Abstract:The surface transverse wave (STW) filter with zero of first order temperature coefficient on quartz substrate is introduced in this paper. The high frequency narrow band filter with high outofband rejection has been fabricated,and two STW filters are cascaded to improve the outofband rejection performance.The measurement results show that the STW filter has center frequency 〖JP2〗of 1 219.4 MHz,insertion loss of 9.38 dB,-1 dB bandwidth of 0743 MHz,-3 dB bandwidth of 1.06 MHz,-40 dB bandwidth of 2.94 MHz,the group delay ripple of less than 〖JP2〗100 ns at offset of -100~100 kHz of center frequency, and the standing wave of less than 2 both at the input and output ends.