CN106788492A - A kind of radio frequency modulation device - Google Patents
A kind of radio frequency modulation device Download PDFInfo
- Publication number
- CN106788492A CN106788492A CN201611185777.5A CN201611185777A CN106788492A CN 106788492 A CN106788492 A CN 106788492A CN 201611185777 A CN201611185777 A CN 201611185777A CN 106788492 A CN106788492 A CN 106788492A
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- resistor
- triode
- inductance
- tunable capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
Abstract
The invention discloses a kind of radio frequency modulation device, it is made up of dc source, first resistor to 3rd resistor, the first electric capacity to the 4th electric capacity, triode, inductance, tunable capacitor and antenna, using the PNP type triode of model C 3355, cut-off frequency is thousands of MHZ, its power is 600MW, for fm band enough, then in conjunction with improved circuit, the transmitting range of modulating emission circuit is effectively improved.Compared with prior art, the present invention effectively amplifies signal using the triode of high power, and the circuit in conjunction with periphery is aided in, launched from antenna by inductance, can effectively improve transmitting range, using a small number of components, ensure portability, easy to use, the value with popularization and application.
Description
Technical field
The present invention relates to a kind of wireless device, more particularly to a kind of radio frequency modulation device.
Background technology
Radio refers to the electromagnetic wave propagated in all free spaces (including air and vacuum), is that one of those is limited
Frequency band, upper limiting frequency, in various Radio Specification books, common are 3KHz in 300GHz (GHz), lower frequency limit compared with disunity
~300GHz (ITU- International Telecommunication Union regulation), 9KHz~300GHz, 10KHz~300GHz.In the prior art, radio
The transmitting range of equipment is shorter, especially small-sized wireless device, if increase distance, needs the circuit and big work(of complexity
The device of rate, therefore, in the case where guarantee is portable, it is necessary to improve its transmission power.
The content of the invention
The purpose of the present invention is that and provide a kind of radio frequency modulation device in order to solve the above problems.
The present invention is achieved through the following technical solutions above-mentioned purpose：
The present invention by dc source, first resistor to 3rd resistor, the first electric capacity to the 4th electric capacity, triode, inductance, can
Electric capacity and antenna composition are adjusted, dc source is 6V, first resistor is 100 Ω, second resistance is 400 Ω, 3rd resistor is 500
Ω, the first electric capacity are 300uf, the second electric capacity is 470uf, the 3rd electric capacity is 100uf, the 4th electric capacity is 1000uf, triode is
PNP type triode, inductance are formed for the circle of 1mm enamel-covered wires coiling 15, and tap is drawn at middle 5 circle, and tunable capacitor is the height of 5/25P
Frequently half tunable capacitor.
Specifically, the positive pole of dc source first end, the first end of the inductance simultaneously with the first resistor
Connected with the first end of the tunable capacitor, it is the negative pole of dc source first end simultaneously with the second resistance, described
The first end connection of the first end of the second electric capacity, the first end of the 3rd resistor and the 4th electric capacity, the second resistance
The second end be connected with the first end of first electric capacity after as signal input part, the second end of first electric capacity simultaneously with
The base stage connection at the second end of the first resistor, the second end of second electric capacity and the triode, the triode
Colelctor electrode is connected with the first end at the second end of the inductance, the second end of the tunable capacitor and the 3rd electric capacity simultaneously,
The tap of the inductance is connected with the antenna, the second end of the 3rd electric capacity emitter stage, institute simultaneously with the triode
State the second end connection at second end and the 4th electric capacity of 3rd resistor.
The beneficial effects of the present invention are：
The present invention is a kind of radio frequency modulation device, and compared with prior art, the present invention is effective using the triode of high power
Amplification signal, in conjunction with periphery circuit aid in, launched from antenna by inductance, can effectively improve transmitting away from
From using a small number of components, it is ensured that portability, easy to use, the value with popularization and application.
Brief description of the drawings
Fig. 1 is circuit structure schematic diagram of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1：The present invention is by dc source, first resistor R1 to 3rd resistor R3, the first electric capacity C1 to the 4th electricity
Hold C4, triode VT, inductance L, tunable capacitor CT and antenna TX composition, dc source is that 6V, first resistor R1 are 100 Ω, the
Two resistance R2 are that 400 Ω, 3rd resistor R3 are that 500 Ω, the first electric capacity C1 are that 300uf, the second electric capacity C2 are 470uf, the 3rd electricity
Appearance C3 be 100uf, the 4th electric capacity C4 be 1000uf, triode VT be PNP type triode, inductance L be the circle of 1mm enamel-covered wires coiling 15
Form, tap is drawn at middle 5 circle, tunable capacitor CT is the tunable capacitor of high frequency half of 5/25P.
Specifically, the positive pole of dc source first end, the first of the inductance L simultaneously with the first resistor R1
The first end of end and the tunable capacitor CT is connected, the negative pole of the dc source simultaneously with the second resistance R2 first
End, the first end connection of the first end, the first end of the 3rd resistor R3 and the 4th electric capacity C4 of the second electric capacity C2,
Second end of the second resistance R2 be connected with the first end of the first electric capacity C1 after as signal input part, it is described first electricity
Hold second end of C1 simultaneously with second end of the first resistor R1, second end of the second electric capacity C2 and the triode VT
Base stage connection, the colelctor electrode of the triode VT the second end, second end of the tunable capacitor CT simultaneously with the inductance L
First end with the 3rd electric capacity C3 is connected, and the tap of the inductance L is connected with the antenna TX, the 3rd electric capacity C3's
Second end is simultaneously with the second of the emitter stage of the triode VT, second end of the 3rd resistor R3 and the 4th electric capacity C4
End connection.
Operation principle of the invention is as follows：
The present invention, in opening up to 1KM, is assembled by schematic diagram and tested using high current transmitting, and triode will be selected
Multiplication factor with blue dot mark is greater than 80 times, but finds that its frequency is not to fall in 88-108MHZ just in an experiment
Within normal fm band, but electric capacity and inductance are adjusted in any case, be below the frequency for being about seventies MHZ of 88MHZ
On rate point, receiver can just be normally received, and the fT cut-off frequencies parameter value of the triode not enough, does not put forward its frequency of oscillation
Go.
In order that transmitting range improves and its frequency can be made to fall within the range of receiving of normal FM receiver, have to
Find other high-frequency triode and be used as the higher-order of oscillation or power amplification circuit, with its it is powerful output come increase transmitting away from
From using the PNP type triode of model C 3355, cut-off frequency is thousands of MHZ, and its power is 600MW, for fm band
Enough, then in conjunction with improved circuit, the transmitting range of modulating emission circuit is effectively improved.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (2)
1. a kind of radio frequency modulation device, it is characterised in that：By dc source, first resistor to 3rd resistor, the first electric capacity extremely
4th electric capacity, triode, inductance, tunable capacitor and antenna composition, dc source is 6V, first resistor is 100 Ω, second resistance
For 400 Ω, 3rd resistor be 500 Ω, the first electric capacity be 300uf, the second electric capacity be 470uf, the 3rd electric capacity be 100uf, the 4th
Electric capacity is that 1000uf, triode are that PNP type triode, inductance are formed for the circle of 1mm enamel-covered wires coiling 15, is drawn at middle 5 circle and taken out
Head, tunable capacitor is the tunable capacitor of high frequency half of 5/25P.
2. radio frequency modulation device according to claim 1, it is characterised in that：The positive pole of the dc source simultaneously with institute
The first end connection of the first end, the first end of the inductance and the tunable capacitor of first resistor is stated, the dc source
Negative pole simultaneously with the first end of the second resistance, the first end of second electric capacity, the first end of the 3rd resistor and institute
The first end connection of the 4th electric capacity is stated, conduct is believed after the second end of the second resistance is connected with the first end of first electric capacity
Number input, the second end of first electric capacity the second end, the second end of second electric capacity simultaneously with the first resistor
Connected with the base stage of the triode, the colelctor electrode of the triode the second end, the tunable capacitor simultaneously with the inductance
The second end and the 3rd electric capacity first end connection, the tap of the inductance is connected with the antenna, the 3rd electric capacity
The second end connect with the second end of the emitter stage of the triode, the second end of the 3rd resistor and the 4th electric capacity simultaneously
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185777.5A CN106788492A (en) | 2016-12-21 | 2016-12-21 | A kind of radio frequency modulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185777.5A CN106788492A (en) | 2016-12-21 | 2016-12-21 | A kind of radio frequency modulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106788492A true CN106788492A (en) | 2017-05-31 |
Family
ID=58894202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611185777.5A Pending CN106788492A (en) | 2016-12-21 | 2016-12-21 | A kind of radio frequency modulation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106788492A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504978A (en) * | 2019-09-06 | 2019-11-26 | 黄勇 | Distant signal frequency modulation repeater-transmitter |
| CN113890572A (en) * | 2021-11-17 | 2022-01-04 | 郑州西亚斯学院 | High-performance Bluetooth communication circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202663388U (en) * | 2012-05-08 | 2013-01-09 | 四川欧润特软件科技有限公司 | Remote frequency modulation transmitting device of radio |
| CN203193616U (en) * | 2013-04-17 | 2013-09-11 | 成都掌握移动信息技术有限公司 | Low-power high-sensitivity frequency band transmitter |
| CN104702297A (en) * | 2013-12-04 | 2015-06-10 | 成都博智维讯信息技术有限公司 | Radio audio amplitude modulation transmitter |
| CN104754479A (en) * | 2013-12-30 | 2015-07-01 | 天津华辰晟宏科技有限公司 | Wireless microphone for office meetings |
-
2016
- 2016-12-21 CN CN201611185777.5A patent/CN106788492A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202663388U (en) * | 2012-05-08 | 2013-01-09 | 四川欧润特软件科技有限公司 | Remote frequency modulation transmitting device of radio |
| CN203193616U (en) * | 2013-04-17 | 2013-09-11 | 成都掌握移动信息技术有限公司 | Low-power high-sensitivity frequency band transmitter |
| CN104702297A (en) * | 2013-12-04 | 2015-06-10 | 成都博智维讯信息技术有限公司 | Radio audio amplitude modulation transmitter |
| CN104754479A (en) * | 2013-12-30 | 2015-07-01 | 天津华辰晟宏科技有限公司 | Wireless microphone for office meetings |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504978A (en) * | 2019-09-06 | 2019-11-26 | 黄勇 | Distant signal frequency modulation repeater-transmitter |
| CN113890572A (en) * | 2021-11-17 | 2022-01-04 | 郑州西亚斯学院 | High-performance Bluetooth communication circuit |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |
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| WD01 | Invention patent application deemed withdrawn after publication |