JPS61111006A - Mixer - Google Patents

Abstract

PURPOSE:To obtain an intermediate frequency output even when the ratio of an RF signal frequency, a local oscillation signal and an intermediate frequency is 3:2:1, by providing an intermediate frequency short RF signal local oscillation signal open circuit and an RF signal local oscillation signal short intermediate frequency open circuit to a balanced type mixer. CONSTITUTION:The intermediate frequency short RF signal local oscillation signal open circuit using a capacitor C, a tip open line 8 and a tip short-circuit line 9 is provided to the 90 deg. hybrid side of two diodes 3, and the RF signal local oscillation signal short intermediate frequency open circuit 6 using the capacitor C, the tip open line 8 the tip short circuit line 9 is provided to one side of the diodes 3. Thus, the RF signal and the local oscillation signal are fed to diodes D1, D2 without being short-circuited between the 90 deg. hybrid and the two diodes 3 and the generated intermediate frequency is obtained all from an output terminal.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention consists of a microstrip line,
A 90' hybrid with one input terminal and two output terminals, two diodes connected in opposite directions to the two output terminals of the 90° angle, and two diodes connected to the 90' hybrid side of these two diodes. This invention relates to a balanced mixer consisting of an intermediate frequency short circuit, a F signal station oscillation signal short circuit connected to one side of two diodes, and an output terminal connected to the BP signal station oscillation signal short circuit side of two diodes. It is something.

[Conventional technology]

First, let us explain the principle of this type of mixer. @Figure 3 is a conceptual diagram of the mixer that is the basis of this invention. - circuit, (3) is a diode DζD2. (4)
is an RF signal local oscillation signal C-1) circuit, terminal 1 is an aFF input terminal, terminal 2 is a local oscillation signal input terminal, and terminal 3 is an intermediate frequency output terminal.

The fourth factor is the circuit board diagram that shows the conceptual configuration diagram shown in FIG. 3 in a concrete pattern diagram. Divided into two by hybrid (1), diode DL D2
(3) RF signal station oscillator signal short circuit (4)
short circuit. Furthermore, the intermediate frequency generated by the diodes Di and D2 (3) is transmitted to the intermediate frequency sheet circuit (2) at a frequency of 90".
It does not proceed toward the hybrid (1) direction, but is output from the terminal 3. [Problems to be Solved by the Invention] The circuit configuration of the conventional mixer as described above has the following problems.

几F signal frequency ° local oscillation signal frequency: ratio of intermediate frequency is 3
:2:1, the open-ended line with 1/4 wavelength of the intermediate frequency becomes the open-ended line with 2/4 wavelength of the 6-station signal frequency and 3/4 fjL length of the RFF signal frequency. Therefore, the intermediate frequency short circuit (2) using an open-ended line of 1/4 wavelength of the intermediate frequency also has a
It becomes a circuit. In addition, the F signal station oscillation signal sheet circuit (4) uses an open-ended line with 1/4 wavelength of the local oscillation signal frequency.
does not become a complete shunt circuit for the RF multiplied signal.

In this conventional circuit, the RF double signal input from the terminal is short-circuited in the intermediate frequency sheet circuit (2) and cannot be supplied to the RF double signal diode DL D2 (31), so no intermediate frequency output can be obtained. There was a problem.

This invention was made to solve this problem, and it is possible to obtain an intermediate frequency output even when the ratio of the ILF signal frequency, two local oscillation signal frequencies, and the intermediate frequency is 3:2:1. With the goal.

[Means for solving problems]

The mixer according to the present invention has an intermediate frequency (show) RF signal local signal open circuit using a capacitor, an open-ended line, and a short-circuited line on the 90° hybrid side of two diodes, and a capacitor and an open-ended line on one side of the diode. This is a one-time circuit for shorting intermediate frequency signals from an RF signal station using a short-circuit line and a short-circuit line at the end.

[Effect]

In this invention, an intermediate station wave sheet and a PLF signal station oscillator signal open circuit are provided on the 90° high prebutton side of the two diodes, and in a good example, an RF signal station oscillator signal short intermediate frequency circuit is provided. Therefore, the RF signal and local oscillator signal are supplied to the 90° hybrid and the diodes DI and D2 without being short-circuited between the two diodes, and all intermediate frequencies generated are obtained from the output terminal.

〔Example〕

FIG. 1 is a conceptual diagram of the configuration of a mixer that is a feature of the present invention, in which (1) is a 90° high prebutton, (5
) is an intermediate frequency short RF signal station oscillation signal open circuit,
(3) is the diode DLD2. +6) is a short intermediate frequency open circuit for the F signal station oscillation signal, and terminal 1 is R
The FF input terminal, terminal 2 is a local signal input terminal, and terminal 3 is an intermediate frequency output terminal.

FIG. 2 is a circuit board diagram showing a specific pattern diagram of the structural conceptual diagram shown in FIG. WJ1. In the same figure, (7) is a nine RF signal short intermediate frequency open circuit using an open end line and capacitor C, and (8) is an RF signal wave number 3/8.
A line with the same wave number as the wavelength (178 wavelengths), (9) has an RF signal frequency of 3/4 wavelength and 0 local oscillation signal frequency of 2/4 wavelength.

Short circuit line with intermediate frequency 1/4 wavelength, RF signal frequency 3/8 wavelength 0 local oscillation signal frequency 1/4 wavelength, intermediate frequency 1
/8 wavelength line.

intermediate frequency show), RF signal station oscillator signal open circuit (5
) is RF signal short, intermediate frequency open circuit (7)
By connecting the line (8) in series with the short-circuited line (9) in parallel, and connecting the line length in series with this, there is a short circuit at the intermediate frequency and a short circuit at the RF signal local signal frequency. becomes an open circuit. In addition, the 几F signal station oscillation signal is shorted, the intermediate frequency oven circuit (6) is shorted, and the 几F signal is shorted.
A short-circuited end line (9) is connected in parallel to the intermediate frequency oven circuit (7).
), the circuit becomes a short circuit for the RFF No. 1 local oscillation signal frequency and an open circuit for the intermediate frequency.

The RF signal input from terminal 1 and the local oscillator signal input from terminal 2 are divided into two by the 90° hybrid (1),
The ratio of F signal frequency: local signal frequency: intermediate frequency is 3
: Even in the case of 2:1, the diode DζD2 (31) is supplied to the RF signal open source short circuit, and the intermediate frequency open circuit (6) is short-circuited.
(The intermediate frequency generated at 31 is an intermediate station wave.

90°j by F signal 0 station oscillation signal open circuit (5)
It does not go in the direction of Hypribut (1) and comes out from terminal (3). 6゜[Effect of the Invention] As described above, according to the present invention, even when the ratio of RFF frequency: local oscillation signal frequency: intermediate frequency is 3:2:1, the 900 RF signal input to the 900 Hypribut The local oscillator signal is supplied to the two diodes without being shorted.

There is an effect that only the intermediate frequency generated by the diode is outputted from the terminal 3 without being lost elsewhere.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of the configuration of a mixer according to the present invention, Figure 2 is a circuit pattern diagram of a mixer according to the invention, Figure 3 is a conceptual diagram of the configuration of a mixer that is the basis of this invention, and Figure 4 is the basis of this invention. FIG. 2 is a circuit pattern diagram of a mixer. In the figure, (1) is a 90° hybrid, (2) is an intermediate frequency short circuit, and (3) is a diode DL D2. (41
is an RF signal station oscillation signal short circuit, (5) is an intermediate frequency signal station oscillator, 几F signal station oscillation signal open circuit, (6) is aF
Signal station oscillator signal short, intermediate frequency open circuit, (7)
is F signal ship, intermediate frequency open circuit, (8) is line, (9) is short-circuit line at the end, ALH line. Terminal 1 is an F signal input terminal, terminal 2 is a local signal input terminal, and terminal 3 is an intermediate frequency output terminal. Note that the same parts in FIG. 1 are designated by the same reference numerals.

Claims (1)

[Claims] A 90° hybrid with two input terminals and two output terminals composed of microstrip lines,
Two diodes connected in opposite directions to the two output terminals of the 90° hybrid, an intermediate frequency short circuit connected to the 90° hybrid side of these two diodes, and an intermediate frequency short circuit connected to one side of the two diodes. In a balanced mixer consisting of an RF signal local oscillator signal short circuit and an output terminal connected to the RF signal local oscillator signal short circuit side of two diodes, the 90°
An intermediate frequency short circuit using a capacitor, an open-ended line, and a short-circuited line, and an RF signal station oscillation signal open circuit are installed on the hybrid side, and an RF signal using a capacitor, an open-ended line, and a short-circuited line is installed on one side of the diode. A mixer characterized by having a local oscillator signal short circuit and an intermediate frequency open circuit.