CN203521565U

CN203521565U - TM die medium filter

Info

Publication number: CN203521565U
Application number: CN201320582087.9U
Authority: CN
Inventors: 孙希
Original assignee: KUNSHAN HOPEFULTECH ELECTRONIC Co Ltd
Current assignee: KUNSHAN HOPEFULTECH ELECTRONIC Co Ltd
Priority date: 2013-09-21
Filing date: 2013-09-21
Publication date: 2014-04-02
Anticipated expiration: 2023-09-21

Abstract

The utility model provides a TM die medium filter, and a first groove is arranged on the upper surface of a cover plate. The lower surface of the cover plate is provided with an upper grounding loop corresponding to the first groove, and the upper grounding loop contacts the upper end of a medium resonator. With a first groove, the cover plate easily deforms, thereby providing a sufficient pressure for the medium resonator. A lower grounding loop is arranged on the bottom of an accommodating chamber, and the lower grounding loop contacts the lower end of the medium resonator. The lower grounding loop provides appropriate contact area for the medium resonator and ensures the flatness of the medium resonator, and good contact between the cover plate, the medium resonator and the chamber. Lower insertion loss and higher intermodulation indexes are ensured, when the TM die medium filter minimizes the size of products.

Description

A kind of TM mould dielectric filter

Technical field

The utility model relates to wireless communication field, relates in particular to a kind of TM mould dielectric filter.

Background technology

TM mould dielectric filter, (TM Transverse Magnetic, permanent magnetic wave) be a kind ofly to utilize low-loss, high-k, frequency-temperature coefficient and the thermal coefficient of expansion of dielectric material little, can bear the features such as high power and design and produce, by the longitudinal plural serial stage of several elongated resonators or trapezoidal circuit in parallel, formed; Be characterized in that little, the resistance to power of insertion loss is good, narrow bandwidth.

And along with base station equipment is towards miniaturization, low-power consumption future development, the inner filter using also requires less volume and lower loss, conventional metal filter cannot also can reduce when volume reduces in loss; Because ceramic material has high dielectric constant and Qf value, to use ceramic material to make dielectric resonator and just can obtain higher Q value (quality factor), Q value is to weigh the major parameter of inductance component.But, guarantee that TM mould dielectric filter, reducing to obtain under the condition of small product size than the lower Insertion Loss of metal filter and better intermodulation index, is technical problem to be solved in the utility model.

Utility model content

The purpose of this utility model is to overcome the defect of prior art, provides that a kind of Insertion Loss is lower, the good TM mould of intermodulation index dielectric filter.

The utility model is achieved in that a kind of TM mould dielectric filter, comprise and there is cavity, the cover plate of cavity volume and be arranged at a plurality of dielectric resonators in described cavity volume, between two adjacent described dielectric resonators, be provided with for cross-linked vertical rod, described cover plate is arranged on described cavity, described cover plate upper surface is provided with the first groove, described cover plate lower surface is provided with the upper ground loop corresponding with described the first groove, and described upper ground loop contacts described dielectric resonator upper end; Described cavity volume bottom is provided with lower ground loop, and described lower ground loop contacts described dielectric resonator lower end.

Further, described cavity volume bottom is also provided with one second groove and is arranged on the plastic supporting pieces in described the second groove, described vertical rod and described plastic supporting pieces interference fit.

Further, described dielectric resonator is shaped as hollow cylinder.

The utility model provides a kind of TM mould dielectric filter, by cover plate upper surface, is provided with the first groove, and cover plate lower surface is provided with the upper ground loop corresponding with the first groove, upper ground loop contact medium resonator upper end; The design of the first groove makes cover plate be easier to produce distortion, thereby provides an enough large pressure to dielectric resonator; Cavity volume bottom is provided with lower ground loop, lower ground loop contact medium resonator lower end, and lower ground loop can provide the contact area that dielectric resonator is suitable and guarantee its evenness; Guarantee good contact between cover plate, dielectric resonator and cavity, made TM mould dielectric filter reduce to have under the condition of small product size lower Insertion Loss and better intermodulation index.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The TM mould dielectric filter structural representation that Fig. 1 provides for the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.

As Fig. 1, the utility model embodiment provides a kind of TM mould dielectric filter 1, comprise and there is cavity 11, the cover plate 12 of cavity volume 111 and be arranged at a plurality of dielectric resonators 13 in described cavity volume 111, described dielectric resonator 13 be shaped as hollow cylinder; Between two adjacent described dielectric resonators 13, be provided with for cross-linked vertical rod 14, described cover plate 12 is arranged on described cavity 11, described cover plate 12 upper surfaces are provided with the first groove 121, described cover plate 12 lower surfaces are provided with the upper ground loop 15 corresponding with described the first groove 121, described upper ground loop 15 contact described dielectric resonator 13 upper ends; The design of the first groove 121 makes cover plate 12 be easier to produce distortion, thereby an enough large pressure is provided to dielectric resonator 13; Described cavity volume 111 bottoms are provided with lower ground loop 16, described lower ground loop 16 contact described dielectric resonator 13 lower ends.Lower ground loop 16 can provide the contact area that dielectric resonator 13 is suitable and guarantee its evenness; Guarantee good contact between cover plate 12, dielectric resonator 13 and cavity 11, made TM mould dielectric filter 1 reduce to have under the condition of small product size lower Insertion Loss and better intermodulation index.

Further, as Fig. 1, described cavity volume 111 bottoms are also provided with one second groove 112 and are arranged on the plastic supporting pieces 17 in described the second groove 112, described plastic supporting pieces 17 adopts integrally moulded, main support, the fixation of rising, described vertical rod 14 and described plastic supporting pieces 17 interference fit, guarantee that described vertical rod 14 installations are firm, meanwhile, be also convenient to described vertical rod 14 dismountings.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims

1. a TM mould dielectric filter, it is characterized in that, comprise and there is cavity, the cover plate of cavity volume and be arranged at a plurality of dielectric resonators in described cavity volume, between two adjacent described dielectric resonators, be provided with for cross-linked vertical rod, described cover plate is arranged on described cavity, described cover plate upper surface is provided with the first groove, and described cover plate lower surface is provided with the upper ground loop corresponding with described the first groove, and described upper ground loop contacts described dielectric resonator upper end; Described cavity volume bottom is provided with lower ground loop, and described lower ground loop contacts described dielectric resonator lower end.

2. TM mould dielectric filter as claimed in claim 1, is characterized in that: described cavity volume bottom is also provided with one second groove and is arranged on the plastic supporting pieces in described the second groove, described vertical rod and described plastic supporting pieces interference fit.

3. TM mould dielectric filter as claimed in claim 1, is characterized in that: described dielectric resonator be shaped as hollow cylinder.