SU362400A1 - PAT? YTy (MNSH? 0§Yes of the library - Google Patents

Description

one

The invention relates to the field of microwave radio engineering and can be used in amplification and multiplying chains of microwave generators.

Known frequency multipliers contain input bandpass filters and a connecting line, to which cables there are connected two varactor diodes interconnected by segments of dividing lines.

However, the known multipliers do not provide isolation between sources of input signals.

In order to provide isolation between the sources of input signals in the proposed device, the filters are electrically connected to the dividing line segments, and the ends of the connecting line are additionally connected to the ends of the connecting lines of a quarter wavelength of the input signal.

The drawing shows the scheme of the proposed frequency multiplier.

The proposed frequency multiplier consists of an input /, a nolosovogo filter 2, a transforming segment of line 3, a connecting line 4, .BaipaiKTopiHoiro disa 5, a separation line 6, varactor diodes 7 and 8, a dividing line 9, a varactor diode 0. output price //, band filter 12, input 13 and separating devices M and 15.

The proposed multiplier has two inputs / and 13 connected to the corresponding bandpass filters 2 and 12, which are electrically connected to the separating lines.

5 and 5, respectively. Varactor diodes are connected to both ends of the dividing lines 6 and 9: diodes 5 and 7 are connected to line 6, diodes 8 and 10 are connected to line 9, diode 5 and separating device 14 are connected to one end of connecting line 4, to the other end - diode W, separating device 15 and output circuit //.

Two cohereit signals of equal power are fed to the adiever. One signal and enters the input / and further through the band-pass filter 2 to the dividing line 6 and varactor diodes 5 and 7; another signal is received on the input 13, the band-pass converter 12, dividing line 9 and varactor diodes 8 and 10. The dimensions of dividing lines 6 and 9 are chosen so that, on the one hand, lines 6 and 9 together with pairs of diodes 5 and 9 7 and 8 and 10 resonate at the frequency of the input signal, and on the other - at the frequency of the output signal.

The separating devices 14 and 15 short-circuit at the frequency of the input signal the points of connection of the diodes 5 and 10 to the connecting line 4, as a result of which the latter does not affect

the work of dividing lines 6 and 9, except

Moreover, at the same frequency, the sources of coherent signals are separated relative to each other. These devices do not affect the output signal. Devices 14 and 15 can be made, in example, in the form of open or short-circuited line segments of certain dimensions, having a large reactance of the input at the output frequency (idle mode), and at the input signal frequency - small (short-circuit mode).

For a frequency doubler, devices 14 and 15 may use an open-ended line segment for a quarter-wavelength of the input signal. For frequency multipliers, three or more times as the devices 14 and 15 may be one end of the line segment closed in a quarter-wavelength of the output signal.

The dimensions of the connecting line 4 are chosen in such a way that resonance is ensured.

on the output frequency. The output signal is taken from the connecting line 4 via the output circuit 11.

When calculating the connecting line 4 in the proposed device, you can optionally choose either the length of this line or its characteristic impedance.

The invention

A frequency multiplier containing input bandpass filters and a connecting line, to the ends of which are connected two varactor diodes interconnected by dividing line segments, characterized in that, to ensure isolation between the input sources, the filters are electrically connected to the dividing line segments , and the ends of the connecting line are additionally connected open at the end of the line segments, a quarter-wavelength of the input signal.

P 1 11 III f 12