Microwave SAW bandpass filters for spacecraft applications

Shinonaga, Hideyuki; Ito, Yasuhiko

doi:10.1109/22.141342

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Furthermore, when k, I, m are 0, Eqs. (14) to (16) may be written as (19) n4acc.n = M D C C Next, using Eqs. (6) through (19), we calculate the reliability Pi, at the design life of the satellite and the mass Mi, of each portion by increasing k, I , m from 0.…”

Section: Determination Methodsmentioning

confidence: 99%

“…Because the SAW filter design is based on digital filter theory [13, 141, a linear-phase finite impulse response (FIR) filter can be obtained. As a result, if the outputs of the SAW filters that are adjacent on the frequency axis are combined, the transition bands between filters can be combined such that the bands become part of the passband [16,171. This subchannel combining function not only reduces the bandwidth loss by the guard bands, but also makes it possible to transmit a signal wave that has a wider bandwidth than the passband of the SAW filter.…”

Section: Introductionmentioning

confidence: 99%

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SAW filter matrix for SS/FDMA system

Shinonaga

Ito

1994

Electron. Comm. Jpn. Pt. I

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The configuration and function of a surface acoustic wave (SAW) filter matrix used on board a satellite to implement a subchannel switched FDMA (SS/FDMA) system is described. The function and configuration of the SAW filter matrix (SFM) are described. Conditions imposed on the amplitude and phase of two adjacent subchannels to provide a broad channel by combining the outputs of the subchannels are investigated. Electrical and transmission characteristics of an SAW filter matrix used in four-beam SS/FDMA system with a subchannelcombining function are presented, demonstrating its technical feasibility.When implementing an SFM, it is important that the devices used for a satellite-based SS/FDMA router are sufficiently reliable for the design life of the satellite. A methodology is shown that gives a redundant configuration with the lightest mass and that achieves the targeted reliability. Example calculations for a four-beam SS/FDMA router are given.

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Section: Determination Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

SAW filter matrix for SS/FDMA system

Shinonaga

Ito

1994

Electron. Comm. Jpn. Pt. I

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“…The frequency response of this weighting function is given by (2) where f is the frequency. Substituting z for exp(j2fl), Eq.…”

Section: Decomposition Of Weighting Functionmentioning

confidence: 99%

“…SAW filters have been used for satellite communications because of small size, light weight, low power consumption and high reliability [l], [2]. In order to use limited frequency bandwidths eficiently in satellite applications, filters with narrow transition bandwidths and high attenuation in rejection bands are desirable.…”

Section: Introductionmentioning

confidence: 99%

A narrow transition bandwidth SAW filter using withdrawal weighting with decomposed weighting functions

Nagatsuka¹,

Misu²,

Kimura³

et al. 1993

1993 Proceedings IEEE Ultrasonics Symposium

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Thousands of taps with small weights are required for IDTs to achieve narrow transition bandwidths in SAW filters used for satellite applications. In this paper, withdrawal weighting for IDTs is employed to eliminate difiaction problems encountered in overlap weighting. To obtain a good approximation, an original weighting function is decomposed into two functions such that number of small weights decreases. In the decomposition procedure, the so called zero separation method is applied to the sampled original weighting function, because it is difficult to calculate zeros of thousands order polynomial. The decomposed functions are interpolated, and then approximated by withdrawal weighting. The resultant two weighting functions are applied to input and output IDTs respectively.

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“…There are several new emerging applications for acoustic wave devices as sensors: automotive, medical, biological technology, industrial, commercial applications and especially in telecommunication (Drafts 2001). In which, it can serve as SAW correlator (Brocato et al 2006;Shinonaga and Ito 1992;Estrick and Gordon 1982), zero-power radio receiver, SAW filters and signal processing (Horine 1990;Ananasso 1989), passive remote sensing (Enguang and Guanping 1997;Buff et al 1998), nanopump for handling droplets in biological applications (Renaudin et al 2006), chemical detector (Wohltjen et al 1987;Milner 2005), biochips (Blaess et al 2005). Acoustic wave sensors are competitively priced, inherently rugged, very sensitive, and intrinsically reliable; some are also capable of being passively and wirelessly interrogated (no sensor power source required) (Bill Drafts 2001).…”

Section: Introductionmentioning

confidence: 99%

Coupling coefficient determination based on simulation and experiment for ST-Cut quartz saw delay-line response

Hsu

2007

Microsyst Technol

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This paper used the theoretical calculation to simulate the response of surface acoustic wave (SAW) delay-line on quartz substrate and then compared to the experimental results. The coupling coefficients affected by operation frequency as well as aperture length were built up by experimental data analysis. Based on the experimental values of these two parameters, the device-coupling coefficient was defined. This method is new and we has not found in other document. In addition, it improves the simulation results and helps the analysis process more comprehensive. This study developed ST-cut quartz SAW delay-lines with gold inter-digital transducer (IDT) operating at 39.5 and 78.9 MHz corresponding to 80 and 40 lm of the wavelength. The differences of aperture length in IDT designs were investigated to help understand the effects of this parameter on SAW sensor response. The maximum error of operating frequency is 1%; of insertion loss is 4.25 and 3.13% for bandwidth. The larger of the insertion loss error is expected owing to the result of mathematical approximation and the quality of quartz substrate. The simulation results agree with the experimental results shows that the simulation method can apply to quartz-based SAW delay-line as well as for other material based SAW delay-line applications. The results help understand more about the parameters which effect the insertion loss, operating frequency and bandwidth. It should be very useful for IDT design in specific, SAW sensor and SAW filter design in general.

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Microwave SAW bandpass filters for spacecraft applications

Cited by 6 publications

References 14 publications

SAW filter matrix for SS/FDMA system

SAW filter matrix for SS/FDMA system

A narrow transition bandwidth SAW filter using withdrawal weighting with decomposed weighting functions

Coupling coefficient determination based on simulation and experiment for ST-Cut quartz saw delay-line response

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