CN104614081A - Phase position detection method and circuit used in Terahertz solid circuit imaging - Google Patents
Phase position detection method and circuit used in Terahertz solid circuit imaging Download PDFInfo
- Publication number
- CN104614081A CN104614081A CN201510033815.4A CN201510033815A CN104614081A CN 104614081 A CN104614081 A CN 104614081A CN 201510033815 A CN201510033815 A CN 201510033815A CN 104614081 A CN104614081 A CN 104614081A
- Authority
- CN
- China
- Prior art keywords
- terahertz
- circuit
- power
- output terminal
- input end
- 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.)
- Pending
Links
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a phase position detection method and a phase position detection circuit used in Terahertz solid circuit imaging. The phase position detection method used in the Terahertz solid circuit imaging includes: using power allocation and vector power synthesis of difference signals in combination, and obtaining a vector triangle by receiving a group of the difference signals transmitted from a Terahertz source and respectively performing the power allocation and the power recombination synthesis on all paths of the signals; calculating so as to obtain phase change information of a detected object according to cosine law by detecting strength C1, F1 and G1 of all vector signals of the vector triangle. The phase position detection method and the phase position detection circuit used in the Terahertz solid circuit imaging not only can obtain strength information of Terahertz waves, but also can obtain the phase change information of the detected object after the Terahertz waves penetrate through the detected object, and can be used in phase position detection in the Terahertz solid circuit imaging.
Description
Technical field
The invention belongs to terahertz imaging and microelectronics technology, be specifically related to a kind of THz wave phase detecting circuit based on solid-state circuit.
Background technology
THz wave frequency range is between millimeter wave and infrared light, and its wavelength, between 30 μm ~ 3mm, has that wavelength is short, transmitance is high, be with the features such as wide, has broad application prospects in communicating etc. at terahertz imaging, Terahertz frequency spectrum with Terahertz.Because THz wave has very strong penetrability and low-yield characteristic to apolar substance, so lossless detection imaging can be carried out to a lot of material.Traditional terahertz detection imaging technique mainly adopts the method for optics to realize single-point detection, and image taking speed is slow, and the image resolution ratio obtained is low and system architecture complicated, bulky.In order to reduce system bulk, reduce costs, adopting microelectric technique to realize terahertz imaging has become Present Domestic this area research focus outer
The optical means of terahertz imaging mainly utilizes superlattice structure to form sub-energy level, by electronics in sub-transition between energy level, realize generation and the detection of THz wave, because the energy of THz wave is little, the thermal perturbation of environment is huge to its performance impact, so be no matter thz laser device or the terahertz detector of substate, all need to increase refrigeration system, make its work in very low temperatures.Microelectronics method, mainly adopt the microelectronic integrated circuit that the solid electronic device of based semiconductor is formed, these circuit can realize THz source, carry out the function such as mixing and amplification to terahertz signal, realize generation and the detection of the THz wave of characteristic frequency.
Currently available technology, based in the terahertz imaging system of solid-state circuit, owing to lacking effective Terahertz low noise amplifier, only can detect in the phase place of microwave and millimeter wave frequency range to signal, cannot obtain the signal phase information of Terahertz frequency range.And use semiconductor diode or three end electron devices THz continuous wave to be detected to the strength information that only can obtain THz wave, and can not phase information be obtained.How obtain Terahertz wave intensity based on solid-state circuit and phase information is one of technical difficult points faced in current THz continuous wave imaging system design simultaneously.
Summary of the invention
The object of this invention is to provide a kind of THz wave phase detecting circuit based on solid-state circuit, make the strength information that can not only obtain THz wave when using microelectric technique solid-state circuit to realize terahertz imaging system, and can obtain THz wave penetrate testee after phase place change information.
In order to solve above technical matters, the power division and the vector power that the present invention is based on differential signal synthesize the technological means mutually combined, the differential signal that one group emits from THz source is received, and respectively power division and power reconstruction synthesis are carried out to each road signal, obtain a vector triangle, conveniently can obtain phase information by detecting each vector signal intensity forming vector triangle like this, concrete technical scheme is as follows:
A kind of for the method for detecting phases in the imaging of Terahertz solid-state circuit, it is characterized in that: adopt the power division of differential signal and vector power to synthesize and mutually combine, received by the differential signal emitted from THz source a group, and respectively power division and power reconstruction synthesis are carried out to each road signal, obtain a vector triangle; By detecting each vector signal intensity and the C of described vector triangle
1, F
1and G
1, according to the cosine law
calculate the phase place change information obtained through testee.
For the phase detecting circuit in the imaging of Terahertz solid-state circuit, it is characterized in that comprising: Terahertz differential signal source and terahertz detector;
Described Terahertz differential signal source is made up of 1 THz wave circuit for generating, 1 Ba Lun and two emitting antenna and emitting antenna 1 and emitting antenna 2, the output terminal of THz wave circuit for generating is connected with the input end of Ba Lun, and two difference output ends of Ba Lun are connected with the feed end of emitting antenna 1 and the feed end of emitting antenna 2 respectively;
Described terahertz detector is made up of receiving antenna 1 and receiving antenna 2, power divider 1 and power divider 2, mixing amplifying circuit 1, mixing amplifying circuit 2, mixing amplifying circuit 3 and power combiner; Power divider 1 is connected with the output terminal of receiving antenna 1 with receiving antenna 2 respectively with the input end of power divider 2; An output terminal of power divider 1 is connected with the input end of mixing amplifying circuit 1, and another output terminal is connected with an input end of power combiner; An output terminal of power divider 2 is connected with the input end of mixing amplifying circuit 2, and another output terminal is connected with another input end of power combiner; The output terminal of power combiner is connected with mixing amplifying circuit 3 input end;
Terahertz differential signal source with the putting position of terahertz detector is: the output terminal of emitting antenna 1 is relative with the input end of receiving antenna 1; The output terminal of emitting antenna 2 is relative with the input end of receiving antenna 2.
Described power divider 1 has consistent size with power divider 2, and two output terminals have identical output power, and are the half of power input.
Described mixing amplifying circuit 1, mixing amplifying circuit 2 and mixing amplifying circuit 3 have identical circuit structure and circuit parameter, and have consistent characteristic and enlargement factor.
Principle of work of the present invention.In terahertz signal source, first produce a road terahertz signal by THz wave circuit for generating, convert the differential signal of a pair phase 180 degree through barron device part to, be expressed as signal with vector
with
signal
launched the receiving antenna 1 of rear direct arrival detector by emitting antenna 1, become signal
after received by detector, signal
after testee, signal is become after being launched by emitting antenna 2
then received by detector.In terahertz detector, receiving antenna 1 Received signal strength
and sent in power divider 1, power divider 1 exports 2 road equal and opposite in directions, is
signal
with
receiving antenna 2 Received signal strength
and sent in power divider 2, power divider 2 exports 2 road equal and opposite in directions, is
signal
with
signal
direct current signal C is exported after connecing mixing amplifying circuit 1
1,
wherein k is amplification coefficient.Signal
direct current signal F is exported after connecing mixing amplifying circuit 2
1,
by signal
and signal
connect 2 input ends of power combiner respectively, power combiner outputs signal
signal
expression formula be
signal
direct current signal G is exported after connecing mixing amplifying circuit 3
1,
when without testee, signal
with
phase 180 degree, equal and opposite in direction, therefore signal
i.e. G
1=0.When there being testee, due to signal
through there is phase place change during object, so signal
with
phase differential be no longer 180 degree, signal
now signal
with
form a vector triangle, by measuring
with
intensity size C
1, F
1and G
1, can signal be obtained according to the cosine law
through the phase place angle changing after testee.
The present invention has beneficial effect.The present invention synthesizes by the power division and vector power using differential signal the technological means mutually combined, the differential signal that one group emits from THz source is received, and respectively power division and power reconstruction synthesis are carried out to each road signal, obtain a vector triangle, conveniently phase information can be obtained like this by detecting each vector signal intensity forming vector triangle, overcoming the current terahertz imaging system based on solid-state circuit can not the technological difficulties of detected phase, can obtain intensity and the phase information of terahertz signal simultaneously; Avoid in traditional phase detecting circuit and use the complex unit such as low noise amplifier and IQ frequency mixer, make circuit structure simple, cost is low, with IC process compatible, is easy to miniaturization, can widely use.
Accompanying drawing illustrates:
Fig. 1 is electrical block diagram of the present invention.
Fig. 2 is vector signal of the present invention synthesis schematic diagram.
Embodiment:
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, structure of the present invention and implementation method are described in detail.
Described THz wave phase detecting circuit is made up of Terahertz differential signal source and terahertz detector two parts.As shown in Figure 1, described Terahertz differential signal source is made up of 1 THz wave circuit for generating, 1 barron device part and 2 emitting antennas, and described terahertz detector is made up of 2 receiving antennas, 2 power dividers, 1 power combiner and 3 mixing amplification circuit module.
Described THz wave circuit for generating and Ba Lun use and make on one chip based on CMOS technology, 2 road differential signals of generation
with
launch through external emission antenna 1 and emitting antenna 2 respectively; Described receiving antenna, power divider, power combiner and mixing amplifying circuit use and are made as terahertz detector chip based on CMOS technology.
Signal
launched the receiving antenna 1 of rear direct arrival detector by emitting antenna 1, become signal
after received by detector, signal
after testee, signal is become after being launched by emitting antenna 2
then received by detector.In terahertz detector, receiving antenna 1 Received signal strength
and sent in power divider 1, power divider 1 exports 2 road equal and opposite in directions, is
signal
with
receiving antenna 2 Received signal strength
and sent in power divider 2, power divider 2 exports 2 road equal and opposite in directions, is
signal
with
signal
direct current signal C is exported after connecing mixing amplifying circuit 1
1.Signal
direct current signal F is exported after connecing mixing amplifying circuit 2
1.By signal
and signal
connect 2 input ends of power combiner respectively, power combiner outputs signal
signal
direct current signal G is exported after connecing mixing amplifying circuit 3
1.When without testee, signal
with
phase 180 degree, equal and opposite in direction, therefore signal
i.e. G
1=0.When there being testee, due to signal
through there is phase place change during object, so signal
with
phase differential be no longer 180 degree, signal
now signal
with
form a vector triangle, as shown in Figure 2, by measuring
with
intensity size C
1, F
1and G
1, can signal be obtained according to the cosine law
through the phase place angle changing after testee be
Claims (4)
1. one kind for the method for detecting phases in the imaging of Terahertz solid-state circuit, it is characterized in that: adopt the power division of differential signal and vector power to synthesize and mutually combine, received by the differential signal emitted from THz source a group, and respectively power division and power reconstruction synthesis are carried out to each road signal, obtain a vector triangle; By detecting each vector signal intensity and the C of described vector triangle
1, F
1and G
1, according to the cosine law
calculate the phase place change information obtained through testee.
2. for the phase detecting circuit in the imaging of Terahertz solid-state circuit, it is characterized in that comprising: Terahertz differential signal source and terahertz detector;
Described Terahertz differential signal source is made up of 1 THz wave circuit for generating, 1 Ba Lun and two emitting antenna and emitting antenna 1 and emitting antenna 2, the output terminal of THz wave circuit for generating is connected with the input end of Ba Lun, and two difference output ends of Ba Lun are connected with the feed end of emitting antenna 1 and the feed end of emitting antenna 2 respectively;
Described terahertz detector is made up of receiving antenna 1 and receiving antenna 2, power divider 1 and power divider 2, mixing amplifying circuit 1, mixing amplifying circuit 2, mixing amplifying circuit 3 and power combiner; Power divider 1 is connected with the output terminal of receiving antenna 1 with receiving antenna 2 respectively with the input end of power divider 2; An output terminal of power divider 1 is connected with the input end of mixing amplifying circuit 1, and another output terminal is connected with an input end of power combiner; An output terminal of power divider 2 is connected with the input end of mixing amplifying circuit 2, and another output terminal is connected with another input end of power combiner; The output terminal of power combiner is connected with mixing amplifying circuit 3 input end;
Terahertz differential signal source with the putting position of terahertz detector is: the output terminal of emitting antenna 1 is relative with the input end of receiving antenna 1; The output terminal of emitting antenna 2 is relative with the input end of receiving antenna 2.
3. according to claim 2 a kind of for the phase detecting circuit in the imaging of Terahertz solid-state circuit, it is characterized in that: described power divider 1 has consistent size with power divider 2, two output terminals have identical output power, and are the half of power input.
4. according to claim 2 a kind of for the phase detecting circuit in the imaging of Terahertz solid-state circuit, it is characterized in that: described mixing amplifying circuit 1, mixing amplifying circuit 2 and mixing amplifying circuit 3 have identical circuit structure and circuit parameter, and have consistent characteristic and enlargement factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033815.4A CN104614081A (en) | 2015-01-22 | 2015-01-22 | Phase position detection method and circuit used in Terahertz solid circuit imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033815.4A CN104614081A (en) | 2015-01-22 | 2015-01-22 | Phase position detection method and circuit used in Terahertz solid circuit imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104614081A true CN104614081A (en) | 2015-05-13 |
Family
ID=53148630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510033815.4A Pending CN104614081A (en) | 2015-01-22 | 2015-01-22 | Phase position detection method and circuit used in Terahertz solid circuit imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104614081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453827A (en) * | 2017-08-31 | 2017-12-08 | 南通大学 | Cooperative frequency spectrum sensing method based on the cosine law |
| CN114813656A (en) * | 2022-02-28 | 2022-07-29 | 江苏大学 | Device and method for detecting quality of grain powder based on millimeter wave terahertz technology |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059541A (en) * | 2007-05-18 | 2007-10-24 | 东南大学 | Microelectronic machinery microwave frequency detector and its preparation method |
| CN101526464A (en) * | 2008-03-05 | 2009-09-09 | 清华大学 | Phase contrast imaging method and device |
| CN101726664A (en) * | 2008-10-27 | 2010-06-09 | 华为技术有限公司 | Method, device and system for measuring signal phase difference |
| CN102680091A (en) * | 2012-06-12 | 2012-09-19 | 中国科学院上海微***与信息技术研究所 | High-speed detection method and device for terahertz |
| CN104155521A (en) * | 2013-05-15 | 2014-11-19 | 国家电网公司 | Method and apparatus for determining phase difference |
-
2015
- 2015-01-22 CN CN201510033815.4A patent/CN104614081A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059541A (en) * | 2007-05-18 | 2007-10-24 | 东南大学 | Microelectronic machinery microwave frequency detector and its preparation method |
| CN101526464A (en) * | 2008-03-05 | 2009-09-09 | 清华大学 | Phase contrast imaging method and device |
| CN101726664A (en) * | 2008-10-27 | 2010-06-09 | 华为技术有限公司 | Method, device and system for measuring signal phase difference |
| CN102680091A (en) * | 2012-06-12 | 2012-09-19 | 中国科学院上海微***与信息技术研究所 | High-speed detection method and device for terahertz |
| CN104155521A (en) * | 2013-05-15 | 2014-11-19 | 国家电网公司 | Method and apparatus for determining phase difference |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453827A (en) * | 2017-08-31 | 2017-12-08 | 南通大学 | Cooperative frequency spectrum sensing method based on the cosine law |
| CN114813656A (en) * | 2022-02-28 | 2022-07-29 | 江苏大学 | Device and method for detecting quality of grain powder based on millimeter wave terahertz technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Huang et al. | From terahertz imaging to terahertz wireless communications | |
| Al-Eryani et al. | Fully integrated single-chip 305–375-GHz transceiver with on-chip antennas in SiGe BiCMOS | |
| Al Hadi et al. | A broadband 0.6 to 1 THz CMOS imaging detector with an integrated lens | |
| Al Hadi et al. | A terahertz detector array in a SiGe HBT technology | |
| Peng et al. | A 94 GHz 3D image radar engine with 4TX/4RX beamforming scan technique in 65 nm CMOS technology | |
| Saeidi et al. | THz prism: One-shot simultaneous localization of multiple wireless nodes with leaky-wave THz antennas and transceivers in CMOS | |
| Statnikov et al. | A 0.32 THz FMCW radar system based on low-cost lens-integrated SiGe HBT front-ends | |
| CN104122273B (en) | The radiometer synthesized based on multichannel frequency band | |
| CN104614081A (en) | Phase position detection method and circuit used in Terahertz solid circuit imaging | |
| CN104701634B (en) | A kind of quasi-optical power combing of Terahertz and amplifying device | |
| Zheng et al. | A linear-array receiver AFE circuit embedded 8-to-1 multiplexer for direct ToF imaging LiDAR applications | |
| CN113589309B (en) | Non-cooperative target space position detection method based on microwave photon technology | |
| KR102351574B1 (en) | Photo diode | |
| Pfeiffer | Integrated circuit design for terahertz applications | |
| KR101334259B1 (en) | Hybrid Milimeter Wave Image Sensor with Single Antenna Structure | |
| CN107966712B (en) | A kind of earth observation laser radar for the detection of trace gas column concentration | |
| Bowers et al. | A compact optically driven travelling-wave radiating source | |
| CN103943964A (en) | Si-based field effect transistor annular terahertz detector antenna based on CMOS manufacturing process | |
| CN110657887B (en) | Terahertz detector based on cross-coupling structure | |
| Chiu et al. | A 340-GHz high-gain flip-chip packaged dielectric resonator antenna for THz imaging applications | |
| CN113608227B (en) | Photon-assisted radar mixing and direct wave self-interference cancellation integrated device and method | |
| Doghri et al. | Early demonstration of a passive millimeter-wave imaging system using substrate integrated waveguide technology | |
| Yan et al. | CMOS THz transmissive imaging system | |
| Tseng et al. | High-resolution 3-dimensional radar imaging based on a few-cycle w-band photonic millimeter-wave pulse generator | |
| JP4675961B2 (en) | Photodiode array and optical microwave transmission system receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150513 |