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Coupling and detection circuit

A coupled detection and circuit technology, applied in the field of coupled detection, can solve problems affecting measurement, signal interference, and weak signals, and achieve the effects of suppressing measurement errors, eliminating common-mode noise and thermal effects, and improving detection quality

Active Publication Date: 2017-01-25
CHNEGDU CHIFFO ELECTRONICS INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As a key component in the RF power reflectometer, the coupling detector greatly affects the measurement accuracy. When the measured power has a large dynamic range and at the same time, in order to ensure extremely small insertion loss, it is coupled to the detector diode during low power measurement The signal on the signal is very weak, and the coupling detection used by the existing coupling detector is relatively complicated, and signal interference often occurs during signal processing, resulting in inaccurate detection data and affecting subsequent measurements

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  • Coupling and detection circuit

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Embodiment 1

[0012] figure 1 Shown is the coupling detection circuit diagram of the present invention, including isolation resistor R1, one end of the isolation resistor R1 is grounded, the other end is connected to the coupling bracket S1, the other end of the coupling bracket is connected to the inductor L1, and the other end of the inductor L1 is connected to the capacitor C2, a first attenuation resistor R4, the other end of the capacitor C2 is connected to a second attenuation resistor R6, the other end of the second attenuation resistor R6 is grounded, and the other end of the first attenuation resistor R4 is connected to the cathode of the first diode D1, The anode of the one diode D1 is connected to the first detecting resistor R7 and the second detecting resistor R8, the other end of the first detecting resistor R7 is connected to the anode of the second diode D3, and the cathode of the second diode D3 is grounded. The other end of the second detecting resistor R8 is connected to t...

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Abstract

The invention discloses a coupling and detection circuit which comprises a signal coupling circuit and a detection circuit. A coupling bracket couples a signal into the detection circuit to detect the signal; and meanwhile, the detection circuit improves the detection quality of the signal by adopting a diode double-balanced circuit, eliminates common-mode noise and the heat effect and suppresses a measurement error caused by even harmonics of an input signal.

Description

Technical field [0001] The present invention relates to the field of coupled detection, in particular to a coupled detection circuit. Background technique [0002] Power reflectometers are usually used to measure the power of radio frequency (RF) or microwave frequency (MW) signals. Typical power reflectometers use power detectors or transducers to convert RF or MW power into electrical parameters that can be easily measured. Power reflectometers also have applications in many types of RF and MW systems. [0003] As a key component of the RF power reflectometer, the coupled detector greatly affects the measurement accuracy. When the measured power has a large dynamic range and at the same time to ensure a very small insertion loss, it is coupled to the detector diode when measuring at low power. The signal on the above is very weak, and the existing coupled detector uses a more complicated coupled detector, and signal interference often occurs during signal processing, resulting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/00G01R15/00
CPCG01R15/00G01R21/00
Inventor 李杰何兴凤
Owner CHNEGDU CHIFFO ELECTRONICS INSTR