Dielectric Waveguide Filter with Direct Coupling and Alternative Cross-Coupling

摘要

A waveguide filter comprising a base block of dielectric material defining at least first and second resonators and a bridge block seated on top of the base block and defining at least a third resonator. In one embodiment, the base block comprises first and second base blocks that have been coupled together in an end to end relationship. An external transmission line or an interior RF signal transmission window or an RF signal transmission bridge provides a cross-coupling RF signal transmission path between the first and second resonators. At least first and second interior RF signal transmission windows provide a direct RF signal transmission path between the first and third resonators and the second and third resonators respectively.

主权项

1. A waveguide filter adapted for transmission of an RF signal and comprising:
a first block of dielectric material covered with a first layer of conductive material and defining a first resonator and a first path for the transmission of the RF signal; a second block of dielectric material covered with a second layer of conductive material and defining a second resonator and a second path for the transmission of the RF signal; a bridge block of dielectric material covered with a third layer of conductive material and defining a third resonator and a third path for transmission of the RF signal, the first and second blocks and the bridge block being coupled to each other in a relationship wherein the bridge block bridges the first and second blocks; a first interior RF signal transmission window defined between the first block and the bridge block and defining a fourth path for the transmission of the RF signal between the first block and the bridge block; a second interior RF signal transmission window defined between the second block and the bridge block and defining a fifth path for the transmission of the RF signal between the second block and the bridge block; and wherein the fourth and fifth paths for the transmission of the RF signal are normal to the first, second, and third paths for the transmission of the RF signal.