Ceramic dielectric waveguide duplexer

Abstract

The invention discloses a ceramic dielectric waveguide duplexer. The ceramic dielectric waveguide duplexer comprises a first resonant cavity, a second resonant cavity, a third resonant cavity, a fourth resonant cavity, a fifth resonant cavity, a common resonant cavity, a sixth resonant cavity, a seventh resonant cavity, an eighth resonant cavity, a ninth resonant cavity, a tenth resonant cavity and an eleventh resonant cavity which are connected in sequence, and the adjacent resonant cavities communicates through windows; except the common resonant cavity, blind holes with downward openings are upwards formed in the lower surfaces of the resonant cavities and are used for frequency tuning, and blind holes with upward openings are downwards formed in the upper surfaces of the first resonantcavity, the common resonant cavity and the eleventh resonant cavity and are used for feeding in port signals. The first to fifth resonant cavities and the common resonant cavity are used for realizing the first passband response of the duplexer, and the common resonant cavity and the sixth to eleventh resonant cavities are used for realizing the second passband response of the duplexer. Miniaturization and integrated design of the duplexer are realized by using the folding structure and the high-dielectric-constant ceramic resonant cavity, and the duplexer is easy to process, form, electroplate and debug in the later period.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, in particular to the field of filters, in particular to a ceramic dielectric waveguide duplexer. Background technique [0002] In the field of electronic communication, especially in navigation, radar and other applications, in order to improve the system’s transceiver capability, the antenna mostly adopts a phased array system or a multiple-input multiple-output (MIMO) system, which poses a challenge to the link performance of the system’s radio frequency channel. higher requirements. For example, the rapid development of technologies such as navigation satellite communication and personal mobile communication (especially 5G mobile communication) has raised the urgent demand for high sensitivity and transmission power of wireless receivers. The field of communication often requires the antenna to work in a full-duplex system, so the duplexer, as the first-level passive device of th...

AI Technical Summary

Problems solved by technology

However, based on the integrated design of the ceramic dielectric waveguide duplexer, the common port also uses a ceramic resonant cavity to excite two main modes with different frequency passbands, so the common resonant cavity (106) needs a wider frequency range and a smaller group delay

Moreover, in the design and debugging process of the three-port duplexer as an integrated design, the influence between the two frequency bands will be superimposed on each other through the common port, which greatly increases the difficulty of design and debugging.

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