JPH0212725Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a microelectromechanical device constructed by providing a groove in a ground conductor provided on one side of a dielectric plate, as well as providing resistors, capacitors, semiconductor elements, etc. It is related to wave integrated circuits.

[Conventional technology]

Conventionally, a mixer using a slot line, which is an example of a microwave integrated circuit, has, for example,
IEEEMicrowave Theory and Technics MTT
-28, No. 3 MARCH1980, P.180 is known. FIG. 3 is a perspective view showing the configuration of a mixer using a slot line, which is an example of a conventional microwave integrated circuit. In the figure, 1 is a dielectric plate, 2 is a ground conductor, 3a and 3b are diodes, 4 is a slot line, 5 is a slot line with a short-circuited end, 6 is a microstrip line, 7 is a coplanar line, and 8 is an open part of the coplanar line.

The mixer configured as described above mixes a local oscillation wave and a signal wave, and converts it into an intermediate frequency having a frequency that is the difference between the two frequencies. An oscillation wave is input, a signal wave is input from the slot line 4, and an intermediate frequency converted to the difference between the two frequencies is extracted from the microstrip line 6. That is, the local oscillation wave is converted from the microstripline 6 to the coplanar line 7, and each diode 3 connected to the coplanar line opening 8 at the junction of the coplanar line 7 and the slot line 4
Added to a, 3b. Each diode 3a, 3b
Since two diodes 3a and 3b having a resistance value of about 100 to 150Ω are connected in parallel to the coplanar line 7, matching between the coplanar line 7 and each diode 3a, 3b having a resistance value of about 100 to 150Ω can be achieved relatively easily.

On the other hand, a signal wave is applied to each diode 3a, 3b connected to the tip of the slot line 4. Since these two diodes 3a and 3b are connected in series to the slot line 4, the resistance value of each diode 3a and 3b is approximately 200 to 300Ω, and the slot line 4 and each diode 3a, whose characteristic impedance is approximately 50 to 150Ω, , 3b, it is necessary to provide a matching circuit. Tip short-circuit slot line 5 shown in Figure 3
operates as a matching circuit provided for this purpose.

[Problem that the invention attempts to solve]

In the mixer using the conventional microwave integrated circuit as described above, the signal power is transferred to each diode 3a,
A slot line 5 with a short circuit at the tip, which operates as a matching circuit to add good matching to the dielectric plate 1
It is made by etching on the ground conductor 2 of. For this reason, due to variations in the characteristics of the diodes 3a and 3b, even if an attempt is made to adjust the matching circuit, sufficient adjustment cannot be made except by changing the length of the slot line 5, which is short-circuited at the tip.
As a result, there was a problem in that the conversion loss of the mixer increased.

This invention was made to solve this problem, and aims to provide a microwave integrated circuit in which a matching circuit for efficiently supplying signal power can be easily adjusted from the outside.

[Means for solving problems]

The microwave integrated circuit according to this invention has a dielectric plate having a strip conductor perpendicular to the slot line or fin line on its surface on a ground conductor provided with a groove forming the slot line or fin line. .

[Effect]

In the microwave integrated circuit of this invention, a matching circuit is constructed by utilizing the fact that a strip conductor perpendicular to a slot line or a fin line is strongly coupled to the slot line, and a susceptance corresponding to the length of the strip conductor is applied to the slot line. It consists of Since this strip conductor is provided on the surface of a dielectric plate different from the dielectric plate constituting the slot line, the matching circuit can be arbitrarily adjusted by changing the length and position of the strip conductor. Can be done.

〔Example〕

FIG. 1 is a perspective view showing the configuration of a mixer using a microwave integrated circuit, which is an embodiment of this invention, and the reference numerals 1 to 4 and 6 to 8 are exactly the same as those of the conventional mixer. In the figure, 9 is a strip conductor, and 10 is a dielectric plate having the strip conductor 9 on its surface.

In the mixer configured as described above, the strip conductor 9, the ground conductor 2, and the dielectric plate 10 constitute a microstrip line. In general, slot lines and quasi-TEM that propagate quasi-TE waves
Microstrip lines that propagate waves are made perpendicular to each other so that their magnetic field components match and are strongly coupled. Therefore, the slot line 4 shown in FIG. 1 is coupled to the strip conductor 9, and a susceptance corresponding to the entire length of the strip conductor 9 is added in parallel to the slot line 4 to form a matching circuit. In this way, by fixing one or more of the dielectric plates 10 having the strip conductor 9 on the surface by a method such as gluing on the slot line 4, the matching of the signal wave to each diode 3a, 3b can be improved. can do. Furthermore, by changing the positional relationship between the dielectric plate 10 and each of the diodes 3a and 3b, or by changing the overall length of the strip conductor 9, the matching circuit can be easily and easily adjusted.

FIG. 2 is a perspective view showing the configuration of a mixer using a microwave integrated circuit, which is another embodiment of this invention. FIG. 2 shows a configuration in which two dielectric plates 10 having the strip conductor 9 shown in FIG. 1 above are used, and the operation mode is the same as that in FIG. Further explanation will be omitted.

In the above embodiment, a mixer using a microwave integrated circuit was explained, but this invention is not limited to this, but can be applied to all microwave integrated circuits that use slot lines or fine lines such as oscillators, amplifiers, and switches. Needless to say, it can be applied to

[Effect of idea]

As explained above, in this invention, a matching circuit to be provided on a slot line or fin line in a microwave integrated circuit is created by gluing a dielectric plate having a strip conductor of a predetermined length on its surface onto the slot line or fin line. By changing the position of this dielectric plate or changing the length of the strip conductor, the matching circuit can be easily and easily adjusted. It is something.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of a mixer using a microwave integrated circuit, which is an embodiment of this invention;
FIG. 2 is a perspective view showing the configuration of a mixer using a microwave integrated circuit, which is another embodiment of this invention;
FIG. 3 is a perspective view showing the configuration of a mixer using a slot line, which is an example of a conventional microwave integrated circuit. In the figure, 1, 10... dielectric plate, 2... ground conductor, 3a, 3b... diode, 4... slot line, 5... slot line with short circuit at the end,
6...Microstripline, 7...Coplanar line, 8...Coplanar line open part, 9...
It is a strip conductor. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a microwave integrated circuit using a slot line or a fin line formed by providing a groove in a ground conductor provided on one surface of a first dielectric plate, a predetermined length of a groove perpendicular to the groove provided in the ground conductor is provided. One or more second dielectric plates having one or more strip conductors on one side are connected to the ground conductor side of the first dielectric plate and the second dielectric plate. A microwave integrated circuit, characterized in that the microwave integrated circuit is fixed on the first dielectric plate so that the surface on the side where the strip conductor is not provided is in contact with the surface.