SU1529407A1 - Mixer with phase suppression of image channel - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to simplify the design. In the mixer with phase suppression of the mirror channel, the received signal enters the phase to the nonlinear quadrupoles 2 and 3 through the hybrid power divider 1. The signal of the local oscillator through the quadrature hybrid bridge 4, frequency dividers 9 and 10 and the capacitors 7 and 8 of the quadrature bridge 6 of the intermediate frequency is fed to the quadrupoles 2 and 3. The intermediate frequency signals of the main and mirror channels, taken from the quadrupoles 2 and 3, after phase separation in the bridge 6 are fed to the corresponding inputs of the separators 9 and 10, which provide isolation of the local oscillator circuit and intermediate frequency. 1 il.

Description

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The invention relates to radio engineering and can be used in receiving devices.

The purpose of the invention is to simplify the design.

The drawing shows a block diagram of the mixer with the phase suppression of the mirror channel.

The mirror channel phase suppressor mixer contains a dielectric board on which hybrid power divider 1 is located, the input of which is a signal input, and the outputs are connected to the first inputs of nonlinear quadrupoles 2 and 3, respectively, the hybrid hybrid bridge 4, one of the inputs of which is the input of the local oscillator, the other input is loaded on the matched load 5, quadrature bridge

6 intermediate frequency, made in the form of a transformer with capacitive coupling of the ends of its windings, made with the help of capacitors

7 and 8, as well as frequency dividers 9 and 10, the first inputs of which are connected respectively to the outputs of the quadrature hybrid bridge 4, and the second inputs - to the outputs of the quadrature intermediate frequency bridge 6, the inputs of which are connected to the second inputs of the non-linear four-port network

2 and 3, respectively, while the output of one of the frequency dividers 9 or 10 is the output of the intermediate frequency of the main channel, and the output of the other is the output of the intermediate frequency of the image channel.

The mixer with the phase suppression of the mirror channel works as follows.

The received signal enters the phase to the non-linear quadrupole 2 and 3 through the hybrid power divider 1. LO signal through quadrature hybrid bridge 4, frequency

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Separators 9 and 10, capacitors 7 and 8 of the quadrature bridge of intermediate frequency 6 are fed to nonlinear quadrupoles 2 and 3, shifted in phase by 90. The intermediate frequency signals of the main and mirror channels, taken from the nonlinear quadrupoles 2 and 3, after phase separation in the quadrature bridge 6 of the intermediate frequency arrive at the corresponding outputs of frequency dividers 9 and 10, which provide isolation of the local oscillator and intermediate frequency.

Claims (1)

Invention Formula A mirror channel phase suppressor mixer containing a dielectric board on which a quadrature hybrid bridge is located, one of the inputs of which is a heterodyne input and the other is loaded on a matched load, a hybrid power divider whose input is a signal input, and the outputs are connected to the first the inputs of the first and second nonlinear quadrupoles, respectively, and an intermediate frequency quadrature bridge, the first and second frequency dividers, characterized in that, in order to simplify the design the inputs of the quadrature intermediate frequency bridge are connected to the second inputs of non-linear quadrupoles, and their outputs are connected to the second inputs of the first and second frequency dividers, the outputs of the quadrature hybrid bridge are connected to the first inputs of frequency dividers, the output of one of which is the output of the intermediate frequency of the main channel, and the output of another frequency splitter is the output of the intermediate frequency of the mirror channel, while the quadrature bridge of the intermediate frequency is implemented in the form of a transformer with a capacitance oh bond all its windings.