Ultra high frequency bandpass filter with dielectric resonator mounted on microstrip ground by inductive post

摘要

A band pass filter in which a dielectric resonator in a transverse electromagnetic (TEM) mode is mounted on a ground plate of a microstrip line by using an inductive post, and the microstrip lines (10, 20, 30) The square dielectric resonator 40 and the thin wire 50 of the TEM mode can be used to obtain the characteristics of smaller volume and greater attenuation in the stop band than the bandpass filter using the conventional waveguide and planar structure. A bandpass filter having a wider bandwidth and a smaller insertion loss in a passband than a microstrip bandpass filter using a dielectric resonator (application number: Patent Application No. 53021 in 1995) can be configured.;The present invention relates to a band pass circuit for transmitting only a desired frequency band in communication or electrical energy transmission. The microstripline 10 uses the inductive post 50 of the dielectric resonator 40 in the TEM mode above 500 MHz. , 20, 30 has a structure mounted on the ground plate (20). It is composed of two structures: one dielectric resonator mounted on the ground plate using one inductive post (Figure 1) and two posts mounted two dielectric resonators on the ground plate (Figure 2). .