CN116973640A - Method for detecting antenna lacking element and test fixture - Google Patents
Method for detecting antenna lacking element and test fixture Download PDFInfo
- Publication number
- CN116973640A CN116973640A CN202310957211.3A CN202310957211A CN116973640A CN 116973640 A CN116973640 A CN 116973640A CN 202310957211 A CN202310957211 A CN 202310957211A CN 116973640 A CN116973640 A CN 116973640A
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- antenna
- starvation
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- test
- reflection loss
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 29
- 235000003642 hunger Nutrition 0.000 claims abstract description 103
- 230000037351 starvation Effects 0.000 claims abstract description 68
- 238000003012 network analysis Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 230000005404 monopole Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 10
- 230000002950 deficient Effects 0.000 description 7
- 238000003466 welding Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Abstract
The invention discloses a detection method and a test fixture for an antenna starvation element. The detection method comprises the following steps: connecting a network analysis device with the antenna starvation inlet joint, and connecting a test antenna with the connection structure; the network analysis device providing a signal source to the antenna starvation joint and detecting reflection losses via the antenna starvation element and the test antenna; and if the reflection loss exceeds a preset range, judging that the antenna lacking element is damaged. The embodiment of the invention solves the problem that whether the lacking element of the antenna is damaged or not can not be completely detected in the prior art, improves the production efficiency of products and reduces the manufacturing cost.
Description
Technical Field
The present invention relates to the field of antenna technologies, and in particular, to a method and a test fixture for detecting an antenna starved element.
Background
With the development of antenna technology and the advancement of wearable device technology, the prior art generally provides multiple types of antennas, such as Wi-Fi antennas, LTE antennas, UWB antennas, etc., in a wearable device. Specifically, an antenna circuit board and a flexible board antenna starving element are provided in the wearing device. The antenna in the wearable device can use its housing as a radiator of the antenna. An antenna starvation entry point (antenna feed point) is provided on the antenna circuit board and a flexible printed antenna starvation element is connected to the antenna starvation entry point of the circuit board and to the antenna radiator (i.e., the housing). Therefore, the lacking element of the flexible board antenna is an important element in the antenna, and when the lacking element of the flexible board antenna is damaged, such as due to the problem of external force fracture or welding, the antenna cannot radiate normally, thereby affecting the production efficiency and the manufacturing cost of the product.
However, since the transmission line on the starved element of the flexible printed circuit antenna is a high frequency signal, the ammeter cannot measure the high frequency response of the starved element of the flexible printed circuit antenna, so that the prior art cannot completely detect whether the starved element of the flexible printed circuit antenna is damaged.
Disclosure of Invention
The invention provides a detection method and a test jig for an antenna-deficient element, which are used for solving the problem that whether the antenna-deficient element is damaged or not cannot be completely detected, improving the production efficiency of products and reducing the manufacturing cost.
According to an aspect of the present invention, there is provided a method of detecting an antenna starvation element including an antenna starvation joint for connecting an antenna starvation point of a main circuit and a connection structure for connecting an antenna radiator; the detection method comprises the following steps:
connecting a network analysis device with the antenna starvation inlet joint, and connecting a test antenna with the connection structure;
the network analysis device providing a signal source to the antenna starvation joint and detecting reflection losses via the antenna starvation element and the test antenna;
and if the reflection loss exceeds a preset range, judging that the antenna lacking element is damaged.
Optionally, before the connecting the network analysis device with the antenna starvation joint, the method further comprises:
and fixing the antenna starving element on a platform to be tested, so that the ground of the antenna starving element is connected with the copper sheet.
Optionally, the method for judging whether the reflection loss exceeds a preset range includes:
obtaining sample reflection loss; the sample reflection loss is detected by adopting the undamaged antenna lacking element;
and if the difference value between the reflection loss and the sample reflection loss exceeds a set value, judging that the antenna starving element is damaged.
Optionally, the antenna starvation element is applied to a wearable device.
Optionally, the antenna lacking element is a flexible board antenna lacking element, and the connection structure is a spring sheet; the elastic sheet is used for being connected with the shell of the wearing device.
Optionally, the signal source provides Wi-Fi 2.4GHz signals;
the test antenna adopts a monopole antenna, and the length range of the test antenna is 28mm-35mm.
Optionally, the frequency range of the signal source is 1000 MHz-4500 MHz.
According to another aspect of the present invention, there is provided a test fixture for an antenna starving element, for implementing a method for detecting an antenna starving element according to any embodiment of the present invention; the test fixture includes:
the first connection module comprises a signal source input end and a signal source output connection terminal; the signal source input end is used for being connected with a network analysis device, and the signal source output connection terminal is used for being connected with an antenna starvation joint of the antenna starvation element;
the second connection module comprises a test antenna and an antenna connection terminal, wherein the antenna connection terminal is positioned at one end of the test antenna and is used for being connected with a connection structure of the antenna lacking element.
Optionally, the signal source output connection terminal is a thimble, and the antenna connection terminal is a thimble.
Optionally, the signal source input end is connected with the signal source output connection terminal through a coaxial line.
The embodiment of the invention judges whether the antenna lacking element is damaged or not by adopting a mode of measuring the reflection loss of the antenna by the test antenna. Specifically, the network analysis device is connected with the antenna lack inlet connector, and the test antenna is connected with the connection structure; the network analysis device provides a signal source to the antenna starvation joint and detects reflection losses via the antenna starvation element and the test antenna; if the reflection loss exceeds the preset range, judging that the antenna is damaged due to the lack of the element. The device is arranged in such a way, the principle of antenna reflection is utilized to measure the high-frequency signal of the antenna, the problem that whether the lacking element of the antenna is damaged or not cannot be completely detected in the prior art is solved, the production efficiency of products is improved, and the manufacturing cost is reduced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an antenna starving element according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting an antenna starving element according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of wiring of an antenna starving element in a detection process according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of reflection of an antenna according to an embodiment of the present invention;
FIG. 5 is a waveform diagram of a reflection loss according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a test fixture for an antenna starving element according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention provides a method for detecting an antenna starvation element. In order to clearly explain the detection method, first, the structure of the detection element provided in the embodiment of the present invention will be described. Fig. 1 is a schematic structural diagram of an antenna starving element according to an embodiment of the present invention. Referring to fig. 1, the antenna starving element 1 includes an antenna impedance matching circuit (antenna impedance) 11, and the antenna impedance matching circuit 11 is used to improve the antenna transmission/reception efficiency. The antenna starvation element 1 further comprises an antenna starvation joint 12 and a connection structure 13, the antenna starvation joint 12 being arranged for connecting an antenna starvation point of the main circuit, and the connection structure 13 being arranged for connecting an antenna radiator. For example, the antenna starvation element 1 is used in a wearing device, and the main circuit is a circuit board in the wearing device, on which an antenna starvation point (antenna feed point) is designed, and the antenna starvation connector 12 is used for connecting with the antenna starvation point. The antenna radiator is the housing of the wearing device, to which the connection structure 13 is intended to be connected. Thus, the antenna starvation element 1 acts as a connection element between the circuit board and the housing. When the antenna is damaged by the lacking element 1, such as by external force fracture or welding, the antenna cannot radiate normally, thereby affecting the production efficiency and manufacturing cost of the product.
Therefore, the embodiment of the invention provides a method for detecting the antenna lacking element, so as to detect the antenna lacking element, improve the production efficiency of products and reduce the manufacturing cost. Fig. 2 is a flowchart of a method for detecting an antenna starving element according to an embodiment of the present invention. Referring to fig. 2, the detection method includes the steps of:
and S110, connecting the network analysis device with the antenna lacking connector, and connecting the test antenna with the connection structure.
Fig. 3 is a schematic diagram illustrating a wiring of an antenna starving element in a detection process according to an embodiment of the present invention. Referring to fig. 3, the network analysis device 2 is connected to the antenna starvation joint 12, and the test antenna 3 is connected to the connection structure 13. Wherein the network analysis device 2 is capable of providing a signal source required for detection; for example, the signal source provides a Wi-Fi antenna signal source, an LTE antenna signal source, or a UWB antenna signal source, etc. The test antenna 3 is used to generate resonance, for example, the test antenna 3 is a monopole antenna, and the resonance length is about a quarter wavelength in order to meet the boundary conditions of the antenna.
S120, the network analysis device provides a signal source for the antenna starvation joint and detects reflection losses through the antenna starvation element and the test antenna.
Fig. 4 is an exemplary schematic diagram of reflection of an antenna according to an embodiment of the present invention. Referring to fig. 4, the network analysis device 2 is equivalent to a Z source of an antenna, and the test antenna 3 is equivalent to a Z antenna. The forward signal p_forward generated by the network analysis device 2 is reflected on the test antenna 3 to generate a reflected signal p_reflected. The network analyzer 2 can measure the reflected signal P_reflected and the Loss of the reflected signal, i.e. the reflection Loss (Return Loss). Reflection losses are defined as follows: return Loss = -10x log (Source Power/Reflected Power).
S130, judging whether the reflection loss is in a preset range or not; if yes, the antenna starving element is good; otherwise, the antenna starving element is a defective product.
If the antenna-starved device is defective, i.e. the antenna-starved device is damaged, the reflection loss measured by the network analyzer 2 exceeds a predetermined range. Optionally, the method for judging whether the reflection loss exceeds the preset range includes: obtaining sample reflection loss; the sample reflection loss is detected by adopting an undamaged antenna starvation element (namely a standard sample); if the difference between the reflection loss and the sample reflection loss exceeds the set value, the antenna starvation element is judged to be damaged. Specifically, fig. 5 is a waveform diagram of reflection loss according to an embodiment of the present invention. Referring to fig. 5, as shown by curve 100, for an undamaged antenna starved element, the reflection loss thereof fluctuates significantly with the Frequency (Frequency) of the signal source. As shown in curve 200, the reflection loss is approximately 0dB for a damaged antenna starved element, which is almost total reflection at the measured frequency band. Therefore, the reflection loss of the defective product is obviously different from that of the sample, so that whether the antenna starving element is damaged or not is judged.
The embodiment of the invention judges whether the antenna lacking element is damaged or not by adopting a mode of measuring the reflection loss of the antenna by the test antenna. Specifically, the network analysis device is connected with the antenna lack inlet connector, and the test antenna is connected with the connection structure; the network analysis device provides a signal source to the antenna starvation joint and detects reflection losses via the antenna starvation element and the test antenna; if the reflection loss exceeds the preset range, judging that the antenna is damaged due to the lack of the element. The device is arranged in such a way, the principle of antenna reflection is utilized to measure the high-frequency signal of the antenna, the problem that whether the lacking element of the antenna is damaged or not cannot be completely detected in the prior art is solved, the production efficiency of products is improved, and the manufacturing cost is reduced.
With continued reference to fig. 3, in addition to the above embodiments, optionally, before connecting the network analysis device 2 to the antenna starvation connector 12, the method further includes: the antenna starving element 1 is fixed to the table to be tested, and the ground of the antenna starving element 1 is connected with the copper sheet 4. The copper sheet 4 simulates the ground of the test antenna 3.
Based on the above embodiments, optionally, the antenna starvation element is applied to the wearable device. The wearing device may be, for example, a wristwatch, a bracelet, or the like. In which for a wearable device, such as a wristwatch, the antenna would utilize the upper case of the wristwatch or the case of the wristwatch or both, the radiator of the antenna. And an antenna starvation point is designed on the circuit board of the watch, and the antenna starvation point and the antenna radiator on the circuit board are connected through the antenna starvation element. Therefore, when the antenna is damaged by the lacking element, such as external force fracture, damage to the elastic sheet on the antenna lacking element, damage to the antenna lacking joint or lack of welding, the antenna cannot radiate normally, thereby affecting the production efficiency of the product and increasing the reworking cost. The embodiment of the invention can detect the antenna after the welding of the elements is finished, so that defective products can be found in time, and the reworking of products can be avoided, thereby improving the production efficiency and reducing the cost.
On the basis of the above embodiments, optionally, the antenna starving element is a flexible board antenna starving element, and the connection structure is a spring plate; the elastic sheet is used for being connected with the shell of the wearing device. The flexible board antenna lacking element has certain flexibility, is beneficial to being applied to the wearing device, and saves the space of the wearing device.
Based on the above embodiments, the frequency range of the signal source is optionally 1000MHz to 4500MHz. Wherein the measurement is connected to both ends of the antenna starving element, the antenna starving element 1 is small in size, e.g. about 5mm in length, due to the fact that the antenna starving element is arranged in the wearing device. Therefore, the frequency range of the signal source is set to be 1000 MHz-4500 MHz, so that the resonance frequency of the antenna starving element is not in the measuring frequency range.
Based on the above embodiments, optionally, the signal source provides Wi-Fi 2.4GHz signals; the test antenna adopts a monopole antenna, and the length range of the test antenna is 28mm-35mm. Therefore, the embodiment of the invention can realize the detection of the antenna lacking element by adopting the signal source in one form, and does not need to detect the signal sources in various forms, thereby simplifying the detection flow and improving the detection efficiency.
The embodiment of the invention also provides a test fixture for the antenna starvation element. The test fixture is used for realizing the method for detecting the antenna starvation element provided by the embodiments. Fig. 6 is a schematic structural diagram of a test fixture for an antenna starving element according to an embodiment of the present invention. Referring to fig. 6, the test fixture includes:
a first connection module including a signal source input terminal 21 and a signal source output connection terminal 22; the signal source input end 21 is used for connecting with a network analysis device, and the signal source output connection terminal 22 is used for connecting with an antenna lack inlet connector of the antenna lack inlet element; optionally, the signal source output connection terminal 22 is a thimble, preferably an elastic thimble; alternatively, the signal source input terminal 21 is connected to the signal source output connection terminal 22 through the coaxial line 23;
the second connection module comprises a test antenna 3 and an antenna connection terminal 31, wherein the antenna connection terminal 31 is positioned at one end of the test antenna 3, and the antenna connection terminal 31 is used for connecting a connection structure of an antenna lacking element; optionally, the antenna connection terminal 31 is a thimble, preferably a thimble with elasticity; alternatively, the test antenna 3 is a monopole antenna, composed of copper pillars.
Illustratively, the method for testing the antenna starvation element by using the test fixture comprises the following steps: the signal source input 21 is connected to the network analysis device. The antenna starving element is fixed on a to-be-tested platform, the to-be-tested platform is provided with a copper sheet, the grounding end of the antenna starving element is contacted with the copper sheet, and the copper sheet simulates the ground of the monopole antenna. The test fixture is depressed and the antenna connection terminal 31 (thimble) is in contact with the spring of the antenna starvation element, while the signal source output connection terminal 22 (thimble) is connected to the antenna starvation connector of the antenna starvation element. The network analysis device measures reflection loss and emits a 2.4GHz signal.
When the antenna starving element is damaged, the reflection loss is almost close to 0dB. Whereas the reflection loss measured for the standard sample is the frequency response of the monopole antenna, the reflection loss is small around the 2.4GHz resonance frequency. Comparing the measured values of the standard samples, if the difference is > +/-1dB, judging that the antenna is lack of the element damage. Therefore, the embodiment of the invention can accurately judge whether the antenna starving element is damaged or not by measuring the reflection loss of the flexible printed antenna starving element of the watch and comparing the measurement curve of the standard sample. Therefore, the embodiment of the invention can reduce the situation that the whole machine is formed at the rear end because the damage of the antenna lacking element is not detected, thereby reducing the output proportion of defective products, further improving the production efficiency and reducing the production cost.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of detecting an antenna starvation element, wherein the antenna starvation element comprises an antenna starvation joint for connecting to an antenna starvation point of a main circuit and a connection structure for connecting to an antenna radiator; the detection method comprises the following steps:
connecting a network analysis device with the antenna starvation inlet joint, and connecting a test antenna with the connection structure;
the network analysis device providing a signal source to the antenna starvation joint and detecting reflection losses via the antenna starvation element and the test antenna;
and if the reflection loss exceeds a preset range, judging that the antenna lacking element is damaged.
2. The method of antenna starvation detection element according to claim 1, characterized in that before said connecting network analysis means with said antenna starvation joint, further comprises:
and fixing the antenna starving element on a platform to be tested, so that the ground of the antenna starving element is connected with the copper sheet.
3. The antenna starvation detection method according to claim 1, characterized in that the method of judging whether the reflection loss exceeds a preset range comprises:
obtaining sample reflection loss; the sample reflection loss is detected by adopting the undamaged antenna lacking element;
and if the difference value between the reflection loss and the sample reflection loss exceeds a set value, judging that the antenna starving element is damaged.
4. The method of claim 1, wherein the antenna starvation element is applied to a wearable device.
5. The method for detecting an antenna starvation element according to claim 4, wherein the antenna starvation element is a flexible board antenna starvation element, and the connection structure is a spring plate; the elastic sheet is used for being connected with the shell of the wearing device.
6. The method of antenna starvation detection element according to claim 4, characterized in that the signal source provides Wi-Fi 2.4GHz signals;
the test antenna adopts a monopole antenna, and the length range of the test antenna is 28mm-35mm.
7. The method for detecting an antenna starving element according to claim 6, wherein a frequency band of the signal source ranges from 1000MHz to 4500MHz.
8. A test fixture for an antenna starvation element, characterized by implementing a method for detecting an antenna starvation element according to any of the claims 1-7; the test fixture includes:
the first connection module comprises a signal source input end and a signal source output connection terminal; the signal source input end is used for being connected with a network analysis device, and the signal source output connection terminal is used for being connected with an antenna starvation joint of the antenna starvation element;
the second connection module comprises a test antenna and an antenna connection terminal, wherein the antenna connection terminal is positioned at one end of the test antenna and is used for being connected with a connection structure of the antenna lacking element.
9. The antenna starvation element test fixture according to claim 8, wherein the signal source output connection terminal is a pin and the antenna connection terminal is a pin.
10. The antenna starvation element test fixture according to claim 8, wherein the signal source input is connected to the signal source output connection terminal through a coaxial line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310957211.3A CN116973640A (en) | 2023-07-31 | 2023-07-31 | Method for detecting antenna lacking element and test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310957211.3A CN116973640A (en) | 2023-07-31 | 2023-07-31 | Method for detecting antenna lacking element and test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116973640A true CN116973640A (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310957211.3A Pending CN116973640A (en) | 2023-07-31 | 2023-07-31 | Method for detecting antenna lacking element and test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116973640A (en) |
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2023
- 2023-07-31 CN CN202310957211.3A patent/CN116973640A/en active Pending
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