CN1960504A - Radio test interface in mobile communication terminal - Google Patents
Radio test interface in mobile communication terminal Download PDFInfo
- Publication number
- CN1960504A CN1960504A CNA2006100963071A CN200610096307A CN1960504A CN 1960504 A CN1960504 A CN 1960504A CN A2006100963071 A CNA2006100963071 A CN A2006100963071A CN 200610096307 A CN200610096307 A CN 200610096307A CN 1960504 A CN1960504 A CN 1960504A
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- microstrip line
- line interface
- interface
- via hole
- mobile communication
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- Monitoring And Testing Of Transmission In General (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
The invention is used for testing, calibrating and debugging the RF performance of mobile terminal. The testing interface is located on a PCB and comprises a first microstrip line interface, a microstrip line, a second microstrip line interface, a center through-hole, a coaxial cable, and one or more grounded through-holes on PCB. Wherein, the first microstrip line interface is connected to the second microstrip line through a second microstrip line; the coaxial cable is connected to the microstrip line through the center through-hole, and passes through the through-hole and is distributed on the area closed to the second coaxial line interface; the first microstrip line interface is connected to the external mobile communication transceiver; the second microstrip line interface is connected to the external antenna; the coaxial cable interface is connected to the external testing apparatus.
Description
Technical field
The present invention relates to the test of mobile communication terminal in the moving communicating field, be specifically related to a kind of interface that is used for radio-frequency performance test, calibration and debugging.
Background technology
Whether any product all needs to test, adhere to specification to check its performance.Can both reach the requirement of design objective for the radio-frequency performance that guarantees every mobile communication terminal, need in process of production every mobile communication terminal is carried out performance test, calibration and adjustment, design and a kind ofly can connect instrument, low cost, the high-performance radio-frequency interface that can connect antenna again is the key that can test be carried out smoothly.
At present, generally the method for Cai Yonging is to use the special-purpose coaxial radio-frequency connector of band radio-frequency (RF) switch, and it is installed on the circuit board of mobile communication terminal (PCB), is connected between mobile communication terminal transceiver and the antenna.During normal the use, this coaxial radio-frequency connector is equivalent to short circuit, and signal transmits between mobile communication terminal transceiver and antenna.When needs carry out performance test, plug coaxial measuring head, original signal transmission channel open circuit, signal transmits between mobile communication terminal transceiver and coaxial measuring head, thereby carries out the performance test and the adjustment of mobile communication terminal.The cost of above-mentioned coaxial radio-frequency connector is a no small expense for producing manufacturing in enormous quantities.In addition, along with portable demand, the miniaturization day by day of mobile communication terminal volume is adopted similar radio frequency connector also can spatially arrange and is run into many difficulties.
Summary of the invention
Technical problem: the object of the invention is to provide the simpler method of a kind of use to realize radio test interface in mobile communication terminal, substitutes the special-purpose coaxial radio-frequency connector that generally uses in the mobile communication terminal, and its cost is low, simple in structure, is easy to miniaturization.
Technical scheme: for realizing above-mentioned target, the present invention adopts following technical scheme: the complete figuration of this test interface is in the printed circuit board (PCB) plate, and it comprises the first microstrip line interface, microstrip line, the second microstrip line interface, center via hole, coaxial line interface, one or more printed circuit board ground via hole on the printed circuit board (PCB); Wherein, the first microstrip line interface links to each other with the second microstrip line interface by microstrip line, and the coaxial line interface links to each other with microstrip line by the center via hole, and the ground connection via hole distributes near the coaxial line interface; The first microstrip line interface links to each other with the mobile communication terminal transceiver of outside, and the second microstrip line interface is connected with the antenna of outside, and the coaxial line interface is connected with the tester of outside.This test interface all is positioned on the printed circuit board (PCB) at the first microstrip line interface, microstrip line, the second microstrip line interface, center via hole on the mechanical structure, the two ends of microstrip line are respectively the first microstrip line interface, the second microstrip line interface, the centre of microstrip line is the center via hole, and the center via hole passes the intermediate layer through hole and links to each other with the inner wire (bottom pad) of coaxial line interface; Be provided with the multilayer dielectricity layer between bottom ground plane and the microstrip line, be provided with the intermediate layer between every two layer medium layer, the bottom pad is positioned at the central authorities of bottom ground plane, and the ground connection via hole is distributed on the parallel with the center via hole of coaxial line interface on every side.
The relative institute of above-mentioned radio frequency interface connection device comprises two microstrip line interfaces and a coaxial line interface, and the microstrip line interface is used for the signal transmission between mobile communication terminal transceiver and the antenna, and the coaxial line interface is used for linking to each other with testing equipment.Transmit signals to antenna by the microstrip line interface when mobile communication terminal normally uses, when performance test, disconnect the antenna that connects and use the coaxial line interface to connect testing equipment.
Beneficial effect: radio test interface in mobile communication terminal disclosed by the invention has that PCB circuit with design combines together, volume is little, reliability is high, make characteristic of simple.This interface can substitute at present generally, and surface mount (SMT) the radio-frequency (RF) switch connector of use can reduce product cost as the radio frequency test interface of various mobile communication terminals in production in enormous quantities.
Description of drawings
The electrical block diagram that Fig. 1 forms for radio frequency test interface.
The mechanical structure schematic diagram that Fig. 2 forms for radio frequency test interface.
Fig. 3 be among Fig. 2 A-A to the sectional structure schematic diagram.
Fig. 4 is insertion loss and the standing-wave ratio schematic diagram between microstrip line interface 2 and the microstrip line interface 4.
Fig. 5 is insertion loss and the standing-wave ratio schematic diagram between microstrip line interface 2 and the coaxial line interface 6.
Have among the above figure: mobile communication terminal transceiver 1, the first microstrip line interface 2, microstrip line 3, the second microstrip line interface 4, antenna 5, coaxial line interface 6, ground connection via hole 7, tester 8, center via hole 9, bottom ground plane 10, bottom pad 11, dielectric layer 20, intermediate layer 21, intermediate layer through hole 22.
Embodiment
The present invention adopts multilayer board (PCB), and it is made up of top layer, bottom and the some intermediate layers that can not directly see.Describe conveniently for the back, we claim that microstrip line place face is a top layer, and the coaxial line interface surface is a bottom.
Microstrip line 3 is designed to 50 ohmages according to the flaggy definition of PCB, so that mate with mobile communication terminal transceiver 1 and antenna 5.
Coaxial line interface 6 also is designed to 50 ohmages, so that mate with testing equipment 8, bottom pad 11 constitutes coaxial inner conductors, and bottom ground plane 10 constitutes coaxial outer conductors.This test interface is on mechanical structure, the first microstrip line interface 2, microstrip line 3, the second microstrip line interface 4, center via hole 9 all are positioned on the printed circuit board (PCB), the two ends of microstrip line 3 are respectively the first microstrip line interface 2, the second microstrip line interface 4, the centre of microstrip line 3 is a center via hole 9, and center via hole 9 passes intermediate layer through hole 22 and links to each other with bottom pad 11; Be provided with multilayer dielectricity layer 20 between bottom ground plane 10 and the microstrip line 3, be provided with intermediate layer 21 between every two layer medium layer 20, bottom pad 11 is positioned at the central authorities of bottom ground plane 10, and ground connection via hole 7 is distributed on the parallel with center via hole 9 of coaxial line interface 6 on every side.The inner wire of coaxial line interface 6 (bottom pad 11) diameter need be considered reliably to contact with the inner wire of standard coaxial measuring head, so the diameter of bottom pad 11 is unsuitable too small, gets 0.5 millimeter to 1.5 millimeters usually.Constituting the bottom pad 11 of coaxial line interface 6 and the spacing of bottom ground plane 10 designs according to 50 ohm of coaxial lines.Intermediate layer through hole 22 also designs according to 50 ohm of coaxial lines with the spacing of center via hole 9.
Via hole 7 is used to the PCB grounded circuit that impedance path is provided, and is the center with coaxial line interface inner wire, being one or more ground connection via holes of radius distribution greater than bottom coaxial line interface outer conductor.If the PCB design provides good high frequency earth-return, these ground connection via holes can not be provided with yet.
Fig. 2～6 are embodiments of the invention, and its canonical parameter is as follows: PCB adopts 4 laminates of FR4 material, and dielectric constant is 4.6, thickness 0.8mm, and the spacing in top layer and bottom and next-door neighbour intermediate layer is 0.29mm.The top layer micro belt line width is 0.48mm, and the bottom pad diameter is 0.8mm, and the spacing of bottom pad and bottom ground plane is 0.52mm, and the center via diameter is 0.3mm, and the intermediate layer through-hole diameter is 1.8mm.The radio frequency test interface area occupied is 3 * 3mm
2, additional loss such as Fig. 4, shown in Figure 5 of inserting between the standing-wave ratio of each port and port.
Claims (2)
1. radio test interface in mobile communication terminal, it is characterized in that the complete figuration of this test interface in the printed circuit board (PCB) plate, it comprises the first microstrip line interface (2), microstrip line (3), the second microstrip line interface (4), center via hole (9), coaxial line interface (6), one or more printed circuit board ground via hole (7) on the printed circuit board (PCB); Wherein, the first microstrip line interface (2) links to each other with the second microstrip line interface (4) by microstrip line (3), and coaxial line interface (6) links to each other with microstrip line (3) by center via hole (9), and ground connection via hole (7) distributes near coaxial line interface (6); The first microstrip line interface (2) links to each other with the mobile communication terminal transceiver (1) of outside, and the second microstrip line interface (4) is connected with the antenna (5) of outside, and coaxial line interface (6) is connected with the tester (8) of outside.
2. radio test interface in mobile communication terminal as claimed in claim 1, it is characterized in that this test interface is on mechanical structure, the first microstrip line interface (2), microstrip line (3), the second microstrip line interface (4), center via hole (9) all are positioned on the printed circuit board (PCB), the two ends of microstrip line (3) are respectively the first microstrip line interface (2), the second microstrip line interface (4), the centre of microstrip line (3) is center via hole (9), and center via hole (9) passes intermediate layer through hole (22) and links to each other with bottom pad (11); Be provided with multilayer dielectricity layer (20) between bottom ground plane (10) and the microstrip line (3), between every two layer medium layer (20), be provided with intermediate layer (21), bottom pad (11) is positioned at the central authorities of bottom ground plane (10), and ground connection via hole (7) is distributed on the parallel with center via hole (9) of coaxial line interface (6) on every side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100963071A CN100518336C (en) | 2006-09-19 | 2006-09-19 | Radio test interface in mobile communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100963071A CN100518336C (en) | 2006-09-19 | 2006-09-19 | Radio test interface in mobile communication terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1960504A true CN1960504A (en) | 2007-05-09 |
| CN100518336C CN100518336C (en) | 2009-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100963071A Expired - Fee Related CN100518336C (en) | 2006-09-19 | 2006-09-19 | Radio test interface in mobile communication terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100518336C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901750A (en) * | 2014-03-07 | 2015-09-09 | 深圳富泰宏精密工业有限公司 | Circuit board and multifunctional radio frequency test bench thereof |
| CN105425061A (en) * | 2015-11-04 | 2016-03-23 | 上海斐讯数据通信技术有限公司 | Radio frequency test method, module and equipment |
| CN107483074A (en) * | 2017-09-19 | 2017-12-15 | 努比亚技术有限公司 | The mobile terminal of radio circuit and the application radio circuit |
| CN112433099A (en) * | 2020-09-28 | 2021-03-02 | 中国电子科技集团公司第二十九研究所 | Method for detecting signals of multi-layer board embedded broadband radio frequency transmission line |
-
2006
- 2006-09-19 CN CNB2006100963071A patent/CN100518336C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901750A (en) * | 2014-03-07 | 2015-09-09 | 深圳富泰宏精密工业有限公司 | Circuit board and multifunctional radio frequency test bench thereof |
| CN104901750B (en) * | 2014-03-07 | 2017-06-27 | 深圳富泰宏精密工业有限公司 | Circuit board and its Multifunctional radio-frequency test bench |
| CN105425061A (en) * | 2015-11-04 | 2016-03-23 | 上海斐讯数据通信技术有限公司 | Radio frequency test method, module and equipment |
| CN107483074A (en) * | 2017-09-19 | 2017-12-15 | 努比亚技术有限公司 | The mobile terminal of radio circuit and the application radio circuit |
| CN112433099A (en) * | 2020-09-28 | 2021-03-02 | 中国电子科技集团公司第二十九研究所 | Method for detecting signals of multi-layer board embedded broadband radio frequency transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100518336C (en) | 2009-07-22 |
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Granted publication date: 20090722 Termination date: 20120919 |