Dielectric waveguide filter with direct coupling and alternative cross-coupling

摘要

A dielectric waveguide filter comprising a block of dielectric material including a plurality of resonators defined by a plurality of slots defined in the block of dielectric material. The resonators are arranged on the block of dielectric material in one or more rows and columns. First and second RF signal input/output electrodes are defined on the block of dielectric material. A first direct RF signal transmission path for the transmission of an RF signal is defined by the first and second RF signal input/output electrodes and the plurality of resonators. In one embodiment, internal windows define a first direct RF signal transmission means and additional RF signal transmission means define alternate or cross-coupling paths for the transmission of the RF signal from resonators in one column to resonators in another column. In one embodiment, the filter is comprised of two separate blocks of dielectric material which have been coupled together.

主权项

1. A waveguide filter for the transmission of an RF signal comprising:
a first block of dielectric material including at least a first slot separating and thus defining a first plurality of resonators in the first block of dielectric material, the first block of dielectric material being covered with a layer of conductive material; a second block of dielectric material coupled to the first block of dielectric material, the second block of dielectric material including at least a second slot separating and thus defining a second plurality of resonators in the second block of dielectric material, the second block of dielectric material being covered with a layer of conductive material; a first RF signal input/output electrode defined on the first block of dielectric material defined by a first through-hole extending through a first step terminating in a first exterior surface spaced from the at least first slot defined in the first block of dielectric material; and a first direct RF signal transmission path defined by the combination of the first RF signal input/output electrode and the plurality of resonators in the first and second blocks of dielectric material, the first direct RF signal transmission path being defined in part by an internal window for transmitting the RF signal between one of the first plurality of resonators in the first block of dielectric material and one of the second plurality of resonators in the second block of dielectric material, the internal window being defined by respective first and second regions on the respective first and second blocks of dielectric material that are devoid of conductive material.