CN210327508U

CN210327508U - Power amplification unit based on 3dB electrical bridge

Info

Publication number: CN210327508U
Application number: CN201921061194.0U
Authority: CN
Inventors: 杨燕
Original assignee: Chengdu Jingli Electronic Technology Co ltd
Current assignee: Chengdu Jingli Electronic Technology Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-04-14
Anticipated expiration: 2029-07-09

Abstract

The utility model discloses a power amplification unit based on 3dB electrical bridge, including ATT circuit, adjustable electricity attenuator and first power amplifier tube, ATT circuit one end is the RF input, and adjustable electricity attenuator input is connected to the output, and adjustable electricity attenuator output connects first power amplifier tube, and it still includes first 3dB electrical bridge, second power amplifier tube and third power amplifier tube, the input of first 3dB electrical bridge is connected to first power amplifier tube output, and 0 port of first 3dB electrical bridge connects second power amplifier tube input, -90 port connects the input of third power amplifier tube, the output termination of second power amplifier tube is-90 port of second 3dB electrical bridge, and the output termination of third power amplifier tube is 0 port of second 3dB electrical bridge. The utility model discloses an increase the 3dB electric bridge, adopt the 3dB electric bridge to close the way technique, realize can effectively reduce the consumption and the assembly degree of difficulty under the condition that does not require high-power output (< 5W) to the low-frequency channel.

Description

Power amplification unit based on 3dB electrical bridge

Technical Field

The utility model belongs to the technical field of the communication, concretely relates to low frequency channel when power output is less than 5W power amplification unit based on 3dB electric bridge.

Background

The power amplifier is used for amplifying weak signals from the front-stage amplifier and promoting the amplification of the signals. Different power amplifiers are also different in internal signal processing, circuit design and production process due to the consideration of power, impedance, distortion, dynamics and different application ranges and control and regulation functions.

In the design of a power amplifier, if a power amplifier is needed to realize the output power of 2W-3W, a GaN power amplifier tube with higher output power is selected to realize the output power because the output end is considered to be provided with an isolator. However, for such an application where the power requirement is not particularly high, it is inevitable to choose this design of the concept somewhat "large and small". Moreover, the selection directly sacrifices more power consumption, the cost is higher, the later maintenance cost is increased, and more heat dissipation conditions, the reliability of the product and the like need to be considered in the design process.

Disclosure of Invention

In order to overcome the defects, the inventor of the utility model continuously changes and innovates through long-term exploration and trial and a plurality of times of experiments and efforts, provides a power amplification unit based on a 3dB bridge, and uses a 3dB90 degree bridge combining technology to simply realize the index of low power output without sacrificing too much power consumption.

In order to realize the purpose, the utility model adopts the technical scheme that: a power amplification unit based on a 3dB bridge comprises an ATT circuit, an adjustable power modulation attenuator and a first power amplifier tube, wherein one end of the ATT circuit is an RF input end, an output end of the ATT circuit is connected with an input end of the adjustable power modulation attenuator, an output end of the adjustable power modulation attenuator is connected with a first power amplifier tube, the power amplification unit further comprises a first 3dB bridge, a second power amplifier tube and a third power amplifier tube, an output end of the first power amplifier tube is connected with an input end of the first 3dB bridge, a 0-degree port of the first 3dB bridge is connected with an input end of the second power amplifier tube, a-90-degree port of the first 3dB bridge is connected with an input end of the third power amplifier tube, an output end of the second power amplifier tube is connected with a-90-degree port of the second 3dB bridge, and an output end of the third power.

According to the utility model discloses a power amplification unit based on 3dB electric bridge, its further preferred technical scheme is: the working frequency of the first 3dB bridge and the second 3dB bridge is 2GHz-4 GHz.

According to the utility model discloses a power amplification unit based on 3dB electric bridge, its further preferred technical scheme is: the output power of the first power amplifier tube is +14dBm, and the output power of the second power amplifier tube and the output power of the third power amplifier tube are +29 dBm.

According to the utility model discloses a power amplification unit based on 3dB electric bridge, its further preferred technical scheme is: the working voltage of the first power amplifier tube is 5V, the current of the first power amplifier tube is 80mA, the working voltage of the second power amplifier tube and the working voltage of the third power amplifier tube are 25V, and the current of the second power amplifier tube and the working voltage of the third power amplifier tube are 250 mA.

According to the utility model discloses a power amplification unit based on 3dB electric bridge, its further preferred technical scheme is: the attenuation of the adjustable electrically-adjusted attenuator is 0-50 dB.

Compared with the prior art the utility model has the advantages of as follows:

the utility model discloses an increase the 3dB electric bridge, adopt the 3dB electric bridge to close the way technique, realize can effectively reduce the consumption and the assembly degree of difficulty under the condition that does not require high-power output (< 5W) to the low-frequency channel.

The utility model discloses an adopt 3dB90 electric bridges can realize low insertion loss, high isolation, restrain output reflected signal effectively, protect the power amplifier, improve output return loss.

The utility model discloses an adopt the 3dB electric bridge, reduce the scheme cost effectively improves product efficiency for the market competition of product is stronger.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic block diagram of the design of the present invention.

The labels in the figure are respectively: the power amplifier comprises an ATT circuit 1, an adjustable electrically-tuned attenuator 2, a first power amplifier tube 3, a first 3dB bridge 4, a third power amplifier tube 5, a second power amplifier tube 6 and a second 3dB bridge 7.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. 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. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Examples

As shown in fig. 1: a power amplification unit based on a 3dB bridge comprises an ATT circuit 1, an adjustable voltage regulation attenuator 2, a first power amplifier tube 3, a first 3dB bridge 4, a second 3dB bridge 7, a second power amplifier tube 6 and a third power amplifier tube 5. One end of the ATT circuit is an RF input end, the output end of the ATT circuit is connected with the input end of an adjustable electrical modulation attenuator, the output end of the adjustable electrical modulation attenuator is connected with a first power amplification tube, the output end of the first power amplification tube is connected with the input end of a first 3dB bridge, a 0-degree port of the first 3dB bridge is connected with the input end of a second power amplification tube, a-90-degree port of the first 3dB bridge is connected with the input end of a third power amplification tube, the output end of the second power amplification tube is connected with a-90-degree port of a second 3dB bridge, and the output end of the third power amplification tube is connected with.

In this embodiment, the 3dB bridge is a four-port network device including a radio frequency input port, an isolation port, a-3 dB0 ° port, and a-3 dB-90 ° port. The device has the characteristics of low insertion loss, high isolation, easy assembly of label packaging and the like, and specifically adopts a 3dB 90-degree electric bridge produced by Anaren corporation, and the device has the Model of 11306-3, and the working frequency of the device is 2GHz-4 GHz. The second power amplifier tube and the third power amplifier tube have output power of +29dBm and gain of 24dB, and after the two 3dB 90-degree electric bridges are combined, the total output power can reach more than +32 dBm. In this embodiment, the attenuation of the tunable attenuator is required to be 0-50dB, the working voltage of the first power amplifier tube is 5V, the current is 80mA, the working voltages of the second power amplifier tube and the third power amplifier tube are 25V, the current is 250mA, the output powers of the second power amplifier tube and the third power amplifier tube are +29dBm, and the gain is 24 dB.

During work, a radio frequency signal of 10dBm is input at the input end of the ATT circuit, then the radio frequency signal is output to 8dBm after passing through the ATT circuit and the adjustable electrically-tunable attenuator, the radio frequency signal is output to a first 3dB bridge from 14dBm after passing through a first power amplifier tube, then the output power of the two same power amplifier tubes is +29dBm, the gain is 24dB, and the power of the two same power amplifier tubes reaches more than 32dBm after being combined by the bridges.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The utility model provides a power amplification unit based on 3dB electric bridge, includes ATT circuit, adjustable electrically-tuned attenuator and first power amplifier tube, ATT circuit one end is the RF input, and adjustable electrically-tuned attenuator input is connected to the output, and first power amplifier tube, its characterized in that are connected to adjustable electrically-tuned attenuator output: the power amplifier further comprises a first 3dB bridge, a second power amplifier tube and a third power amplifier tube, wherein the output end of the first power amplifier tube is connected with the input end of the first 3dB bridge, a 0-degree port of the first 3dB bridge is connected with the input end of the second power amplifier tube, a-90-degree port of the first 3dB bridge is connected with the input end of the third power amplifier tube, an output end of the second power amplifier tube is connected with a-90-degree port of the second 3dB bridge, and an output end of the third power amplifier tube is connected with a 0-degree port of the second 3dB bridge.

2. The 3dB bridge based power amplifying unit according to claim 1, wherein the first 3dB bridge and the second 3dB bridge have an operating frequency of 2GHz-4 GHz.

3. The 3dB bridge-based power amplification unit of claim 1, wherein the output power of the first power amplifier tube is +14dBm, and the output power of the second power amplifier tube and the output power of the third power amplifier tube are +29 dBm.

4. The 3dB bridge-based power amplification unit of claim 1, wherein the first power amplifier tube has an operating voltage of 5V and a current of 80mA, and the second and third power amplifier tubes have an operating voltage of 25V and a current of 250 mA.

5. The power amplification unit based on the 3dB bridge according to claim 1, wherein the attenuation of the adjustable electrically tunable attenuator is 0-50 dB.