Radio frequency power detection circuit and electronic equipment

Abstract

The embodiment of the invention provides a radio frequency power detection circuit and electronic equipment, and relates to the technical field of radio frequency circuit design. The differential input end of the radio frequency power detection circuit can be directly connected with the differential output end of a power amplifier, so that the output power of the power amplifier can be directly and accurately detected, and the influence of load balance and impedance change on the power detection precision is reduced; the output signals of a first square law operation circuit and a second square law operation circuit are added through a first additive operation circuit, odd harmonics in the output signals are offset, the area of a low-pass filter circuit is reduced, the power detection output precision is improved, an operation amplification module and an index operation module form a current feedback loop, high-precision logarithmic operation is achieved, the root mean square value of the output voltage and the root mean square value of the input power are in a logarithmic linear relation, high-dynamic-range power detection is achieved, and meanwhile the range of the output voltage can be effectively widened through the direct-current amplification module.

Description

technical field [0001] The invention relates to the technical field of radio frequency circuit design, in particular to a radio frequency power detection circuit and electronic equipment. Background technique [0002] In application scenarios such as millimeter-wave satellite communication and 5G communication, due to large free space loss, rain attenuation, and atmospheric attenuation, it is usually necessary to use large-scale phased array and other technologies to increase the equivalent isotropic radiation power of the transmitting array. In large-scale phased arrays, affected by factors such as process deviations, temperature changes, power supply voltage drops, and complex electromagnetic environments, there are certain deviations in the radio frequency performance of different channels, and the performance of the array is also deteriorated. In order to detect the working status of the channel in real time and perform corresponding compensation, it is necessary to inte...

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Problems solved by technology

[0003] Existing power detection modules are usually designed for lower frequency band applications. When used in millimeter wave large-scale phased arrays, there are the following problems: existing power detection modules are usually designed for single-ended input, and the parasitic parameters of millimeter wave frequency bands have a greater impact , the fundamental wave and harmonics of the radio frequency signal are coupled to the power network and output signal through parasitic capacitance, which affects the normal operation of other circuit modules and reduces the power detection accuracy; the existing power detection module usually has a linear relationship between the output voltage and the input common rate, which is difficult Realize high dynamic range, high precision power detection

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