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Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method

A test method and ground station technology, applied in the direction of radio transmission system, transmission system, energy consumption reduction, etc., can solve the problems of cumbersome operation, cumbersome steps, and many links, and achieve the effect of accurate measurement, simple and reliable operation

Inactive Publication Date: 2012-10-03
10TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] First, the operation is cumbersome
The calibration tower method needs to manually transport the spectrum analyzer to the calibration tower for each test, operate the antenna to the tower, and establish a wireless link to the tower. The test involves many links and the steps are cumbersome;
[0007] Second, it is limited by the calibration tower conditions
Both the calibration tower method and the tower-less comparison method are based on the calibration tower as a prerequisite. If the calibration tower does not meet the far-field conditions, such as the antenna aperture is too large or the frequency band is too high, the test cannot be carried out
[0008] When there is no local calibration tower or the calibration tower does not meet the far-field conditions, none of the existing methods can complete the EIRP value test

Method used

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  • Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method
  • Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method

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Embodiment Construction

[0015] refer to figure 1 , the test equipment includes the ground station working equipment composed of antennas, high-power amplifiers, up-converters and integrated basebands connected in series on the same link; and the test switch network and spectrum analyzer of directional couplers connected in series on the link. The ground station is equipped with calibration and testing equipment. The antenna, high power amplifier, up-converter and integrated baseband are connected in series on the same link, and the baseband signal is sent to the high-power amplifier (high-power amplifier, HPA) through the up-converter, and the high-power amplifier amplifies the signal power and sends it to the antenna. On the link, a test switch network and a spectrum analyzer are connected in series from the directional coupler. The directional coupler extracts the uplink signal, which is switched to the spectrum analyzer through the test switch network to read the power level.

[0016] Before usin...

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Abstract

The invention provides a ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method, and aims at providing an EIRP value testing method which is simple, convenient and reliable to operate, is accurate in measurement, is free from utilizing any external system, avoids the dependence on a calibration tower and has no restriction on the aperture and the working frequency band of an antenna of the tested station. The invention adopts the technical scheme that the method comprises the steps of firstly connecting a single carrier signal outputted by a comprehensive baseband onto an inlet of an up converter (U / C), and setting a small power value of 1% to 2% rated power transmitted by a high-power amplifier (HPA); then extracting an uplink signal at an orientated coupler on the output end of the HPA, switching to a frequency spectrograph through a test switch network, and reading the power level by utilizing the frequency spectrograph; and finally calculating the EIRPs value under the small power according to the known antenna transmission gain, the feeder loss and the coupleness of the orientated coupler, so that the EIRP value of the ground station under the rated power can be deduced.

Description

technical field [0001] The invention relates to a tower-free coupling test method for the effective transmission power (EIRP value) of a ground station in the fields of aircraft measurement and control and satellite communication. The "ground station" here includes ground fixed stations, vehicle-mounted stations, and ship-borne stations. Background technique [0002] The effective transmission power (EIRP value) of the ground station, also known as the equivalent isotropic radiated power of the transmission system, is an important indicator to measure the performance of the transmission system of the ground station, and is a mandatory test item for the system acceptance and network access verification of the ground station. The larger the EIRP value, the better the system launch effect. There are two main methods for testing the EIRP value of the ground station: [0003] The first is the calibration tower method, that is, place a spectrum analyzer, calibration antenna, and...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B7/185H04B17/10
CPCY02D30/70
Inventor 柴霖
Owner 10TH RES INST OF CETC
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