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Medium-and-long-wave antenna simulation device used for NDB and use method thereof

An analog device, medium and long wave technology, applied in measurement devices, beacon systems using radio waves, radio wave measurement systems, etc., can solve the problems of inconvenience of NDB antenna ground network, achieve a wide impedance range and strong anti-interference , the effect of high tuning accuracy

Active Publication Date: 2018-05-15
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of production debugging and teaching, it is necessary to test and verify the functions and performances of NDB transmitters, harmonic filters, antenna adapters and other equipment. However, due to factors such as size and installation site, it is inconvenient for NDB antennas to be installed in manufacturers or It is used in the teaching base, so it is necessary to design a medium and long wave antenna simulation device to replace the antenna ground grid, and complete the verification and test of NDB functional performance

Method used

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  • Medium-and-long-wave antenna simulation device used for NDB and use method thereof
  • Medium-and-long-wave antenna simulation device used for NDB and use method thereof

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] The medium-to-long-wave antenna simulation device for NDB shown in this embodiment uses technologies such as digital phase detection, numerically controlled variable inductors, variable capacitor networks, and variable tap matching transformers to jointly complete the simulation of medium-to-long-wave antennas. The medium and long wave antenna simulator device is composed of numerically controlled variable inductors, variable capacitor networks, variable tap matching transformers, servo detection components, load resistors, etc. see figure 1 shown. Among them, R s It is the internal resistance of the signal source, and it is the output impedance of the antenna adapter of the NDB system during actual use.

[0032] The numerically controlled variable inductor is used to adjust the load inductance value, including port c and port d.

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Abstract

The invention discloses a medium-and-long-wave antenna simulation device used for an NDB. The medium-and-long-wave antenna simulation device comprises a numerical control variable inductor, a variablecapacitance network, a variable tap matching transformer, a servo detection component and a load resistor. The variable tap matching transformer is used for adjusting the resistance value of the loadresistor. The variable capacitance network is used for adjusting the capacitance value. The servo detection component is used for calculating the phase difference of the voltage and the current of the two ends of the load resistor. The inductance value of the numerical control variable inductor is adjusted according to the phase difference. The antenna meeting the relevant impedance requirement within the range of the working frequency of the NDB can be simulated so as to be wide in range of simulation antenna impedance.

Description

technical field [0001] The invention relates to a radio navigation system, in particular to medium and long wave antenna simulation technology. Background technique [0002] Non-directional beacon (NDB, Non-Directional Beacon) is an all-solid-state medium and long-wave radio navigation equipment, which provides navigation signals for the airborne automatic directional machine (ADF), and can be arranged on the route (route NDB) for Aircraft navigation service can also be configured in the terminal area (terminal NDB) to provide aircraft approach and non-precision approach landing. [0003] The non-directional beacon is composed of a transmitter, a harmonic filter, a monitor, a power supply, an antenna adapter, a remote control, and an antenna ground grid. The transmitter modulates and amplifies the power of the navigation station identification code and voice information, and the harmonic filter filters out the harmonics to generate a high-power AM signal, and finally tunes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/02
CPCG01S1/028
Inventor 张俊强徐丁海
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST