A novel integrable surface acoustic wave notch filter
| Autor: | Han-Jan Chen, Mau-Phon Houng, I-Tseng Tang, Yeong-Her Wang |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Interdigital transducer Acoustics Surface acoustic wave Lithium niobate Bandwidth (signal processing) Condensed Matter Physics Band-stop filter Capacitance Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Materials Chemistry Insertion loss Electrical and Electronic Engineering Center frequency |
| Zdroj: | Solid-State Electronics. 47:2063-2066 |
| ISSN: | 0038-1101 |
| DOI: | 10.1016/s0038-1101(03)00243-0 |
| Popis: | Although surface acoustic wave (SAW) notch filter was investigated in the past, the structures of these devices often needed the extra lumped-element such as resistance R , capacitance C , and inductance L so that the devices are complex and integrated hardly. From this, we offer a simple kind of the planar structure to the novel SAW notch filters that have smaller size and can be fabricated easily. We adopt the SAW and the interdigital transducer’s (IDT’s) theory to fabricate the SAW notch filter. In this paper, we use an IDT finger width 8 μm with conventional photolithography process, lift-off technique, and IDT electrode to fabricate on 128° rotated YX-cut lithium niobate (LiNbO 3 ). Finally, we get the frequency responses of the novel SAW notch filter with the center frequency 113.4 MHz, the 3 dB bandwidth 0.36%, and the insertion loss S 21 =−10.583 dB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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