SU1345275A1 - Attenuator - Google Patents

Abstract

The invention relates to a technique for controlling the power of microwave oscillations and S provides an improvement in the coordination in a wide frequency band and an increase in the steepness of the adjustment variable. When the control voltage source 3 is switched off, the impedances of PIN diodes 1, 2, 6, 8 simultaneously and equally change, which causes a change in the applied attenuation. The input power of the SEC signal is attenuated due to its partial absorption in FIN diodes 1, 2, 6, 8. At the same time, the entire input attenuation and output range of the device from PIN DIODES 6 and 8 is compensated by reflections from PIN DIODES 1 and 2. 1 Il. . (Uyfrp ate with 4 JV INO SL 5

Description

The invention relates to a technique for controlling the power of microwave oscillations and can be used to continuously adjust the amplitude of a signal transmitted over a microwave path.

The purpose of the invention is to improve the harmonization in a wide frequency band and increase the steepness of the control characteristic.

The drawing shows an electrical attenuator circuit diagram.

The attenuator contains the first 1 and second 2 PIN-diodes, the control voltage source 3, the first 4 and second 5 segments of the transmission line, the third PIN diode 6, the third segment 7 of the transmission line, the fourth PIN diode 8 and the fourth segment 9 of the transmission line .

Attenuator works as follows.

When the source 3 is turned on, the impedances of the first, second, third and fourth PIN diodes 1, 2, 6 and 8 simultaneously and equally change, which, in turn, causes a change in the applied attenuation. The power of the input microwave signal is weakened by HHfe due to its partial absorption in PlN diodes 1, 2, 6 and 8. At the same time, over the entire range of attenuation of the reflection power at the input and output of the attenuator from the third 6 and fourth 8 PIN diodes are compensated

Compiled by S. Vlazneva Editor A. Lezhnin Tehred D. Serdyukov Proofreader A. Obru char

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Order 4927/51 Circulation 625 Subscription

VNYIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Proektna St., 4

reflections from the first 1 and second 2 PIN-diodes.

Claims (1)

Invention Formula An attenuator containing the first and the second PIN-DIODES, connected in opposite and in series between. input and output and connected in parallel to the source of control voltage, the first and second sections of the transmission line of length I / 4, the first ends of which are connected respectively to the input and output, the third PIN diode, the anode of which is connected to the second end of the first section of the transmission line, and the cathode with a housing, characterized in that In order to improve matching in a wide band of frequencies and to increase the steepness of the regulation characteristic, the control voltage source J is connected between the anodes of the first and second PIN diodes, a third section of the transmission line of length 4 is inserted, which connects the second ends of the first and second sections of the transmission line the fourth pin diode, the anode of which connected in parallel to the point of connection of the second and third segments of the transmission line, and the cathode to the body, the fourth segment of the transmission line of length L / 4, connected between the anodes of the first and second PIN diodes.