Electromechanical band filter

Claim 1

AN ELECTROMECHANICAL BAND FILTER COMPRISING A COMTINUOUS MECHANICAL TRANSMISSION LINE, AT LEAST ONE MECHANICAL RESONATOR CONNECTED TO SAID LINE, A MECHANICAL REACTANCE IN THE FORM OF A SIDEBRANCH CONNECTED TO SAID TRANSMISSION LINE, SAID RESONATOR AND SAID SIDEBRANCH EACH HAVING OPPOSITELY DISPOSED ENDS, AND EACH OPERATIVELY ATTACHED AT ONE OF SUCH ENDS TO THE MECHANICAL TRANSMISSION LINE, AND THE RESPECTIVE OPPOSITE ENDS BEING FREE, SUCH ATTACHMENTS FALLING IN A COMMON CROSS-SECTIONAL PLANE OF SAID MECHANICAL TRANSMISSION LINE, SAID RESONATOR HAVING SUCH PHYSICAL DIMENSIONS WITH RESPECT TO THE PARTICULAR FROM OF OSCILLATION INVOLVED THAT IS ACTS AS A SINGLE SERIES RESONANCE CIRCUIT TO GENERATE AN ATTENUATION PEAK AT A FREQUENCY FALLING IN THE BLOCKING RANGE OF THE FILTER, SAID SAID BRANCH HAVING SUCH LENGTH AND CROSS-SECTIONAL DIMENSIONS, WHICH ARE DIFFERENT FROM THE CORRESPONDING LENGTH AND CROSS-SECTIONAL DIMENSIONS OF THE RESONATOR, THAT IT ACTS AS A PARALLEL RESONANCE CIRCUIT AND WITH THE REACTANCE COMPONENT OF THE MECHANICAL RESONATOR GENERATES A MATCHING POINT IN THE FREQUENCY CHARACTERISTICS OF THE FILTER AT A FREQUENCY FALLING IN THE PASS RANGE THEREOF.