CN104639045A - Detachable double-tube efficient power amplifier module structure - Google Patents
Detachable double-tube efficient power amplifier module structure Download PDFInfo
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- CN104639045A CN104639045A CN201310544881.9A CN201310544881A CN104639045A CN 104639045 A CN104639045 A CN 104639045A CN 201310544881 A CN201310544881 A CN 201310544881A CN 104639045 A CN104639045 A CN 104639045A
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- power amplifier
- doherty
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- amplifier module
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Abstract
The invention provides a detachable double-tube efficient power amplifier module structure, relating to the field of radio and television emission manufacture. The detachable double-tube efficient power amplifier module structure comprises a signal distribution amplifying part and a flexibly-connected DOHERTY synthesis part. The signal distribution amplifying part comprises a 90-degree orthogonal distributor, two double-tube broadband push-pull power amplifiers and four blocking capacitors. An input radio-frequency signal is connected with the input end of the 90-degree orthogonal distributor. Two output ends of the 90-degree orthogonal distributor are respectively and sequentially connected with the blocking capacitors, the double-tube broadband push-pull power amplifiers and the blocking capacitors and then are connected with the DOHERTY synthesis part. The DOHERTY synthesis part comprises eight DOHERTY synthesis boards respectively manufactured according to different signal frequency bands. When in use, different frequency bands of DOHERTY synthesis boards are spliced with a distribution amplifying part A according to the requirement of the working frequency bands. The detachable double-tube efficient power amplifier module structure can realize all band coverage of digital efficient transmitter manufacture, and has the characteristics of being simple in structure, being easy to debug and saving cost.
Description
Technical field
The present invention relates to radio and television and launch manufacture field, particularly detachable Double-pipe high-efficient power amplifier module structure.
Background technology
In efficient digital TV transmitter, DOHERTY power amplifier is a core component improving transmitter frequency.Due to the technical limitations of the efficient power amplifier of DOHERTY, the frequency band of each power amplifier only has about 40MHz bandwidth, the frequency range of radio and television decimeter range is that 470 ~ 566MHz and 606 ~ 860MHz(commonly use 810MHz), each channel 8MHz bandwidth, at least needs the power amplifier of 8 different parameters could cover whole decimever television frequency range.
In prior art, the structure of DOHERTY is two single tubes utilizing ambipolar field effect power tube, optimal parameter is adjusted in the frequency range (about 40MH) needed, one is operated in A/B class and decides power amplifier, another is operated in C class and does peak value power amplifier, then carries out DOHERTY synthesis by 1/4 wavelength line, becomes an independently power amplifier module, two independent DOHERTY modules, again through 90 degree of quadrature bridges synthesis, realize PD and export.There are two outstanding shortcomings in this kind of frame mode: 1, the more complicated when design and test adjustment: first of a bipolar power single tube will be adjusted indices in the 40MHz bandwidth range needed, recycle 1/4 wavelength line and carry out DOHERTY synthesis again.Because phase mutual impedance traction when single tube output is connected with 1/4 wavelength line DOHERTY synthesis is comparatively large, adjustment workload is increased.Divide by 40MHz bandwidth frequency range, whole decimever television frequency range divides 8 frequency ranges, just needs the power amplifier of adjustment 8 different parameters, could meet frequency band coverage requirement, and workload is large, commercialization is more difficult.2, different frequency range parameter is different, uses device wide in variety, easily causes stock material to overstock.Because of the impedance transformation that single tube output is microstrip line LC structure, broadband cannot be made, the each power amplifier parameter of 8 power amplifiers covering whole decimeter wave frequency range can be different, calculate by each power amplifier at least 4 kinds of different parameters devices, 8 power amplifiers at least will use the device of 32 kinds of different parameters, use the wide in variety of device, add stock.Due to the existence of these two shortcomings, make efficient power amplifier module commercialization difficulty, be difficult to form batch, the productibility of efficient television transmitter is reduced, manufacturing cost increases.
Summary of the invention
For the shortcoming existed in above-mentioned prior art, the object of this invention is to provide detachable Double-pipe high-efficient power amplifier module structure.It can realize the Whole frequency band that digital efficient transmission machine produces and cover, have structure simple, debug easy, cost-saving feature.
In order to reach foregoing invention object, technical scheme of the present invention realizes as follows:
A kind of detachable Double-pipe high-efficient power amplifier module structure, its design feature is, it distributes amplifier section by signal and forms with the DOHERTY composite part be connected of living.Signal distributes amplifier section and comprises 90 degree of quadrature divider, two two-tube broadband push-pull power amplifiers and four capacitances.The radiofrequency signal of input is connected to the input of 90 degree of quadrature divider, and two outputs of 90 degree of quadrature divider are connected to DOHERTY composite part respectively successively after capacitance, two-tube broadband push-pull power amplifier and capacitance.DOHERTY composite part is the 8 pieces of DOHERTY hard boards made respectively according to signal frequency range difference, the DOHERTY hard board of different frequency range and distribution amplifier section A is bolted together during use according to the requirement of working frequency range.
In above-mentioned detachable Double-pipe high-efficient power amplifier module structure, 50 ohm microstrip between described each device, are used to connect.
The present invention, owing to have employed said structure, is very easy to by changing detachable DOHERTY hard board the conversion realizing operating frequency.The present invention makes the digital transmitter of different channel produce to simplify, decrease the production stock that gets the raw materials ready and reduce production cost, improve production efficiency, more easily realize mass production.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the circuit diagram of three pieces of DOHERTY hard boards in the embodiment of the present invention.
Embodiment
Referring to Fig. 1, the signal that the present invention's detachable Double-pipe high-efficient power amplifier module structure connects by living distributes amplifier section A and DOHERTY composite part B and forms.Signal distributes amplifier section A and comprises 90 degree of quadrature divider, 1, two two-tube broadband push-pull power amplifiers 3 and four capacitances 2.The radiofrequency signal of input is connected to the input of 90 degree of quadrature divider 1, and two outputs of 90 degree of quadrature divider 1 are connected to DOHERTY composite part B respectively successively after adjustable microstrip line, capacitance 2, two-tube broadband push-pull power amplifier 3 and capacitance 2.DOHERTY composite part B is 8 pieces or N block DOHERTY hard board making respectively according to signal frequency range difference, the DOHERTY hard board of different frequency range and distribution amplifier section A is bolted together during use according to the requirement of working frequency range.50 ohm microstrip are used to connect between each device.
Time prepared by the present invention, signal distributes amplifier section A and these two parts of DOHERTY composite part B one piece of circuit board separately, and structure is independent, is bolted together during application, forms a complete efficient power amplifier module.The present invention changes by changing the simple structure connecting DOHERTY hard board B of living the application realizing efficient power amplifier module unlike signal frequency range.The signal two-tube broadband push-pull power amplifier 3 distributed in amplifier section A adopts two models to be the ambipolar field effect power tube of BLF888B, and a main power amplifier doing the work of A category-B, another does the peak value power amplifier of C class work.Every only two-tube broadband push-pull power amplifier 3 adopts Ba Lun to distribute synthesis mode and the fan-out capability of power tube is adjusted to broadband, the amplifying signal that two two-tube broadband push-pull power amplifiers 3 export carries out DOHERTY synthesis by 1/4 wavelength line again, forms a complete efficient power amplifier module.Due to power amplifier part wideband operation, whole decimeter wave frequency range can being covered, distributing amplifier section A when efficient power amplifier module different frequency range work without the need to changing signal.This block circuit board of DOHERTY composite part B is the condition ensureing efficient power amplifier module efficiency operation, due to the feature of DOHERTY technology, when guaranteed efficiency index request, need to be divided into 8 or N number of frequency range according to 40MHz bandwidth, each frequency range is made up of one piece of circuit board, changes the DOHERTY hard board of different frequency range in use according to the requirement of working frequency range.Referring to Fig. 2, these 8 pieces of DOHERTY hard boards, when designing, according to the wavelength of different frequency range, design different microstrip transmission line length.For realizing changing the working frequency range that DOHERTY hard board changes efficient power amplifier module easily, to ensure when carrying out DOHERTY hard board structural design: each plate structure is measure-alike, signal link position is identical, installation fixed hole position major part is identical, and position, different hole should not interfere with each other yet.
When the present invention works, the radiofrequency signal of input is divided into two-way after 90 degree of quadrature divider 1, signal amplification is carried out to two-tube broadband push-pull power amplifier 3 respectively through 50 ohm of adjustable microstrip lines and capacitance 2, radiofrequency signal after amplification exports to the synthesis of DOHERTY hard board through capacitance 2, power output 210w.
Claims (2)
1. a detachable Double-pipe high-efficient power amplifier module structure, it is characterized in that, it distributes amplifier section (A) by signal and forms with the DOHERTY composite part (B) be connected of living, signal distributes amplifier section (A) and comprises 90 degree of quadrature divider (1), two two-tube broadbands push-pull power amplifier (3) and four capacitances (2), the radiofrequency signal of input is connected to the input of 90 degree of quadrature divider (1), two outputs of 90 degree of quadrature divider (1) are respectively successively through capacitance (2), DOHERTY composite part (B) is connected to after two-tube broadband push-pull power amplifier (3) and capacitance (2), DOHERTY composite part (B) is the 8 pieces of DOHERTY hard boards made respectively according to signal frequency range difference, the DOHERTY hard board of different frequency range and distribution amplifier section (A) is bolted together during use according to the requirement of working frequency range.
2. detachable Double-pipe high-efficient power amplifier module structure according to claim 1, is characterized in that, uses 50 ohm microstrip to connect between described each device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544881.9A CN104639045A (en) | 2013-11-07 | 2013-11-07 | Detachable double-tube efficient power amplifier module structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310544881.9A CN104639045A (en) | 2013-11-07 | 2013-11-07 | Detachable double-tube efficient power amplifier module structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104639045A true CN104639045A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310544881.9A Pending CN104639045A (en) | 2013-11-07 | 2013-11-07 | Detachable double-tube efficient power amplifier module structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634724A (en) * | 2016-07-18 | 2018-01-26 | 普天信息技术有限公司 | A kind of Doherty power amplifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070252649A1 (en) * | 2006-04-26 | 2007-11-01 | Kazumi Shiikuma | Amplifier |
| CN201398180Y (en) * | 2009-03-31 | 2010-02-03 | 武汉正维电子技术有限公司 | Doherty high-efficiency amplifier with dual carrier amplifier |
| CN102137518A (en) * | 2010-01-25 | 2011-07-27 | 上海华为技术有限公司 | Doherty power amplifier and multi-frequency band signal parameter adjusting device |
| CN202424626U (en) * | 2011-12-29 | 2012-09-05 | 武汉正维电子技术有限公司 | Multichannel asymmetric Doherty amplifier |
-
2013
- 2013-11-07 CN CN201310544881.9A patent/CN104639045A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070252649A1 (en) * | 2006-04-26 | 2007-11-01 | Kazumi Shiikuma | Amplifier |
| CN201398180Y (en) * | 2009-03-31 | 2010-02-03 | 武汉正维电子技术有限公司 | Doherty high-efficiency amplifier with dual carrier amplifier |
| CN102137518A (en) * | 2010-01-25 | 2011-07-27 | 上海华为技术有限公司 | Doherty power amplifier and multi-frequency band signal parameter adjusting device |
| CN202424626U (en) * | 2011-12-29 | 2012-09-05 | 武汉正维电子技术有限公司 | Multichannel asymmetric Doherty amplifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634724A (en) * | 2016-07-18 | 2018-01-26 | 普天信息技术有限公司 | A kind of Doherty power amplifier |
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Application publication date: 20150520 |