CN210578444U - S-band low-noise amplifier - Google Patents
S-band low-noise amplifier Download PDFInfo
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- CN210578444U CN210578444U CN201922312975.9U CN201922312975U CN210578444U CN 210578444 U CN210578444 U CN 210578444U CN 201922312975 U CN201922312975 U CN 201922312975U CN 210578444 U CN210578444 U CN 210578444U
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Abstract
The utility model discloses an S-band low-noise amplifier, which belongs to the technical field of microwave communication, and comprises a low-noise amplifier module with a pre-filter and a feed module, wherein the low-noise amplifier module with the pre-filter comprises the pre-filter and a low-noise amplifying circuit; the output end of the pre-filter is connected with the low-noise amplifying circuit, and the output end of the feed module is connected with the low-noise amplifying circuit. The utility model discloses with low costs, small, the noise figure can satisfy current microwave communication system's needs.
Description
Technical Field
The utility model relates to a microwave communication technical field especially relates to a S wave band low noise amplifier.
Background
With the development of microwave communication technology, the performance requirements on the receiver of the communication system are higher and higher, including performance parameters such as sensitivity, noise coefficient and dynamic range of the receiver. The low noise amplifier is as the preamplification circuit of receiver, can enlarge the weak signal that the antenna was sent into to reduce whole communication system ' S noise, improve the sensitivity that communication equipment received, make things convenient for the system demodulation to go out high-efficient useful signal, improve communication system ' S operating efficiency, have decisive action to the influence of whole receiver performance, be the modern telemetering measurement, radar, guidance, a part of very important among the microwave communication systems such as electronic countermeasure, on this basis, the utility model provides an S wave band low noise amplifier, its is with low costs, and is small, and noise factor can satisfy current microwave communication system ' S needs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a S wave band low noise amplifier, it is with low costs, small, and noise figure is little, can satisfy current microwave communication system' S needs.
The purpose of the utility model is realized through the following technical scheme: an S-band low-noise amplifier comprises a low-noise amplification module with a pre-filter and a feed module, wherein the low-noise amplification module with the pre-filter comprises the pre-filter and a low-noise amplification circuit; the output end of the pre-filter is connected with the low-noise amplifying circuit, and the output end of the feed module is connected with the low-noise amplifying circuit and used for supplying power to the low-noise amplifying circuit.
Specifically, the pre-filter is a cavity filter, and is configured to provide high rejection capability for out-of-band near-end signals and filter out clutter signals.
Specifically, the low-noise amplification circuit includes a first amplifier, a first filter, a second amplifier, and a second filter, which are connected in sequence.
Specifically, the first filter is a high pass filter and the second filter is an LC filter, the first amplifier includes but is not limited to amplifier 2227L30 and the second amplifier includes but is not limited to amplifier 2730L 30. The gain of the single-stage amplifier is limited, and in order to reduce the noise of the communication system and improve the gain performance of the low-noise amplifier, a two-stage amplifier is arranged.
Specifically, the first amplifier is connected to the high-pass filter via a sixth capacitor, and the high-pass filter is connected to the second amplifier via a fifth capacitor and a seventh capacitor.
Specifically, the input end of the first amplifier is connected with the pre-filter through an SMA interface, the power supply end of the first amplifier is connected with the feed module through a ninth capacitor, a tenth capacitor, a second resistor and a third inductor, and a diode is arranged between the second resistor and the third inductor.
Specifically, the LC filter includes a first inductor and an eighth capacitor, a first end of the first inductor is connected to the output end of the second amplifier, a second end of the first inductor is connected to the output end of the feeding module, one end of the eighth capacitor is connected to the first end of the first inductor, and the other end of the eighth capacitor is connected to the radio frequency interface to output the amplified radio frequency signal.
Specifically, the feeding module comprises a first voltage stabilizer and a second voltage stabilizer which are connected in sequence and used for supplying power to the low-noise amplifying circuit.
Specifically, the first voltage regulator is specifically a step-down voltage regulator LTM8025, the second voltage regulator is specifically a voltage regulator AMS1117, the step-down voltage regulator LTM8025 converts an input 28V direct-current voltage into an 8.8V direct-current voltage, and inputs the 8.8V direct-current voltage into the voltage regulator AMS1117, and the voltage regulator AMS1117 converts the input 8.8V direct-current voltage into a 5.0V voltage to supply power to the first amplifier and the second amplifier.
Specifically, the size of the feed module is not more than 50mm × 50mm × 30mm, and the size of the low-noise amplifier module with the pre-filter is not more than 150mm × 50mm × 30 mm.
Compared with the prior art, the utility model discloses beneficial effect is:
the utility model discloses low noise amplifier includes prefilter, low noise amplifier circuit and feed module, and prefilter is used for providing the high suppression ability of outband near-end signal, filtering clutter signal, and low noise amplifier circuit is used for enlargiing the small radio frequency signal of input, and the feed module is used for supplying power for low noise amplifier circuit. The whole low-noise amplifier has low cost, small volume, high gain and low noise, and can meet the requirements of the existing microwave communication system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the figure:
fig. 1 is a circuit block diagram of a low noise amplifier according to embodiment 1 of the present invention;
fig. 2 is an appearance schematic diagram of a low noise amplifier module with a pre-filter according to embodiment 1 of the present invention;
fig. 3 is a schematic structural size diagram of a low noise amplifier module with a pre-filter according to embodiment 1 of the present invention;
fig. 4 is an external schematic view of a feeder circuit according to embodiment 1 of the present invention;
fig. 5 is a schematic diagram of the structural size of the feed circuit of embodiment 1 of the present invention;
fig. 6 is a schematic block diagram of a low-noise amplifier circuit according to embodiment 1 of the present invention;
fig. 7 is a schematic diagram of a low-noise amplification circuit according to embodiment 1 of the present invention;
fig. 8 is a schematic diagram of a feeder module circuit according to embodiment 1 of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the basis of the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, in embodiment 1, an S-band low noise amplifier specifically includes a low noise amplifier module with a pre-filter and a feeding module, where the low noise amplifier module with the pre-filter includes a pre-filter and a low noise amplifying circuit; the output end of the pre-filter is connected with the low-noise amplifying circuit, and the output end of the feed module is connected with the low-noise amplifying circuit and used for supplying power to the low-noise amplifying circuit.
Furthermore, the pre-filter is specifically a cavity filter CF-TD17-01S, the insertion loss of the cavity filter is 1.53dB, the out-of-band near-end signal high suppression capability is provided, and clutter signals are filtered.
Further, as shown in fig. 6 to 7, the low noise amplification circuit is used for amplifying a minute signal, and includes a first amplifier, a first filter, a second amplifier, and a second filter, which are connected in this order. Wherein the first filter is a high pass LC filter and the second filter is an LC filter, the first amplifier includes but is not limited to amplifier 2227L30 and the second amplifier includes but is not limited to amplifier 2730L 30. The gain of the single-stage amplifier is limited, and in order to reduce the noise of the communication system and improve the gain performance of the low-noise amplifier, a two-stage amplifier is arranged. More specifically, the first amplifier is connected to a high-pass LC filter through a sixth capacitor C6, the high-pass LC filter is connected to a radio frequency input interface (RFin pin) of the second amplifier through a fifth capacitor C5 and a seventh capacitor C7, and the second amplifier is connected to the LC filter. Specifically, the input end (pin 1) of the first amplifier is connected with the pre-filter through an SMA interface, the power supply end (pin 3) of the first amplifier is connected with the 5V dc voltage output end of the feed module through a ninth capacitor C9, a tenth capacitor C10, a second resistor R2 and a third inductor L3, and a diode D1 is arranged between the second resistor R2 and the third inductor L3. The LC filter comprises a first inductor L1 of 18NH and an eighth capacitor C8 of 100pF, wherein a first end of the first inductor is connected with an output end (RFout pin) of the second amplifier, a second end of the first inductor is connected with a 5V direct-current voltage output end of the feeding module, one end of the eighth capacitor is connected with a first end of the first inductor, and the other end of the eighth capacitor is connected to a radio frequency interface N-K to output an amplified radio frequency signal. The price of each component in the whole low-noise amplifying circuit is low, and the cost of the whole low-noise amplifier is low.
Further, as shown in fig. 8, the feeding module includes a first voltage regulator and a second voltage regulator connected in sequence, and supplies power to the low noise amplifier circuit through the rf cable. Specifically, the first voltage regulator is specifically a step-down voltage regulator LTM8025, the second voltage regulator is specifically a voltage regulator AMS1117, the step-down voltage regulator LTM8025 converts an input 28V direct-current voltage into an 8.8V direct-current voltage, and inputs the 8.8V direct-current voltage into the voltage regulator AMS1117, and the voltage regulator AMS1117 converts the input 8.8V direct-current voltage into a 5.0V voltage to supply power to the first amplifier and the second amplifier. It is further explained that, the utility model provides a module is put to feed module and the low noise of taking leading wave filter more than 6 meters apart from to guarantee that low noise amplifier circuit normally works.
In this embodiment, the performance parameters of the low noise amplifier are shown in table 1, the noise coefficient of the low noise amplifier is less than or equal to 2.5dB, the channel P1dB (input P-1) is greater than or equal to 5dBm, the signal gain can reach 42dB at most, the noise is low, the gain is high, and the requirements of the existing microwave communication system can be met.
TABLE 1 Low noise Amplifier Performance parameters
Furthermore, as shown in fig. 2-5, the size of the feeder module is not greater than 50mm × 50mm × 30mm, the specific external size is 43.2mm × 37.4mm × 20mm (without connector and mounting lug), the product has 1J 30J-9ZKP power interface, 2 SMA-K radio frequency interfaces; the size of the low-noise amplifier module with the pre-filter is not more than 150mm multiplied by 50mm multiplied by 30mm, the specific overall size is 133mm multiplied by 51mm multiplied by 24mm (length multiplied by width multiplied by height, connector and mounting lug are not included), the product has 2 radio frequency interfaces which are N-K interfaces, the whole amplifier is small in size, and the application range is wide.
The utility model discloses low noise amplifier puts module and feed module including the low noise of taking leading wave filter, and the module is put including leading wave filter, low noise amplifier circuit to the low noise of taking leading wave filter, and leading wave filter specifically is cavity filter for provide the high suppression ability of outband near-end signal, filtering clutter signal, low noise amplifier circuit are used for enlargiing the small radio frequency signal of input, and the feed module is used for supplying power for low noise amplifier circuit. The whole low-noise amplifier has low cost, small volume, high gain and low noise, and can meet the requirements of the existing microwave communication system.
The above detailed description is the detailed description of the present invention, and it can not be considered that the detailed description of the present invention is limited to these descriptions, and to the ordinary skilled person in the art to which the present invention belongs, without departing from the concept of the present invention, a plurality of simple deductions and replacements can be made, which should be regarded as belonging to the protection scope of the present invention.
Claims (10)
1. An S-band low noise amplifier, comprising: the low-noise amplifier comprises a low-noise amplifier module with a pre-filter and a feed module, wherein the low-noise amplifier module with the pre-filter comprises the pre-filter and a low-noise amplifying circuit; the output end of the pre-filter is connected with the low-noise amplifying circuit, and the output end of the feed module is connected with the low-noise amplifying circuit.
2. An S-band low noise amplifier according to claim 1, wherein: the pre-filter is specifically a cavity filter.
3. An S-band low noise amplifier according to claim 1, wherein: the low-noise amplification circuit comprises a first amplifier, a first filter, a second amplifier and a second filter which are connected in sequence.
4. An S-band low noise amplifier according to claim 3, wherein: the first filter is a high-pass filter and the second filter is an LC filter.
5. An S-band low noise amplifier according to claim 4, wherein: the first amplifier is connected with the high-pass filter through a sixth capacitor, and the high-pass filter is connected with the second amplifier through a fifth capacitor and a seventh capacitor.
6. An S-band low noise amplifier according to claim 5, wherein: the input end of the first amplifier is connected with the pre-filter through an SMA interface, the power supply end of the first amplifier is connected with the feed module through a ninth capacitor, a tenth capacitor, a second resistor and a third inductor, and a diode is arranged between the second resistor and the third inductor.
7. An S-band low noise amplifier according to claim 5, wherein: the LC filter comprises a first inductor and an eighth capacitor, wherein the first end of the first inductor is connected with the output end of the second amplifier, the second end of the first inductor is connected with the output end of the feed module, one end of the eighth capacitor is connected with the first end of the first inductor, and the other end of the eighth capacitor is connected to the radio frequency interface.
8. An S-band low noise amplifier according to claim 1, wherein: the feeding module comprises a first voltage stabilizer and a second voltage stabilizer which are connected in sequence and used for supplying power to the low-noise amplifying circuit.
9. An S-band low noise amplifier according to claim 8, wherein: the first regulator is specifically a step-down regulator LTM8025, and the second regulator is specifically a regulator AMS 1117.
10. An S-band low noise amplifier according to claim 1, wherein: the size of the feed module is not more than 50mm multiplied by 30mm, and the size of the low-noise amplifier module with the pre-filter is not more than 150mm multiplied by 50mm multiplied by 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922312975.9U CN210578444U (en) | 2019-12-20 | 2019-12-20 | S-band low-noise amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922312975.9U CN210578444U (en) | 2019-12-20 | 2019-12-20 | S-band low-noise amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210578444U true CN210578444U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922312975.9U Active CN210578444U (en) | 2019-12-20 | 2019-12-20 | S-band low-noise amplifier |
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|---|---|
| CN (1) | CN210578444U (en) |
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