JPS60103802A - Waveguide-coaxial line converter - Google Patents

Abstract

PURPOSE:To convert a microwave signal of a waveguide into a strip line mode with simple structure, high reliability and high stability by constituting the converter with a TEM transmission line having an outer surface structure of a waveguide conductor and made of a conductor cover so as to provide an output terminal of a signal easily to an optional direction and position along the outer shape of the waveguide. CONSTITUTION:The waveguide-coaxial line converter is constituted that a slot is provided to the outer surface of a conductor constituting a waveguide 21, a cover 25 having a slot relative to the slot and the conductor constituting said waveguide form the outer conductor of the TEM transmission line, the conductor connected to a probe 22 extracting an electromagnetic field in the waveguide is used as a center conductor 22' of the TEM transmission line, and the center conductor is held by a insulator packed in the TEM transmission line. A ground electrode 30 at the rear side of the dielectric base 28 is connected electrically with a chassis part 21'' incorporated with the waveguide 21. Thus, an output terminal of a signal converted into the TEM mode (coaxial mode) is extracted in optional directions.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a waveguide-to-coaxial converter that can be used in ITi-friendly microwave tracing devices such as SHF broadcast receiving converters.

Conventional configurations and their problems In recent years, satellite broadcasting in the SHF band has been planned, and circuit technology with excellent i-productivity is required in the microwave field as well.
It has come to be. The price of microwave semiconductors has been rapidly decreasing due to the development of irl:j technology, and the arsenic productivity of microwave equipment is largely due to the four-circuit configuration.

The conventional waveguide/transfer converter Pζ will be described below with reference to the drawings.

Figure 1 is a cross-sectional view of the main parts of a conventional heart wave tube, taken parallel to two planes in the direction of electromagnetic rise and exit, where 1 is the waveguide, 1' is the waveguide, and 2 is the waveguide. 3 is a globe, and 3 is a globe 2fg xi4 without showing the edge of the hill 1 for holding in the wave tube 1. 4 is the output end of the globe 2, and a microstrip line 6 formed on the surface of a dielectric substrate S forming a microwave integrated circuit (hereinafter simply referred to as FF IG) 41.
It is connected to the. Glove 2 is Micros I・')
7, while the waveguide 1 is connected to the coaxial line 6, the coaxial line part 7, which makes the waveguide 1 the entire outer conductor, acts as a central body.Therefore, in the example of FIG. It has a composite structure of a converter gg and a coaxial-strip-in converter.

However, in the above configuration, in converting the coaxial mode to the microstrip line 6, the ground electrode 8 provided on the back surface of the dielectric substrate 5 is connected to the waveguide 1.
It is difficult to ensure electrical connection to the conductor of the coaxial portion 7, especially at the position of the outer core of the coaxial portion 7, and reliability
However, there was a problem in that it was not possible to easily achieve stable performance.

OBJECTS OF THE INVENTION The object of the present invention is to provide a waveguide-converter conversion system that enables a microwave signal in a waveguide to be converted into an all-stripline mode with a simple structure, high reliability, and high stability.・Structure of the Invention The heart wave tube-to-coaxial conversion term of the present invention is characterized in that a groove is provided on the outer surface of the conductor constituting the waveguide, and a cover body having a groove opposite to the groove is provided. The conductor constituting the waveguide is outside the TICM transmission line, and the conductor connected to the probe that extracts the electromagnetic field inside the waveguide is integrated with the center of the TEM transmission line, and inside the TEN transmission line. It is configured to hold the old 0 body with an insulator filled with it, and this allows the coaxial output terminal to be taken out in any direction. Embodiments of the present invention will be explained with reference to all 49 drawings. Figure 2 a shows a practical example of the present invention in which the waveguide and 1 - coaxial conversion words are shown in the traveling direction of the entire electromagnetic field. A cross-sectional view of the main part, Fig. 2A (t)
This is the outside lq diagram when looking to the left side from the surface.Figure 2a,
In b, 21 is a waveguide, 21' is a flange, 22 is a probe, 22' is the center conductor of the same l111+ line, 2
3 is an insulator that fixes the probe 22 within the waveguide 21;
4 is the same wire, filled in the wire, medium and high conductor 22'
An insulator 26 is used to completely fix the outer surface of the waveguide 21.
It has a groove 26' facing the waveguide 21, and an insulator 24 between 11 and 11 of the entire outer conductor of the same 111+ line with the waveguide 21.
27a and 27b are the lids 26 for fixing the
The screw 28 is the MIQ dielectric substrate, and the output end of the center conductor 22' is connected to the conductor 2 of the microstrip line.
9 is connected. A ground electrode 30 on the back surface of the dielectric substrate 28 is connected to the chassis portion 21'' integrated with the waveguide 21.
and 'are electrically connected. Reference numeral 31 denotes a matching metal piece or dielectric piece that is practically provided in order to correct the sound reflected at the corners of the TEM propagation.

According to the special wave tube-to-channel converter of this embodiment configured as described above, the output end of the signal υ- converted to the TEM mode (coaxial mode) can be taken out in any direction. In the embodiment shown in FIG. 2, the signal is output in the same direction as the signal propagation direction within the waveguide (C2). As a result, the dielectric substrate 2 of the MIC
8 can be positioned in any direction with respect to the waveguide 21, providing a high degree of freedom in design regarding the machine AG configuration. 44. It will be done. The parts required for this purpose are simple, consisting of the insulator 24 that supports the center conductor 22' and the lid 25 that presses it down, and no special electrical consideration or precise machining accuracy is required. Nevertheless, ψJ has very good propagation performance without large propagation discontinuities in the TEM propagation order.
I can wait. Furthermore, since the output end of the coaxial line can be separated from the conductor of the waveguide 21, the dielectric substrate 2 of the MIC
8 ground can be ensured. That is, the first
In the case of the conventional example shown in the figure, the method of connecting the eccentric body to the ground electrode and the coaxial portion is generally by using pressure bonding or a conductive adhesive, which is not a reliable method. However, in the case of Figure 2a, for example, middle ID ) J type 2
2' and the microst IJ tube line 29 connection 6 (s) by drilling a hole in the chassis 21'' part below the
It is possible to completely reliably connect the ground electrode 30 and the output end of the coaxial outer conductor 26 by using the same method.

Next, embodiments of music according to the present invention will be described with reference to the drawings.

FIG. 3 is a cross-sectional view of the main parts of the heart wave trade-coaxial conversion word in the song embodiment of the present invention. In FIG. 3, parts given the same numbers as in FIG. 2 are parts having the same functions as in FIG. In Fig. 3, 4o is a cylindrical conductor inserted closely between the insulator 24 and the coaxial outer conductor, and this 1:1) shaped conductor 4Q controls the operation of the outer conductor of the 11+ line. Let's do it. The ground electrode 30 of the dielectric plate 28 of the MIC is connected to the output end. The connection between the ground electrode 30 of the i4 IC and the outer conductor 4o can be made very easy and reliable by using a half 11141 or the like. Practically, M I O is made from a waveguide or another acid body using a separate support metal fitting or the like. By changing the length of the cylindrical outer body 4o, the position of the output end can be easily adjusted. Also MIC dielectric! + (Plate 28 (4-axis axis line) It is possible to connect at an arbitrary rotated angle of U and at an angle of ``J''. Because of the structure and the TEM transmission line made of a conductor lid, the signal output end can be easily placed in any direction and position along the external shape of the waveguide. Therefore, when the device is designed to have a high degree of whiteness and is connected to an MIC, it is possible to easily obtain excellent connection performance, resulting in an extremely excellent effect of making the microwave device more resilient.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main parts of a conventional waveguide-coaxial converter.
Figures 2a and b are cross-sectional views and external views of the main parts of a heart wave tube-coaxial converter according to an embodiment of the present invention, and Figure 3 is a cross-sectional view of the main parts of an embodiment of the present invention. There is 21... waveguide, 22... pro nib,
24...Insulator, 26...Conductor cover, 2
2'...center ig body, 4o...age 1-like conductor, 28...dielectric,! I (board. Name of agent: B1 Physician Toshio Nakao and 1 other person Figure 2 (Illusion Figure 3)

Claims (2)

[Claims] (1) A groove is provided on the outer surface of the conductor constituting the waveguide (t11), the cover body of the conductor has a groove facing this 41.7, and the above-mentioned H) wave tube as a whole 4117. The outer conductor of the TEM transmission line, all four of which are connected to the pro nib without taking out the electromagnetic field inside the heart wave sensor, are inside the TEM transmission line.
? A heart wave tube-coaxial transducer, characterized in that it is made of cotton and is configured to hold the middle ID conductor with an insulator that is optically insulated within the TEM transmission line. (2) A cylindrical conductive gold film is placed between the outer conductor and the four bodies of the TEM transmission line! 1 h゛; ji claim 1st paragraph gi waveguide-coaxial conversion a (÷0