JPH011301A - MIC isolator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a MIC isolator.

[Prior Art] Conventionally, this type of MIC isolator has a resonator section 5. as shown in FIG. Input/output section 6. A conductor pattern 2. connects the resonance section 5 and the input/output section 6. a terminator 4 connected to the resonator 6; It is composed of a magnet 3 that surrounds the resonator 5 and a subcarrier 7 that accommodates each of these members.

As shown in FIG. 4, this isolator 30 is connected to the front and rear stages of a microwave amplifier 40 to form a microwave amplification circuit.

[Problems to be Solved] Since this type of microwave amplifier circuit requires a DC bias, a capacitor 41 is connected to the input/output section of the microwave quadrupler 40 as shown in FIG. , prevents DC voltage from being applied to the outside.

However, in the configuration described above, the microwave amplifier 4
Since it is essential to use the capacitor 41 at the input/output section of the amplifier, there is a drawback that the overall size of the amplifier circuit becomes large.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a MIC isolator that solves the above-mentioned conventional pressure points and can be miniaturized when used in a microwave amplification circuit or the like.

[Means for Solving Problems] According to the present invention, a MIC isolator is constructed by providing a DC blocking capacitor between the resonant section and the input/output section.

[Example] Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of a MIC isolator according to the present invention.

In the figure, the isolator 10 according to the present embodiment is
The difference from the conventional isolator 30 shown in FIG. 3 is that a chip capacitor 1 is provided between the resonant section 5 and the input/output section 6.

Other components are designated by the same reference numerals as those in Fig. 3.
A detailed explanation thereof will be omitted.

According to such a configuration, the conductor pattern 2 of the input/output section 6
Since the resonant section 5 and the resonant section 5 are insulated in terms of direct current,
Even if a voltage is applied to the input/output section 6, no current flows through the termination section 4 to the subcarrier (which functions as a ground) 7.

FIG. 2 shows an example in which the MIC isolator 10 shown in FIG. 1 is placed before and after the microwave amplifier 20 to configure a microwave amplification circuit.

In this case, a chip capacitor 1 is attached to the isolator 10 itself.
Since the microwave amplifier 20 is equipped with a capacitor 41, unlike the microwave amplifier 40 shown in FIG.
does not have. Therefore, the microwave amplifier 20 has a smaller external shape than the microwave amplifier 40 shown in FIG.

On the other hand, since the MIC isolator 10 has only two chip capacitors 1 compared to the conventional one, it has the same external shape as the conventional isolator, and therefore, the external shape as a microwave amplification circuit is different from that of the conventional one. Comparatively, the size can be reduced by the size of the microwave amplifier.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

For example, the present invention can be applied to a MIC isolator that does not include the terminator 4.

[Effects of the Invention] As explained above, according to the present invention, by arranging a capacitor between the resonance part and the input/output part of a MIC isolator, it is possible to miniaturize a micro amplifier circuit, etc. that uses this isolator. becomes possible.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a MIC isolator which is an embodiment of the present invention, Fig. 2 is a circuit configuration diagram of a microwave amplifier circuit using the MIC isolator of Fig. 2, and Fig. 3 is a diagram of a conventional MIC isolator. A schematic explanatory diagram, FIG. 4 is a circuit configuration diagram of a conventional microwave amplification circuit using the isolator of FIG. 3. 1; Capacitor, 5; Resonant part, 7; Input/output part, Agent: Kihei Watanabe, Patent Attorney

Claims (2)

[Claims] (1) A MIC isolator characterized in that a DC blocking capacitor is provided between a resonant section and an input/output section. (2) The MIC isolator according to claim 1, wherein the capacitor is formed of a chip capacitor.