CN204065231U - A kind of microwave power detection circuit - Google Patents
A kind of microwave power detection circuit Download PDFInfo
- Publication number
- CN204065231U CN204065231U CN201420312314.0U CN201420312314U CN204065231U CN 204065231 U CN204065231 U CN 204065231U CN 201420312314 U CN201420312314 U CN 201420312314U CN 204065231 U CN204065231 U CN 204065231U
- Authority
- CN
- China
- Prior art keywords
- network
- shape
- power
- attenuation
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of microwave power detection circuit.This circuit utilizes in output matching network one section of microstrip line and coupling capacitance and π shape LC network to constitute a coupling power network.One or multiple π shape LC combination of network can realize different phase shifts.Such structural design avoids and uses independently directional coupler, has saved cost.Simultaneously for the microwave circuit lower than 1GHz frequency range, physical space can be reduced greatly, save radio frequency sheet material, realize the layout of densification.Attenuation network can adopt π shape or L shape resistance decrement network flexibly, and the change according to resistance can choose different attenuation ranges, is applicable to different microwave power detection.
Description
Technical field
The utility model relates to microwave testing circuit field, specifically a kind of microwave power detection circuit.
Background technology
The progressive high speed development promoting radio-frequency technique of science and technology, the scope of radio frequency applications is also more and more wider, the more and more miniaturization of various radio-frequency enabled modules.At radio-frequency power amplification sector, the reliability service of detection to whole circuit of incidence reflection power has vital effect.Conventional detection means is by connecting an independently directional coupler or adopt the form of microstrip lines, but in the frequency range lower than 1GHz, because wavelength is longer, adopt conventional detection means often to need larger physical space, waste radio frequency sheet material, cost is relatively high.
Utility model content
The purpose of this utility model is to provide a kind of microwave power detection circuit, to solve prior art Problems existing.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of microwave power detection circuit, is characterized in that: include input matching network, power amplifier tube, output matching network, coupling power network, two attenuation networks, two detection networks;
Described input matching network input end is connected with power input ports, and input matching network output terminal is connected with power amplifier tube input end, power amplifier tube output terminal access output matching network;
Described output matching network comprises LC network, microstrip line, and described power amplifier tube output terminal is connected with LC network input, and LC network output is connected with microstrip line one end, and the microstrip line other end is connected with power stage port;
In two detection networks and two detection networks, first detection network input is connected with incident power detection port, and first detection network output is connected with first attenuation network input end, first attenuation network output terminal access power coupling network;
Described coupling power network comprises at least one π shape LC network, two coupling capacitances, π shape LC network input is connected with first attenuation network output terminal, π shape LC network output is connected with second attenuation network input end, in two coupling capacitances, one of them coupling capacitance one end is connected to one end that microstrip line is connected with LC network, the other end is connected to first attenuation network output terminal, and another coupling capacitance one end is connected to one end that microstrip line is connected with power stage port, the other end is connected to second attenuation network input end;
Second attenuation network output terminal is connected with second detection network input, and second detection network output is connected with reflected power sensor port.
Described a kind of microwave power detection circuit, it is characterized in that: in coupling power network, when π shape LC network has multiple, multiple π shape LC network is followed in series to form cascaded structure, cascaded structure one end is connected with first attenuation network output terminal, and the cascaded structure other end is connected with second attenuation network input end.
Described a kind of microwave power detection circuit, is characterized in that: in coupling power network, two coupling capacitance values are all less than 1pF.
Described a kind of microwave power detection circuit, is characterized in that: microstrip line length be microwave in media as well wavelength 1/4th.
Described a kind of microwave power detection circuit, is characterized in that: the shape of microstrip line adopts the form of straight line or sweep.
Described a kind of microwave power detection circuit, is characterized in that: each π shape LC network packet contains an inductance and two electric capacity, the equal ground connection in one end of two electric capacity.
Described a kind of microwave power detection circuit, is characterized in that: two attenuation networks all adopt 50 Ω resistors match attenuators, adopts π shape or L shape structural design.
Described a kind of microwave power detection circuit, is characterized in that: two detecting circuits all adopt detector diode to carry out sample of signal.
The utility model has the advantages that:
Because this circuit have employed a kind of directional coupling structure of uniqueness, utilize in output matching network one section of microstrip line to constitute a coupling network in conjunction with capacitor and inductor, this avoid and use independent directional coupler, saved cost.Utilize one group or many groups of (maximum 3 groups) π shape LC real-time performance phase shift functions simultaneously, save physical space greatly like this, especially in the frequency range of below 1GHz, can compact structure be formed, this circuit can effectively distinguish incidence reflection power, and cost is lower.
Attenuation network can adopt π shape or L shape resistance decrement network flexibly, and the change according to resistance can choose different attenuation ranges, can detect in real time like this, have good versatility to the microwave amplifiercation circuit of different capacity.
Accompanying drawing explanation
Fig. 1 is the utility model circuit structure block diagram.
Embodiment
Shown in Figure 1, a kind of microwave power detection circuit, includes input matching network 1, power amplifier tube 2, output matching network 3, coupling power network 4, two attenuation networks 5,7, two detection networks 6,8;
Input matching network 1 input end is connected with power input ports IN, and input matching network 1 output terminal is connected with power amplifier tube 2 input end, power amplifier tube 2 output terminal access output matching network 3;
Output matching network 3 comprises LC network, microstrip line 41, and power amplifier tube 2 output terminal is connected with LC network input, and LC network output is connected with microstrip line 41 one end, and microstrip line 41 other end is connected with power stage port OUT;
In two detection networks and two detection networks, first detection network 8 input end is connected with incident power detection port Port1, first detection network 8 output terminal is connected with first attenuation network 7 input end, first attenuation network 7 output terminal access power coupling network 4;
Coupling power network 4 comprises at least one π shape LC network 42, two coupling capacitance C1, C2, π shape LC network 42 input end is connected with first attenuation network 7 output terminal, π shape LC network 42 output terminal is connected with second attenuation network 5 input end, in two coupling capacitances, one of them coupling capacitance C1 one end is connected to one end that microstrip line 41 is connected with LC network, the other end is connected to first attenuation network 7 output terminal, another coupling capacitance C2 one end is connected to one end that microstrip line 41 is connected with power stage port OUT, the other end is connected to second attenuation network 5 input end,
Second attenuation network 5 output terminal is connected with second detection network 6 input end, and second detection network 6 output terminal is connected with reflected power sensor port Port2.
In coupling power network 4, when π shape LC network 42 has multiple, multiple π shape LC network is followed in series to form cascaded structure, and cascaded structure one end is connected with first attenuation network 7 output terminal, and the cascaded structure other end is connected with second attenuation network 5 input end.
In coupling power network 4, two coupling capacitance C1, C2 value are all less than 1pF.
Microstrip line 41 length be microwave in media as well wavelength 1/4th.
The shape of microstrip line 41 can adopt straight line, also can adopt the form of sweep.
Each π shape LC network 42 comprises an inductance L 1 and two electric capacity C3, C4, the equal ground connection in one end of two electric capacity C3, C4.
Two attenuation networks 5,7 all adopt 50 Ω resistors match attenuators, can adopt π shape or L shape structural design.
Two detecting circuits 6,8 all adopt detector diode to carry out sample of signal.
In the utility model, microstrip line 41 is a part for output matching network, is also a part for coupling power network, and the length of this part microstrip line is 1/4 λ (λ is microwave wavelength in media as well).The shape of this part microstrip line can adopt straight line or sweep.When microwave frequency band is lower than 1GHz, can adopts the form that continuous U-shaped is bending, can save physical space greatly like this, adopt U-bend bent, what turn employing is the circular sliding slopes consistent with 50 Ω micro belt line widths.
In the utility model, coupling capacitance C1 C2 adopts identical value, and the value generally chosen is less than 1pF, and when the microwave power of required detection is greater than 100W, selected value is generally less than 0.5pF.Microstrip line 41 length between C1 C2 be microwave in media as well wavelength 1/4th.This microstrip line is a part for microstrip line in output matching network.
In the utility model, the π shape LC network 42 in coupling power network 4 can have one group also can have many groups.By choosing different LC values, realize different phase shifts.Also π shape LC network 42 can be adopted in conjunction with the form of microstrip line to realize phase shifts.The mode of concrete employing will arrange according to space structure.Choose suitable LC value, each π shape LC network can realize the phase shifts of 90 degree, and three identical structures connect successively, can realize the phase shifts of 270 degree.
In the utility model, attenuation network 5,7 all adopts 50 Ω resistors match attenuators, has identical version, can adopt π shape or the design of L shape resistance decrement network structure, choose different resistance values, realize decay in various degree.
In the utility model, detecting circuit 6,8 has identical version, adopts detector diode to carry out sample of signal.
Port1 port is incident power detection port, and Port2 port is reflected power sensor port.Choose suitable C1 C2 and π shape LC network 42 can form good isolation and directivity.
Claims (8)
1. a microwave power detection circuit, is characterized in that: include input matching network, power amplifier tube, output matching network, coupling power network, two attenuation networks, two detection networks;
Described input matching network input end is connected with power input ports, and input matching network output terminal is connected with power amplifier tube input end, power amplifier tube output terminal access output matching network;
Described output matching network comprises LC network, microstrip line, and described power amplifier tube output terminal is connected with LC network input, and LC network output is connected with microstrip line one end, and the microstrip line other end is connected with power stage port;
In two detection networks and two detection networks, first detection network input is connected with incident power detection port, and first detection network output is connected with first attenuation network input end, first attenuation network output terminal access power coupling network;
Described coupling power network comprises at least one π shape LC network, two coupling capacitances, π shape LC network input is connected with first attenuation network output terminal, π shape LC network output is connected with second attenuation network input end, in two coupling capacitances, one of them coupling capacitance one end is connected to one end that microstrip line is connected with LC network, the other end is connected to first attenuation network output terminal, and another coupling capacitance one end is connected to one end that microstrip line is connected with power stage port, the other end is connected to second attenuation network input end;
Second attenuation network output terminal is connected with second detection network input, and second detection network output is connected with reflected power sensor port.
2. a kind of microwave power detection circuit according to claim 1, it is characterized in that: in coupling power network, when π shape LC network has multiple, multiple π shape LC network is followed in series to form cascaded structure, cascaded structure one end is connected with first attenuation network output terminal, and the cascaded structure other end is connected with second attenuation network input end.
3. a kind of microwave power detection circuit according to claim 1, is characterized in that: in coupling power network, and two coupling capacitance values are all less than 1pF.
4. a kind of microwave power detection circuit according to claim 1, is characterized in that: microstrip line length be microwave in media as well wavelength 1/4th.
5. a kind of microwave power detection circuit according to claim 1, is characterized in that: the shape of microstrip line adopts the form of straight line or sweep.
6. a kind of microwave power detection circuit according to claim 1, is characterized in that: each π shape LC network packet contains an inductance and two electric capacity, the equal ground connection in one end of two electric capacity.
7. a kind of microwave power detection circuit according to claim 1, is characterized in that: two attenuation networks all adopt 50 Ω resistors match attenuators, adopts π shape or L shape structural design.
8. a kind of microwave power detection circuit according to claim 1, is characterized in that: two detecting circuits all adopt detector diode to carry out sample of signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312314.0U CN204065231U (en) | 2014-06-12 | 2014-06-12 | A kind of microwave power detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312314.0U CN204065231U (en) | 2014-06-12 | 2014-06-12 | A kind of microwave power detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204065231U true CN204065231U (en) | 2014-12-31 |
Family
ID=52206715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420312314.0U Active CN204065231U (en) | 2014-06-12 | 2014-06-12 | A kind of microwave power detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204065231U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831360A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of rf power measurement device |
| CN111697931A (en) * | 2020-05-26 | 2020-09-22 | 中国电子科技集团公司第五十五研究所 | Pre-matched compact coupling detection circuit chip integrated with GaN power amplifier |
| CN113381701A (en) * | 2021-06-30 | 2021-09-10 | 上海航天测控通信研究所 | Microwave solid-state power amplifier |
-
2014
- 2014-06-12 CN CN201420312314.0U patent/CN204065231U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831360A (en) * | 2017-12-08 | 2018-03-23 | 成都前锋电子仪器有限责任公司 | A kind of rf power measurement device |
| CN107831360B (en) * | 2017-12-08 | 2024-01-30 | 成都前锋电子仪器有限责任公司 | Radio frequency power measuring device |
| CN111697931A (en) * | 2020-05-26 | 2020-09-22 | 中国电子科技集团公司第五十五研究所 | Pre-matched compact coupling detection circuit chip integrated with GaN power amplifier |
| CN111697931B (en) * | 2020-05-26 | 2022-07-22 | 中国电子科技集团公司第五十五研究所 | Pre-matching compact coupling detection circuit chip integrated with GaN power amplifier |
| CN113381701A (en) * | 2021-06-30 | 2021-09-10 | 上海航天测控通信研究所 | Microwave solid-state power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109616723A (en) | A kind of high-precision phase shifter applied to 5G millimeter wave base station | |
| CN204065231U (en) | A kind of microwave power detection circuit | |
| CN103280621B (en) | Five decile power splitters | |
| WO2017080263A1 (en) | Ultra-wideband digital phase shifter | |
| CN103928732A (en) | Micro-strip line absorption band-pass filter | |
| CN101938022A (en) | Adjustable band elimination filter | |
| CN103618528A (en) | Microwave single-pole multi-throw switch | |
| CN105071000A (en) | Broadband microwave six-port structure | |
| CN103760415B (en) | Strong-flow compact type circular accelerator tuning loop phase detection method | |
| CN100435409C (en) | Super wide band microstrip filter | |
| CN104617893B (en) | Multiband RF power amplifier | |
| CN101692512B (en) | Ultra wide band bandpass filter based on ground defective grounding structure | |
| CN206412449U (en) | A kind of ultra wide band Wilkinson power splitters loaded based on parasitic element | |
| CN203690451U (en) | Duplexer | |
| CN205122733U (en) | Ultra wide band digital phase shifter | |
| CN203788253U (en) | Microwave single-pole multi-throw switch | |
| CN104201445B (en) | A kind of active how orthogonal inverse filter of outer load of microwave and millimeter wave | |
| CN102868010B (en) | Bagley Polygon power distributor of coupled micro-strip line | |
| CN203707303U (en) | Novel ultra-wideband 90-degree integrated coupler | |
| CN204536434U (en) | A kind of reflectometer apparatus | |
| CN105337012A (en) | Double-frequency coupler based on step-type impedance transformer | |
| KR20100078589A (en) | Power divider | |
| CN204538167U (en) | A kind of circulator device | |
| CN203984365U (en) | A kind of adjustable printed panel transformer | |
| CN105006622A (en) | Microwave power divider |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |