Single-balance absorption type amplitude limiter

Abstract

The invention discloses a single-balance absorption type amplitude limiter. The amplitude limiter comprises a lange coupler, a first-stage geminate transistor, a second-stage geminate transistor, a third-stage geminate transistor, a fourth-stage geminate transistor, a fifth-stage geminate transistor, a sixth-stage geminate transistor, an input port, an isolation output port, a coupling output port and a straight-through output port, wherein the input port is connected with the input port of the lange coupler through a microstrip line; the isolation port of the lange coupler is connected with the isolation output port through a microstrip line; a coupling port of the lange coupler is connected with the first-stage geminate transistor through a microstrip line; the first-stage geminate transistors are connected with the second-stage geminate transistors through microstrip lines; the second-stage geminate transistor is connected with the third-stage geminate transistor through a microstrip line; the third-stage geminate transistor is connected with the coupling output port through a microstrip line; a straight-through port of the lange coupler is connected with a fourth-stage geminate transistor through a microstrip line; the fourth-stage geminate transistor is connected with the fifth-stage geminate transistor through a microstrip line; the fifth-stage geminate transistor is connected with the sixth-stage geminate transistor through a microstrip line; and the sixth-stage geminate transistor is connected with the straight-through output port through the microstrip line.

Description

technical field [0001] The present invention relates to the field of radio technology. More particularly, it relates to a single balanced absorbing limiter. Background technique [0002] The T / R component refers to the part between the video and the antenna in a wireless transceiver system, in which the receiving channel is mainly used to amplify the target reflection signal received by the antenna. The T / R component has the characteristics of high transmission power and is easily affected by the port matching state, so the receiving channel is easily affected by the transmitting power of its own T / R component; It is also facing the threat of huge external interference. [0003] The core of the receiving channel is the low-noise amplifier chip, which is extremely easy to be burned by the power emitted by the T / R component’s own transmitting channel or external electromagnetic interference signals. Therefore, it is necessary to add a protective limiter chip before the low-n...

AI Technical Summary

Problems solved by technology

The traditional reflective limiter reflects most of the received high-power signal, which is not conducive to the stability of the entire T / R component system

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