CN202259648U - Electromagnetic super-structure, packaging structure, and dual-band power divider with electromagnetic super-structure - Google Patents

Abstract

The utility model relates to an electromagnetic super-structure, in particular to a folded resonant electromagnetic super-structure with a folded main transmission line and a folded strip line type complementary open-loop resonator. The utility model also relates to a packaging structure of the electromagnetic super-structure and a dual-band power divider with the electromagnetic super-structure. The dual-band power divider comprises a first port, a second port and a third port, wherein the first port is respectively connected with the second port and the third port through a branch arm circuit; and the branch arm circuit is the electromagnetic super-structure. By adoption of the electromagnetic super-structure, the packaging structure and the dual-band power divider, because the electromagnetic super-structure is the folded resonant electromagnetic super-structure and the branch arm circuit of the dual-band power divider is the electromagnetic super-structure, the appearance size of the dual-band power divider is greatly reduced to be one third of that of the conventional product; and a requirement for a space of the dual-band power divider is reduced, and the application range of the dual-band power divider is expanded. The utility model has the advantages of simple structure and low cost.

Description

Electromagnetism superstructure, encapsulating structure and two-band power splitter with electromagnetism superstructure

Technical field

The utility model relates to technical field of micro communication, and particularly the power splitter technical field specifically is meant a kind of electromagnetism superstructure and the two-band power splitter with this electromagnetism superstructure.

Background technology

Recent years, radio communication undergoes an unusual development rapidly, and various wireless communication standard (like GSM, CDMA, WIFI, WLAN etc.) gets the Green Light and drops into application.For practicing thrift cost, satisfy user's demand, often need on a terminal equipment, realize multiple function, a plurality of band transmissions.Therefore, the demand to the microwave of double frequency or multifrequency or radio-frequency devices is more and more stronger.Simultaneously, along with integrated improving constantly, also more and more stricter to the requirement of size and weight, the microwave of miniaturization compact or radio-frequency devices become development trend from now on.The Wilkinson power splitter is a requisite device in the radio communication; Its major function is exactly that one road input signal demultiplexing is exported; Simultaneously can realize that the multichannel input signal synthesizes one road signal, and guarantee the isolation between the multichannel input, for satisfying growing wireless communication needs.

Ultra material of electromagnetism or structure are also referred to as magnetoelectric composites, are meant those artificial electromagnetic material or structures that generates, and a lot of electromagnetic propertys that these materials and structural table reveal are in the general material that generates naturally, can't obtain.Since calendar year 2001 the U.S. and Britain scientist first verification experimental verification after the existence of LHM, ultra material of electromagnetism or structure become field scientists' such as countries in the world physics, chemistry, material, engineering research focus.Ultra material of the electromagnetism of broad sense or structure comprise wide range, like electromagnetism/photonic bandgap material (EBG/PBG), and plasma structure, LHM (LHM), frequency-selective surfaces (FSS), artificial magnetic conductor (AMC) etc.Owing to be artificial preparation, so a lot of electromagnetic propertys of ultra material of electromagnetism or structure can Artificial Control, like effective dielectric constant, equivalent permeability, phase velocity etc.These advantages of the ultra material of electromagnetism make it show great using value in optical communication, microwave or field of radio frequency communication.Than traditional devices, the new device performance that adopts the ultra material of electromagnetism to manufacture and design is more excellent, and size is littler, is highly suitable for following wireless communications application.

The electromagnetism superstructure is divided into two kinds of disresonance type resonant formulas, and characteristics are respectively arranged.From 2003 so far, on a plurality of well-known periodicals, a plurality of research groups have reported the achievement of utilizing disresonance type electromagnetism superstructure design double frequency microwave radio device (comprising double frequency Wilkinson power splitter), comprise " I.H.Lin; M.D.Vincentis, C.Caloz, and T.Itoh, ' Arbitrary dual-band components using composite right/left-handed transmission lines; ' IEEE Trans.Microwave.Theory Tech., vol.52, no.4, pp.1142-1149; Apr, 2004 " and " X.Q.Li, R.P.Lin, X.M.Yang; J.X.Chen, X.X.Yin, Q.Cheng, and T.J.Cui; ' Arbitrarily dual-band components using simplified structures of conventional CRLH TLs, ' IEEE Trans Microwave, Theory Tech., vol.54; No.7, pp.1142-1149, Jul, 2004 ".But,, increased manufacturing cost and influenced uniformity in product performance because disresonance type electromagnetism superstructure needs plated-through hole and welding.Than disresonance type electromagnetism superstructure, the ultra material of resonant mode electromagnetism has been introduced open-loop resonator or complementary open-loop resonator, though bandwidth is narrower, does not need plated-through hole, so manufacturing cost reduces greatly and can keep good consistency.

But existing resonant mode power splitter, particularly two-band power splitter, because the restriction of its electromagnetism superstructure that adopts; Its size is bigger usually; This has increased the overall dimension of this type of power splitter, the use of power splitter has been proposed higher space requirement, thereby greatly limited its scope of application.

The utility model content

The purpose of the utility model is to have overcome above-mentioned shortcoming of the prior art; Provide a kind of effective minimizing to adopt the overall dimension of the resonance power splitter of electromagnetism superstructure; Thereby reduce the requirement of power splitter for the application space; Significantly increase the scope of application of power splitter, and simple in structure, electromagnetism superstructure with low cost and two-band power splitter with this electromagnetism superstructure.

In order to realize above-mentioned purpose, the electromagnetism superstructure of the utility model has following formation:

The main feature of this electromagnetism superstructure is; It is folding resonant mode electromagnetism superstructure, and described folding resonant mode electromagnetism superstructure has the complementary open-loop resonator of folding band line style of the folding main transmission line of the one side that is arranged at a pcb board and the another side that is arranged at described pcb board.

In this electromagnetism superstructure, described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

The utility model also provides a kind of encapsulating structure of described electromagnetism superstructure; This encapsulating structure comprises a can; Described electromagnetism superstructure is arranged in the described can; The one side that has the complementary open-loop resonator of folding band line style on the described pcb board connects described can bottom; Described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position, and described can bottom is to offer groove on the corresponding position of the complementary open-loop resonator of described band line style.The degree of depth of this groove is not less than 5 millimeters.

The utility model also provides a kind of two-band power splitter with described electromagnetism superstructure; Described two-band power splitter comprises first port, second port and the 3rd port; Described first port connects described second port and the 3rd port through a support arm circuit respectively; It is characterized in that described support arm circuit is described electromagnetism superstructure.Described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

The two-band power splitter that has adopted electromagnetism superstructure, the encapsulating structure of this utility model and had this electromagnetism superstructure; Because its electromagnetism superstructure is the folding resonant mode electromagnetism superstructure with folding main transmission line and the complementary open-loop resonator of the band line style that folds; The support arm circuit of its this two-band power splitter is described electromagnetism superstructure; Feasible overall dimension with two-band power splitter of this electromagnetism superstructure significantly is reduced into 1/3 of existing product; Thereby reduce the requirement of power splitter for the application space; Increase the scope of application of power splitter, and the electromagnetism superstructure of the utility model and to have a two-band power divider structure of this electromagnetism superstructure simple, with low cost.

Description of drawings

Fig. 1 is the folding main transmission line structural representation of the electromagnetism superstructure of the utility model.

Fig. 2 is the structural representation of the complementary open-loop resonator of folding band line style of the electromagnetism superstructure of the utility model.

Fig. 3 is the encapsulating structure sketch map of the electromagnetism superstructure of the utility model.

Fig. 4 is the equivalent circuit diagram of the electromagnetism superstructure of the utility model.

Fig. 5 works in the equivalent circuit diagram of first frequency range for the two-band power splitter with electromagnetism superstructure of the utility model.

Fig. 6 works in the equivalent circuit diagram of second frequency range for the two-band power splitter with electromagnetism superstructure of the utility model.

Fig. 7 is the Facad structure sketch map of the two-band power splitter with electromagnetism superstructure of the utility model.

Fig. 8 is the structure sketch map of the two-band power splitter with electromagnetism superstructure of the utility model.

Fig. 9 is the insertion loss S21 sketch map of second port of the two-band power splitter with electromagnetism superstructure of the utility model.

Figure 10 is the insertion loss S31 sketch map of the 3rd port of the two-band power splitter with electromagnetism superstructure of the utility model.

Figure 11 is the return loss S11 sketch map of first port of the two-band power splitter with electromagnetism superstructure of the utility model.

Figure 12 is the return loss S22 sketch map of second port of the two-band power splitter with electromagnetism superstructure of the utility model.

Figure 13 is the return loss S33 sketch map of the 3rd port of the two-band power splitter with electromagnetism superstructure of the utility model.

Figure 14 is second port of the two-band power splitter with electromagnetism superstructure of the utility model and the isolation S23 sketch map between the 3rd port.

Embodiment

In order more to be expressly understood the technology contents of the utility model, the special following examples of lifting specify.

See also shown in Figure 1ly, be the structural representation of the electromagnetism superstructure of the utility model.

In one embodiment, this electromagnetism superstructure is folding resonant mode electromagnetism superstructure, and described folding resonant mode electromagnetism superstructure is to have folding main transmission line as shown in Figure 1 and the complementary open-loop resonator of folding band line style as shown in Figure 2.Described main transmission line and complementary open-loop resonator are arranged at the front and back of a PCB respectively.Among Fig. 2 represented be the PCB back side through the figure after the etching, grey color part is represented metal, white portion is the zone that does not have metal after the etching.Main transmission line that should be folding is circular arc with the complementary open-loop resonator of folding band line style at folding position.

The encapsulating structure of this kind electromagnetism superstructure; As shown in Figure 3; Comprise a can; Described electromagnetism superstructure is arranged in the described can, and the one side that has the complementary open-loop resonator of folding band line style on the described pcb board connects described can bottom, and described can bottom is to offer groove on the corresponding position of the complementary open-loop resonator of described band line style.The degree of depth of described groove is not less than 5 millimeters.This use is novel also to provide a kind of two-band power splitter with described electromagnetism superstructure; In one embodiment; Like Fig. 7 and shown in Figure 8, described two-band power splitter comprises first port, second port and the 3rd port, and described first port connects described second port and the 3rd port through a support arm circuit respectively; It is characterized in that described support arm circuit is described electromagnetism superstructure.Described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

In practical application, the equivalent circuit diagram of the electromagnetism superstructure of the utility model, as shown in Figure 4, be a L _cAnd C _cThe resonant circuit over the ground of parallel connection.Analyze according to the Bloch theory, its unit structure phase shift is:

$\cos \left(\mathrm{\φ}\right)=1+\frac{Z_s\left(\mathrm{j\ω}\right)}{Z_p\left(\mathrm{j\ω}\right)}=1+\frac{C(1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_s^2})(1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_c^2})}{2C_g[1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_p^2}]},$

Its characteristic impedance is:

$Z_B=\sqrt{Z_s\left(\mathrm{j\ω}\right)[Z_s\left(\mathrm{j\ω}\right)+2Z_p\left(\mathrm{j\ω}\right)]}=\sqrt{\frac{C{(1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_s^2})}^2(1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_c^2})+4C_g[1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_p^2}](1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_s^2})}{-4{\mathrm{\ω}}^2{\mathrm{CC}}_g^2(1-\frac{{\mathrm{\ω}}^2}{{\mathrm{\ω}}_c^2})}},$

Wherein, Z _sAnd Z _pBe respectively polyphone and parallel impedance.And ${\mathrm{\ω}}_s=1/\sqrt{{\mathrm{LC}}_g},{\mathrm{\ω}}_c=1/\sqrt{L_c{C}_c},$ ${\mathrm{\ω}}_p=1/\sqrt{L_c(C_c+C)}.$

Adopt above-mentioned folding resonant mode electromagnetism superstructure to replace two sections branch support arms in traditional Wilkinson power splitter, and make the transmission characteristic of folding resonant mode electromagnetism superstructure satisfy Fig. 5 and requirement shown in Figure 6, then two-band work can realize.Can obtain initial circuit parameter according to Fig. 5, Fig. 6 and above two formula, and make up initial physical structure, adopt the Electromagnetic Simulation instrument to be optimized again, the parameter of the folding resonant mode electromagnetism superstructure that final acquisition needs according to these initial circuit parameters.With the two section branch support arms of final folding resonant mode electromagnetism superstructure, and adopt the Electromagnetic Simulation instrument to be optimized once more, obtain the parameter of final compact dual-frequency section Winkinson power splitter as two-band Wilkinson power splitter.

Each performance index of the two-band power splitter that this use is novel are as shown in the table:

Table 1 is based on the performance index of the two-band Wilkinson power splitter of folding resonant mode electromagnetism superstructure

Traditional Wilkinson power splitter generally needs 3 1/4 wavelength transmission lines in order to cover the 800-2500MHz frequency range, and length is the transformer section of 136mm.And the double frequency Wilkinson power splitter based on folding resonant mode electromagnetism superstructure of the utility model only only needs a transformer section just can realize that two sections of these two frequency ranges work, and that is to say to have practiced thrift general 2/3 size at least.

Shown in Figure 3, be the encapsulating structure of the electromagnetism superstructure of this utility model.Traditional encapsulating structure directly connects the metal ground of PCB with the can that is used to encapsulate, will destroy etch structures like this, thereby destroy complementary open-loop resonator.And in this encapsulating structure, then be that the hollow space with certain altitude is dug out in the zone that can contacts with open-loop resonator, can reduces the influence of complementary open-loop resonator like this.Hollow space thick more, then can is more little to the influence of complementary open-loop resonator, and the above thickness of general 5mm can be ignored the influence of encapsulation to the electromagnetism superstructure.

The structural representation of the front and back of the two-band power splitter with electromagnetism superstructure of this utility model is respectively like Fig. 7 and shown in Figure 8.

Fig. 9 to Figure 14 is the test result figure of the two-band power splitter with electromagnetism superstructure of the utility model, and as can be seen from the figure two-frequency operation is accomplished.

The two-band power splitter that has adopted electromagnetism superstructure, the encapsulating structure of this utility model and had this electromagnetism superstructure; Because its electromagnetism superstructure is the folding resonant mode electromagnetism superstructure with folding main transmission line and the complementary open-loop resonator of the band line style that folds; The support arm circuit of its this two-band power splitter is described electromagnetism superstructure; Feasible overall dimension with two-band power splitter of this electromagnetism superstructure significantly is reduced into 1/3 of existing product; Thereby reduce the requirement of power splitter for the application space; Increase the scope of application of power splitter, and the electromagnetism superstructure of the utility model and to have a two-band power divider structure of this electromagnetism superstructure simple, with low cost.

In this specification, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and the scope of the utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.

Claims (7)

1. electromagnetism superstructure; It is characterized in that; Described electromagnetism superstructure is folding resonant mode electromagnetism superstructure, and described folding resonant mode electromagnetism superstructure has the complementary open-loop resonator of folding band line style of the folding main transmission line of the one side that is arranged at a pcb board and the another side that is arranged at described pcb board.

2. electromagnetism superstructure according to claim 1 is characterized in that, described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

3. the encapsulating structure of the described electromagnetism superstructure of claim 1; It is characterized in that; Described encapsulating structure comprises a can; Described electromagnetism superstructure is arranged in the described can, and the one side that has the complementary open-loop resonator of folding band line style on the described pcb board connects described can bottom, and described can bottom is to offer groove on the corresponding position of the complementary open-loop resonator of described band line style.

4. the encapsulating structure of electromagnetism superstructure according to claim 3 is characterized in that, described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

5. according to the encapsulating structure of claim 3 or 4 described electromagnetism superstructures, it is characterized in that the degree of depth of described groove is not less than 5 millimeters.

6. two-band power splitter with the described electromagnetism superstructure of claim 1; Described two-band power splitter comprises first port, second port and the 3rd port; Described first port connects described second port and the 3rd port through a support arm circuit respectively; It is characterized in that described support arm circuit is described electromagnetism superstructure.

7. two-band power splitter according to claim 6 is characterized in that, described folding main transmission line is circular arc with the complementary open-loop resonator of folding band line style at folding position.

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