RU8542U1 - BROADBAND TWO CHANNEL BALANCE MIXER - Google Patents

Abstract

A broadband two-channel balanced mixer containing two converting modules, the heterodyne inputs of which are connected respectively to the first and second outputs of the quadrature bridge, the third output of the quadrature bridge is connected to the ballast load, and the input of the quadrature bridge is connected to the heterodyne input of the mixer, characterized in that it is introduced into it a second quadrature bridge, the first and second outputs of which are connected to the signal inputs of the second and first converting modules, respectively, the third output of the second quadrature th bridge connected to a second ballast load input of which the quadrature bridge connected to the signal input of the mixer, and the outputs of the first and second converting module connected to the load of the mixer.

Description

BROADBAND TWO CHANNEL BALANCE MIXER

The utility model relates to radio engineering, in particular to the radio reception technique, and can be used in panoramic survey receivers and in other wide-field usfoyegvs (biocommunication equipment).

An open-loop converter module is known, containing two diodes connected in series, the common connection point of which is connected to the load; the shod of the first diode is connected to the first terminal, and the cathode of the second diode is connected to the screw terminal of the transformer winding, the primary fanformer transformer is connected to the module heterodyne input and a common wire, the middle jack of the secondary winding of the transformer is connected to the signal input of module 1, p. 102, Fig. 5.2C, c. However, the known device does not provide keyway through the mirror channel reception.

The closest in technical essence and the achieved result to the proposed solution is a broadband double balanced mixer containing two converting modules, the heterodyne inputs of the first and second converting modules are connected respectively to the first and second outputs of the heterodyne quadrature bridge, a third the output of the heterodyne bridge is connected to the first ballast load , the input of the heterodyne bridge is connected to the heterodyne input of the mixer, the signal inputs of the first and second converting modules are connected connected to the outputs (of the rook (in-phase directional power divider), the input of the tee is connected to the signal input of the mixer, and the outputs of the converting modules are connected to the load through the second quadrature bridge containing the second ballast load 2, p. 119, Fig. 4.21. “The well-known mixer due to the characteristics of the tee has a small clear / daapain ravosh

H 03 O // 04

About the claimed broadband dual-channel balanced mixer,

containing two converting modules, whose longitudinal inputs are connected respectively with the first w with the second outputs of the quadrature bridge, “decide the output of the quadrature bridge is connected to the Dallas one, and the input of my quadrature is connected to the heterodyne input of the mixer, the second quadrature bridge is introduced, the first and the first outputs which I connect with the vital inputs of the second and first converting modules respectively, the second output of the second quadrature bridge is connected to the second ballast hub, the input of the second and is connected to the signal input of the mixer, and the output of the first w shorogo prdobrazu1oschmh modugyuy connected to the loading mixer

Zd due to the elimination of the tee and the described circuit changes, we increase the frequency range of the patioiu mixer

In Fig. 1, before the gavlon, the stasic design of the proposed broadband double-tap balanced mixer, in Fig. 2 are the transfer characteristics of the square bridge and the tee, and in Fig. 3 are the standing wave coefficients (KOV) of the square bridge and the tee in the vicinity of the normalized central chyasugy.

The mixture contains the first converting module 1 and the second converting module 2, the geodynamic inputs of which are connected respectively to the first and second outputs of the first quadrature bridge 3, the third output of the bridge 3 is connected to the first ballast fiber 4, and the input of the bridge 3 is connected to the heterodyne i (travel to which the source of heterodyne oscillations b is connected, the shnshpnye inputs of the converting modules are connected respectively to the second and main outputs of the second quadrature bridge 8, the third output of the bridge b is connected to the second ballast fiber 7, о в the course of the bridge 6 is connected to the signal input of the mixer, to which the ischek of signal oscillations 8 is connected, outputs

2

converting module 1 w module I connected to the load f).

With my i, I’m working as follows. The voltage of the local oscillator with the frequency fa, nociynatn to the input of the first bridge 3 and from its first output without phase shift

my hum; south to the heterodyne input of the first converting module 1. From the second output, the first is my 3 voltage of the local oscillator with a phase shift i / 2 is fed to the sheerodyne input of the second nourishing module 2. The voltage C1chp1ppp with frequency fs rroc walks to the input of the second bridge 6 w from its first exit without

the phase shift is fed to the signal input of the second converting module 2 ° of the second output of the second bridge; the signal voltage with a phase shift of% 12 is supplied to the signal input of the first converting module 1. Under the action of the voltages frequencies

(2ш t i) fs ± ofg, (m 0,1,2 ...; p-OL, 2, „.), (1)

moreover, the voltage delay of the combinational frequencies of the form (1) at the output of the first module (hereinafter assuming that the phase ones are delayed due to the UHcpiutoHHOCTOM of module 1 and module 2 are the same and are not taken into account when considering the operation of the mixer):

F1 (2m + 1HF8-Ti / 2) sr8, (2)

at the input of the second module 2:

 (2m l) ps ± n (rya / 2), (3)

where the initial phases of the signal m of the local oscillator at

in the home entrances

the double conversion of the clock is used {3, p.123}, the first ripeoopattOBRTonb of the frequency being up and its intermediate frequency

In this case, a useful signal forms at the output of the first module 1, which is connected with (1) for m «0,, the voltage of the intermediate frequency with phase

delay

F1 (Ј / 2 + ФЈ.)

n at the output of the second module 2, in accordance with (2), the voltage of the intermediate frequency with phase phase

(s f fg) r ФЗ + - «/ 2)

К; Well, the voltage of the intermediate frequency, formed due to the signal conversion at the outputs of module 1 and module 2, is in phase and nowadays a load of current 9 with an intermediate frequency is in phase.

The interference with the frequency of the mirror channel (4) generates an intermediate frequency voltage with a phase delay at the output of the first module 1

Ф1а (Јж -fg) фж -71 / 2-ф§, (8)

s at the output of the second module I with a phase delay

 (f fg) -Rzh - + 2. (9)

From (0) and (9) it follows that at the outputs of module 1 and module 2, the voltages of the intermediate frequency about r noise on the mirror channel are antiphase and compensate each other g on load 9. Thus, the proposed device retains the prototype property by phase suppression of reception on the mirror channel.

 ft {lV

(5) According to Fmg.Z, calculated dependences in the vicinity are given

normalized central purity Fa f / f0 transmission coefficients

(relative to the emf of the signal) of the quadrature bridge (K1kvm - to common mode output, K2kvm - to shadragurny output) and the foynik (Kg) taking into account the values of their standing wave coefficients (KSVkvm - quadrature bridge, KSW - tee, Fig.Z). The calculation of the SWR and KW is carried out under the assumption that the SWR of the converting modules is 1.3 (the value achieved in practice). To reduce the non-identity of the transmission coefficients at the outputs of the quadrature bridge, the values of its resistances of the even and odd type of oscillations are selected: z ++. 133ohm; Ј +. -10.8 Ohm {4, sph. 27-29. In this case, the intersection of the dependences K1kvm (Rn) and K2shm (Rn) occurs at points Pn1 + 0.3 when the transmission coefficients for the in-phase and quadrature outputs 1 dB are identical in the band (0.6 ... 1.4) Rn (see Figure 2)

From the dependences of Figure 2 it follows that, with limited unevenness of the transmission coefficient of 1 dB, the mixer with a wide quadrature bridge has a bandwidth normalized to f0 (Pcm) of approximately 1.26 times

than a mixer with a tee (Fri). The increase in the operating frequency range of the proposed mixer is a positive property when compared with the prototype.

Thus, the positive effect of the utility model is to increase the frequency range of the work. A positive effect is achieved due to the wetting at the inlet of the mixer of the second square bridge instead of the tee and the exclusion of the square bridge at the outlet.

Thanks to the combination of newly introduced features, the proposed broadband dual-channel balanced mixing diodes AA112A compared to the known device with frequency unevenness

5

characteristics 1 dB and intermediate frequency MHz based

experimental research has a signal frequency range of 1.57 times greater (90 ... 235 MHz versus 120 ... 200 MHz). 1. Radio receivers / Under the genus. A.P. Zhukovsky. - M .: Higher

School, 1989 .-- 343 p. .. Microwave solid-state devices in communication technology / L.G. Gassanov

A.A. Pipagov, V.V. Markov, ON. Mogalchenko. - M .: Radio and communications, 1988. 3.Red E. T. Reference manual on high-frequency circuitry. - M.: Mir, 1990 .-- 256 p.

4. Microwave electronic devices microwave / N.T. Bova, Yu.G. Efremov, V.V. Konin w. K .: Technique, 1984.-184 p.

NIGERA GURA

Applicant:

Vice-rector no HP TASUR

G.S. Sharygin

Claims (1)

A broadband two-channel balanced mixer containing two converting modules, the heterodyne inputs of which are connected to the first and second outputs of the quadrature bridge, the third output of the quadrature bridge is connected to the ballast load, and the input of the quadrature bridge is connected to the heterodyne input of the mixer, characterized in that it is introduced into it a second quadrature bridge, the first and second outputs of which are connected to the signal inputs of the second and first converting modules, respectively, the third output of the second quadrature th bridge connected to a second ballast load input of which the quadrature bridge connected to the signal input of the mixer, and the outputs of the first and second converting module connected to the load of the mixer.