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Airborne systems and methods for characterization and measurement of antennas or radiating systems

一种辐射系统、天线的技术，应用在通信系统,处理辐射的电磁场领域，能够解决飞行器失去控制、削弱、破坏运行能力等问题

Active Publication Date: 2019-12-17
UNIVERSITY OF OVIEDO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

however, the existence of antennas and multi-band radiating systems, as well as constraints on the frequencies used to use the radio spectrum to establish communication devices between UAVs and ground stations, limit the flexibility of frequency selection for these devices
In the event of overlapping frequencies, communications between the UAV and ground stations may be disrupted, resulting in partial or complete loss of control of the vehicle, thereby impairing or destroying its ability to operate
This problem is exacerbated in the case of antenna measurements, because in the case of frequency overlap, the antenna under test transmits more power than the transmitter used for communication between the aircraft and the ground station

Method used

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  • Airborne systems and methods for characterization and measurement of antennas or radiating systems
  • Airborne systems and methods for characterization and measurement of antennas or radiating systems
  • Airborne systems and methods for characterization and measurement of antennas or radiating systems

Examples

Experimental program
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example 1

[0101] A first example of an embodiment of the invention is based on the use of a single aeronautical module (1) for the measurement and characterization of an antenna or radiating system (5) consisting of the GSM-900 frequency band (890MHz to 960MHz frequency band) The mobile phone base station antenna in , which consists of clusters of eight patch-like elements arranged along a vertical axis perpendicular to the ground (60), has a physical length of 1 m. The aeronautical module (1) used is a drone of the multi-rotor type, more specifically an octorotor with its corresponding aeronautical control unit (15) and a set of batteries. The Aeronautical Control Unit (15) is realized and programmed by a microcontroller (Raspberry Pi type) to collect information from the Electromagnetic Emission Measurement Unit (11) and the Positioning and Guidance System (13) to control the flight of the Aeronautical Module (1) parameters and exchange information with the ground station (2).

[010...

example 2

[0124] For this embodiment, the system described in Example 1 is used, but using a coherent detector in the 100 MHz to 3 GHz band with two output channels corresponding to the real and imaginary parts of the complex signal being measured, where In this case, the complex signal is the electromagnetic field (E) radiated by the mobile phone base station antenna. Each output channel provides a voltage proportional to the real and imaginary parts of the radiated electromagnetic field (E).

[0125] Since the weight of the coherent detector used is greater than that of the power detector, the articulated arm for installing the receiving antenna (112) is also omitted in this embodiment, and it is directly attached to the aeronautical module (1). In this embodiment, the positioning and guidance system (13) of the aeronautical module (1) is responsible for keeping the receiving antenna (112) oriented towards the mobile phone base station antenna throughout the measurement path (7).

[...

example 3

[0130] For this example, the system described in example 1 was used, but with two aeronautical modules (1). Two measurement paths (7) are defined: the first one consists of a zigzag path contained in a 6m x 6m vertical plane located 5m in front of the antenna plane (62) of the mobile phone base station antenna and relative to the antenna centered. The second one is the same as the first one, but the second one is deployed 5m behind the aperture plane (62) to characterize the backward radiation of the mobile phone base station antenna. In this embodiment, by using power detectors in both aeronautical modules (1), an iterative phase recovery algorithm (40) needs to be applied.

[0131] It can be seen that with more measurement points, the iterative phase recovery algorithm (40) needs to perform 45 iterations to obtain the theoretical electromagnetic field amplitude calculated according to a set of auxiliary coefficients and the amplitude of the radiated electromagnetic field (E...

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PUM

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Abstract

The invention relates to an airborne system and method for the measurement and characterization of a radiating system or antenna (5), comprising: an aeronautical module (1) including an electromagnetic emission measurement unit (11) which captures the radiation emitted by the radiating system or antenna ( 5) the radiated electromagnetic field (E), and the positioning and guidance system (13), with an accuracy equal to or less than 3 cm; and the ground station (2), including a processing unit (23) for electromagnetic emission measurement, which is passed through a set of electromagnetic emission A measurement processing algorithm (25) processes the measurements. The invention also relates to a method for measuring and characterizing a radiation system or antenna (5). The invention is applicable in fields requiring the characterization or measurement of antennas, such as, for example, radar and radio navigation aids, terrestrial and satellite based telecommunication systems, or terrestrial broadcasting installations.

Description

technical field [0001] The invention relates to an on-board system and method for the characterization and measurement of antenna or radiation systems, comprising at least one aeronautical module, a ground station and a communication system between the elements. The invention also relates to a method of processing radiated electromagnetic fields in order to obtain an electromagnetic field distribution at the aperture of the antenna under test or radiation system, from which a diagnosis of the antenna under test and its radiation pattern as well as the electromagnetic shield can be performed. [0002] The invention is applicable in fields requiring the characterization or measurement of antenna or radiating systems, such as radar and radio navigation systems, terrestrial and satellite telecommunications systems or terrestrial broadcasting facilities. Background technique [0003] The development of unmanned aerial vehicle technology such as UAV, UAV (Unmanned Aerial Vehicle),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10
CPCG01R29/10H04B17/102B64U10/16B64U2101/30B64C39/024G08G5/0095H04B7/18506B64U10/13B64U2101/00B64U2201/10B64U2201/20
Inventor 尤里·阿尔瓦雷斯·洛佩兹玛丽亚·加西亚·费尔南德斯费尔南多·拉斯-赫拉斯·安德烈斯安娜·阿波利亚·阿波利亚博尔哈·冈萨雷斯·瓦尔德斯约兰达·罗德里格斯·瓦奎罗安东尼奥·加西亚·皮诺
Owner UNIVERSITY OF OVIEDO
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