CN115085825A - Equivalent omnidirectional radiation power measuring device and measuring method - Google Patents
Equivalent omnidirectional radiation power measuring device and measuring method Download PDFInfo
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- CN115085825A CN115085825A CN202210644991.1A CN202210644991A CN115085825A CN 115085825 A CN115085825 A CN 115085825A CN 202210644991 A CN202210644991 A CN 202210644991A CN 115085825 A CN115085825 A CN 115085825A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides an equivalent omnidirectional radiation power measuring device and a measuring method, wherein the measuring device comprises a fixing platform for fixing equipment to be measured; and a receiving platform for fixing the receiving antenna; the receiving platform is configured to be movable relative to the fixed platform along a first direction to adjust a distance between the receiving antenna and the device under test. When the equivalent omnidirectional radiation power is measured, the measuring device can effectively avoid the influence of the environment on the measuring result, and realize the accurate measurement of the equivalent omnidirectional radiation power.
Description
Technical Field
The invention relates to the technical field of wireless communication. And more particularly, to an equivalent omni-directional radiation power measuring apparatus and method.
Background
The equivalent omnidirectional radiation power is an important index for measuring the radiation operating characteristics of an antenna system, and is expressed as the product of the transmission power and the transmission gain. In the conventional equivalent omnidirectional radiation power measurement, an antenna part and a power feed-in part are separated, and the gain of the antenna and the value of the power feed-in are measured respectively, so that the equivalent omnidirectional radiation power is calculated. With the development of technology and high integration of antennas, the antenna portion and the power feeding portion sometimes cannot be separated and do not have a separate test port. Therefore, it is necessary to measure the equivalent omnidirectional radiation power of the antenna portion and the power feeding portion as a whole.
With the continuous improvement and deepening of the antenna technology, in recent years, many units propose a measurement method of equivalent omnidirectional radiation power, and promote the development and evolution of related measurement technologies. The test of the equivalent omnidirectional radiation power at home and abroad has already a certain research foundation, and the test is mainly carried out by methods such as towerless coupling, double-station comparison and the like in the aspect of measuring the equivalent omnidirectional radiation power of a base station. For testing schemes in a full-wave microwave darkroom, the existing research is mainly focused on the mobile terminal part. The existing methods comprise methods of multiple probes, direct far field and the like, and the purpose of the test is to research the external radiation capability of the mobile terminal or the mobile base station. The existing measuring device utilizes a separated testing method to ensure that the antenna gain has certain nonlinear change when the power feed-in is changed, and meanwhile, the power feed-in and the antenna standing wave are mutually influenced, so that the error introduced by the existing measuring device is larger. Although this problem can be avoided by using the integral test method, the integral test method introduces more environmental impact and errors.
Disclosure of Invention
In order to solve the above problems, the present invention provides an equivalent omnidirectional radiation power measuring device, which can effectively avoid the influence of the environment on the measurement result when measuring the equivalent omnidirectional radiation power, and realize the accurate measurement of the equivalent omnidirectional radiation power.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an equivalent omnidirectional radiation power measuring device, comprising:
the fixing platform is used for fixing the equipment to be tested; and
a receiving platform for fixing a receiving antenna;
the receiving platform is configured to be movable relative to the fixed platform along a first direction to adjust a distance between the receiving antenna and the device under test.
Furthermore, it is preferable that the measuring device includes a guide rail provided in a first direction; the receiving platform is configured on the guide rail through a sliding block.
In addition, it is preferable that the measuring apparatus further includes a driving motor for driving the receiving platform to move on the guide rail in the first direction.
In addition, it is preferable that the receiving platform includes a supporting frame and a supporting member fixed to the supporting frame to support the receiving antenna; the support is configured to make height and attitude adjustments to the receiving antenna.
Furthermore, it is preferable that the receiving platform further includes a supporting pipe to support the supporting member; the supporting pipe is an aluminum alloy pipe; the surface of the supporting tube is covered with an electromagnetic wave absorbing material.
Further, it is preferable that the support pipe includes an inclined portion fixed in combination with the support frame and a straight portion fixed in combination with the support;
and a reinforcing structure is arranged at the joint of the straight part and the inclined part.
In addition, it is preferable that the measuring apparatus further includes a test device connected to the receiving antenna by a cable.
Furthermore, it is preferred that the ends of the guide rails are provided with a buffer structure for cooperation with the receiving platform.
The invention also provides a measuring method based on the equivalent omnidirectional radiation power measuring device, which comprises the following steps
Obtaining the distance between the equipment to be tested and the receiving antenna according to the position of the equipment to be tested and the position of the receiving antenna;
the device to be tested outputs signals, and the receiving antenna receives the signals output by the device to be tested;
analyzing the signals received by the receiving antenna by using the test equipment to obtain analysis data of the test equipment;
adjusting the distance between the receiving antenna and the equipment to be tested so as to obtain different distance data and analysis data of the testing equipment at different distances;
obtaining a group of equivalent omnidirectional radiation power measurement results according to different distance data and analysis data of the test equipment at different distances;
a set of equivalent omniradiation power measurements is analyzed to obtain a determined equivalent omniradiation power result.
In addition, it is preferable that the analyzing the set of equivalent omni-directional radiation power measurement results to obtain a determined equivalent omni-directional radiation power result further includes removing coupling interference in the set of equivalent omni-directional radiation power measurement results by means of polynomial fitting to obtain an accurate equivalent omni-directional radiation power result.
The invention has the beneficial effects that:
the invention adjusts the distance between the receiving antenna and the equipment to be measured by matching the fixed platform and the receiving platform and moving the position of the receiving platform relative to the fixed platform, avoids the influence of the measuring environment on the measuring result by adding an extrapolation mode for adjusting the distance on the basis of the integral equivalent omnidirectional radiation power measuring method, has accurate and reliable measuring result, can be simultaneously suitable for the separated and integral equivalent omnidirectional radiation power measuring methods, enlarges the using range, has simple and convenient measuring mode and highly automatic system, and greatly saves the measuring time.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of the receiving platform of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The existing measuring methods are mainly separated measurement and integral measurement. Considering that the antenna standing wave is an inherent parameter of the antenna itself, the antenna standing wave affects the magnitude of the fed power. Meanwhile, the gain of the antenna during actual operation is affected by the fed power, so that the error of the separate measurement is large. The integral test mode needs to consider the influence possibly brought by the dead zone uncertainty of the whole-wave microwave darkroom and the internal reflection of the darkroom, the influence of the part is limited by practical conditions and can only be estimated, and the error of the part becomes very large under the specific reflection condition.
In order to achieve an accurate measurement of the equivalent omni-directional radiated power. The invention provides an equivalent omnidirectional radiation power measuring device, which is shown in fig. 1 to fig. 2, and specifically comprises: a fixing platform 10 for fixing a device 11 to be tested; and a receiving platform 20 for fixing a receiving antenna 21; the receiving platform 20 is configured to be movable along a first direction relative to the fixed platform 10 to adjust a distance between the receiving antenna 21 and the device under test 11, as can be seen from fig. 1, the X direction is the first direction, and the X direction is perpendicular to the Y direction.
It should be noted that the receiving platform 20 is fixed with a receiving antenna 21 covering a frequency band corresponding to the device under test 11, and the device under test 11 is installed at the same horizontal height (Y direction) opposite to the receiving antenna 21. The receiving antenna 21 and the device 11 to be tested need to be located in a quiet zone of a darkroom, a proper test frequency band is selected, and peak data when the device 11 to be tested is over against the receiving antenna 21 is recorded. The data corresponds to a reading obtained by the antenna port, the receiving antenna 21 and the cable between the receiving antenna 21 and the spectrometer after the equivalent omnidirectional radiation power of the device 11 to be measured is spatially attenuated, and then the equivalent omnidirectional radiation power enters the spectrometer.
In addition, the measuring device supports the inseparable integral measurement of the antenna part and the power feed-in part, the equivalent omnidirectional radiation power measurement is realized through the matching of the receiving platform 20 and the guide rail 30, the influence of the site environment is avoided through an extrapolation mode (namely a mode of moving the receiving platform along the first direction), so that the accurate equivalent omnidirectional radiation power is obtained, namely, the integral measuring method is adopted and the extrapolation mode is matched for correction, so that a better measuring result can be obtained, the influence of the environment is effectively avoided at the same time based on the integral measuring method, and the accurate measurement of the equivalent omnidirectional radiation power is realized.
In a particular embodiment, the measuring device comprises a guide rail 30 arranged in a first direction; the receiving platform 20 is configured on the guide rail 30 through a sliding block, wherein the receiving antenna 21 of the corresponding frequency band is located on the receiving platform 20 capable of sliding on the guide rail 30.
Further, measuring device is still including being used for driving receiving platform 20 and being in along the driving motor of first direction motion on the guide rail 30, can realize through the aforesaid setting that accurate control and operation to receiving platform 20 and receiving antenna 21 position on the guide rail 30 are more convenient, and the practicality is strong moreover, and it all can be accomplished by measurement control system is automatic to leave measuring step and data processing after carrying out the alignment of equipment to be measured 11 and receiving antenna 21, has saved measuring time greatly, and the measuring time prediction is no longer than 3 hours.
In one embodiment, the receiving platform 20 includes a supporting frame 22 and a supporting member 23 fixed to the supporting frame 22 for supporting the receiving antenna 21; the support 23 is configured to be height and attitude adjustment in the Y direction of the receiving antenna 21. Specifically, the antenna polarization adjustment is designed to be of a standard card slot structure, so that the antenna polarization direction can be adjusted more conveniently and rapidly.
In one embodiment, the receiving platform 20 further includes a support tube 24 for supporting the support member 23; the support tube 24 is an aluminum alloy tube; the surface of the supporting tube 24 is covered with an electromagnetic wave absorbing material. The support tube 24 is an aluminum alloy tube with high quality, and has the advantages of light weight and large bearing capacity, and the support stability is ensured.
Further, the support tube 24 includes an inclined portion 241 combined and fixed with the support frame 22 and a straight portion 242 combined and fixed with the support 23; the joint of the straight part 242 and the inclined part 241 is provided with a reinforcing structure, and the supporting tube is ensured to have the maximum bearing capacity by adding a corner reinforcing structure at the corner.
In a specific embodiment, the measuring apparatus further includes a testing device connected to the receiving antenna 21 through a cable, and the testing device may be a spectrometer or any other instrument capable of studying a spectrum structure of an electrical signal, which is not limited herein.
In order to limit the position of the receiving platform 20 and prevent the receiving platform 20 from hard collision, a buffer structure, which is a rubber buffer, is configured at the end of the guide rail 30 to cooperate with the receiving platform 20.
The invention also provides an equivalent omnidirectional radiation power measuring method based on the equivalent omnidirectional radiation power measuring device, which comprises the steps of obtaining the distance between the equipment to be measured 11 and the receiving antenna 21 according to the position of the equipment to be measured 11 and the position of the receiving antenna 21; the device to be tested 11 outputs a signal, and the receiving antenna 21 receives the signal output by the device to be tested 11; analyzing the signal received by the receiving antenna 21 by using the test equipment to obtain analysis data of the test equipment; adjusting the distance between the receiving antenna 21 and the device 11 to be tested, thereby acquiring different distance data and analysis data of the testing device at different distances; obtaining a group of equivalent omnidirectional radiation power measurement results according to different distance data and analysis data of the test equipment at different distances; specifically, the analysis is performed by combining the theory and the test result, the signal output by the device under test 11 enters the receiving antenna 21 through spatial attenuation, and the received signal is connected to the frequency spectrograph through a cable.
According to relevant theoretical documents, a calculation formula of Equivalent Isotropic Radiated Power (EIRP) is obtained:
EIRP＝Pm+Loss+20lgR+AF-25.85 (1)
wherein Pm is the reading measured by the spectrometer and is in dBm;
loss is the cable attenuation between the receiving antenna and the spectrometer in dB;
r is the distance between the receiving antenna and the equipment to be tested, and the unit is m;
AF is the antenna coefficient of the receiving antenna, in dB (1/m).
The equivalent omnidirectional radiation power of the specific device to be tested can be obtained by combining the formula with the test result of the frequency spectrograph. The distance change of a receiving platform 20 where a receiving antenna 21 is located is realized by using a driving motor to realize extrapolation, so that a group of equivalent omnidirectional radiation power measurement results under different distances are obtained; and specifically, coupling interference in the group of equivalent omnidirectional radiation power measurement results is removed by utilizing a polynomial fitting mode so as to obtain an accurate equivalent omnidirectional radiation power result.
The invention can effectively reduce the test error caused by the environmental influence by introducing the extrapolation measurement method based on the integral test, thereby improving the test result.
In summary, the distance between the receiving antenna and the device to be measured is adjusted by matching the fixed platform and the receiving platform and moving the position of the receiving platform relative to the fixed platform, and the extrapolation method for adjusting the distance is added on the basis of the integral equivalent omnidirectional radiation power test method to avoid the influence of the measurement environment on the measurement result, so that the measurement result is accurate and reliable.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. An equivalent omni-directional radiation power measuring device, comprising:
the fixing platform is used for fixing the equipment to be tested; and
a receiving platform for fixing a receiving antenna;
the receiving platform is configured to be movable relative to the fixed platform along a first direction to adjust a distance between the receiving antenna and the device under test.
2. The equivalent omni-directional radiation power measuring device according to claim 1, wherein the measuring device comprises a guide rail disposed in a first direction; the receiving platform is configured on the guide rail through a sliding block.
3. The equivalent omni-directional radiation power measuring device according to claim 2, further comprising a driving motor for driving the receiving platform to move on the guide rail in a first direction.
4. The apparatus of claim 1, wherein the receiving platform comprises a supporting frame and a supporting member fixed with the supporting frame for supporting the receiving antenna; the support is configured to make height and attitude adjustments to the receiving antenna.
5. The equivalent omni-directional radiation power measurement device according to claim 1, wherein the receiving platform further comprises a support tube to support a support; the supporting pipe is an aluminum alloy pipe; the surface of the supporting tube is covered with an electromagnetic wave absorbing material.
6. The equivalent omniradiant power measuring device according to claim 5, wherein said supporting tube comprises an inclined portion fixed in combination with a supporting frame and a straight portion fixed in combination with a supporting member;
and a reinforcing structure is arranged at the joint of the straight part and the inclined part.
7. The equivalent omni-directional radiation power measurement device according to claim 1, further comprising a test apparatus connected with the receiving antenna through a cable.
8. The equivalent omnidirectionally radiated power measuring device according to claim 2, wherein the ends of said rails are configured with a buffer structure for cooperating with a receiving platform.
9. A method for measuring equivalent omniradiation power measuring device according to any one of claims 1-8, comprising
Obtaining the distance between the equipment to be tested and the receiving antenna according to the position of the equipment to be tested and the position of the receiving antenna;
the device to be tested outputs signals, and the receiving antenna receives the signals output by the device to be tested;
analyzing the signals received by the receiving antenna by using the test equipment to obtain analysis data of the test equipment;
adjusting the distance between the receiving antenna and the equipment to be tested so as to obtain different distance data and analysis data of the testing equipment at different distances;
obtaining a group of equivalent omnidirectional radiation power measurement results according to different distance data and analysis data of the test equipment at different distances;
and analyzing a group of equivalent omnidirectional radiation power measurement results to obtain a determined equivalent omnidirectional radiation power result.
10. The method of claim 9, wherein analyzing the set of equivalent trx measurements to obtain a determined equivalent trx result further comprises removing coupling interference from the set of equivalent trx measurements by polynomial fitting to obtain an accurate equivalent trx result.
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