A dual-mode dual-passband dielectric filter power splitter capable of generating out-of-band zeros

Abstract

A dual-mode dual-passband dielectric filter power divider capable of generating out-of-band zeros, comprising cascaded first and second dual-mode dielectric resonators, a first excitation structure coupled to the first dual-mode dielectric resonator, and The second and third excitation structures coupled by the second dual-mode dielectric resonator, the first excitation structure is a linear feeder, the second and third excitation structures are zigzag feeders, and the second and third excitation structures are separately located in the second dual mode dielectric resonator on both sides of the diagonal plane. The second and third excitation structures of the dual-mode dual-passband dielectric filter power divider of the present invention are broken-line feeders; by adjusting the first feeders of the second and third excitation structures, the connection between the two excitation structures and the first excitation structure is realized respectively. cross-coupling to generate out-of-band zero points; by adjusting the third feeder lines of the second and third excitation structures respectively to realize the main coupling between the two excitation structures and the second dual-mode dielectric resonator, the two output signals can be realized at the The first passband and the second passband have different power division ratios.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a dual-mode, double-passband dielectric filter power divider capable of generating out-of-band zero points, and in particular to a feed structure capable of generating out-of-band zero points. Background technique [0002] Communication systems need to obtain useful signals while shielding noise, so a large number of filter circuits are used. The out-of-band transmission zero of the filter passband is beneficial to improve the selectivity of the passband, so how to conveniently and quickly generate the out-of-band zero is an important indicator of academic and industrial research. [0003] For a cavity filter circuit, in order to generate a zero point in the amplitude-frequency response, it is often necessary to add an additional resonant cavity or add an additional coupling probe, which will eventually lead to a significant increase in design and processing costs, a...

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Problems solved by technology

If different power distribution can be achieved in the two passbands, the dual-passband filter splitter is more versatile in applications, but such designs are rarely reported

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