A SAW filter bank using hyperbolically tapered transducers

Solie, L.P.; Fredricksen, H.P.; Lins, S.; Nelson, Ciji L.

doi:10.1109/ultsym.1988.49346

Cited by 17 publications

(4 citation statements)

References 1 publication

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“…The spatial resolution is achieved by the use of so-called tapered interdigital transducers ago by Van de Heuvel [5]. A detailed discussion of (TIDT) as first introduced over more than 25 years its properties and applications is given for example by Solie et al in [6]. The basic operation of the tapered transducer is shown in Fig.…”

Section: Tapered Idts For Spatial Resolution Resolved Imaging Of Opti...mentioning

confidence: 99%

SAW tomography-spatially resolved charge detection by SAW in semiconductor structures for imaging applications

Streibl¹,

Beil²,

Wixforth³

et al. 1999

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)

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r r o w acoustic beams a l l o w i n g for t h e s c a nn i n g of p h o t o g e n e r a t e d charge d i s t r i b u t i o n s . nate of the optical s i g n a l are readily read out U s i n g a s p e c i a l l a y o u t , both x and y-coordiage i n f o r m a t i o n c a n be gathered w h e n a tomo-in a s i n g l e f r e q u e n c y s w e e p . C o m p l e x 2D imgraphic i m a g i n g t e c h n i q u e is a p p l i e d .

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Section: Tapered Idts For Spatial Resolution Resolved Imaging Of Opti...mentioning

confidence: 99%

SAW tomography-spatially resolved charge detection by SAW in semiconductor structures for imaging applications

Streibl¹,

Beil²,

Wixforth³

et al. 1999

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)

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show abstract

“…Another SAW multiplexer design employs hyperbolically-tapered input and output lOTs [121], [168]. The smallaperture output lOTs are positioned on either side of the single wide-aperture input lOT covering the total frequency band.…”

Section: Sa W Multiplexer Techniquesmentioning

confidence: 99%

“…In this way, a 14-channel multiplexer with a total bandwidth of 120 MHz (1 octave) centered at 180 MHz achieved 40-dB out-of-band rejection with insertion loss IL = 19 dB. When cascaded, these filters yielded 80-dB out-ofband rejection with IL = 30 dB [168].…”

Section: Sa W Multiplexer Techniquesmentioning

confidence: 99%

Applications of surface acoustic and shallow bulk acoustic wave devices

Campbell

1989

Proc. IEEE

111

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Applications of surface acoustic wave (SA W) and shallow bulk acoustic wave (SBA W) devices are reviewed. SA W-device coverage includes delay lines and filters operating at selected frequencies in the range from about 10 MHz to 11 GHz, modeling with singlecrystal piezoelectrics and layered structures, resonators and lowloss filters, comb filters and multiplexers, antenna duplexers, harmonic devices, chirp filters for pulse compression, coding with fixed and programmable transversal filters, Barker and quadraphase coding, adaptive filters, acoustic and acoustoelectric convolvers and correia tors for radar, spread spectrum, and packet radio, acoustooptic processors for Bragg modulation and spectrum analysis, real-time Fourier-transform, and cepstrum processors for radar and sonar, compressive receivers, Nyquist filters for microwave digital radio, clock-recovery filters for optical fiber communications, fixed-, tunable-, and multimode-oscillators, and frequency synthesizers, acoustic charge transport (ACT), and other SA W devices for signal processing on gallium arsenide, SA W sensors, and scanning acoustic microscopy. SBA W-devices applications include gigahertz delay lines, surface transverse wave resonators employing energy-trapping gratings, as well as oscillators with enhanced performance and capability.

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“…Because of the influence of transducer impedance, SFIT filters normally generate an inclination in the passband region. To overcome this problem, overlap weighting techniques 11,12) have been used to flatten the amplitude passband. To this end, in this paper, using a curve fitting technique, 13) an overlap weighting function is proposed.…”

Section: Introductionmentioning

confidence: 99%

Frequency Responses of Surface-Acoustic-Wave Filters with Two-Track Slanted Finger Interdigital Transducers

Tung¹,

Ro²

2005

Jpn. J. Appl. Phys.

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In this study, the scattering characteristics of a novel surface-acoustic-wave (SAW) filter with two-track slanted finger interdigital transducers (SFITs) are investigated. The novel SAW filter consists of two-track input and output SFITs, with each track configured in many subfilters in parallel connection. Because the arrival time of a SAW may differ among subfilters, passband ripples appear. However, by properly controlling the gap length between the input and output SFITs of each track, passband ripples can be eliminated evidently. Moreover, due to differences in radiation conductance among subfilters, a curve fitting technique is used to design the overlap width of each subfilter to maintain the passband responses of the SAW filter as flat as possible. A Chebyshev polynomial and a two-step weighting technique are employed to decrease sideband level. Simulation results show that by tailoring SAW SFITs and the gap difference of each track, a high-performance broadband IF filter can be obtained.

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A SAW filter bank using hyperbolically tapered transducers

Cited by 17 publications

References 1 publication

SAW tomography-spatially resolved charge detection by SAW in semiconductor structures for imaging applications

SAW tomography-spatially resolved charge detection by SAW in semiconductor structures for imaging applications

Applications of surface acoustic and shallow bulk acoustic wave devices

Frequency Responses of Surface-Acoustic-Wave Filters with Two-Track Slanted Finger Interdigital Transducers

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