CN204681336U - Differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit - Google Patents
Differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit Download PDFInfo
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- CN204681336U CN204681336U CN201520284637.8U CN201520284637U CN204681336U CN 204681336 U CN204681336 U CN 204681336U CN 201520284637 U CN201520284637 U CN 201520284637U CN 204681336 U CN204681336 U CN 204681336U
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Abstract
The utility model discloses differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit, it is characterized in that, comprise pcb board, inductance and balance conducting wire, described inductance is one, described balanced conductive circuit is plotted on pcb board, and overall in " work " font, two terminals in left side are electrically connected RF_N respectively, RF_P differential balance high frequency port, described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Terminals on the right side of described " work " font are electrically connected with the single-ended non-equilibrium port of RF.The utility model carries out the bamboo product of simplification to general high frequency L-C balun match circuit, decreases the quantity of device, reaches the application requirement that wire sizes is further miniaturized, has saved cost, enhanced reliability.
Description
Technical field
The utility model relates to high-frequency circuit design field, be specifically related to the imbalance-balancing circuitry conversion of differential signal port and single-ended signal port and the unique design of impedance matching, specifically differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit.
Background technology
In conventional wireless transceiver design, 50 Ω single ended interfaces are widely used in radio frequency and intermediate-frequency circuit, and in modern transceiver design, differential interface is commonly used in high-frequency circuit to obtain better performance.Single-ended signal is a kind of unbalanced signal, is weighed by the difference between signal and permanent datum.If there is error source to be introduced into signal path, will have problems.Therefore, single-ended signal is easy to the impact by noise and electromagnetic coupled interference.Differential signal is made up of paired balanced signal, and these signal amplitudes are identical, and phase place is contrary.Difference between positive and negative balanced signal corresponds to composite differential signal.If error is introduced into differential system path, it is increased to identical amplitude in two balanced signals simultaneously.Therefore differential signal chain is not subject to the impact of Noise and Interference.This intrinsic error counteracting function can also provide better common-mode rejection ratio (CMRR) and Power Supply Rejection Ratio (PSSR).
In the actual design process of wireless product, need transfer problem when processing differential signal and single-ended signal device interconnection frequently, comprise impedance matching, common-mode voltage mates and the gain of complexity calculates.Excellent change-over circuit is helpful to optimized gain coupling, opposing noise jamming and prompt system performance, and current differential signal and single-ended signal conversion coupling typically use balun (balanced-unbalanced transformer) circuit and realize.Conventional balun circuit has:
(1) L-C balun:L-C balun design is an electric bridge in essence, is called " grid pattern " balun, comprises two electric capacity and two inductance in circuit, produces ± 90 ° of phase shifts respectively.
(2) microstrip line: microband printing Ba Lun has a variety of form, advantage is cheap, can be printed on pcb board or on microwave integrated circuit dielectric-slab; Microstrip balun size is quite large on the other hand, and especially in low frequency RF frequency range, little coupling line is commonly used in microwave frequency band bandwidth can reach 10-20%.
The simplest printing-type Ba Lun is coupling line Ba Lun, and also referred to as parallel lines Ba Lun, form with the quarter-wave microstrip line of centre frequency, bandwidth can reach a frequency multiplication, provides the coupling between sufficiently high microstrip line.
(3) balun integrated device: it is actual is exactly L-C balun circuit integration packaging in a device, goes to design special match circuit without engineer oneself.
(1) is modes maximum at present, (2) plants because the difference of the links such as pcb board material discreteness, processing easily causes impedance matching bad, the problems such as gain is poor, are difficult to accomplish excellent conversion coupling, generally use in the low-end product that performance requirement is not high.(3) plants cost performance, and comparatively (1) kind is poor, simultaneously not as discrete L-C balun circuit can require regulate targetedly neatly and accept or reject according to concrete application like that.
Utility model content
The utility model is in order to overcome the deficiencies in the prior art, on the basis not affecting differential signal port match conversion performance, the utility model proposes: differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit, general high frequency L-C balun match circuit is carried out to the bamboo product of simplification, decrease the quantity of device, reach the application requirement that wire sizes is further miniaturized, saved cost, enhanced reliability.
In order to solve above-mentioned technical problem, the basic technical scheme that the utility model proposes is: differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit, it is characterized in that, comprise pcb board, inductance and balance conducting wire, described inductance is one, described balanced conductive circuit is plotted on pcb board, overall in " work " font, two terminals in left side are electrically connected RF_N respectively, RF_P differential balance high frequency port, described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Terminals on the right side of described " work " font are electrically connected with the single-ended non-equilibrium port of RF.
The beneficial effects of the utility model are: at unmanned plane, in model plane flight control system, because of the limited space of aircraft carrier, the electricity of battery used is also limited, special requirement is had to the size of receiver and weight, require that the size of receiver and weight minimize as far as possible, and in HF link, transceiver ic, emission amplifier part, the connection of all kinds of radio-frequency devices such as reception amplifier part and antenna needs to carry out balun conversion often, the balun circuit of simplified design not only reduces the size of PCB, also save device cost, especially the transceiver of differential received and the power amplifier interface of single ended interfaces use our unique design can save 1 HF switch and around auxiliary circuit, not only size is little, the stability improving system is also had very great help.
Accompanying drawing explanation
Fig. 1 is conventional balun converting circuit structure schematic diagram.
The structural representation of differential signal port and a kind of embodiment of single-ended signal port translation circuit in Fig. 2 the utility model high-frequency circuit.
Fig. 3 is the application of differential signal port and a kind of embodiment of single-ended signal port translation circuit in utility model high-frequency circuit.
Embodiment
Be described further below with reference to accompanying drawing 1 to accompanying drawing 3 pairs of the utility model, but protection range of the present utility model should do not limited with this.
For convenience of description and understand the technical solution of the utility model, below illustrate that the orientation that the noun of locality used all is shown with accompanying drawing is as the criterion.
In the utility model high-frequency circuit, differential signal port and single-ended signal port translation circuit (are called for short circuit, see Fig. 2-3), it is characterized in that, comprise pcb board, inductance and balance conducting wire, described inductance is one, and described balanced conductive circuit is plotted on pcb board, overall in " work " font, two terminals in left side are electrically connected RF_N, RF_P differential balance high frequency port respectively, and described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Terminals on the right side of described " work " font are electrically connected with the single-ended non-equilibrium port of RF.
Embodiment 1
The present embodiment provides differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit, comprise pcb board, inductance and balance conducting wire, described inductance is one, described balanced conductive circuit is plotted on pcb board, overall in " work " font, two terminals in left side are electrically connected RF_N, RF_P differential balance high frequency port respectively, and described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Terminals on the right side of described " work " font are electrically connected with a single-ended non-equilibrium port of RF.
Embodiment 2
The present embodiment provides differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit, comprise pcb board, inductance and balance conducting wire, described inductance is one, described balanced conductive circuit is plotted on pcb board, overall in " work " font, two terminals in left side are electrically connected RF_N, RF_P differential balance high frequency port respectively, and described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Two terminals on the right side of described " work " font are electrically connected with single-ended non-equilibrium port PA-RX, single-ended non-equilibrium port PA-TX respectively.
The utility model circuit can be applicable to transponder chip and adds on radio frequency amplification chip, and Fig. 1 is conventional circuit design, is switched be connected by a HF switch between the differential interface of cc2500 and tx with rx two single ended interfaces of rfx2402c.Fig. 2-3 is the utility model circuit, and utilize the load LC of single inductance combined circuit board formation coupling and change-over circuit to realize the connection of differential interface, wire sizes is reduced greatly.Utilize the electric capacity that the distributed capacitance of PCB comes in alternative L-C, then coordinate the distributed inductance of PCB with 1 inductance, complete the simplification balun Match circuits of single inductance.From circuit in appearance, whole change-over circuit only has 1 inductance component instead of 4 usual LC devices.
The utility model circuit has carried out the unique design of simplification on the basis of the most frequently used L-C balun match circuit, do not affecting operating frequency, bandwidth, insertion loss, load power, under the prerequisite of the technical indicator such as impedance transformation ratio and common-mode rejection ratio, creatively transformation and bamboo product are carried out to conventional L-C balun match circuit, the device minimizing that the port translation circuit making this need often to use in high frequency wireless product is used, the corresponding area of PCB also diminishes, to at unmanned plane, require that size is little in model plane flight control system, the lightweight needs that wait are particularly useful.Meanwhile, decrease device, the stability that cost too increases product has not only been saved in the minimizing of the electrostatic sensitivity device such as HF switch especially in some applications.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
The utility model is not addressed part and is applicable to prior art.
Claims (2)
1. differential signal port and single-ended signal port translation circuit in a high-frequency circuit, it is characterized in that, comprise pcb board, inductance and balance conducting wire, described inductance is one, described balanced conductive circuit is plotted on pcb board, and overall in " work " font, two terminals in left side are electrically connected RF_N respectively, RF_P differential balance high frequency port, described inductance is positioned at the centre position of the middle vertical line " 1 " of " work " font; Terminals on the right side of described " work " font are electrically connected with the single-ended non-equilibrium port of RF.
2. differential signal port and single-ended signal port translation circuit in high-frequency circuit according to claim 1, is characterized in that, the single-ended non-equilibrium port of described RF is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520284637.8U CN204681336U (en) | 2015-05-05 | 2015-05-05 | Differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520284637.8U CN204681336U (en) | 2015-05-05 | 2015-05-05 | Differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204681336U true CN204681336U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520284637.8U Expired - Fee Related CN204681336U (en) | 2015-05-05 | 2015-05-05 | Differential signal port and single-ended signal port translation circuit in a kind of high-frequency circuit |
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| CN (1) | CN204681336U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004913A (en) * | 2017-06-06 | 2018-12-14 | 北京握奇智能科技有限公司 | A kind of intermediate frequency balun circuit |
| CN110519425A (en) * | 2019-08-20 | 2019-11-29 | 华勤通讯技术有限公司 | A kind of antenna assembly of terminal device |
-
2015
- 2015-05-05 CN CN201520284637.8U patent/CN204681336U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004913A (en) * | 2017-06-06 | 2018-12-14 | 北京握奇智能科技有限公司 | A kind of intermediate frequency balun circuit |
| CN110519425A (en) * | 2019-08-20 | 2019-11-29 | 华勤通讯技术有限公司 | A kind of antenna assembly of terminal device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180505 |