Measurement and analysis change-over device for vehicle-mounted antenna

A technology for switching devices and vehicle-mounted antennas, which is applied in the directions of measuring devices, antenna radiation patterns, and measuring electrical variables, etc. It can solve problems such as field strength mismatch of received signals and interface mismatch, and achieve convenient and accurate measurement and improve work efficiency. Effect

Inactive Publication Date: 2017-09-05
SHANGHAI DELCO ELECTRONICS & INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Antenna designers often go to the site to spend a lot of time on signal matching and analyzing the antenna effect under different signal conditio

Method used

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  • Measurement and analysis change-over device for vehicle-mounted antenna
  • Measurement and analysis change-over device for vehicle-mounted antenna
  • Measurement and analysis change-over device for vehicle-mounted antenna

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[0020] The specific embodiments of the present invention are given below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.

[0021] Please refer to figure 1 , figure 1 Shown is a schematic structural diagram of the vehicle-mounted antenna measurement and analysis adapter device according to a preferred embodiment of the present invention. The present invention proposes a vehicle-mounted antenna measurement and analysis adapter, comprising: a frequency divider 100 connected to a two-way vector signal generator 10 to receive the excitation signal sent by the signal generator 10; a f...

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Abstract

The invention proposes a measurement and analysis change-over device for a vehicle-mounted antenna, and the device comprises frequency dividers which are connected to two vector signal generators and receive the excitation signals emitted by the signal generators; a frequency mixer which is connected to the two frequency dividers, receives the signals emitted by the frequency dividers and carries out the frequency mixing, wherein the other end of the frequency mixer is connected to detected equipment; and impedance converters which are respectively disposed between the frequency dividers and the frequency mixer, and between the frequency mixer and the detected equipment. According to the invention, the device provided by the invention cooperates with a spectrum analyzer and a network analyzer, can achieve the measurement of related parameters more practically in less time, achieves the more convenient measurement of parameters of an antenna in a far-field laboratory, carries out the analysis and estimation of the key parameters in the measurement, and guarantees the testing accuracy and consistency.

Description

technical field [0001] The invention relates to the field of vehicle radio antenna testing, and in particular to a vehicle antenna measurement and analysis switching device. Background technique [0002] Car radios are divided into rod antennas and glass antennas. Due to the limitation of appearance and use conditions, the length of rod antennas is often smaller than the wavelength length, and the structure of the vehicle will restrict the antenna to be installed on the top or rear of the car, so the receiving performance of the antenna will be affected. It is reduced a lot. In order to ensure the receiving effect, there is usually a Low Noise Amplifier (LNA) to match the antenna, and the signal is sent to the radio receiver through the LNA through the feeder. The composition of the low noise amplifier mainly includes input, output matching network and DC bias network. [0003] In order to ensure that the car AM / FM radio antenna can work reliably in various environments, th...

Claims

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Application Information

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IPC IPC(8): G01R29/10G01R29/08
CPCG01R29/10G01R29/0871
Inventor 刘志强黄晓波
Owner SHANGHAI DELCO ELECTRONICS & INSTR
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