A Complete LTspice Simulation Model for SAW Devices

Year 2024, Volume: 36 Issue: 1, 59 - 69, 25.03.2024

Alper Şişman

https://doi.org/10.7240/jeps.1304351

Abstract

A complete circuit model of Surface Acoustic Wave (SAW) devices with straight interdigital transducers is presented. This equivalent circuit can be implemented in LTspice and contains variable design characteristics that can be easily changed to see their effect on the electrical response of the final SAW device design. Later a two port Surface Acoustic Wave device with 13-finger-IDT electrodes is fabricated and its electrical characterization is examined using a vector network analyzer. The test results are then compared with the equivalent circuits’ simulation output results for the verification. The results show an acceptable agreement between the experimental and simulation results for a wide frequency range. This paper offers an easy method to create an equivalent LTSpice model to determine the electrical response of a SAW device before fabrication. The model can also be used to simulate the behaviour of the circuits containing SAW devices using LTSPICE tool.

Keywords

SAW Device, LTSpice model, SAW Filter, Equivalent circuit

SAW Cihazları için Bir LTspice Benzetim Modeli

Abstract

Bu çalışma ile, düz interdijital dönüştürücülere sahip Yüzey Akustik Dalgası (SAW) cihazlarının eksiksiz bir devre modeli sunulmaktadır. Bu eşdeğer devre LTspice kullanılarak uygulanabilir ve nihai SAW cihazı tasarımının elektriksel tepkisi ve devre üzerindeki etkilerini görmek için kullanılabilr. Önerilen model, SAW cihazı tasarım özelliklerinin kolaylıkla değiştirilmesine olanak sağlar. ÇAlışmada 13-parmak-IDT elektrodu içeren, iki portlu bir Yüzey Akustik Dalgası cihazı imal edilmiş ve bir vektör ağ analizörü kullanılarak elektriksel karakterizasyonu incelenmiştir. Test sonuçları daha sonra doğrulama için eşdeğer devrelerin simülasyon çıktı sonuçlarıyla karşılaştırılmıştır. Sonuçlar, geniş bir frekans aralığı için deneysel ve simülasyon sonuçları arasında kabul edilebilir bir uyum göstermektedir. Bu makale, üretimden önce bir SAW cihazının elektriksel tepkisini belirlemek için eşdeğer bir LTSpice modeli oluşturmak için kolay bir yöntem sunmaktadır. Ayrıca, modelin LTSPICE aracı kullanılarak SAW cihazları içeren devrelerin davranışını simüle etmek için de kullanım potansiyeli ortaya konulmuştur.

Keywords

SAW cihazı, LTSPICE modeli, SAW Filtresi, Eşdeğer Devre

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