CN205723901U - A kind of L-band microstrip directional coupler circuit - Google Patents
A kind of L-band microstrip directional coupler circuit Download PDFInfo
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- CN205723901U CN205723901U CN201620381004.3U CN201620381004U CN205723901U CN 205723901 U CN205723901 U CN 205723901U CN 201620381004 U CN201620381004 U CN 201620381004U CN 205723901 U CN205723901 U CN 205723901U
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Abstract
This utility model relates to radio-frequency coupling technique in order to solve existing L-band braodband directional coupler and can not take into account volume, launch power and the problem of cost.This utility model provides a kind of L-band microstrip directional coupler circuit, including L-band signal input port, bonder, radio frequency output loading port, signal attenuation circuit, amplitude balancing circuit, rf power signal coupled output ports and bonder isolated port, described bonder respectively with L-band signal input port, radio frequency output loading port, signal attenuation circuit and bonder isolated port connect, described attenuator circuit is connected with amplitude balancing circuit, amplitude balancing circuit is connected with rf power signal coupled output ports, described L-band signal input port, radio frequency output loading port, rf power signal coupled output ports and bonder isolated port ground connection respectively.This utility model is applicable to L-band radio frequency products.
Description
Technical field
This utility model relates to radio-frequency coupling technique, particularly to the coupler circuit of a kind of L-band.
Background technology
21st century RF application develops rapidly, and along with the fast development of L-band terrestrial digital communication Yu satellite communication, more comes
The most L-band radio frequency applications are developed.At the emitting portion end of radio frequency applications interiors of products, generally require high-power,
The directional coupler of high flat degree is used for detecting circuit.And detecting circuit is extensively applied to close-loop power control, vswr protection
Etc. in important circuit.Along with the small form factor requirements of electronic product exploitation increasingly highlights, and to power capacity and bandwidth of operation
Requirement the most increasing, the exploitation of radio frequency products has increasing need for a kind of high-power, broadband, high flat degree micro-strip is fixed
To coupler circuit.
Main braodband directional coupler uses the mode of more piece coupling, it is achieved wide band power coupling function,
Can guarantee that its performance indications meet customization project demand simultaneously.This bonder limits due to its structure, often has by big merit
The volume of rate ability can be bigger, and volume little cannot be by high-power.Wideband high-power directional coupler the most on the market
Device has certain price, virtually adds project development cost.
Utility model content
The purpose of this utility model be in order to solve existing L-band braodband directional coupler can not take into account volume, launch power and
The problem of cost.
For reaching above-mentioned purpose, this utility model provides a kind of L-band microstrip directional coupler circuit, defeated including L-band signal
The coupling of inbound port, bonder, radio frequency output loading port, signal attenuation circuit, amplitude balancing circuit, rf power signal is defeated
Go out port and bonder isolated port, described bonder respectively with L-band signal input port, radio frequency output loading port, letter
Number attenuator circuit and bonder isolated port connect, and described attenuator circuit is connected with amplitude balancing circuit, amplitude balancing circuit with penetrate
Frequently power signal coupled output ports connects, and described L-band signal input port, radio frequency output loading port, radio-frequency power are believed
Number coupled output ports and bonder isolated port ground connection respectively.
Specifically, described signal attenuation circuit includes the 3rd resistance, the 4th resistance and the 5th resistance, one end of described 5th resistance
Being connected with one end of the 4th resistance, one end of the other end and the 3rd resistance connects, the other end of the 3rd resistance and the 4th resistance another
One end node that ground connection, the 5th resistance and the 4th resistance connect respectively is connected with bonder, and the 5th resistance and the 3rd resistance connect
Node is connected with amplitude balancing circuit.
Specifically, described signal attenuation circuit includes the first resistance, the second resistance, inductance and electric capacity, and described inductance is with electric capacity also
After connection connects, one end is connected with rf power signal coupled output ports, and the other end is connected with signal attenuation circuit, described electric capacity
Also one end with the first resistance, one end is connected, the other end ground connection of the first resistance, the other end of electric capacity also with one end of the second resistance
Connect, the other end ground connection of the second resistance.
Preferably, the frequency of described L-band is 1300MHZ to 1800MHZ.
The beneficial effects of the utility model are: this circuit uses the structure that microstrip coupled mode is combined with lumped-parameter element, by body
Amassing within having accomplished 10mm × 8mm, survey maximum in 1300MHz 1800MHz working band can be continuous by 300W simultaneously
Ripple radio-frequency power, has a directivity of more than-18dBc simultaneously, inband flatness≤± 0.3dB, in-band insertion loss≤0.1dB,
Index is completely suitable for the radio frequency products exploitation of this frequency range, is superior to current most of same type circuit on volume with power capacity.
Simultaneously as this circuit can directly be accomplished on PCB, save the cost buying coupled outside device.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of a kind of L-band microstrip directional coupler circuit of embodiment；
Figure is labeled as: Term1:L band signal input port, Term2: radio frequency output loading port, Term3: radio frequency
Power signal coupled output ports, Term4: bonder isolated port, the R1: the first resistance, the R2: the second resistance, the R3: the three electricity
Resistance, the R4: the four resistance, the R5: the five resistance, C1: electric capacity, L1: inductance, CP: bonder.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.
This utility model is to solve existing L-band braodband directional coupler to take into account volume, launch power and the problem of cost,
There is provided a kind of L-band microstrip directional coupler circuit, including L-band signal input port, bonder, radio frequency output loading end
Mouth, signal attenuation circuit, amplitude balancing circuit, rf power signal coupled output ports and bonder isolated port, described coupling
Clutch is connected with L-band signal input port, radio frequency output loading port, signal attenuation circuit and bonder isolated port respectively,
Described attenuator circuit is connected with amplitude balancing circuit, and amplitude balancing circuit is connected with rf power signal coupled output ports, described
L-band signal input port, radio frequency output loading port, rf power signal coupled output ports and bonder isolated port are divided
Other ground connection.
Embodiment
Circuit of the present utility model is mainly solving the technical problems that how in broadband, small size, these several contradictions high-power
Requirement is balanced, thus it is wider to obtain a kind of bandwidth of operation, there is smaller volume simultaneously but can pass through more powerful micro-
Band directional coupler circuit.After solving these problems, in our radio frequency products is developed, we can save more
Space, meets small form factor requirements the most harsh in electronic product exploitation.Cost is accomplished lower, with satisfied high-volume simultaneously
The cost control requirement produced.
As it is shown in figure 1, the circuit of a kind of L-band microstrip directional coupler circuit of the present utility model, defeated including L-band signal
Inbound port Term1, bonder CP, radio frequency output loading port Term2, signal attenuation circuit, amplitude balancing circuit, radio frequency
Power signal coupled output ports Term3 and bonder isolated port Term4.Wherein, signal attenuation circuit includes the 3rd resistance
R3, the 4th resistance R4 and the 5th resistance R5, described one end of 5th resistance R5 is connected with one end of the 4th resistance R4, another
End is connected with one end of the 3rd resistance R3, the other end of the 3rd resistance R3 and the other end of the 4th resistance R4 ground connection respectively, and the 5th
The node that resistance R5 and the 4th resistance R4 connect is connected with bonder, the node of the 5th resistance R5 and the 3rd resistance R3 connection and
Amplitude balancing circuit connects.Signal attenuation circuit includes the first resistance R1, the second resistance R2, inductance L1 and electric capacity C1, described
Inductance L1 and electric capacity C1 is connected in parallel rear one end and is connected with rf power signal coupled output ports Term3, the other end and signal
Attenuator circuit connects, and also one end with the first resistance R1, one end of described electric capacity C1 is connected, the other end ground connection of the first resistance R1,
The other end of electric capacity C1 also one end with the second resistance R2 is connected, the other end ground connection of the second resistance R2.
This circuit operation principle is after the signal in L-band 1300MHz 1800MHz working band passes through this coupling circuit, the most greatly
The straight-through transmission of part signal is to radio frequency output port, and fraction power passes through coupling port through LRC amplitude balancing circuit and the letter that declines
Number powered down road, exports from rf power signal coupled output ports Term3.The actual degree of coupling can be adjusted by attenuator circuit.
The operation principle of this circuit is as follows: signal is transferred to penetrate via bonder CP by L-band signal input port Term1
Frequently output loading port Term2.Sub-fraction rf power signal is through bonder CP when, from the coupling of bonder CP
Close the fixing π type attenuator circuit that port forms via the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, then through inductance
L1, electric capacity C1, the first resistance R1 and the amplitude balancing circuit of the second resistance R2 composition, arrive rf power signal coupling output
Port Term3, Term4 are bonder isolated port.
This actual degree of coupling of coupling circuit can be decayed by the π type of the 3rd resistance R3, the 4th resistance R4 and the 5th resistance R5 composition
Device is adjusted.Directivity≤-18dBc in actual measurement band, in band, straight-through power capacity is maximum up to 300W continuous wave, smooth in band
Degree≤± 0.3dB.Meet overwhelming majority radio frequency products exploitation demand in 1300MHz-1800MHz band.
Claims (4)
1. a L-band microstrip directional coupler circuit, it is characterised in that include L-band signal input port, bonder,
Radio frequency output loading port, signal attenuation circuit, amplitude balancing circuit, rf power signal coupled output ports and bonder every
From port, described bonder respectively with L-band signal input port, radio frequency output loading port, signal attenuation circuit and couple
Device isolated port connects, and described attenuator circuit is connected with amplitude balancing circuit, and amplitude balancing circuit couples defeated with rf power signal
Go out port connect, described L-band signal input port, radio frequency output loading port, rf power signal coupled output ports and
Bonder isolated port ground connection respectively.
2. a kind of L-band microstrip directional coupler circuit as claimed in claim 1, it is characterised in that described signal attenuation electricity
Road includes that the 3rd resistance, the 4th resistance and the 5th resistance, described one end of 5th resistance are connected with one end of the 4th resistance, another
End is connected with one end of the 3rd resistance, and the other end of the other end of the 3rd resistance and the 4th resistance distinguishes ground connection, the 5th resistance and the
The node that four resistance connect is connected with bonder, and the node that the 5th resistance and the 3rd resistance connect is connected with amplitude balancing circuit.
3. a kind of L-band microstrip directional coupler circuit as claimed in claim 1 or 2, it is characterised in that described signal declines
Powered down road includes that the first resistance, the second resistance, inductance and electric capacity, described inductance and electric capacity are connected in parallel rear one end and radio-frequency power
Signal coupled output ports connects, and the other end is connected with signal attenuation circuit, one end of described electric capacity also with one end of the first resistance
Connecting, the other end ground connection of the first resistance, the other end of electric capacity also one end with the second resistance is connected, the other end of the second resistance
Ground connection.
4. a kind of L-band microstrip directional coupler circuit as claimed in claim 3, it is characterised in that the frequency of described L-band
Rate is 1300MHZ to 1800MHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620381004.3U CN205723901U (en) | 2016-04-29 | 2016-04-29 | A kind of L-band microstrip directional coupler circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620381004.3U CN205723901U (en) | 2016-04-29 | 2016-04-29 | A kind of L-band microstrip directional coupler circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205723901U true CN205723901U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620381004.3U Active CN205723901U (en) | 2016-04-29 | 2016-04-29 | A kind of L-band microstrip directional coupler circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865265A (en) * | 2022-06-14 | 2022-08-05 | 江南大学 | Broadband low-loss directional coupler and frequency modulation transmitter system |
| CN115603022A (en) * | 2022-12-01 | 2023-01-13 | 成都市四度空间科技有限公司（Cn） | UHF frequency band ultra-wideband high-power radio frequency power coupler |
-
2016
- 2016-04-29 CN CN201620381004.3U patent/CN205723901U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865265A (en) * | 2022-06-14 | 2022-08-05 | 江南大学 | Broadband low-loss directional coupler and frequency modulation transmitter system |
| CN115603022A (en) * | 2022-12-01 | 2023-01-13 | 成都市四度空间科技有限公司（Cn） | UHF frequency band ultra-wideband high-power radio frequency power coupler |
| CN115603022B (en) * | 2022-12-01 | 2023-03-14 | 成都市四度空间科技有限公司 | UHF frequency band ultra-wideband high-power radio frequency power coupler |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |