JP2002217619A - Equalizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in that a high-frequency micro chip capacitor needed to be replaced when a resonance frequency was to be changed before, further adjustment was difficult since short stabs were used and the resonance frequency could not be changed easily when the resonance frequency was to be changed by inductors. SOLUTION: The input end of a micro strip sub line is arranged opposite to the side end of a micro strip main line for forming a pattern gap for composing capacitance, an adjustment pattern is arranged near the input end of the micro strip main line and along the side end of the micro strip main line, and connection to an input end is made by a gold wire or a gold ribbon as needed, thus changing the width of the pattern width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of a microwave circuit, and more particularly to an equalizer including a microstrip line.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a microwave circuit constituting a conventional equalizer. In the figure, reference numeral 7 denotes a microstrip line substrate on which circuit elements to be described later are formed or mounted. Reference numeral 1 denotes a main microstrip line, and reference numeral 2 denotes a microstrip subline. Reference numeral 4 denotes a resistor formed of a pattern resistor or a chip resistor, and constitutes an attenuator. 5 is a short stub, 10 is a high frequency microchip capacitor, and 11 is a gold wire.

On a main line 1 of a microstrip line,
A high-frequency microchip capacitor 10 is mounted, and this high-frequency microchip capacitor 10 is connected to one end of the microstrip sub-line 2 by a gold wire 11. The other end of the microstrip sub-line 2 is connected to one end of a resistor 4 composed of a pattern resistor or a chip resistor formed on the microstrip line. The other end of the resistor 4 is connected to the other end of the short stub 5.

FIG. 4 shows an equivalent circuit of this equalizer. In the figure, 12 is a capacitor, 13 is an inductor, and 14 is a resistor. The inductor 13 is obtained by the short stub 5 constituted by a microstrip line. The frequency characteristics of the equalizer are represented by characteristics as shown in FIG. The resonance frequency f0 is
And the value of the inductor 13, the frequency f0
Is desired to be changed, the value of the capacitor 12 or the inductor 13 may be changed. The capacitance is changed by replacing the high-frequency microchip capacitor 10 on the actual circuit. The inductor 13 may be changed by changing the short stub 5, but since the other end of the short stub 5 is a ground electrode connected to the back surface of the microstrip line substrate 7, the pattern must be changed.

[0005]

Since the conventional equalizer is constructed as described above, a troublesome assembling work is required to connect the electrode pad of the capacitor and the microstrip line with the gold wire when mounting the capacitor. Was needed. Also, if you try to change the resonance frequency,
It was necessary to replace the high-frequency microchip capacitor with a capacitor having a different capacitance, and the operation of adjusting the resonance frequency was not easy. Furthermore, since a short stub is used as a circuit element of the equalizer, the length of the short stub cannot be easily changed, and there is a problem that adjustment of the inductor is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide an equalizer having a simple configuration capable of easily changing the resonance frequency and reducing the number of parts and the number of assembly steps. .

[0007]

An equalizer according to the present invention is a microwave circuit formed on a microstrip line substrate, and comprises a microstrip main line and a capacitance opposed to a side edge of the microstrip main line. A microstrip sub-line having an input end disposed with a pattern gap therebetween, a resistor having one end connected to the output end of the microstrip sub-line, and a microstrip line connected to the other end of the resistor A short stub of at least one side of the input end of the microstrip sub-line and along the side edge of the microstrip main line, and the pattern gap is connected to the input end by a gold wire or a gold ribbon. And an adjustment pattern for changing the facing width of the input end. A.

[0008] An equalizer according to the present invention includes an open stub instead of a short stub.

In the equalizer according to the present invention, a plurality of adjustment patterns are arranged on both sides of the input end of the microstrip sub-line.

Further, an equalizer according to the present invention is arranged near an open end of the open stub, and is connected to the open end with a gold wire or a gold ribbon to change the length or width of the open stub. Are provided.

An equalizer according to the present invention, in a microwave circuit formed on a microstrip line substrate, has a microstrip main line and a pattern gap opposed to a side edge of the microstrip main line to form a capacitance. A microstrip sub-line having an input end disposed therein, a resistor having one end connected to the output end of the microstrip sub-line, and an open stub of a microstrip line connected to the other end of the resistor.
An adjustment pattern is provided near the open end of the open stub, and is connected to the open end with a gold wire or a gold ribbon to change the length or width of the open stub.

In the equalizer according to the present invention, a plurality of adjustment patterns are arranged vertically and horizontally near the open end of the open stub.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a circuit diagram showing an equalizer according to Embodiment 1 of the present invention. In the figure, reference numeral 7 denotes a microstrip line substrate, on which the following circuit elements are formed. 1 is a microstrip main line, and 2 is a microstrip subline. Reference numeral 3 denotes a pattern gap, which is formed by arranging the input end of the microstrip sub-line 2 so as to face the side edge of the microstrip main line 1 and constitutes a capacitance. Reference numeral 4 denotes a resistor formed of a microstrip line and formed of a pattern resistor or a chip resistor. One end is connected to the output end of the microstrip subline 2. Reference numeral 5 denotes a short stub formed of a microstrip line, one end of which is connected to the other end of the resistor 4. Numeral 6 is an adjusting pattern, which is arranged along the side edge of the microstrip main line 1 near both sides of the input end of the microstrip sub-line 2 and adjusts the capacitance formed by the pattern gap 3. is there.

Next, functions obtained by the equalizer shown in FIG. 1 will be described. The resonance frequency can be changed by changing the capacitance formed by the pattern gap 3 formed at the side edge of the microstrip main line 1 and the input end of the microstrip subline 2.
Here, the capacitance is the length of the pattern gap 3 and
It is determined by the width, that is, the facing width of the input end of the microstrip subline 2. Therefore, the capacitance can be changed by changing the facing width. To this end, an appropriate number of adjustment patterns 6 provided near the input end of the microstrip sub-line 2 are connected to the microstrip sub-line 2 by gold wires or ribbons, and the opposing width of the pattern gap 3 is substantially reduced. Should be changed to By changing the capacitance in this way, the resonance frequency is changed. Although the example in which a plurality of the adjustment patterns 6 are formed on both sides of the input end of the microstrip sub-line 2 is shown, the formation position may be on one side, and the number may be one.

As described above, according to the first embodiment, the width of the pattern gap between the microstrip main line 1 and the microstrip sub-line 2 can be changed by the gold wire or gold ribbon as necessary. , The workability for changing the capacitance is improved, and the resonance frequency can be easily changed.

Embodiment 2 FIG. 2 is a circuit diagram showing an equalizer according to Embodiment 2 of the present invention. In the figure, reference numeral 7 denotes a microstrip line substrate on which the following circuit elements are formed. 1 is a microstrip main line, and 2 is a microstrip subline. Reference numeral 3 denotes a pattern gap, which is formed by arranging the input end of the microstrip sub-line 2 so as to face the side edge of the microstrip main line 1 and constitutes a capacitance. Reference numeral 4 denotes a resistor formed of a microstrip line and formed of a pattern resistor or a chip resistor. One end is connected to the output end of the microstrip subline 2. Reference numeral 8 denotes an open stub constituted by a microstrip line, one end of which is connected to the other end of the resistor 4. Reference numeral 9 denotes an adjustment pattern (second adjustment pattern) formed in a suitable number of rows and columns on the periphery of the other end (open end) of the open stub 8 for adjusting the length of the open stub 8. is there.

Next, functions obtained by the equalizer shown in FIG. 2 will be described. In the first embodiment, the resonance frequency is changed by changing the capacitance. In the second embodiment, the resonance frequency is changed by changing the inductance as follows. This can be achieved by changing the length or width of the open stub 8 connected to one end of the resistor 4. Therefore, as a method of changing the length and width of the open stub 8, an adjustment pattern 9 is provided near the open end of the open stub 8. When the open end of the open stub 8 is connected to the adjustment pattern 9 using a gold wire or a gold ribbon, the length or width can be changed. By changing the length or width of the open stub 8, the inductance is changed, and the resonance frequency is changed.

According to the second embodiment, the open stub 8
The length or width of the open stub 8 can be changed by connecting it to the adjustment pattern 9 provided near the open end using a gold wire or a gold ribbon. It has the effect that the frequency can be changed. Further, since the capacitance is formed integrally with the pattern of the microstrip line, the number of parts can be reduced accordingly.

[0019]

As described above, according to the present invention, in a microwave circuit formed on a microstrip line substrate, a microstrip main line and a capacitance are formed facing the side edge of the microstrip main line. A microstrip sub-line having an input end disposed with a pattern gap therebetween, a resistor having one end connected to the output end of the microstrip sub-line, and a microstrip line connected to the other end of the resistor. A short stub and an input end disposed near at least one side of the input end of the microstrip sub-line and along the side edge of the microstrip main line, and formed with the input end and a gold wire or a gold ribbon to form a pattern gap. It is configured to have an adjustment pattern for changing the width. Chest can easily change, there is an effect that the number of parts can be reduced to be mounted with the efficiency of the change setting work of the resonance frequency.

According to the present invention, the configuration is such that the open stub is provided instead of the short stub, so that the capacitance can be easily changed by the adjustment pattern, the work of setting the change of the resonance frequency can be made more efficient, and the number of components to be mounted can be increased. There is an effect that can be reduced.

According to the present invention, since a plurality of adjustment patterns are arranged on both sides of the input end of the microstrip sub-line, it is possible to have a change width of the capacitance, and it is possible to set the change of the resonance frequency. This has the effect of increasing efficiency and reducing the number of components to be mounted.

According to the present invention, the second adjusting member is disposed near the open end of the open stub and is connected to the open end with a gold wire or a gold ribbon to change the length or width of the open stub. Since it is configured to have a pattern, it is possible to change the capacitance by using an adjustment pattern provided on the input end side of the microstrip sub-line, or to change the resonance frequency by changing the inductance using the second adjustment pattern. This has the effect of increasing efficiency and reducing the number of components to be mounted.

According to the present invention, in a microwave circuit formed on a microstrip line substrate, a microstrip main line is provided with a pattern gap opposed to a side edge of the microstrip main line so as to form a capacitance. A microstrip sub-line having an input end disposed therein, a resistor having one end connected to the output end of the microstrip sub-line, an open stub of the microstrip line connected to the other end of the resistor, and the open stub Is arranged near the open end of the stub, and is provided with a trimming pattern for changing the length or width of the open stub by connecting to the open end with a gold wire or a gold ribbon. To change the resonance frequency more efficiently. There is an effect that the number of parts can be reduced to be mounted for constituting scan the pattern.

According to the present invention, a plurality of adjustment patterns are arranged vertically and horizontally in the vicinity of the open end of the open stub. To change the resonance frequency more efficiently,
Since the capacitance is configured in a pattern, the number of components to be mounted can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an equalizer according to a first embodiment of the present invention.

FIG. 2 is a front view showing a configuration of an equalizer according to a second embodiment of the present invention.

FIG. 3 is a front view showing a configuration of a conventional equalizer.

FIG. 4 is a circuit diagram showing an equivalent circuit of the equalizer.

FIG. 5 is an explanatory diagram illustrating frequency characteristics of an equalizer.

[Explanation of symbols]

1 microstrip main line, 2 microstrip subline, capacitance due to pattern gap, 4
Resistor, 5 short stub, 6, 9 adjustment pattern, 7 microstrip line board, 8 open stub, 10 high frequency microchip capacitor, 11
Gold wire, 12 Capacitor, 13 Inductor, 14
resistance.

Claims (6)

[Claims] 1. A microwave circuit formed on a microstrip line substrate, comprising: a microstrip main line; and an input end provided with a pattern gap so as to form a capacitance, facing a side edge of the microstrip main line. A placed microstrip subline, a resistor having one end connected to the output end of the microstrip subline, a short stub of the microstrip line connected to the other end of the resistor, and a microstrip subline. An adjustment pattern that is arranged near the input end and along the side edge of the microstrip main line and that changes the opposing width of the input end forming the pattern gap by connecting the input end with a gold wire or gold ribbon; An equalizer comprising: 2. The equalizer according to claim 1, further comprising an open stub instead of the short stub. 3. The equalizer according to claim 1, wherein a plurality of adjustment patterns are arranged on both sides of the input end of the microstrip sub-line. 4. A second adjustment pattern which is arranged near an open end of the open stub and is connected to the open end with a gold wire or a gold ribbon to change the length or width of the open stub. The equalizer according to claim 2 or 3, wherein: 5. A microwave circuit formed on a microstrip line substrate, comprising: a microstrip main line; and an input terminal provided with a pattern gap facing a side edge of the microstrip main line to form a capacitance. A placed microstrip subline, a resistor having one end connected to the output end of the microstrip subline, an open stub of the microstrip line connected to the other end of the resistor, and an open end of the open stub And an adjusting pattern arranged near the open end and connected to the open end with a gold wire or a gold ribbon to change the length or width of the open stub. 6. The equalizer according to claim 5, wherein a plurality of adjustment patterns are arranged vertically and horizontally near an open end of the open stub.