CN201497775U - Microwave power-detecting device - Google Patents
Microwave power-detecting device Download PDFInfo
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- CN201497775U CN201497775U CN2009202358773U CN200920235877U CN201497775U CN 201497775 U CN201497775 U CN 201497775U CN 2009202358773 U CN2009202358773 U CN 2009202358773U CN 200920235877 U CN200920235877 U CN 200920235877U CN 201497775 U CN201497775 U CN 201497775U
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Abstract
The utility model discloses a microwave power-detecting device which is a micro electronic mechanical microwave loss compensation type microwave power-detecting device which can simultaneously detect DC power and microwave power with identical power sensors. The device comprises three identical power sensors, a power distributor (16), a difference amplifier (17), an automatic gain controller (18); the three complete same power sensors are a first power sensor (a), a second power sensor (b) and a third power sensor (c); and the input end of the power distributor (7) is connected with microwave power to be detected, the first output end of the power distributor (8) is connected with a coplanar wave guide transmission line (1) of the second power sensor (b), the second output end of the power distributor (9) is connected with the coplanar wave guide transmission line (1) of the third power sensor (c), and the DC power, the amplitude of which is as the same as the amplitudes of a first microwave power to be detected P1 and a second microwave power to be detected P2, is connected with the coplanar wave guide transmission line (1) of the first power sensor (a).
Description
Technical field
The utility model proposes microwave power detection device, belong to the technical field of microelectromechanical systems based on microelectromechanical systems (MEMS) technology.
Background technology
In research of microwave technology, microwave power is an important parameter that characterizes the microwave signal feature.In generation, the transmission of microwave signal and receive in the research of each link, the detection of microwave power is absolutely necessary.Modal microwave power detector is based on the microwave power detector of thermoelectric transfer principle, it changes into heat to microwave signal by pull-up resistor, and then utilizes the Seebeck effect of thermoelectric pile that the DC voltage that this thermal cross over becomes to be directly proportional with microwave power to be measured is exported.The shortcoming of traditional microwave power sensor is that DC voltage by output when calculating microwave power to be measured, do not consider the minimizing for the treatment of power scale that lossy microwave causes, thus the degree of accuracy that influence detects.Over nearly more than 20 years, along with the develop rapidly of MEMS technology, MEMS technology and silicon (Si) technology or gallium arsenide (GaAs) thus technology is compatible mutually to make microwave power detection to the system-level possibility that develops into, the present invention is the pick-up unit based on this principle of work.
Summary of the invention
Technical matters: the purpose of this utility model provides a kind of micro-electromechanical microwave loss compensating microwave power detector based on the MEMS technology, when utilizing identical power sensor to detect DC power and microwave power at the same time, detect its difference and compensate to realize lossy microwave, thus the accuracy of raising microwave power detection.
Technical scheme: this device of micro-electromechanical microwave loss compensating microwave power detector of the present utility model comprises three identical power sensors and is aided with power divider, differential amplifier, automatic gain controller; Three identical power sensors are first power sensor, second power sensor, the 3rd power sensor; Power divider input end reception micrometer wave power, on the coplanar waveguide transmission line of the power divider first output termination second power sensor, on the coplanar waveguide transmission line of the power divider second output termination the 3rd power sensor, with the first microwave power P to be measured
1With the second microwave power P to be measured
2The DC power that amplitude is identical is received on the coplanar waveguide transmission line of first power sensor; The press welding block of first power sensor is connected to the differential amplifier first input end, the press welding block of second power sensor is connected to differential amplifier second input end, the differential amplifier output terminal is connected to the AGC control end of automatic gain controller, the press welding block of the 3rd power sensor connects the AGC input end of automatic gain controller, and electric potential difference is by the AGC output terminal output of automatic gain controller.The GaAs substrate of described power sensor is provided with the gallium aluminium arsenic film, centre position at gallium aluminium arsenic film subscript face is provided with thermoelectric pile, position, both sides at gallium aluminium arsenic film subscript face is respectively equipped with coplanar waveguide transmission line and press welding block, is provided with tantalum nitride resistance on the next door of coplanar waveguide transmission line.
Microwave signal to be measured is divided into two by power divider and obtains two identical microwave signals to be measured, i.e. first microwave power to be measured and second microwave power to be measured, first microwave power to be measured is connected to the coplanar waveguide transmission line of second power sensor, second microwave power to be measured is connected to the coplanar waveguide transmission line of the 3rd power sensor, and be connected to the coplanar waveguide transmission line of first power sensor with first microwave power to be measured and the equal-sized DC power of second microwave power to be measured, the press welding block of first power sensor is connected to the differential amplifier first input end, the press welding block of second power sensor is connected to differential amplifier second input end, the output terminal of differential amplifier is connected to the control end of automatic gain controller, the press welding block of the 3rd power sensor connects the input end of automatic gain controller, and electric potential difference is by the output terminal output of automatic gain controller;
The DC power and first microwave power to be measured are by first power sensor of the microwave power loss test section of device, second power sensor and differential amplifier detect the loss power of first microwave power to be measured, because first microwave power to be measured and second microwave power to be measured are identical, loss is also identical, bring in the loss power of compensation second microwave power to be measured then by the control of AGC, and the compensation microwave power detection part of lossy microwave by device, the 3rd power sensor, automatic gain controller detects the power of microwave signal to be measured accurately.
Beneficial effect: compare with existing microwave power detector, the microwave power detection device of this novel technology based on MEMS has following significant advantage:
1, this structure is made up of microwave power loss detection and the compensation microwave power detection two parts of lossy microwave, thereby has effectively compensated the power of lossy microwave, has greatly improved the degree of accuracy of microwave power detection;
2, this structural manufacturing process is simple, is convenient to integrated;
3, this structure is amplified output with feeble signal, helps the processing of follow-up interface circuit.
And this structure is based on the MEMS technology, has the principal advantages of MEMS, as in light weight, low in energy consumption etc.These a series of advantages are that traditional microwave power detector is incomparable, so it has excellent research and using value.
Description of drawings
Fig. 1 is the schematic diagram of microwave power detection device,
Fig. 2 a is the structural representation of single microwave power detector,
Fig. 2 b is the A-A face sectional structure synoptic diagram of Fig. 2 a,
Fig. 2 c is the structural representation of whole power sensor structure,
Fig. 3 is the circuit connection diagram of microwave power detection device,
Fig. 4 is the graph of a relation between output voltage and the microwave input power,
Comprise among the figure: coplanar waveguide transmission line 1, tantalum nitride (TaN) resistance 2, thermoelectric pile 3, press welding block 4, gallium aluminium arsenic film 5, GaAs substrate 6, power divider input end 7, power divider first output terminal 8, power divider second output terminal 9, differential amplifier first input end 10, differential amplifier second input end 11, differential amplifier output terminal 12, AGC control end 13, AGC input end 14, AGC output terminal 15, power divider 16, differential amplifier 17, automatic gain controller (AGC) 18.
Embodiment
Microwave power detection device of the present utility model utilizes three identical power sensors and is aided with power divider, differential amplifier, automatic gain controller (AGC):
Microwave signal to be measured is added to power divider input end 7, and at its power divider first output terminal 8, power divider second output terminal 9 places have produced two identical microwave signals to be measured, promptly treat the first micrometer wave power P
1With the second microwave power P to be measured
2
Microwave power detector is made up of three identical power sensor a, power sensor b and power sensor c.Two input ends of differential amplifier are received in the output of power sensor a and power sensor b, then the output of differential amplifier are received the control end of AGC, thus the microwave power loss test section of component devices.The input end of AGC is received in the output of power sensor c, the compensation microwave power detection part of the lossy microwave of component devices.
Will with microwave power P to be measured
1, P
2The DC power of equal-wattage size is received the coplanar waveguide transmission line of power sensor a, with microwave power P to be measured
1Receive the coplanar waveguide transmission line of power sensor b.Microwave power P to be measured
2Receive the coplanar waveguide transmission line of power sensor c.
DC power and microwave power P to be measured
1Be input to the microwave power loss test section of device, because both watt level is identical, but there is not lossy microwave in DC power, just can detect both difference, microwave power P promptly to be measured by differential amplifier
1The power of loss, and the output of differential amplifier is received the control end of AGC.Microwave power P to be measured
2C exports to AGC by power sensor, and the control end of AGC compensates microwave power P to be measured
2Because the loss power that microwave frequency causes, because microwave power P to be measured
1, P
2Identical, the microwave power detector that passes through is also identical, so the microwave power loss is also identical, thereby realizes the accurate detection of microwave power.
The microwave power detection device is the compensation microwave power detection device of a kind of lossy microwave, and specific embodiments is as follows:
This device utilizes three identical power sensors (power sensor a, power sensor b, power sensor c) and is aided with power divider 16, differential amplifier 17, automatic gain controller 18:
Power sensor is made up of power sensor a, power sensor b, power sensor c, and three's structure is identical, and they all are made up of coplanar waveguide transmission line 1, tantalum nitride resistance 2, thermoelectric pile 3 and press welding block 4 respectively.
The port 1 that microwave signal to be measured is input to power divider is divided into two and has produced two identical signals, has promptly formed microwave power 1 (P to be measured at port 28
1), formed microwave power 2 (P to be measured at port 39
2).P
1Receive on the coplanar waveguide transmission line 1 of power sensor b P
2Receive on the coplanar waveguide transmission line 1 of power sensor c.And and P
1, P
2The DC power that amplitude is identical is received on the coplanar waveguide transmission line 1 of power sensor a.The electric potential difference that DC power produces by power sensor a inputs to the input port 1 of differential amplifier, microwave power P to be measured
1Input to the input port 2 11 of differential amplifier by the electric potential difference of power sensor b generation.Microwave power P to be measured
1Owing to microwave frequency exists lossy microwave, and there is not lossy microwave in DC power, so both difference inputs to the control end 13 of automatic gain controller by the output terminal 12 of differential amplifier, because power P to be measured
1, P
2Identical, so both lossy microwaves are also identical.Microwave power P to be measured
2The electric potential difference that produces by power sensor c inputs to the input end 14 of AGC, so compensates microwave power P to be measured by AGC control end 13
2Loss power, and output terminal 15 output potentials by AGC are poor.The detection of microwave power has improved the degree of accuracy that detects by behind the loss balancing of AGC control end 13.
Distinguish whether to be the standard of this structure as follows:
This detection microwave power device is when utilizing identical power sensor to detect DC power and microwave power at the same time, detect its difference to realize the microwave power detection device of lossy microwave compensation, form by microwave power loss detection and the compensation microwave power detection two parts of lossy microwave.Be DC power and microwave power P to be measured
1Microwave power loss test section (power sensor a, power sensor b and differential amplifier) output microwave power P to be measured by device
1Loss power because microwave power P to be measured
1, P
2Identical, so loss is also identical, brings in compensation microwave power P to be measured by the control of AGC then
2Power attenuation, and detect the power of microwave signal to be measured accurately by the compensation microwave power detection of the lossy microwave of device part (power sensor c, AGC).
The structure that satisfies above condition promptly is considered as microelectron-mechanical microwave power detection device of the present invention.
Claims (2)
1. a microwave power detection device is characterized in that this device comprises three identical power sensors and is aided with power divider (16), differential amplifier (17), automatic gain controller (18); Three identical power sensors are first power sensor (a), second power sensor (b), the 3rd power sensor (c); Power divider input end (7) reception micrometer wave power, power divider first output terminal (8) connects on the coplanar waveguide transmission line (1) of second power sensor (b), power divider second output terminal (9) connects on the coplanar waveguide transmission line (1) of the 3rd power sensor (c), and the DC power identical with the second microwave power P2 amplitude to be measured with the first microwave power P1 to be measured received on the coplanar waveguide transmission line (1) of first power sensor (a); The press welding block (4) of first power sensor (a) is connected to differential amplifier first input end (10), the press welding block (4) of second power sensor (b) is connected to differential amplifier second input end (11), differential amplifier output terminal (12) is connected to the AGC control end (13) of automatic gain controller (18), the press welding block (4) of the 3rd power sensor (c) connects the AGC input end (14) of automatic gain controller (18), and electric potential difference is by AGC output terminal (15) output of automatic gain controller.
2. microwave power detection device according to claim 1, the GaAs substrate (6) that it is characterized in that described power sensor is provided with gallium aluminium arsenic film (5), centre position at gallium aluminium arsenic film (5) subscript face is provided with thermoelectric pile (3), be respectively equipped with coplanar waveguide transmission line (1) and press welding block (4) in the position, both sides of gallium aluminium arsenic film (5) subscript face, be provided with tantalum nitride resistance (2) on the next door of coplanar waveguide transmission line (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202358773U CN201497775U (en) | 2009-09-25 | 2009-09-25 | Microwave power-detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202358773U CN201497775U (en) | 2009-09-25 | 2009-09-25 | Microwave power-detecting device |
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| CN2009202358773U Expired - Fee Related CN201497775U (en) | 2009-09-25 | 2009-09-25 | Microwave power-detecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175910A (en) * | 2011-03-08 | 2011-09-07 | 东南大学 | Micro-electro-mechanical system (MEMS) microwave power automatic detection system and detection method and preparation method thereof |
| CN108007610A (en) * | 2017-11-29 | 2018-05-08 | 北京无线电计量测试研究所 | A kind of waveguide calorimeter, double load calorimetric Low Power Standard devices comprising the waveguide calorimeter |
| CN110108930A (en) * | 2019-05-23 | 2019-08-09 | 深港产学研基地（北京大学香港科技大学深圳研修院） | Micro-nano microwave power detector and measurement method based on suspension low dimensional material |
-
2009
- 2009-09-25 CN CN2009202358773U patent/CN201497775U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175910A (en) * | 2011-03-08 | 2011-09-07 | 东南大学 | Micro-electro-mechanical system (MEMS) microwave power automatic detection system and detection method and preparation method thereof |
| CN102175910B (en) * | 2011-03-08 | 2013-04-24 | 东南大学 | Micro-electro-mechanical system (MEMS) microwave power automatic detection system, detection method and preparation method thereof |
| CN108007610A (en) * | 2017-11-29 | 2018-05-08 | 北京无线电计量测试研究所 | A kind of waveguide calorimeter, double load calorimetric Low Power Standard devices comprising the waveguide calorimeter |
| CN110108930A (en) * | 2019-05-23 | 2019-08-09 | 深港产学研基地（北京大学香港科技大学深圳研修院） | Micro-nano microwave power detector and measurement method based on suspension low dimensional material |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20110925 |