CN208939930U - Broadband receiver radio frequency front-end device - Google Patents
Broadband receiver radio frequency front-end device Download PDFInfo
- Publication number
- CN208939930U CN208939930U CN201821614046.2U CN201821614046U CN208939930U CN 208939930 U CN208939930 U CN 208939930U CN 201821614046 U CN201821614046 U CN 201821614046U CN 208939930 U CN208939930 U CN 208939930U
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- CN
- China
- Prior art keywords
- circuit
- radio frequency
- mask frame
- frequency front
- broadband receiver
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of broadband receiver radio frequency front-end devices; including upper cover plate, upper mask frame, the circuit board, lower mask frame, lower cover plate set gradually from top to bottom; sequentially connected preselector, low noise amplifier circuit, I/Q lower frequency changer circuit, coupling circuit, base band linear amplifier circuit and channel selectivity circuit are integrated on the circuit board, the preselector includes sequentially connected lightning protection circuit, attenuator, filter circuit.The isolation of interference signal is realized using upper mask frame, lower mask frame；Lightning protection circuit is arranged in the front end of preselector, prevents high level or lightning strike signals from entering subsequent conditioning circuit damage whole device；Direct current is isolated using coupling circuit, avoids interfering；It is designed using foregoing circuit, can effectively improve the performance of this broadband receiver radio frequency front-end device.
Description
Technical field
The utility model relates to radio frequency arts, and in particular to a kind of broadband receiver radio frequency front-end device.
Background technique
With the development of electronic information technology, signal band is more and more wider.Headend equipment of the receiver as acquisition signal,
Its performance plays very important effect in entire communication system.Its packet of existing broadband receivers machine radio frequency front-end device
Include preselector, local oscillator, frequency mixer etc..Broadband receiver is substantially the very mature technology of gate technique, how it is existing at
The performance that radio-frequency front-end is further increased on the basis of ripe is considerable thing.
Utility model content
In order to solve the above-mentioned technical problem the utility model provides a kind of broadband receiver radio frequency front-end device.
The utility model is achieved through the following technical solutions:
Broadband receiver radio frequency front-end device, including set gradually from top to bottom upper cover plate, upper mask frame, circuit board,
Lower mask frame, lower cover plate are integrated with sequentially connected preselector, low noise amplifier circuit, I/Q down coversion electricity on the circuit board
Road, coupling circuit, base band linear amplifier circuit and channel selectivity circuit, the preselector include sequentially connected lightning strike protection electricity
Road, attenuator, filter circuit.The isolation of interference signal is realized using upper mask frame, lower mask frame；Thunder is arranged in the front end of preselector
Protection circuit is hit, prevents high level or lightning strike signals from entering subsequent conditioning circuit damage whole device；Using coupling circuit to direct current into
Row isolation, avoids interfering；It is designed using foregoing circuit, can effectively improve the performance of this broadband receiver radio frequency front-end device.
Preferably, the lightning protection circuit includes the lightning protected circuit of prime and is connected to the lightning protected circuit of prime
The second level lightning protection circuit of rear end, the lightning protected circuit of prime are discharge tube.This programme is using discharge tube as level-one
Lightning protected circuit, the voltage at both ends exceeds it when protecting specification value, inside will appear short circuit phenomenon, and sponge input
Mistake high pressure, as prime, high reliablity improves the performance of broadband receiver radio frequency front-end device.
Further, the second level lightning protection circuit includes that anode is connected to the lightning protected circuit rear end of prime and cathode
The first diode that is connected with power supply line, cathode is connected with first diode anode and the second diode, the cathode of plus earth
It is connect with power supply line and the third diode of plus earth.This programme, as diode protection, works as electric discharge using three diodes
When tube discharge is incomplete, three diodes provide a plurality of leakage path, guarantee that thunder and lightning is released completely, and it is reliable to further increase it
Property.
Preferably, the low noise amplifier circuit uses difference Cascode structure.
Preferably, the upper cover plate, upper mask frame, lower mask frame, lower cover plate are bolted to connection, the circuit
The surrounding of plate is provided with the groove being set in outside bolt, the section of the groove at be greater than quarter circular arc and less than eight/
Three-arc.In the present solution, the cavity that upper mask frame, lower mask frame are formed is used for fixing circuit board, fixed to improve circuit board
Stability be also convenient for the setting of external interface, the surrounding of circuit board fits with upper mask frame, lower mask frame, upper mask frame,
The bolt hole and matching grooves of lower mask frame are again fixed circuit board using groove at circular hole, improve stability.
The utility model compared with prior art, has the following advantages and benefits:
1, the utility model realizes the isolation of interference signal using upper mask frame, lower mask frame；The front end of preselector is arranged
Lightning protection circuit prevents high level or lightning strike signals from entering subsequent conditioning circuit damage whole device；Using coupling circuit to direct current
It is isolated, avoids interfering；It is designed using foregoing circuit, can effectively improve the property of this broadband receiver radio frequency front-end device
Energy.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the principles of the present invention block diagram.
Fig. 3 is the functional block diagram of the utility model lightning protection circuit.
Appended drawing reference in figure are as follows:
1, upper cover plate；2, upper mask frame；3, circuit board；4, lower cover plate；5, lower mask frame.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment 1
Broadband receiver radio frequency front-end device as shown in Figure 1, 2, including set gradually from top to bottom upper cover plate 1, on
Mask frame 2, circuit board 3, lower mask frame 5, lower cover plate 4 are integrated with sequentially connected preselector, low noise on the circuit board 3
Amplifying circuit, I/Q lower frequency changer circuit, coupling circuit, base band linear amplifier circuit and channel selectivity circuit, the preselector include
Sequentially connected lightning protection circuit, attenuator, filter circuit.
Embodiment 2
Based on the above embodiment, the present embodiment is refined on the basis of the above embodiments, i.e., as shown in figure 3, described
Lightning protection circuit includes the lightning protected circuit of prime and the second level lightning strike protection electricity for being connected to the lightning protected circuit rear end of prime
Road, the lightning protected circuit of prime are discharge tube.Second level lightning protection circuit includes that anode is connected to the lightning protected electricity of prime
First diode that road rear end and cathode are connected with power supply line, cathode be connected with first diode anode and plus earth second
The third diode of diode, cathode and power supply line connection and plus earth.
Difference Cascode structure can be used in low noise amplifier circuit, increases on piece AF panel, reduces the parasitic electricity of source electrode
Sense influences, in addition, common-mode rejection ratio can also be improved.In the present embodiment, preselector, I/Q lower frequency changer circuit, coupling circuit, base band
Linear amplifier circuit and channel selectivity circuit can be selected conventional device and be electrically connected.
Embodiment 3
The present embodiment optimizes on the basis of the above embodiments, i.e., as shown in Figure 1, upper cover plate 1, upper mask frame 2, under
Mask frame 5, lower cover plate 4 are bolted to connection, and the surrounding of the circuit board 3 is provided with the groove being set in outside bolt, institute
The section of groove is stated at greater than quarter circular arc and less than eight/three-arc.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (5)
1. broadband receiver radio frequency front-end device, which is characterized in that including upper cover plate (1), the upper screen set gradually from top to bottom
Frame (2), circuit board (3), lower mask frame (5), lower cover plate (4) are covered, is integrated with sequentially connected pre-selection on the circuit board (3)
Device, low noise amplifier circuit, I/Q lower frequency changer circuit, coupling circuit, base band linear amplifier circuit and channel selectivity circuit, it is described
Preselector includes sequentially connected lightning protection circuit, attenuator, filter circuit.
2. broadband receiver radio frequency front-end device according to claim 1, which is characterized in that the lightning protection circuit packet
Include the lightning protected circuit of prime and the second level lightning protection circuit for being connected to prime thunder and lightning leadage circuit rear end, the prime thunder and lightning
Protection circuit is discharge tube.
3. broadband receiver radio frequency front-end device according to claim 2, which is characterized in that the second level lightning strike protection electricity
Road includes the first diode that anode is connected to prime thunder and lightning leadage circuit rear end and cathode is connected with power supply line, cathode and first
Diode anode is connected and the third diode of the second diode of plus earth, cathode and power supply line connection and plus earth.
4. broadband receiver radio frequency front-end device according to claim 1, which is characterized in that the low noise amplifier circuit
Using difference Cascode structure.
5. broadband receiver radio frequency front-end device according to claim 1, which is characterized in that the upper cover plate (1), upper screen
It covers frame (2), lower mask frame (5), lower cover plate (4) to be bolted to connection, the surrounding of the circuit board (3), which is provided with, to be set in
Groove outside bolt, the section of the groove is at greater than quarter circular arc and less than eight/three-arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821614046.2U CN208939930U (en) | 2018-09-30 | 2018-09-30 | Broadband receiver radio frequency front-end device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821614046.2U CN208939930U (en) | 2018-09-30 | 2018-09-30 | Broadband receiver radio frequency front-end device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208939930U true CN208939930U (en) | 2019-06-04 |
Family
ID=66723358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821614046.2U Expired - Fee Related CN208939930U (en) | 2018-09-30 | 2018-09-30 | Broadband receiver radio frequency front-end device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208939930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429971A (en) * | 2019-07-31 | 2019-11-08 | 湖北三江航天险峰电子信息有限公司 | A kind of miniaturization satellite communication mould group |
| CN110958027A (en) * | 2019-12-31 | 2020-04-03 | 深圳市广和通无线股份有限公司 | Radio frequency front-end device and radio frequency communication system |
-
2018
- 2018-09-30 CN CN201821614046.2U patent/CN208939930U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429971A (en) * | 2019-07-31 | 2019-11-08 | 湖北三江航天险峰电子信息有限公司 | A kind of miniaturization satellite communication mould group |
| CN110958027A (en) * | 2019-12-31 | 2020-04-03 | 深圳市广和通无线股份有限公司 | Radio frequency front-end device and radio frequency communication system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 Termination date: 20200930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |