CN215818636U - Lora signal amplifier - Google Patents
Lora signal amplifier Download PDFInfo
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- CN215818636U CN215818636U CN202122213644.7U CN202122213644U CN215818636U CN 215818636 U CN215818636 U CN 215818636U CN 202122213644 U CN202122213644 U CN 202122213644U CN 215818636 U CN215818636 U CN 215818636U
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- radio frequency
- lora
- frequency switch
- downlink
- uplink
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Abstract
The utility model discloses a Lora signal amplifier, which comprises an antenna, an uplink, a downlink, a coupler, a control module, a first radio frequency switch and a second radio frequency switch, wherein the first radio frequency switch is connected with the antenna; the input end of the uplink is connected with the antenna through the second radio frequency switch, and the output end of the uplink is connected with the first radio frequency switch; the input end of the downlink is connected with a signal source through a first radio frequency switch, and the output end of the downlink is connected with an antenna through a second radio frequency switch; the transmission line between the signal source and the first radio frequency switch is connected to the control module through the coupler, and the control module outputs uplink and downlink control signals. The uplink receives the Lora signal and the downlink transmits the Lora signal. The utility model realizes the synchronous control function of TDD signals, so that the Lora signal amplifier not only enhances the transmitting signals, but also enhances the receiving signals, thereby enlarging the coverage area of the Lora system, and covers all frequency bands of 433MHz-915MHz through the design of broadband power amplification and low noise amplification, thereby being suitable for the Lora system of all frequency points.
Description
Technical Field
The utility model relates to the field of wireless signal transmission, in particular to a Lora signal amplifier.
Background
In wireless signal transmission, there is inevitably a problem of signal attenuation, and especially in urban environments, buildings, trees, and the like have a particularly serious influence on signal attenuation, and the transmission of Lora signals also faces the problem of signal attenuation. Because the low-power consumption characteristics of the Lora system have restricted the transmitted power of Lora signal, and the Lora terminal is all by battery powered, has restricted the intensity of Lora signal more.
The working frequency bands of the Lora are 433, 868, 915MHz and the like, the existing Lora signal amplifier can only cover one frequency point, and if the existing Lora signal amplifier covers all the frequency points, more Lora signal amplifiers are needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the utility model provides a convenient to use, suitability are strong and can effectively increase the Lora signal amplifier of Lora signal coverage, can completely cover all Lora frequency points, the not enough of general Lora amplifier of solution.
The technical scheme of the utility model is as follows:
a Lora signal amplifier comprises an antenna, an uplink, a downlink, a coupler, a control module, a first radio frequency switch and a second radio frequency switch;
the input end of the uplink is connected with the antenna through the second radio frequency switch, and the output end of the uplink is connected with the first radio frequency switch;
the input end of the downlink is connected with a signal source through a first radio frequency switch, and the output end of the downlink is connected with an antenna through a second radio frequency switch;
and a transmission line between the signal source and the first radio frequency switch is connected to the control module through the coupler, and the control module outputs an uplink control signal and a downlink control signal to control the actions of the two radio frequency switches.
Specifically, the uplink receives the Lora signal, and the downlink transmits the Lora signal.
Preferably, the uplink includes a low noise amplifier and a band pass filter connected in sequence.
Preferably, the downlink comprises a gain module and a power amplifier which are connected in sequence.
Preferably, the control module comprises a detector and a comparator which are connected in sequence.
Preferably, the coupler is a 3dB coupler.
The utility model has the advantages that:
1. the Lora signal amplifier provided by the utility model realizes the synchronous control function of TDD signals, so that the Lora signal amplifier not only enhances the transmitting signals, but also enhances the receiving signals, thereby enlarging the coverage area of the Lora system.
2. The utility model covers all frequency bands of 433MHz-915MHz through the design of broadband power amplifier and low noise amplifier, thereby being suitable for the Lora system of all frequency points.
Drawings
The utility model is further described with reference to the following figures and examples:
fig. 1 is a schematic block diagram of the structure of the Lora signal amplifier of the present invention.
Detailed Description
Example (b):
in order to solve the problem that the transmission distance is limited due to the fact that the existing Lora system is low in signal attenuation and transmitting power, the Lora signal amplifier for the Lora frequency band is designed, the Lora signal amplifier is externally connected to a receiving and transmitting port of equipment such as a Lora gateway and a Lora terminal, the coverage range of the Lora signal can be greatly increased, and the problem of transmission dead angles frequently existing in the Lora system can be effectively solved.
As shown in fig. 1, the Lora signal amplifier of the present invention includes an antenna, an uplink, a downlink, a 3dB coupler, a control module, a first rf switch, and a second rf switch; the input end of the uplink is connected with the antenna through the second radio frequency switch, and the output end of the uplink is connected with the first radio frequency switch; the input end of the downlink is connected with a signal source through a first radio frequency switch, and the output end of the downlink is connected with an antenna through a second radio frequency switch; and a transmission line between the signal source and the first radio frequency switch is connected to the control module through the 3dB coupler, and the control module outputs an uplink control signal and a downlink control signal to control the actions of the two radio frequency switches.
Specifically, the uplink receives the Lora signal, and the downlink transmits the Lora signal.
Further, the uplink comprises a low noise amplifier and a band-pass filter which are connected in sequence. In the uplink, after the antenna senses the signal, the signal passes through the radio frequency switch, then is amplified by the low noise amplifier, then is filtered by the filter, and finally is output from the radio frequency switch.
Further, the downlink comprises a gain module and a power amplifier which are connected in sequence. After entering the gain module from the radio frequency switch, the input signal enters the power amplifier for power amplification, and the output signal is transmitted to the antenna through the radio frequency switch.
The lower link and the down link cover all frequency bands of 433MHz-915MHz through broadband power amplification and low noise amplification design, thereby being suitable for a Lora system with all frequency points.
Furthermore, the control module comprises a detector and a comparator, an input signal is coupled to the control module through the 3dB coupler, and an uplink control signal and a downlink control signal are finally output. The control module detects the signal intensity through the detector, if the detected signal intensity is larger than a threshold value, the control module judges that the signal intensity is in a transmitting state, the control module opens a downlink and closes an uplink, and at the moment, the downlink starts to transmit a Lora signal to the antenna; if the signal detected by the control module is smaller than the threshold value, the receiving state is judged, the control module opens the uplink and closes the downlink, and at the moment, the module starts to receive the Lora signal from the antenna.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the utility model are covered in the protection scope of the utility model.
Claims (6)
1. A Lora signal amplifier is characterized by comprising an antenna, an uplink, a downlink, a coupler, a control module, a first radio frequency switch and a second radio frequency switch;
the input end of the uplink is connected with the antenna through the second radio frequency switch, and the output end of the uplink is connected with the first radio frequency switch;
the input end of the downlink is connected with a signal source through a first radio frequency switch, and the output end of the downlink is connected with an antenna through a second radio frequency switch;
and a transmission line between the signal source and the first radio frequency switch is connected to the control module through the coupler, and the control module outputs an uplink control signal and a downlink control signal to control the actions of the two radio frequency switches.
2. The Lora signal amplifier of claim 1, wherein the uplink receives and the downlink transmits Lora signals.
3. The Lora signal amplifier of claim 2, wherein the uplink includes a low noise amplifier and a band pass filter connected in series.
4. The Lora signal amplifier of claim 3, wherein the downlink comprises a gain module and a power amplifier connected in series.
5. The Lora signal amplifier of claim 2, wherein the control module comprises a detector and a comparator connected in sequence.
6. The Lora signal amplifier of claim 5, wherein the coupler is a 3dB coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122213644.7U CN215818636U (en) | 2021-09-14 | 2021-09-14 | Lora signal amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122213644.7U CN215818636U (en) | 2021-09-14 | 2021-09-14 | Lora signal amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215818636U true CN215818636U (en) | 2022-02-11 |
Family
ID=80159790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122213644.7U Active CN215818636U (en) | 2021-09-14 | 2021-09-14 | Lora signal amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215818636U (en) |
-
2021
- 2021-09-14 CN CN202122213644.7U patent/CN215818636U/en active Active
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