CN205723897U - A kind of wideband cavity two power divider of exposure transmission - Google Patents

Abstract

The utility model relates to wideband cavity two power divider of a kind of exposure transmission, including an outer chamber and the inner wire resonant rod being embedded in this outer chamber, inner wire resonant rod coaxially mates with outer chamber；Inner wire resonant rod one end is connected with an input, and the inner wire resonant rod other end is connected with one first output and one second output respectively.Cavity two power divider of a kind of exposure transmission that the utility model is proposed, provide a kind of overall structure compact, length is shorter, processing is relatively easy to, volume and the cavity power divider that weight is less, production cost is relatively low, and the length solving the wideband cavity power divider that prior art is brought is longer, homogeneity of product is poor, difficulty of processing is relatively big, the inconvenience problems such as production cost is higher, and volume and weight are all bigger.

Description

A kind of wideband cavity two power divider of exposure transmission

Technical field

The utility model relates to cellular mobile communication field, particularly relates to the broadband of a kind of exposure transmission Cavity two power divider.

Background technology

At present, it is by multistage quarter-wave impedance that common on market wideband cavity power divides device to join mostly Converter cascade is constituted, but longer by the cavity power divider length of the method production and processing, needs Consume more raw material, cause production cost higher, again because inner wire is stepped impedance transformation, The production and processing difficulty causing inner wire is relatively big, reduces production efficiency, if generally to realize The covering of 800-2700MHz frequency range, needs the cascade of Pyatyi quarter wavelength impedance transducer to constitute, product Total length, typically at more than 230mm, significantly wastes material, increases production cost.

Content of the invention

The purpose of this utility model is wideband cavity two power divider providing a kind of exposure to transmit, To overcome defect present in prior art.

For achieving the above object, the technical solution of the utility model is: the broadband chamber of a kind of exposure transmission Body two power divider a, comprising: outer chamber and the inner wire resonant rod being embedded in this outer chamber；Described Inner wire resonant rod one end is as resonant rod input, and is connected with an input contact pin, described inner wire resonance The bar other end as resonant rod output, and respectively with one first output contact pin and one second output contact pin It is connected.

In the utility model one embodiment, described inner wire resonant rod coaxially mates with described outer chamber, and is Coaxial resonant cavity.

In the utility model one embodiment, described outer chamber one end offers and coaxially connects for being embedded an input Connect the first through hole of device, and this input coaxial connector is connected with described input contact pin；Described outer chamber is another Two sides, one end offer respectively the second through hole for being embedded one first output coaxial connector and for It is embedded the third through-hole of one second output coaxial connector, described first output coaxial connector and described the One output contact pin is connected, and described second output coaxial connector is connected with described second output contact pin.

Compared to prior art, the utility model has the advantages that 1) the utility model proposed Cavity power divider frequency band is wider, it is possible to achieve the covering of more wide-band, and the index such as standing wave, Insertion Loss is more preferable. (2) power splitter structure that the utility model is proposed is simple, metallic inner conductor uses taper processing, will not The processing difficulties problem existing for stepped inner wire constituting as quarter wavelength impedance transducer cascade, greatly Reducing greatly difficulty of processing, machining accuracy is readily obtained satisfied, improves production efficiency, has saved time cost And cost of labor.(3) metallic inner conductor length shortens, and volume and weight all have reduction, reduce product material Cost, production cost, this cavity power divider is total compared with the cavity power divider commonly using in the market Contraction in length more than 30%.(4) gradual change transmission is used also to reduce relative to the sensitiveness of every one-level converter, Therefore the continuity of device is stronger.(5) homogeneity of product is preferable, can preferably ensure when producing in enormous quantities The uniformity of device index.(6) small product size reduces, the mitigation of weight, also more convenient for project installation.

Brief description

Fig. 1 is the utility model two power divider inner wire resonant rod structural representation.

Fig. 2 is the utility model two power divider outer chamber structural representation.

Fig. 3 is two power divider outer chambers and inner wire resonant rod connection diagram in the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawings, the technical solution of the utility model is specifically described.

Wideband cavity two power divider of a kind of exposure of the present utility model transmission, such as Fig. 1～Fig. 3 Shown in, comprising: an outer chamber 8 and the inner wire resonant rod 4 being embedded in this outer chamber 8；Lead in described Body resonant rod 4 one end is as resonant rod input, and is connected with an input contact pin 1, described inner wire resonance Bar 4 other end as resonant rod input, and respectively with one first output contact pin 2 and one second output Contact pin 3 is connected.As it is shown in figure 1, the first output contact pin 2 and one second output contact pin 3 are connected respectively Vertically fix with inner wire resonant rod 4 output and be connected, and the first output contact pin 2 and the second output are inserted Pin 3 specification is consistent.

Further, in the present embodiment, described inner wire resonant rod 4 coaxially mates with described outer chamber 8, And be coaxial resonant cavity.Outer chamber 8 uses metal material, and resonant rod 4 uses metal material, and is solid interior Conductor.

Further, in the present embodiment, described outer chamber 8 one end offers for being embedded an input coaxial First through hole of connector 5, and this input coaxial connector 5 is connected with described input contact pin 1；Described Outer chamber other end two sides offer respectively for be embedded one first output coaxial connector 6 second lead to Hole and for being embedded the third through-hole of one second output coaxial connector 7, described first output coaxially connects Connecing device 6 to be connected with described first output contact pin 2, described second output coaxial connector 7 is with described second Output contact pin 3 is connected.

Further, in the present embodiment, the diameter of the input/output terminal of inner wire resonant rod is according to finger Impedance computation formula during number tapered transmission lines is theoretical obtains its input characteristic impedance and the resistance of terminal load characteristic After Kang conversion and come；The length of inner wire is to calculate public affairs according to exposure transmission theory Exponential line length Formula is calculated.Specific as follows: according to the calculating of exponential line length L in exposure transmission theory Formula isWherein,For reflectance factor, λ is wavelength,

From formula, when impedance ratio R gives (two work(divide R=2, and three work(divide R=3, and four work(divide R=4), refer to Number line is longer, and reflectance factor T is less, and i.e. the characteristic variations of exponential line is slower.Therefore, giving When impedance ratio R, reflectance factor, the length of exponential line not arbitrary value can meet, and must at least take One minimum length, as long as length is more than this value, then can meet requirement, therefore when broadband operation, as long as with Low-limit frequency (or long wavelength) is that standard chooses exponential line length, then all can meet coupling to all other frequency Require, i.e.C is light spread speed in a vacuum, f be frequency range in low-limit frequency.

Then the computing formula further according to the input impedance Zer that can obtain exponential line in exposure transmission theory ForWherein Zoo is characteristic impedance when initial, and Zl is for eventually Hold connect load,K is exponential line phase constant, can obtain inner wire according to formula Input characteristic impedance and outlet terminal characteristic impedance are it is known that after characteristic impedance, hinder further according to acquired input characteristics Anti-and outlet terminal characteristic impedance calculates input characteristic impedance and the resistance of outlet terminal characteristic in the following way Anti-corresponding size, namely input diameter and output diameter:

$Z0=\frac{60}{\sqrt{{\mathrm{\Σ}}_r}}ln\frac{b}{a}$

Wherein, Σ_rFor dielectric constant of air, b is coaxial exocoel body cavity internal diameter, and a is resonant rod external diameter.

In Practical Calculation matching process, in addition it is also necessary to the artificial debugging especially by the later stage is slightly changed, obtain with The best-of-breed technology index of actual environment coupling, the diameter of the final length determining inner wire and input/output terminal is big Little.

It is above preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model, institute When the function producing is without departing from the scope of technical solutions of the utility model, belong to protection of the present utility model Scope.

Claims (3)

1. wideband cavity two power divider of an exposure transmission, it is characterised in that include: an outer chamber and the inner wire resonant rod being embedded in this outer chamber；Described inner wire resonant rod one end is as resonant rod input, and is connected with an input contact pin, and the described inner wire resonant rod other end is as resonant rod output, and is connected with one first output contact pin and one second output contact pin respectively.

2. wideband cavity two power divider of a kind of exposure according to claim 1 transmission, it is characterised in that described inner wire resonant rod coaxially mates with described outer chamber, and be coaxial resonant cavity.

3. wideband cavity two power divider of a kind of exposure according to claim 1 transmission, it is characterized in that, described outer chamber one end offers the first through hole for being embedded an input coaxial connector, and this input coaxial connector is connected with described input contact pin；Described outer chamber other end two sides offer the second through hole for being embedded one first output coaxial connector and respectively for being embedded the third through-hole of one second output coaxial connector, described first output coaxial connector is connected with described first output contact pin, and described second output coaxial connector is connected with described second output contact pin.