CN219372395U - VHF power amplifier power synthesis circuit - Google Patents
VHF power amplifier power synthesis circuit Download PDFInfo
- Publication number
- CN219372395U CN219372395U CN202320156922.6U CN202320156922U CN219372395U CN 219372395 U CN219372395 U CN 219372395U CN 202320156922 U CN202320156922 U CN 202320156922U CN 219372395 U CN219372395 U CN 219372395U
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- transmission line
- power
- power amplifier
- line transformer
- unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model relates to the field of VHF power amplification power synthesis, and provides a VHF power amplification power synthesis circuit, which aims to reduce the volume of a product and improve the output power of a power amplifier, and comprises the following components: the power amplifier comprises at least two power amplifiers, and the capacitors of the transmission line transformer units are connected with the power amplifiers in a one-to-one correspondence manner. By adopting the mode, the output power of the power amplifier is improved while the product volume is reduced.
Description
Technical Field
The utility model relates to the field of VHF power amplification power synthesis, in particular to a VHF power amplification power synthesis circuit.
Background
The prior VHF (30-300 MHz) power amplifier mainly adopts a bridge synthesis mode, and the bridge has the defects of large volume, low power tolerance, high price and the like.
Disclosure of Invention
In order to reduce the product volume and improve the output power of the power amplifier at the same time, the application provides a VHF power amplifier power synthesis circuit.
The utility model solves the problems by adopting the following technical scheme:
the VHF power amplifier power synthesis circuit comprises: the input circuit, the power amplifier unit and the output circuit are connected in sequence, the input circuit and the output circuit are arranged with the power amplifier unit as axisymmetry,
the input circuit comprises at least one transmission line transformer unit, the transmission line transformer unit comprises a transmission line transformer and two capacitors respectively connected with the output ends of the transmission line transformer, the power amplifier unit comprises at least two power amplifiers, and the capacitors of the transmission line transformer unit are connected with the power amplifiers in a one-to-one correspondence manner.
Further, the power amplifier unit includes first to fourth power amplifiers, the input circuit includes first to third transmission line transformer units,
the transmission line transformer input ends of the second transmission line transformer unit and the third transmission line transformer unit are respectively connected with two capacitors of the first transmission line transformer unit, and the capacitors of the second transmission line transformer unit and the third transmission line transformer unit are correspondingly connected with the first power amplifier to the fourth power amplifier one by one.
Further, the impedance of the transmission line transformers in the first transmission line transformer unit is R, the impedance of the transmission line transformers in the second transmission line transformer unit and the third transmission line transformer unit is 1/2R, and the impedance of the first power amplifier to the fourth power amplifier is 1/4R.
Further, the transmission line transformer is implemented by a coaxial line.
Compared with the prior art, the utility model has the following beneficial effects: the transmission line transformer from differential to single-ended is adopted to replace a high-power bridge, so that the volume of a product is reduced, and the cost of the product is reduced; the output power of the power amplifier can also be increased by the transmission line transformer.
Drawings
Fig. 1 is a schematic diagram of a high-power combining circuit of a VHF power amplifier according to the present application.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
A VHF power amplifier high power combining circuit comprising: the input circuit, the power amplifier unit and the output circuit are connected in sequence, the input circuit and the output circuit are arranged with the power amplifier unit as axisymmetry,
the input circuit comprises at least one transmission line transformer unit, the transmission line transformer unit comprises a transmission line transformer and two capacitors respectively connected with the output ends of the transmission line transformer, the power amplifier unit comprises at least two power amplifiers, and the capacitors of the transmission line transformer unit are connected with the power amplifiers in a one-to-one correspondence manner.
Examples
As shown in fig. 1, in the present embodiment, the transmission line transformer is implemented using a coaxial line. A VHF power amplifier high power combining circuit comprising: the input circuit, the power amplifier unit and the output circuit are connected in sequence, the input circuit and the output circuit are arranged with the power amplifier unit as axisymmetry,
the power amplifier unit comprises a first power amplifier AMP3, a second power amplifier AMP2, a third power amplifier AMP1 and a fourth power amplifier AMP4, the input circuit comprises a first transmission line transformer unit to a third transmission line transformer unit, the first transmission line transformer unit comprises a coaxial line TL3 and capacitors C1 and C2, the second transmission line transformer unit comprises a coaxial line TL4 and capacitors C3 and C4, and the third transmission line transformer unit comprises a coaxial line TL5 and capacitors C5 and C6.
The signal is converted into two paths of signals with equal amplitude and opposite phases through the coaxial line TL3, one path of signals is sent to the coaxial line TL4, and the other path of signals is sent to the coaxial line TL5; the coaxial line TL4 converts the signal into two paths of signals with equal amplitude and opposite phases and transmits the signals to the power amplifiers AMP3 and AMP2 respectively; the coaxial line TL5 converts the signal into two paths of signals with equal amplitude and opposite phases and transmits the signals to the power amplifiers AMP1 and AMP4 respectively; the equal-amplitude reverse high-power signals output by the power amplifiers AMP3 and AMP2 are synthesized through the coaxial line TL7, the equal-amplitude reverse high-power signals output by the power amplifiers AMP1 and AMP4 are synthesized through the coaxial line TL6, and the high-power signals output by the coaxial lines TL6 and TL7 are output to the coaxial line TL8 for synthesis and then output. Wherein the coaxial lines TL3 and TL8 satisfy the impedance 50Ω, the coaxial lines TL4, TL5, TL6 and TL7 satisfy the impedance 25Ω, and the input/output impedance of the power amplifier is around 12.5Ω. When the input/output impedance of the power amplifier is around 25Ω, only one coaxial line unit may be employed; when the input/output impedance of the power amplifier is around 6.25, 8 coaxial line units can be added.
Claims (4)
- The VHF power amplifier power synthesis circuit is characterized by comprising: the input circuit, the power amplifier unit and the output circuit are connected in sequence, the input circuit and the output circuit are arranged with the power amplifier unit as axisymmetry,the input circuit comprises at least one transmission line transformer unit, the transmission line transformer unit comprises a transmission line transformer and two capacitors respectively connected with the output ends of the transmission line transformer, the power amplifier unit comprises at least two power amplifiers, and the capacitors of the transmission line transformer unit are connected with the power amplifiers in a one-to-one correspondence manner.
- 2. The VHF power amplifier power combining circuit according to claim 1, wherein the power amplifier unit includes first to fourth power amplifiers, the input circuit includes first to third transmission line transformer units,the transmission line transformer input ends of the second transmission line transformer unit and the third transmission line transformer unit are respectively connected with two capacitors of the first transmission line transformer unit, and the capacitors of the second transmission line transformer unit and the third transmission line transformer unit are correspondingly connected with the first power amplifier to the fourth power amplifier one by one.
- 3. The VHF power amplifier power combining circuit of claim 2, wherein the impedance of the transmission line transformer in the first transmission line transformer unit is R, the impedance of the transmission line transformers in the second transmission line transformer unit and the third transmission line transformer unit is 1/2R, and the impedance of the first power amplifier to the fourth power amplifier is 1/4R.
- 4. A VHF power amplifier power combining circuit according to any one of claims 1-3, characterized in that the transmission line transformer is implemented with a coaxial line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320156922.6U CN219372395U (en) | 2023-01-18 | 2023-01-18 | VHF power amplifier power synthesis circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320156922.6U CN219372395U (en) | 2023-01-18 | 2023-01-18 | VHF power amplifier power synthesis circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219372395U true CN219372395U (en) | 2023-07-18 |
Family
ID=87145733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320156922.6U Active CN219372395U (en) | 2023-01-18 | 2023-01-18 | VHF power amplifier power synthesis circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219372395U (en) |
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2023
- 2023-01-18 CN CN202320156922.6U patent/CN219372395U/en active Active
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