONMETALLIC Zboril* MATERIALS R. AB srRACT Carbon and boron composites replace alloys in structures. Their favorable weight to strength ratio should not be impaired by additional metallic ground planes for antennas. Foremost comes lightning protection as these materials cannot handle energy surges. In cooperation with the Lightning and Transient Research Institute



SOLDERED PIEZOELECTRIC TRANSDUCER A. SCHAER ACOUSTIC-WAVE COMPONENTS ABSTRACT Presented are results obtained from acoustic-wave components and devices employing "soldered piezoelectric transducer" technology and operating in the VHF and UHF bands. Based upon the intermetallic diffusion of two layers of indium, deposited beforehand on both the propagation substrate and the piezoelectric transd

A UNITY GAIN DELAY MODULE OPERATING AT 3 GHz T M Mason* ABSTRACT A unity gain instantaneous inary results 22 µS delay module operating bandwidth of 500MHz will be obtained with a 25MHz chirp at 3GHz and offering described together with radar. an prelim- The 226 x 80 x 32mm package contains amplifiers, PIN switches, circulators and a Spinel bulk wave acoustic delay line integrated in gold bon

THE INFLUENCE LINE OF ANISOTROPY ON THE STABILITY OF A BEAM GUIDED DISC DELAY E. Papadofrangakis*, ABSTRACT I.M. Mason*, and J. Chambers*. The effect of anisotropy on disc delay line beam propagation is examined means of a paraxial ray analysis. Anisotropic transfer matrices describe the disc's optical characteristics. The theory is applied to explain different propagation loss experimenta

MICROWAVE ACOUSTIC SURFACE-WAVE COMPONENTS P. HARTEMANN and R. GAUDRY * ABSTRACT Various acoustic surface-wave components operating at frequencies higher than 1 GHz have been realized using an electron beam pattern generator. Thus delay lines ,filters and oscillators have been realized on lithium niobate and quartz substrates. Simple and tapped delay lines using transducers with constant or

NONLINEAR EFFECTS ON LiNb03 DELAY LINE COATED WITH A POLYCRYSTALLINE CdSe FIU1 P.Merilainen and M.Luukkala ABSTRACT The resistance of a polycrystalline photoconductive CdSe film upon a piezoelectric acoustic surface wave delay line is investigated. During the acoustic pulse propagates in the line, a resistance decrease by a factor up to ten is revealed. The relationship between the resistance cha



COMPONENTS NARROW -STRIP FOR ACOUSTIC SURFACE WAVES BASED ON CUTOFF SECTIONS A. A. Oliner and T. Minami ABSTRACT A new class of components for acoustic surface waves has been developed which is based on a simple structure that is equivalent to a small section of below -cutoff transmission line. The components include power splitters, directional couplers, nonreflecting delay-line taps,