Coupling-of-Modes Analysis of Saw Devices

Plessky, V.P.; Koskela, J.

doi:10.1142/9789812811561_0001

Cited by 45 publications

(52 citation statements)

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“…For the high-performance SAW device design, precise and efficient simulations are needed [25][26][27][28]. COM modeling was used for the simulation about the various types of SAW devices owing to a highly flexible and an efficient approach.…”

Section: Coupling-of-modes (Com) Modeling For Optimized Device Paramementioning

confidence: 99%

“…(3). The SAW device was segmented into the IDT, open-grating reflector, shorted-grating reflector, and split-type reflector with loaded-impedance, and then cascaded with a cascading relationship to calculate their total response [28]. The element P 33 of the total P-matrix is the admittance of the SAW device, which is used to calculate the reflection coefficient S 11 by…”

Section: Coupling-of-modes (Com) Modeling For Optimized Device Paramementioning

confidence: 99%

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Wireless neural probes based on one-port SAW delay line and neural firing-dependent varicap diode

Jung

Lee

2015

Sensors and Actuators B: Chemical

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Section: Coupling-of-modes (Com) Modeling For Optimized Device Paramementioning

confidence: 99%

Section: Coupling-of-modes (Com) Modeling For Optimized Device Paramementioning

confidence: 99%

Wireless neural probes based on one-port SAW delay line and neural firing-dependent varicap diode

Jung

Lee

2015

Sensors and Actuators B: Chemical

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“…COM model provides an efficient and highly flexible approach for modeling various kinds of SAW devices [3]. For the SAW reflective delay line, COM model was used to analyze the IDT and reflectors respectively.…”

Section: Com Analysismentioning

confidence: 99%

“…R(x) and S(x) are slowly varying two acoustic wave amplitudes. Then, the 3 × 3 Pmatrix representation is used to present the solutions to the COM equations [3]. The L is transducer length.…”

Section: Com Analysis For Idtmentioning

confidence: 99%

“…From the analysis results, a 440 MHz SAW sensor on LiNbO 3 based on the reflective delay line with low loss and few spurious signals was experimentally developed for wireless pressure measurement. Shorted circuit grating was used as the reflectors to reduce the spurious signal, whereas low loss was implemented by SPUDT structure which is to enhance the generated signal in the forward direction but reduce the signal in the reverse direction using the distributed reflection sources in the IDTs [3]. Then, using the network analyzer, the device was wire- lessly characterized, and experimental results were well matched with simulated data.…”

Section: Introductionmentioning

confidence: 99%

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Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Wang

Lee

Woo

et al. 2007

Sensors and Actuators A: Physical

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Surface Acoustic Wave Devices

Morgan¹

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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A surface‐acoustic‐wave (SAW) device employs an acoustic wave guided along the surface of a piezoelectric crystal, in which the stresses and strains of the wave are coupled to electric fields. The wave has a low velocity, typically 3500 m/s, and propagates with low attenuation. These features enable compact low‐loss devices to be developed for electronics applications at frequencies up to several GHz. Arrays of metal electrodes are used to generate, detect or reflect the waves. This technology has enormous versatility because standard lithographic techniques can be used to fabricate almost arbitrary geometries. This article summarises the nature of surface waves and some relevant propagation effects, including diffraction. The interdigital transducer, used in all these devices for wave generation, is described. A survey of suitable materials is given, including quartz, lithium niobate and lithium tantalate. Transversal bandpass filters are weighted using apodisation or withdrawal weighting. They are widely used in TV receivers, as well as in professional equipment which calls for very high performance devices. For radar, SAW pulse compression filters perform a correlation operation, increasing the range capability. Other devices perform correlation for spread‐spectrum communication waveforms, an example being the SAW non‐linear convolver which is capable of instantaneous programmability. For mobile telephony there has been a strong demand for miniature low‐loss bandpass filters, and a wide variety of novel SAW devices have been developed. For example, impedance element filters give 1 dB loss at 900 MHz, with 30 MHz bandwidth and a package size of 2 × 2 mm 2 . For IF filtering in the CDMA mobile phone system, a modified type of transversal filter called the R‐SPUDT enables both low loss and small size to be obtained. For GSM IF circuits, transverse‐coupled resonator filters have been developed to give a very narrow bandwidth of 200 kHz. The article concludes with a superficial survey of the theory of these devices. Introduction Interdigital Transducers Propagation Effects Materials Basic SAW Filters Low‐Loss Bandpass Filters Leaky Surface Waves Analysis Methods

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Coupling-of-Modes Analysis of Saw Devices

Cited by 45 publications

References 0 publications

Wireless neural probes based on one-port SAW delay line and neural firing-dependent varicap diode

Wireless neural probes based on one-port SAW delay line and neural firing-dependent varicap diode

Optimal design on SAW sensor for wireless pressure measurement based on reflective delay line

Surface Acoustic Wave Devices

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