RU2565382C1 - Frequency dividing unit - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: frequency dividing unit comprises wide-band bridge unit and loss compensation circuit in order to return part of energy from signals coming to ballast output of the bridge unit to power supply sources of radio sets.

EFFECT: provided independent operation of two radio sets with common antenna without limitation of operating range for each radio set.

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Description

The invention relates to the field of electrical engineering and communications and can be used for the simultaneous operation of two radio transmitters on one common antenna.

Known frequency separation devices, RF Patent No. 99675 of 11/20/2010, RF Patent No. 2266590 of 20.12. 2005, RF Patent No. 2206153 dated 06/10/2003.

The closest in technical essence is a multi-channel frequency separation device (RF Patent No. 2206153 dated 06/10/2003), containing parallel-bandpass filters connected to a common load.

A common disadvantage of both analogues and prototype is the limitation of the use of transmitter frequencies by the transparency band of the bandpass filters of the frequency separation device.

The aim of the invention is the implementation of the simultaneous operation of two radio transmitters on a common antenna without limiting the operating range of each of the radio transmitters.

This goal is achieved in that the frequency separation device for the simultaneous independent operation of two radio transmitters at different operating frequencies for the total load contains a broadband bridge device and a loss compensation circuit including a broadband matching device, a half-wave rectifier, a storage capacitor, a choke and a limiting diode, while the outputs of two radio transmitters are connected to two inputs of a broadband bridge device, the first output of a broadband bridge the second device is connected to the load resistance, and the second is connected to the broadband matching device of the noise compensation circuit, the output of the wideband matching device is connected to the input of the half-wave rectifier, the output of the half-wave rectifier is connected in parallel with the storage capacitor and to the limiting diode, the output of the limiting diode is connected in parallel to the power sources of two radio transmitters.

The block diagram of the broadband bridge is shown in FIG. one.

The designations adopted in FIG. one.

RP1, RP2 - radio transmitters 1st and 2nd, respectively;

M - broadband signal energy addition bridge;

Z _H - load resistance;

SU - matching device;

DV - a half-wave rectifier;

C is the storage capacity;

Dr. - throttle;

D is a limiting diode;

CRO - frequency separation device.

An equivalent circuit of the broadband addition bridge is shown in FIG. 2.

The designations adopted in FIG. 2.

G1, G2 - generators of high-frequency oscillations with different operating frequencies;

M - broadband bridge;

RB - ballast resistance;

Z _H - load resistance.

The operation of the device is as follows.

High-frequency signals from two radio transmitters at different frequencies f ₁ and f ₂ are fed to two inputs of a broadband bridge device that provides isolation of inputs in a wide frequency band (see Model ZI. Devices for adding and distributing high-frequency oscillation powers. M .: Sov. Radio , 1980). The energy of both signals of the radio transmitters is divided equally between the two resistances connected to the two outputs of the bridge device. When using a bridge device as a frequency separation device, a load Z _H (antenna) is connected to one of its outputs, and a circuit equivalent to ballast resistance is connected to the other. Thus, two signals are simultaneously present in the load at different frequencies f ₁ and f ₂ , the power of which is half that received at the input from the radio transmitters. Half of the power of the signals from the radio transmitters from the other output of the bridge device was received at the input of the broadband matching device SU, ensuring coordination of the output impedance of the bridge device and the input impedance of the connected circuit. The plug-in circuit is designed to return half the power of high-frequency signals to the power sources of the radio transmitters. After passing through the matching circuit, the signals pass through a half-wave rectifier DV and charge the storage capacitor C. When the voltage level at the capacitance C is exceeded, the DC supply voltage of the radio transmitters RP1 and RP2 appears, the discharge current of the capacitor C appears, which passes through the inductor Dr, which performs the function of a filter with capacitance C. low frequencies, and then goes to the power sources of the radio transmitters, returning part of the energy of the signals that did not enter the load (antenna).

Claims (1)

A frequency separation device for the simultaneous independent operation of two radio transmitters at different operating frequencies for a total load, characterized in that it contains a broadband bridge device and a loss compensation circuit including a broadband matching device, a half-wave rectifier, a storage capacitor, a choke and a limiting diode, while the outputs two radio transmitters connected to two inputs of a broadband bridge device, the first output of a broadband bridge device with It is connected to the load resistance, and the second is connected to the broadband matching device of the interference compensation circuit, the output of the broadband matching device is connected to the input of the half-wave rectifier, the output of the half-wave rectifier is connected in parallel with the storage capacitor and to the limiting diode, the output of the limiting diode is connected in parallel to the power sources of two radio transmitters.

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