Signal level accurate control device supporting all-standard broadband communication

Abstract

The invention discloses a signal level accurate control device supporting all-standard broadband communication, and relates to the field of wireless communication. The device comprises a first impedance matching circuit, a multi-channel pre-selection filter unit, a second impedance matching circuit, a variable voltage-controlled modulation module, a low-noise power amplification unit, an auxiliaryvariable attenuation module, a power amplification unit, a power division coupling circuit, a real-time detection circuit, a first digital amplitude stabilization unit, a second digital amplitude stabilization unit, an in-phase summation circuit and an integrated operational amplifier circuit. The multi-channel pre-selection filter unit eliminates stray interference outside the multi-system broadband signals; the double-loop level precise control loop eliminates output power errors of the system and the loop due to external environment and temperature and humidity; the signal path radio frequency unit realizes impedance matching, power amplification and attenuation of broadband communication signals. High-stability and high-precision output of broadband signals is effectively achieved through the double-loop level precision control loop principle, and the output requirements for large bandwidth and fast response of modern standard communication signals are met.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a device for precisely controlling the signal level of a full-standard broadband communication. Background technique [0002] With the continuous deepening and development of the industrialization of the new generation of broadband wireless communication technology, how to achieve high stability of downlink signals under the coexistence of multi-standard broadband communication signals such as LTE-A Pro, LTE-A, LTE, WCDMA, TD-SCDMA and GSM Accurate output is a difficult point in the field of wireless communication testing. How to realize the precise control output of the broadband signal level requires closed-loop level control of the output signal. Although traditional closed-loop level control can achieve high-precision level output, the loop bandwidth cannot meet the high-stable precision output of broadband standard communication signals with a bandwidth of up to tens o...

AI Technical Summary

Problems solved by technology

Although traditional closed-loop level control can achieve high-precision level output, the loop bandwidth cannot meet the high-stable precision output of broadband standard communication signals with a bandwidth of up to tens of MHz, and the loop response time cannot meet the uS-level response time requirements of communication signals

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