A novel microwave microstrip surface acoustic wave filter with gigahertz band low-loss wide bandwidth for broad spectrum communication system

I. Tseng Tang, Fenq Lin Jenq, Jui Hong Horng, Mau Phon Houng, Yeong Her Wang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A novel GHz-band low-loss wide bandwidth microwave microstrip, surface acoustic wave (SAW) filter used for the spread spectrum communication system has been designed and fabricated. The 16-μm-input/output-interdigital-transducer (IDT) LiNbO3 61.00-MHz-SAW filter with microwave square open-loop resonators has an insertion loss of 3.987 dB. This device is also a 1 GHz microwave microstrip SAW filter with four coupled microstrip square open-loop resonators and two planar interdigital capacitors with S21 and S11, having bandwidths of -2.962 dB and -25.497 dB, respectively, and 800 MHz. It is speculated that the characteristics of these low-loss wide bandwidth (BW = 80%) microstrip SAW filters are influenced by the interaction between electromagnetic wave and piezoelectric SAW. To confirm this speculation, devices with the same design have been fabricated on 128°-rotated YX-cut LiNbO3, GaAs S-I and 9000 Å SiO2/Si substrates. Significant variations of performance are observed among these devices.

Original languageEnglish
Pages (from-to)2974-2977
Number of pages4
JournalJapanese Journal of Applied Physics
Volume41
Issue number5 A
DOIs
Publication statusPublished - 2002 May

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

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