CN201773921U - Waveguide coaxial microwave converter - Google Patents

Abstract

A waveguide coaxial microwave converter mainly comprises a first converter, a second converter and a flange which are connected sequentially. The first converter is a waveguide coaxial converter in an orthorhombic structure, one end of the first converter is fixed with an SMA female connector, the SMA female connector is connected with a coaxial wire correspondingly provided with a male connector and connected with a network analyzer, an interface at the other end of the first converter is provided with a BJ320(WR28) waveguide which is located at the center of an end face so as to realize conversion between the coaxial and BJ320(WR28) moment waveguides, the second converter is a moment-moment transition waveguide, and two ends of the second converter are provided with a waveguide BJ320(WR28) and a waveguide BJ260(WR34) so that conversion between the waveguide BJ320(WR28) and the waveguide BJ260(WR34) is realized, conversion and simple assembly of the waveguide BJ260(WR34) and a product antenna end are realized by the aid the flange, and two connectors are connected via screws, the connectors and the flange are also connected via screws, thereby saving labor and time.

Description

The coaxial microwave transducer is changeed in waveguide

Technical field

The scope that the utility model is used comprises that all need waveguide and the coaxial duplexer of changing.

Background technology

The debugging of traditional duplexer can't realize waveguide and coaxial between conversion----coaxial line (TEM mould) be transformed into the connected mode of conversion between rectangular waveguide (TE10 mould) or the different waveguide mouth or waveguide and product antenna segment need be by the screw thread mode that wastes time and energy such as fixing.

The utility model content

The purpose of this utility model provides a kind of waveguide changes the coaxial microwave transducer, solve waveguide and coaxial between conversion, coaxial line (TEM mould) is transformed into rectangular waveguide (TE ₁₀The conversion of the conversion between different waveguide mouth mould),, waveguide and product antenna end and the easy problem that assembles.

The purpose of this utility model is to be achieved through the following technical solutions:

The coaxial microwave transducer is changeed in waveguide, mainly form by first transducer, second transducer and flange, three elements connect successively, first transducer is the waveguide coaxial converter of orthohormbic structure, an end is fixed with the cloudy head connector of SMA on first transducer, the cloudy head connector of SMA links to each other with the coaxial line that has positive head connector accordingly that is connected network analyzer, the first transducer other end interface is BJ320 (WR28) waveguide, BJ320 (WR28) waveguide is positioned at the center of end face, has realized the conversion between coaxial and the waveguide of BJ320 (WR28) square; Second transducer is square-square transition waceguide, and two ends are different square waveguide BJ320 (WR28) and BJ260 (WR34), have realized the conversion between different waveguide----BJ320 (WR28) and the BJ260 (WR34); Flange has been realized the conversion and the easy assembling of waveguide----BJ260 (WR34) and product antenna end; All available screw is connected between two adapters and between connector and the flange, and is time saving and energy saving.

The utility model has been realized between the different waveguide that conventional method is difficult to realize, waveguide and coaxial between conversion, coaxial line (TEM mould) is transformed into rectangular waveguide (TE ₁₀Mould), and the conversion and easy the assembling of having realized waveguide and product antenna end in easy mode, easy to connect between the adapter, low insertion loss, enough frequency bandwidths, compact conformation arranged, be convenient to design processing.

Description of drawings

With embodiment the utility model is described in further detail with reference to the accompanying drawings below.

Fig. 1 is the structure chart that the coaxial microwave transducer is changeed in waveguide.

Embodiment

As shown in Figure 1, this product mainly is made up of first transducer 2, second transducer 5 and flange 7, three elements connect successively, first transducer 2 is the waveguide coaxial converter of orthohormbic structure, an end is fixed with the cloudy head connector 1 of SMA on first transducer 2, the cloudy head connector 1 of SMA links to each other with the coaxial line that has positive head connector accordingly that is connected network analyzer, first transducer, 2 other end interfaces are BJ320 (WR28) waveguide 3, BJ320 (WR28) waveguide 3 is positioned at the center of end face, has realized the conversion between coaxial and the waveguide of BJ320 (WR28) square; Second transducer 5 is square-square transition waceguide, and two ends are different square waveguide BJ320 (WR28) waveguide 4 and BJ260 (WR34) waveguides 6, have realized the conversion between different waveguide----BJ320 (WR28) waveguide 4 and BJ260 (WR34) waveguide 6; Flange 7 has been realized the conversion and the easy assembling of waveguide----BJ260 (WR34) and product antenna end; All available screw is connected between two adapters and between connector and the flange, and is time saving and energy saving.

In first transducer, the wide wall of the outer conductor of coaxial line and rectangular waveguide connects together, and the extension of inner wire (probe) inserts in the waveguide, forms a little radiating antenna, motivates the electromagnetic wave of TE10 pattern in waveguide.Since in rectangular waveguide, inserted probe, coaxial--and reactance has been introduced in conversion place of-rectangular waveguide, causes wave reflection, is the mismatch aggravation of coaxial line and waveguide.The input impedance formula of this structure that provides in " guided wave field theory " according to Ke Lin makes that input impedance is R+jX, adopts the method for integration, obtains the expression formula of input impedance:

$R=\frac{{2Z}_O}{a{\mathrm{b\&beta;}}_{1O}{K}_O}{\sin }^2{\mathrm{\&beta;}}^{1O}{l\tan }^2{\mathrm{<figure-callout\; id="2"\; label="K\; O\; d"\; filenames="HSA00000216623000011.png"\; state="\{\{state\}\}">K</figure-callout>}}_O\frac{d}{}\frac{}{2}$

$X=\frac{z_0{\tan }^2\frac{k_0\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HSA00000216623000011.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}}{2\mathrm{\&pi;}{k}_{0}b}\{\ln \frac{2a}{\mathrm{\&pi;r}}+\frac{0.0518k_0^2{a}^2}{{\mathrm{\&pi;}}^2}+\frac{2\mathrm{\&lambda;}}{{\mathrm{\&beta;}}_{10a}}{\sin }^2{\mathrm{\&beta;}}_{10}l-2(1-\frac{2r}{a})-{2K}_0^2\underset{n=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}{[1-\frac{{\sin }^2{\left(\frac{\mathrm{n\&pi;d}}{2b}\right)}^2}{{\sin }^2\left(\frac{K_{0}d}{2}\right)}]}^2\frac{k_0\left(K_n\right)}{K_n}\}$

In the formula, 1 is waveguide terminal short circuit distance, and d is the insertion depth of probe, and a and b are respectively the wide and high of waveguide.From two top equatioies as can be seen, the input impedance of probe is probe diameter, the length of going deep into cavity and waveguide terminal distance and the function of frequency.Therefore can suitably regulate the insertion depth d and the waveguide terminal short circuit distance 1 of probe, just can improve matching performance greatly, and in higher frequency range, keep less insertion loss.

In second transducer, adopt four joint step impedance conversions, the parameter that in the total transiting performance is exerted an influence is the length and width of transformer section.

Claims (2)

1. the coaxial microwave transducer is changeed in waveguide, mainly form by first transducer, second transducer and flange, three elements connect successively, it is characterized in that, first transducer is the waveguide coaxial converter of orthohormbic structure, an end is fixed with the cloudy head connector of SMA on first transducer, and the cloudy head connector of SMA links to each other with the coaxial line that has positive head connector accordingly that is connected network analyzer, and the first transducer other end interface is waveguide; Second transducer is square-square transition waceguide, and two ends are different square waveguides.

2. the coaxial microwave transducer is changeed in waveguide according to claim 1, it is characterized in that waveguide is positioned at the center of end face.

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