A novel S-band low-loss wide-bandwidth microwave microstrip, suiface acoustic wave (SAW) filter used in spread spectrum communication systems was designed and implemented. The 16 micron input/output interdigital transducer (IDT) on the 64°-rotated Y-cut LiNbO 3 69.0 MHz SAW filter, with microwave square open-loop resonators, has an insertion loss of 3.987 dB. This device is also a 2.5 GHz microwave microstrip SAW filter, with four cross-coupled microstrip square open-loop resonators and two planar interdigital capacitors, with an insertion loss as low as 2.41 dB and a 3 dB bandwidth as wide as 450 MHz (18 percent). The characteristics of these low-loss wide-bandwidth microwave microstrip SAW filters are influenced by the interaction between electromagnetic waves and the piezoelectric SAW.
|出版狀態||Published - 2009|
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering