CN206077572U - A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies - Google Patents
A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies Download PDFInfo
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- CN206077572U CN206077572U CN201621077836.2U CN201621077836U CN206077572U CN 206077572 U CN206077572 U CN 206077572U CN 201621077836 U CN201621077836 U CN 201621077836U CN 206077572 U CN206077572 U CN 206077572U
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Abstract
The utility model proposes a kind of active DTV DTVs amplifier of anti-tampering 4G frequencies，It is connected between antenna and coaxial cable terminals，Overcome existing DTV digital TV antennas interference signal cannot be screened and filter so as to form the problem of strong interferers after amplification，Its input side and outlet side for being included in the LNA amplifying units have impedance matching circuit design and bandwidth-limited circuit to design，Specifically connect between LNA amplifying units and antenna and be connected to electric capacity C1、C2 and C3，Connect with coaxial cable terminals and be connected to electric capacity C5、C6、C7、C8 and C9，Wherein electric capacity C1、C2、C6、C7 and C8 are parallel with an inductance respectively，The junction point of electric capacity C1 and C2 is via electric capacity C4、Inductance L4 is grounded，The junction point of electric capacity C2 and C3 is grounded via Zener diode D1，The junction point of electric capacity C5 and C6 is grounded via electric capacity C12，The junction point of electric capacity C6 and C7 is grounded via electric capacity C13，The junction point of electric capacity C7 and C8 is grounded via electric capacity C14，The junction point of electric capacity C8 and C9 is grounded via electric capacity C15.
Description
Technical field
This utility model belongs to field of wireless communication, and in particular to a kind of active DTV DTVs of anti-tampering 4G frequencies are put
Big device.
Background technology
The operation principle of existing active DTV digital TV antennas is：Antenna oscillator is by the aerial weak electromagnetic for receiving
Ripple（Comprising useful signal and interference signal）, amplifier is sent in the lump by coaxial cable（LNA）Do most basic signal to amplify；
So, the interference signal gain after amplification is very strong, and stronger interference source is formed in fixed spatial domain, and 4G frequency signals are connect
Receive and the microwave communication of side frequency causes severe jamming, make the relevant device cannot normal work.
Utility model content
To overcome the existing DTV digital TV antennas mentioned in background technology screen and filter interference signal, make
Stronger interference source is formed in fixed spatial domain after must amplifying, the problem of relevant device normal work, this utility model is affected
A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies is proposed, its particular technique content is as follows：
A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies, is connected between antenna and coaxial cable terminals,
Which includes LNA amplifying units, and the LNA amplifying units have source, rf inputs and RF output end, in the rf inputs
Connect between antenna and be connected to electric capacity C1, C2 and C3, connect between the RF output end and coaxial cable terminals and be connected to electric capacity
C5, C6, C7, C8 and C9, electric capacity C1 two ends parallel connections are connected to inductance L2, and electric capacity C2 two ends parallel connections are connected to inductance L3, the electric capacity
The junction point of C1 and C2 is grounded via electric capacity C4, inductance L4, and the junction point of electric capacity C2 and C3 is grounded via Zener diode D1, should
Electric capacity C6 two ends parallel connections are connected to inductance L5, and electric capacity C7 two ends parallel connections are connected to inductance L6, and electric capacity C8 two ends parallel connections are connected to inductance
The junction point of L7, electric capacity C5 and C6 is grounded via electric capacity C12, and the junction point of electric capacity C6 and C7 is grounded via electric capacity C13, should
The junction point of electric capacity C7 and C8 is grounded via electric capacity C14, and the junction point of electric capacity C8 and C9 is grounded via electric capacity C15, and this is coaxial
Cable termination is connected to the source of LNA amplifying units, the connection of inductance L1 and diode D3 via inductance L1, diode D3
Point is grounded via electric capacity C16, is connected with inductance L8 between the source and RF output end of the LNA amplifying units.
In the middle of one or more embodiments of the present utility model, the source of the LNA amplifying units is connected with LED instructions
Lamp.
In the middle of one or more embodiments of the present utility model, the LNA amplifying units are using model BGA2709 series
Microwave band-pass amplification chip.
The beneficial effects of the utility model are：Have for 4G and related in input side and the outlet side of the LNA amplifying units
Frequency range impedance matching circuit design and bandwidth-limited circuit design, overcome existing DTV digital TV antennas cannot screen and
Interference signal is filtered so as to form the problem of strong interferers after amplification, lock the receives frequency scope of antenna, examination, decay,
Interference signal is filtered, antenna gain is improved, it is to avoid the reception of 4G frequency signals and the microwave communication of side frequency caused sternly
Disturb again.
Description of the drawings
Fig. 1 is the active DTV DTVs amplifier circuit schematic diagram of anti-tampering 4G frequencies of the present utility model.
Specific embodiment
Below in conjunction with accompanying drawing, application scheme is further described：
A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies, is connected to antenna ANT and coaxial cable terminals
Between RF1, which includes LNA amplifying units, and the LNA amplifying units amplify core using the microwave band-pass of model BGA2709 series
Piece, which has source VS, rf inputs IN and RF output end RF OUT, between rf inputs IN and antenna ANT
Series connection is connected to electric capacity C1, C2 and C3, connects and be connected to electric capacity between RF output end RF OUT and coaxial cable terminals RF1
C5, C6, C7, C8 and C9, electric capacity C1 two ends parallel connections are connected to inductance L2, and electric capacity C2 two ends parallel connections are connected to inductance L3, the electric capacity
The junction point of C1 and C2 is grounded via electric capacity C4, inductance L4, and the junction point of electric capacity C2 and C3 is grounded via Zener diode D1, should
Electric capacity C6 two ends parallel connections are connected to inductance L5, and electric capacity C7 two ends parallel connections are connected to inductance L6, and electric capacity C8 two ends parallel connections are connected to inductance
The junction point of L7, electric capacity C5 and C6 is grounded via electric capacity C12, and the junction point of electric capacity C6 and C7 is grounded via electric capacity C13, should
The junction point of electric capacity C7 and C8 is grounded via electric capacity C14, and the junction point of electric capacity C8 and C9 is grounded via electric capacity C15, and this is coaxial
Cable termination is connected to source VS of LNA amplifying units, the company of inductance L1 and diode D3 via inductance L1, diode D3
Contact is grounded via electric capacity C16, is connected with inductance L8 between source VS and RF output end RF OUT of the LNA amplifying units,
Source VS of the LNA amplifying units is connected with LED light.
Above-mentioned preferred implementation should be regarded as the illustration of application scheme embodiment, all and application scheme thunder
Technology deduction that is same, making approximately or based on this, replacement, improvement etc., are regarded as the protection domain of this patent.
Claims (3)
1. a kind of active DTV DTVs amplifier of anti-tampering 4G frequencies, is connected between antenna and coaxial cable terminals, its
It is characterised by：Including LNA amplifying units, the LNA amplifying units have source, rf inputs and RF output end, penetrate in this
Connect between frequency input terminal and antenna and be connected to electric capacity C1, C2 and C3, connect between the RF output end and coaxial cable terminals
Electric capacity C5, C6, C7, C8 and C9 are connected to, electric capacity C1 two ends parallel connections are connected to inductance L2, electric capacity C2 two ends parallel connections are connected to inductance
The junction point of L3, electric capacity C1 and C2 is grounded via electric capacity C4, inductance L4, and the junction point of electric capacity C2 and C3 is via Zener diode
D1 is grounded, and electric capacity C6 two ends parallel connections are connected to inductance L5, and electric capacity C7 two ends parallel connections are connected to inductance L6, and electric capacity C8 two ends are in parallel
Inductance L7 is connected to, the junction point of electric capacity C5 and C6 is grounded via electric capacity C12, and the junction point of electric capacity C6 and C7 is via electric capacity
C13 is grounded, and the junction point of electric capacity C7 and C8 is grounded via electric capacity C14, and the junction point of electric capacity C8 and C9 is connect via electric capacity C15
Ground, the coaxial cable terminals are connected to the source of LNA amplifying units, inductance L1 and two poles via inductance L1, diode D3
The junction point of pipe D3 is grounded via electric capacity C16, is connected with inductance L8 between the source and RF output end of the LNA amplifying units.
2. the active DTV DTVs amplifier of anti-tampering 4G frequencies according to claim 1, it is characterised in that：The LNA is put
The source of big unit is connected with LED light.
3. the active DTV DTVs amplifier of anti-tampering 4G frequencies according to claim 1, it is characterised in that：The LNA is put
Microwave band-pass amplification chip of the big unit using model BGA2709 series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077836.2U CN206077572U (en) | 2016-09-23 | 2016-09-23 | A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077836.2U CN206077572U (en) | 2016-09-23 | 2016-09-23 | A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies |
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| Publication Number | Publication Date |
|---|---|
| CN206077572U true CN206077572U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621077836.2U Active CN206077572U (en) | 2016-09-23 | 2016-09-23 | A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572533A (en) * | 2019-09-19 | 2019-12-13 | 东莞市百傲电子科技有限公司 | Electrodeless adjustable active DTV digital television amplifier with display timing function |
-
2016
- 2016-09-23 CN CN201621077836.2U patent/CN206077572U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572533A (en) * | 2019-09-19 | 2019-12-13 | 东莞市百傲电子科技有限公司 | Electrodeless adjustable active DTV digital television amplifier with display timing function |
| CN110572533B (en) * | 2019-09-19 | 2024-02-27 | 江西创新科技有限公司 | Electrodeless adjustable band display time-consuming DTV digital television amplifier |
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