CN201477734U - Micropower wireless remote control transmission circuit - Google Patents
Micropower wireless remote control transmission circuit Download PDFInfo
- Publication number
- CN201477734U CN201477734U CN2009202327421U CN200920232742U CN201477734U CN 201477734 U CN201477734 U CN 201477734U CN 2009202327421 U CN2009202327421 U CN 2009202327421U CN 200920232742 U CN200920232742 U CN 200920232742U CN 201477734 U CN201477734 U CN 201477734U
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- China
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- microstrip antenna
- impedance matching
- circuit
- matching circuit
- remote control
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Abstract
The utility model relates to a micropower wireless remote control transmission circuit, comprising an oscillating source and a microstrip antenna, wherein the input of the oscillating source is connected with control signals; the output of the oscillating source is connected with the microstrip antenna sequentially by a blocking condenser and an impedance matching circuit, one end of the microstrip antenna is connected with the impedance matching circuit and the other end thereof is short-circuit to ground; or the output of the oscillating source is directly connected with the microstrip antenna through the blocking condenser, one end of the microstrip antenna is connected with the blocking condenser and the other end thereof is short-circuit to ground. The micropower wireless remote control transmission circuit has the advantages that the impedance matching circuit is increased between the oscillating source and the microstrip antenna to lead the fundamental frequency to be in impedance matching state, thus realizing effective emission of useful signals of the fundamental frequency; for the clutter and harmonic frequencies in impedance mismatch state, the radiation of the clutter and harmonic frequencies can be effectively inhibited; the impedance matching is convenient to realize on the fundamental frequency by using the microstrip antenna with the tail end being short-circuit and grounded.
Description
Technical field
The utility model relates to a kind of radio transmitter circuit, especially a kind of micropower wireless remote control radiating circuit.
Background technology
Along with the development of radiotelegraphy, radio information propagation has been widely used in all trades and professions, as radio and television, navigation, satellite communication, mobile communication, remote-control romote-sensing, Bluetooth technology etc., so radio frequency resource growing tension.Always strict to the technical requirement of wireless device abroad, exporting European electronic product must authenticate by CE, and the electronic product of the outlet U.S. needs to authenticate by FCC; Domestic wireless device is detected requires progressively standard, and the wireless device of opening frequency range is required to meet EMC testing standard, the technical requirement of micropower (short distance) wireless device 2005 editions.
Micropower (short distance) radio transition equipment on the market is necessary circuit design is researched and developed not meeting the EMC testing standard aspect the harmonic wave clutter at present.
Fig. 2 is classical micropower (short distance) wireless remote control radiating circuit schematic diagram, and wherein L1 is an emitting antenna, and characteristics are that circuit structure is simple, but can not effectively suppress harmonic wave, is exceeding standard aspect the inhibition of harmonic wave clutter, and existing product does not meet the EMC testing standard.Want the examination criteria by EMC, traditional method need add filtering circuit, suppresses the harmonic wave clutter with the method for filtering, and the result can make entire circuit become complicated, must increase on the volume, needs the miniaturization Design intention to disagree to being used for automobile key etc.
Fig. 3 is certain the wireless remote control radiating circuit that is used to export, and is made of control circuit, oscillation source, buffer amplifier, filter network and antenna, satisfies CE and FCC authentication requesting, but the circuit complexity, volume is big, the cost height.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of micropower wireless remote control radiating circuit is provided, and has realized the wireless remote control emission function with succinct circuit-mode, meets the EMC testing standard simultaneously.
The technical scheme that provides according to the utility model, described micropower wireless remote control radiating circuit comprises oscillation source and microstrip antenna, the input connection control signal of oscillation source, the output of described oscillation source is connected with microstrip antenna with impedance matching circuit by capacitance successively, microstrip antenna one end is connected with impedance matching circuit, and the other end is shorted to ground; Perhaps the output of described oscillation source directly is connected with microstrip antenna by capacitance, and microstrip antenna one end is connected with capacitance, and the other end is shorted to ground.
Described impedance matching circuit is the LC impedance matching circuit, and the structure of LC impedance matching circuit is L type, T type or ∏ type.
Described impedance matching circuit comprises: second inductance, one end connects capacitance, and the other end passes through the 6th capacity earth and is connected microstrip antenna.
Described oscillation source comprises: the base stage of Technitron connects control signal by SAW resonator ground connection with by first resistance; The collector of Technitron connects described impedance matching circuit and connects positive source by first inductance, passes through first capacity earth between first inductance and the positive source and passes through second capacity earth; The emitter of Technitron is by second resistance and the 4th capacity earth; Connect the 3rd electric capacity between the emitter and collector of Technitron.
The utility model has the advantages that: increased impedance matching circuit between oscillation source and the microstrip antenna, made fundamental frequency be in the impedance matching state, thereby realized the useful signal of fundamental frequency is effectively launched; Be in the impedance mismatching state for harmonic wave clutter frequency, effectively suppressed the radiation of harmonic wave clutter frequency; Adopt microstrip antenna, the terminal short circuit ground connection of microstrip antenna is convenient to realize impedance matching in fundamental frequency.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Fig. 2 is classical micropower wireless remote control radiating circuit schematic diagram.
Fig. 3 is a kind of circuit theory diagrams of prior art.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1: the utility model comprises control signal, oscillation source, impedance matching circuit, microstrip antenna L, and the input connection control signal of oscillation source connects capacitance C5 and impedance matching circuit between the output of described oscillation source and microstrip antenna L; Microstrip antenna L one end is connected with impedance matching circuit, and the other end is shorted to ground.
Described impedance matching circuit is the LC impedance matching circuit, comprises L type, T type and ∏ type; For example adopt capacitance C5 one end to connect the output of oscillation source, the other end that the other end connects second inductance L, 2, the second inductance L 2 passes through the 6th capacitor C 6 ground connection and is connected microstrip antenna.
Described oscillation source comprises: the base stage of Technitron T1 connects control signal by SAW resonator SAW ground connection with by first resistance R 1; The collector of Technitron T1 connects described impedance matching circuit and meets positive source Vcc by first inductance L 1, goes lotus root by first capacitor C, 1 ground connection with by second capacitor C, 2 ground connection between first inductance L 1 and the positive source Vcc; The emitter of Technitron T1 is by second resistance R 2 and the 4th capacitor C 4 ground connection; Connect the 3rd capacitor C 3 between the emitter and collector of Technitron T1.First capacitor C 1 and second capacitor C 2 be for removing lotus root electric capacity, is respectively applied for low frequency (control signal) and high frequency (carrier wave) goes lotus root.
Oscillation source adopts silicon NPN Technitron, and whether SAW resonator SAW frequency stabilization determines oscillation source to vibrate by control signal and realize the ASK modulation.
Utilize the characteristics of the S parameter of Technitron T1 with frequency change, be that oscillation source output impedance changes with frequency change, between oscillation source output and microstrip antenna L, carry out impedance matching with impedance matching circuit, be in matching status in fundamental frequency, thereby realize the useful signal of fundamental frequency is effectively transmitted.
Beyond the fundamental frequency frequency, impedance matching circuit makes impedance mismatching between oscillation source and the microstrip antenna L, thereby reaches the purpose that suppresses harmonic wave, clutter.
Described microstrip antenna L is ground connection (short circuit) printed wire antenna.Microstrip antenna L one end is connected with impedance matching circuit, an other terminal shortcircuit arrives ground, makes to realize coupling at first-harmonic between microstrip antenna L and the oscillation source, and in other frequency mismatch, thereby reach the purpose that effective transmission first-harmonic suppresses harmonic wave, clutter simultaneously, satisfy EMC and detect requirement.
Under given conditions, oscillation source output links to each other with microstrip antenna L (saving second inductance L 2 and the 6th capacitor C 6) by capacitance C5, and the other terminal shortcircuit of microstrip antenna L is to ground.Promptly under the situation that the circuit board size allows, characteristic impedance and the oscillation source output impedance that can design the microstrip antenna L of an end ground connection are complementary in fundamental frequency, and in other frequency mismatch.Thereby reach the purpose that effective transmission first-harmonic suppresses harmonic wave, clutter simultaneously, satisfy EMC and detect requirement.
The transmitter module that circuit described in the utility model constitutes meets the EMC testing standard, and the technical requirement of micropower (short distance) wireless device 2005 editions simultaneously can be by CE authentication and FCC authentication; Can be used for open frequency range micropower (short distance) wireless remote control, remote measurement.As remote-control car door, garage door, light fixture, doorbell, toy etc.; Remote measurement humiture, meteorologic parameter etc.
Claims (4)
1. micropower wireless remote control radiating circuit, comprise oscillation source and microstrip antenna (L), the input connection control signal of oscillation source, it is characterized in that: the output of described oscillation source is connected with microstrip antenna (L) with impedance matching circuit by capacitance (C5) successively, microstrip antenna (L) end is connected with impedance matching circuit, and the other end is shorted to ground; Perhaps the output of described oscillation source directly is connected with microstrip antenna (L) by capacitance (C5), and microstrip antenna (L) end is connected with capacitance (C5), and the other end is shorted to ground.
2. micropower wireless remote control radiating circuit as claimed in claim 1 is characterized in that described impedance matching circuit is the LC impedance matching circuit, and the structure of LC impedance matching circuit is L type, T type or П type.
3. micropower wireless remote control radiating circuit as claimed in claim 1 is characterized in that described impedance matching circuit comprises: second inductance (L2) end connects capacitance (C5), and the other end passes through the 6th electric capacity (C6) ground connection and is connected microstrip antenna (L).
4. micropower wireless remote control radiating circuit as claimed in claim 1 is characterized in that described oscillation source comprises: the base stage of Technitron (T1) connects control signal by SAW resonator ground connection with by first resistance (R1); The collector of Technitron (T1) connects described impedance matching circuit and connects positive source (Vcc) by first inductance (L1), passes through first electric capacity (C1) ground connection between first inductance (L1) and the positive source (Vcc) and passes through second electric capacity (C2) ground connection; The emitter of Technitron (T1) is by second resistance (R2) and the 4th electric capacity (C4) ground connection; Connect the 3rd electric capacity (C3) between the emitter and collector of Technitron (T1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202327421U CN201477734U (en) | 2009-09-09 | 2009-09-09 | Micropower wireless remote control transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202327421U CN201477734U (en) | 2009-09-09 | 2009-09-09 | Micropower wireless remote control transmission circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477734U true CN201477734U (en) | 2010-05-19 |
Family
ID=42413989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202327421U Expired - Fee Related CN201477734U (en) | 2009-09-09 | 2009-09-09 | Micropower wireless remote control transmission circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477734U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414006A (en) * | 2013-08-13 | 2013-11-27 | 常州智梭传感科技有限公司 | Ultra-thin passive wireless acoustic surface wave sensor |
| CN104392597A (en) * | 2014-11-26 | 2015-03-04 | 无锡华普微电子有限公司 | Radio IC micro-power wireless remote transmission circuit |
| CN105642070A (en) * | 2016-03-04 | 2016-06-08 | 马翼 | Novel compressed air purifying system based on Internet of Things |
| CN111614365A (en) * | 2020-05-28 | 2020-09-01 | 成都航天凯特机电科技有限公司 | Radio frequency transmitting module for 2.4GHz |
-
2009
- 2009-09-09 CN CN2009202327421U patent/CN201477734U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414006A (en) * | 2013-08-13 | 2013-11-27 | 常州智梭传感科技有限公司 | Ultra-thin passive wireless acoustic surface wave sensor |
| CN104392597A (en) * | 2014-11-26 | 2015-03-04 | 无锡华普微电子有限公司 | Radio IC micro-power wireless remote transmission circuit |
| CN105642070A (en) * | 2016-03-04 | 2016-06-08 | 马翼 | Novel compressed air purifying system based on Internet of Things |
| CN105642070B (en) * | 2016-03-04 | 2018-08-07 | 深圳市达迪尔智能电器有限公司 | A kind of compressed air purification system based on Internet of Things |
| CN111614365A (en) * | 2020-05-28 | 2020-09-01 | 成都航天凯特机电科技有限公司 | Radio frequency transmitting module for 2.4GHz |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20180909 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |