CN103746175B - Plate carries the 2450MHz radio-frequency module of PCB antenna - Google Patents
Plate carries the 2450MHz radio-frequency module of PCB antenna Download PDFInfo
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- CN103746175B CN103746175B CN201310745322.4A CN201310745322A CN103746175B CN 103746175 B CN103746175 B CN 103746175B CN 201310745322 A CN201310745322 A CN 201310745322A CN 103746175 B CN103746175 B CN 103746175B
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Abstract
The present invention relates to a kind of PCB circuit board, relate in particular to a kind of plate and carry the 2450MHz radio-frequency module of PCB antenna. Plate of the present invention carries the 2450MHz radio-frequency module of PCB antenna, comprise PCB substrate, PCB substrate is provided with RF receiving and transmission module, balanced-unbalanced circuit, antenna, antenna gain module, RF receiving and transmission module is connected with antenna gain module by balanced-unbalanced circuit, and antenna gain module connects antenna. Pcb board of the present invention carries the radio frequency antenna module of 2450MHz, changes number of unit, realizes different gains, and this antenna has the features such as efficiency is high, stable and reliable for performance, cost is low.
Description
Technical field
The present invention relates to a kind of PCB circuit board, relate in particular to a kind of plate and carry the 2450MHz radio frequency of PCB antennaModule.
Background technology
PCB(PrintedCircuitBoard, printed circuit board (PCB)) effect generally comprises: 1. provide integratedThe mechanical support that the various electronic devices and components such as circuit are fixed, assembled; 2. realize the various electronics such as integrated circuit unitWiring between device and electrical connection (signal transmission) or electric insulation. Desired electrical characteristic is provided,As characteristic impedance etc.
Antenna is a kind of transducer. When transmitting, it is converted into space electromagnetic wave the high frequency electric of emitter;When reception, it is converted to high frequency electric the electromagnetic wave of intercepting and capturing from space again and sends into receiver. For design oneIndividual small-power, the short-distance wireless transceiver that is applied to wireless sense network or active RFID type, antenna is establishedMeter is pith wherein. Good antenna system can make communication distance reach optimum state. AntennaKind is a lot, and in the radio system lower than 3GHz frequency, conventional antenna system comprises spring antenna, rodShape antenna, directional aerial, yagi aerial and PCB antenna etc. Adopt now PCB printed panel (printed circuitPlate) as in radiative unit structure, it adopts solid plane oscillator arms, has following problem: gain is partiallyLow, bandwidth is partially narrow, section is higher, third order intermodulation index is undesirable, these problems cause logical in service areaNews quality can not get ensureing.
The leading indicator of weighing antenna performance is antenna directivity parameter and antenna gain parameter, wherein: directionProperty parameter represents that different antennas has different directional diagrams, for representing the degree of their concentrated radiations, and directional diagramSharp-pointed degree, our incoming direction parameter. Desirable point source aerial radiation does not have directionality, in each sideUpwards radiation intensity equates, direction is a spheroid. We using desirable some source antenna as standard with actual dayLine compares, and results from the electric-field intensity square E2 of certain point and desirable at identical radiant power antennaThe ratio of square E02 of the electric-field intensity that some source antenna produces in same point is called the directionality parameter of this pointD=E2/E02。
Antenna gain: gain and directivity factor are both the parameter that characterizes radiant power intensity, but bothBe not quite similar again. Gain is discussed under same power output condition, and directivity factor is sameUnder radiant power condition, discussed. Because the radiation intensity of antenna all directions is also unequal, the side of antennaChange along with the difference of point of observation to property coefficient and gain, but its variation tendency is consistent. Usually,In actual applications, get the directivity factor of greatest irradiation direction and gain as the directivity factor of antenna andGain.
In small-power, short-range wireless sense network system or active RFID system, because the volume of productLittle, need the Antenna Design that an individual system is little, cheap, communication distance is far away as far as possible, PCB antenna is upperState that in antenna system, volume is little, cost of manufacture is low, but communication distance is generally less than other antenna.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, provides a kind of plate to carry the 2450MHz of PCB antennaRadio-frequency module, it effectively increases antenna gain, improves radio-frequency module at wireless sense network and active RFID systemIn communication distance.
For achieving the above object, the present invention adopts following technical scheme: it comprises PCB substrate, on PCB substrateBe provided with RF receiving and transmission module, balanced-unbalanced circuit, antenna, antenna gain module, RF receiving and transmission module is logicalOverbalance-unbalanced circuit is connected with antenna gain module, and antenna gain module connects antenna.
Balanced-unbalanced circuit (being again Ba Lun Balun, is the English transliteration of balanced-to-unblanced transformer),Principle is by antenna theory, and dipole antenna belongs to balanced type antenna, and coaxial cable belongs to uneven transmission now, ifIt is directly connected, the crust of coaxial cable just have high frequency electric flow through (by coaxial cable transmission principle,High frequency electric should be in cable internal flow, and crust is screen layer, is there is no electric current), so, justCan affect antenna radiation (screen layer that can be imagined as cable has also participated in the radiation of electric wave) therefore,Will between antenna and cable, add balun, the electric current that flows into cable shield outsideControl to fall, that is to say the high frequency electric that flows through cable shield crust from oscillator is blocked.
Preferably, antenna gain module is crescent sheet metal, and crescent sheet metal copper content is greater than 90%.
The computational methods of wavelength: frequency=velocity of wave/wavelength, velocity of wave is the light velocity: 300000000m/s, frequency is2450MHz, wavelength equals 0.1224 meter.
The outer arc radius of crescent sheet metal is 0.191cm, and the angle between outer arc two-end-point is 11.7 °,The inner arc radius of crescent sheet metal is 0.489cm, and the maximum ga(u)ge between outer arc and inner arc is 0.02cm.
The radius extended line at process crescent sheet metal outer arc center and process crescent sheet metal inner arc centerAngle between radius extended line is 5.9 °.
The extrados of crescent sheet metal protrudes from PCB base plan and perpendicular to PCB base plan; Crescent moonThe inner arc of shape sheet metal is attached in PCB base plan. The bottom surface of crescent sheet metal is laid on PCB substrate,Between another side inner arc and outer arc, protrude from PCB substrate and rounding off.
Described RF receiving and transmission module adopts TICC2500 model.
Pcb board of the present invention carries the radio frequency antenna module of 2450MHz, changes number of unit, realizes differentGain, this antenna has the features such as efficiency is high, stable and reliable for performance, cost is low. By increasing a low one-tenthThis assembly, effectively increases antenna gain, improves radio-frequency module in wireless sense network and active RFID systemCommunication distance. Effectively improve the property symmetrically of the far field direction of PCB antenna, and possess by being certainly coupledThe parameter adjustment of district's loading cabling obtains the adjustment capability to antenna frequencies, size, gain, direction, therebyBe suitable for better the portable terminal layout requirement changeable to built-in antenna complex.
Brief description of the drawings
Fig. 1 is modular structure schematic diagram of the present invention;
Fig. 2 is gain module structural representation of the present invention.
In figure: 1-crescent sheet metal; 2-inner arc; 3-outer arc.
Detailed description of the invention
As shown in Figure 1, the radio frequency antenna module that pcb board of the present invention carries 2450MHz comprises PCB substrate,PCB substrate is provided with RF receiving and transmission module, balanced-unbalanced circuit, antenna, antenna gain module, radio frequencyTransceiver module is connected with antenna gain module by balanced-unbalanced circuit, and antenna gain module connects antenna.
As shown in Figure 2, antenna gain module is crescent sheet metal 1, and its copper content is greater than 90%.
The outer arc radius of crescent sheet metal 1 is 0.191cm, and the angle between outer arc two-end-point is 11.7 °,The inner arc radius of crescent sheet metal is 0.489cm, and the maximum ga(u)ge between outer arc and inner arc is 0.02cm.
Through the radius extended line and process crescent sheet metal inner arc center at crescent sheet metal 1 outer arc centerRadius extended line between angle be 5.9 °.
The extrados of crescent sheet metal 1 protrudes from PCB base plan and perpendicular to PCB base plan; MonthThe inner arc of thread form sheet metal 1 is attached in PCB base plan. The bottom surface of crescent sheet metal 1 is laid in PCBOn substrate, between another side inner arc 2 and outer arc 3, protrude from PCB substrate and rounding off.
Described RF receiving and transmission module adopts TICC2500 model.
Embodiment 1
Set in system at storage active RFID, each warehouse is generally divided into goods laydown area and passageway, passagewayIn can allow fork truck current, the radio-frequency module of installing on fork truck can with radio frequency mould of carry on every goodsPiece communication, the function that realizes quick counting and look for goods; Not implementing before the present invention, on the fork truck in passagewayRadio-frequency module can only be communicated by letter by the radio-frequency module on goods with carry within 20m, adopts technology of the present inventionAfter scheme, because antenna gain increases, effectively increase communication distance, the radio-frequency module of installing on fork truckCan communicate with interior module with 30m, make this system can adapt to larger and higher warehouse.
Embodiment 2
In the RFID recognition system of campus student location, student wears the school badge that comprises radio-frequency module, in schoolFixing radio-frequency module is installed in scope, by the communication between 2 modules, can be determined that student's is of living inPosition, not implementing before the present invention, at the every 50m of corridor, a radio-frequency module need to be installed, implementAfter technical scheme of the present invention, the antenna gain of the school badge that comprises radio-frequency module of wearing due to student increases,Can communicate with farther stuck-module, thus in corridor, only need 75m to increase a radio-frequency module of installation,Effectively reduce cost.
Claims (3)
1. plate carries a 2450MHz radio-frequency module for PCB antenna, comprises PCB substrate, it is characterized in that,PCB substrate is provided with RF receiving and transmission module, balanced-unbalanced circuit, antenna, antenna gain module, radio frequencyTransceiver module is connected with antenna gain module by balanced-unbalanced circuit, and antenna gain module connects antenna;Antenna gain module is crescent sheet metal (1), and the outer arc radius of crescent sheet metal (1) is 0.191cm,Angle between outer arc two-end-point is 11.7 °, and the inner arc radius of crescent sheet metal is 0.489cm, outer arc withMaximum ga(u)ge between inner arc is 0.02cm, through radius extended line and the warp at crescent sheet metal outer arc centerThe angle of crossing between the radius extended line at crescent sheet metal inner arc center is 5.9 °, crescent sheet metal (1)Extrados protrude from PCB base plan and perpendicular to PCB base plan; Crescent sheet metal (1)Inner arc is attached in PCB base plan, and the bottom surface of crescent sheet metal (1) is laid on PCB substrate, anotherBetween an inner arc (2) and outer arc (3), protrude from PCB substrate and rounding off.
2. plate according to claim 1 carries the 2450MHz radio-frequency module of PCB antenna, and its feature existsIn, crescent sheet metal (1) copper content is greater than 90%.
3. plate according to claim 1 carries the 2450MHz radio-frequency module of PCB antenna, and its feature existsIn, RF receiving and transmission module adopts TICC2500 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745322.4A CN103746175B (en) | 2013-12-27 | 2013-12-27 | Plate carries the 2450MHz radio-frequency module of PCB antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745322.4A CN103746175B (en) | 2013-12-27 | 2013-12-27 | Plate carries the 2450MHz radio-frequency module of PCB antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103746175A CN103746175A (en) | 2014-04-23 |
| CN103746175B true CN103746175B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310745322.4A Expired - Fee Related CN103746175B (en) | 2013-12-27 | 2013-12-27 | Plate carries the 2450MHz radio-frequency module of PCB antenna |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369120A (en) * | 1999-02-10 | 2002-09-11 | 奥根公司 | Antenna device and radio communication device including antenna device |
| CN201163660Y (en) * | 2008-02-22 | 2008-12-10 | 深圳市远望谷信息技术股份有限公司 | Integration antenna |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19857191A1 (en) * | 1998-12-11 | 2000-07-06 | Bosch Gmbh Robert | Half loop antenna |
| US6982609B1 (en) * | 2002-05-15 | 2006-01-03 | Zeevo | System method and apparatus for a three-line balun with power amplifier bias |
| WO2012072969A1 (en) * | 2010-11-29 | 2012-06-07 | The University Of Birmingham | Balanced antenna system |
-
2013
- 2013-12-27 CN CN201310745322.4A patent/CN103746175B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369120A (en) * | 1999-02-10 | 2002-09-11 | 奥根公司 | Antenna device and radio communication device including antenna device |
| CN201163660Y (en) * | 2008-02-22 | 2008-12-10 | 深圳市远望谷信息技术股份有限公司 | Integration antenna |
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| Publication number | Publication date |
|---|---|
| CN103746175A (en) | 2014-04-23 |
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Effective date of registration: 20180809 Address after: 312030 310 floor, 3 floor, complex building, 586 chubei Chuang complex, Keqiao Economic Development Zone, Shaoxing, Zhejiang. Patentee after: ZKS (SHAOXING) IOT IT CO.,LTD. Address before: 266071 software industrial base, 288 Ningxia Road, Shinan District, Qingdao, Shandong. Patentee before: Qingdao Zhongke Software Co.,Ltd. |
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Granted publication date: 20160608 Termination date: 20211227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |