CN201773922U - Duplexer - Google Patents

Abstract

The utility model discloses a duplexer which is a device for receiving and transmitting a signal. The duplexer consists of a cavity, a cover plate, a fixing part, an adjusting screw nail and an antenna terminal interface, wherein the cavity is connected with the cover plate by the fixing part, the left side and the right side in the cavity are respectively provided with eight resonant cavities which are sequentially connected with each other, the resonant cavities and corresponding input/output interfaces respectively form into a wave filter, and the two wave filters with different frequencies are connected with each other in parallel to form into the duplexer together with a public antenna terminal interface. The duplexer is low in dissipation, has high-power capacity, guarantees the assembling consistency of all parts of the duplexer, is easy to install, can improve the machining efficiency, and has the advantages of being compact in structure and smaller in weight.

Description

Duplexer

Technical field

The utility model relates to a kind of device that receives and transmit, specifically a kind of superfrequency, the passive duplexer of extremely high frequency microwave waveguide.

Background technology

Duplexer is widely used in field of telecommunications, its effect is with emission and to accept signal isolated, guarantee to receive and emission energy while operate as normal, traditional duplexer mainly is divided into two kinds: one, form by cavity and cover plate, its cavity adopts non-welding manner to be connected with cover plate, usually adopt screw to connect, this connected mode can guarantee the performance requirement of product, but it mainly is applicable to the duplexer of some low frequencies and high frequency, can not satisfy superfrequency, the performance requirement of extremely high frequency duplexer, because for superfrequency, the duplexer of extremely high frequency, when the frequency requirement of product is higher, the distributed constant influence is bigger, and assembling between any parts and combination all can have influence on the air-tightness of product, cause its decreased performance; Two, its cavity and cover plate are an overall structure, and by the one duplexer of aluminium section bar hot-drawn moulding, its air-tightness accesses assurance, but the internal structure of product is very restricted, and then are difficult to realize than complex inner structure.

The utility model content

Performance requirements such as the purpose of this utility model provides a kind of power capacity height that can guarantee superfrequency, extremely high frequency duplexer, insert that loss is little, isolation is high, temperature drift is little during work, solved the consistency problem of duplexer each several part assembling again well, simplify processing technology, improved the efficient of processing.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of duplexer, form by cavity, cover plate, fixture, debugging screw and antenna end interface, cavity is connected by fixture with cover plate, about in the cavity eight resonant cavitys that are linked in sequence are arranged respectively, form a filter respectively by resonant cavity and corresponding input/output interface, the filter of two different frequencies and connect after add a community antenna end interface and form duplexer.

Described fixture is a screw.

Be provided with window between the described resonant cavity.

The utility model has selected coupling window commonly used to come coupling energy, this coupled structure belongs to the electromagnetism hybrid coupled, account for leading with magnetic coupling, can control the size of coupling amount very easily, have window between the resonant cavity, can realize inductance or capacitive coupling, the size that changes window is controlled the size of coupling inductance or electric capacity to realize filter, cross-linked quantity between the control resonant cavity and big or small position and the number of realizing transmission zero.Taking into account under the situation of nonloaded Q, can realize the power capacity and the volume that need by changing the size of cavity internal and external conductor.Having under the situation of capacitive load, the volume of filter can be done very for a short time.By the eigen mode analysis of electromagnetic field simulation software, resonance frequency fe and fm when the extraction adjacent resonators model plane of symmetry is respectively desired electrical wall and desirable magnetic wall,

By formula $K=\±\frac{f_e^2-f_m^2}{f_e^2+f_m^2}$

Calculate corresponding coupling coefficient.By good external load is set, analyze the real part Re (f) and the imaginary part Im (f) of the resonance frequency of extraction model with eigen mode,

By formula

$\mathrm{Qe}=\frac{\sqrt{\mathrm{Re}{\left(f\right)}^2+\mathrm{Im}{\left(f\right)}^2}}{2\mathrm{Im}\left(f\right)}$

Try to achieve corresponding Qe.With the parameter designing of two channel models good after, by some parameters of genetic algorithm optimization filter and the combination of community antenna joint.

The beneficial effects of the utility model are:

The utility model loss is low, have high power capacity, guaranteed the consistency of duplexer each several part assembling, is easy to install, and can improve working (machining) efficiency; And compact conformation, weight is lighter.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1, antenna end interface; 2, debugging screw; 3, cover plate; 4, cavity; 5, screw.

Embodiment

A kind of duplexer, form by cavity 4, cover plate 3, fixture, debugging screw 2 and antenna end interface 1, cavity 4 and cover plate 3 are connected by fixture, about in the cavity 4 eight resonant cavitys that are linked in sequence are arranged respectively, form a filter respectively by resonant cavity and corresponding input/output interface, the filter of two different frequencies and connect after add a community antenna end interface 1 and form duplexer.

Described fixture is a screw 5.

The production procedure of this product is: at first steel mesh is smeared an amount of tin cream with tool on cover plate 3, then with cavity 4 and 5 lockings of cover plate 3 usefulness screws, be placed on the welding of Reflow Soldering machine the inside, assembly and adjustment screw 2 and antenna end interface 1 connect network analyzer with product and debug then.

Above content be in conjunction with concrete execution mode to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, make some simple deductions and replacement, all should belong to protection category of the present utility model.

Claims (3)

1. duplexer, form by cavity (4), cover plate (3), fixture, debugging screw (2) and antenna end interface (1), it is characterized in that: cavity (4) is connected by fixture with cover plate (3), about in the cavity (4) eight resonant cavitys that are linked in sequence are arranged respectively, form a filter respectively by resonant cavity and corresponding input/output interface, the filter of two different frequencies and connect after add a community antenna end interface (1) and form duplexer.

2. according to the described duplexer of claim 1, it is characterized in that: described fixture is screw (5).

3. according to the described duplexer of claim 1, it is characterized in that: be provided with window between the described resonant cavity.

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