Passing type power meter capable of achieving broadband power compensation by using L & C circuit

Abstract

The invention belongs to the field of radio frequency power measurement, in particular to a passing type power meter capable of achieving broadband power compensation by using an L & C circuit. A detector circuit of the passing type power meter comprises two paralleled branch circuits, wherein a first branch circuit is formed by connecting a coupling capacitance, a capacitance attenuation network and a capacitance detector branch circuit in series; and a second branch circuit is formed by connecting a coupling capacitance, a capacitance attenuation network and an inductance detector branch circuit in series. The key points of the invention are as follows: the L & C circuit is served as the detector circuit; and a one path of radio frequency power signals are respectively coupled by using a capacitance and an inductance to be divided into two paths of signals and the two paths of the signals are simultaneously detected. Since the resistance of the capacitance is inversely proportional to the frequency of a tested signal, the higher the frequency of the tested signal is, the less the resistance is; the resistance of the inductance is proportional to the frequency of the tested signal, the higher the frequency, the larger the resistance is; and the radio frequency power is in an inverse square relation with the resistance, the detector signals of the two branch circuits are synthesized in software, thereby achieving the flat measurement of the broadband radio frequency power.

Description

【Technical field】 [0001] The invention belongs to the field of radio frequency power measurement, and more specifically relates to a pass-through power meter which utilizes an L&C circuit to realize broadband power compensation. 【Background technique】 [0002] Power is an important parameter to characterize the characteristics of radio frequency signals. With the development of mobile communication technology, accurate measurement of radio frequency signal power has become an important part of wireless communication measurement. RF power meters are usually composed of power sensors (or power probes) According to the connection mode of the power meter measurement circuit, the power meter can be divided into two types: absorption type (also known as terminal type) and through type. [0003] Pass-through RF power meter (attached figure 1 ) measurement usually uses Schottky diode detection to measure the power of the radio frequency signal, the radio frequency signal is introdu...

AI Technical Summary

Problems solved by technology

The disadvantage is that the calibration time is long, a lot of equipment is required, and the frequency setting needs to be set for different test frequency points during the test. If the frequency point setting does not match the frequency of the test signal, the test error will be very large, which will affect the production and use of broadband. Type RF power meter caused a lot of trouble and uncertainty, increased production costs, and lower efficiency

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