SU1390663A1 - Timed microwave limiter - Google Patents

Description

(21) 4149755 / 24-09

(22) 11/18/86

(46) 04.23.88. № 15 (72) Yu.A. Lazunin

(53) 621.372.852.3 (088.8)

(56) USSR Copyright Certificate No. 1146746, cl. H 01 R 1/22, 1983.

(54) AGREED MICROWAVE

(57) The invention relates to radio. technology. The purpose of the invention is to reduce losses at small levels of the input signal and to reduce the size. The microwave limiter contains a transmission line segment (OLP) 1, restrictive diodes (od) 2-4, a centered resistor (SR) 5, choke 6. The choke 7. The length of the OLP 1 is chosen equal to 1/4 of the wavelength. The resistance of the CP 5 is chosen equal to the difference of the wave resistance of the OLP 1 and the total differential. open resistance OD 2-4 at max, the input signal level. Since the length of the OLP I is equal to 1/4 of the wavelength, its resistance, recalculated from the input, is large. The input resistance of the microwave limiter is equal to the wave resistance of the ULP 1. 1 sludge.

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(About About About) with

i The invention relates to radio engineering and can be used in an RF receiving and radio transmission equipment. The purpose of the invention is to reduce losses at small levels of the input signal and to reduce the size.

The drawing shows a schematic diagram of an agreed microwave limiter.

The microwave limiter contains the cutoff 1 of the transmission line, the first end of which is the input, and the second the output of the matched microwave limiter, the first 2, the second 3 and the third 4 s | limiting diodes, a centered resistor 5, The first 6 and second 7 chokes, the length of the segment 1 is chosen equal to a quarter of the wavelength. The first 2 and second 3 limiting diodes n: are connected by one of their opposite electrodes to the second end of R I, the second electrode of the first or 1 connecting diode 2 is connected to the common bus, the second electrode of the second diode 3 is connected to; one electrode of a centered resistor 5., between the junction point of the joint and the common bus, is connected to the first rossel 6. The second choke 7 is turned on: is between the common bus and the connection point D (Ineni of the other electrode of the concentrating member resistor 5 and one electro- and in the third limiting diode 4L, the other electrode of which is connected to the first end of segment 1, while the second 3 and third 4 limited diodes are connected to the concentrated resistor 5 by the electrons with the same name

The matched microwave limiter works in the following way.

When the input signal is low, the first 2, second 3, and third 4 restrictive diodes are closed, and the signal travels without passing through segment 1.

As the input signal level increases, the first limiting diode 2 opens, closing the second end of segment 1 to the common busbar, which leads to a decrease in the transmission coefficient. A constant current rectified by the first limiting diode 2 passes through the second 3 and third 4 limit diodes and the first 6 and second 7 chokes. Differential resistance of the second 3 and third 4 og

in this case, the boundary diodes are reduced, and the concentrated resistor 5 is connected parallel to the input of a matched microwave limiter. The impedance of the centered resistor 5 is chosen equal to the difference of the impedance of the segment 1 and the total differential resistance of the open first 2, second 3 and third 4 restrictive diodes at the maximum level of the input signal. Since the length of segment 1 is equal to a quarter of the wavelength, its resistance, recalculated by the input, is large, and the input resistance of the matched microwave limiter is equal to the wave resistance of the segment, which ensures that there is no limit on the input of the matched microwave limiter.

Claims (1)

Invention Formula The matched microwave limiter, which contains a segment of the transmission line, the first end of which is the input and the second the output of the matched microwave limiter, the first, second and third limiting diodes, the centered resistor and the first choke, while the first and second limiting diodes are connected by one their opposite electrodes to the second end of the transmission line, the second electrode of the first limiting diode is connected to the common bus, the second electrode of the second limiting diode is connected to one electrode for a lumped resistor, between the junction point and the common bus, the first choke is turned on, characterized in that, in order to reduce losses at small input signal levels and reduce the size, a second choke is also connected, which is connected between the common bus and the junction point of the other electrode of the centered resistor and one electrode of the third limiting diode, the other electrode of which is connected to the first end of the transmission line segment, while the second and third limiting diodes are connected to to the centered resistor with the same electrodes, the length of the transmission line segment is chosen equal to a quarter 31390663 The wavelength, and the resistivity of the differential resistor of the metered resistor are chosen for the different, second and third limited differences of the wave impedance diodes at the maximum level of the cutting line of the transmission line and the total one. no input signal.