CN1395338A - Heterodyne millimetric wave space electricity-feeding transmission method and its focal array imaging structure - Google Patents
Heterodyne millimetric wave space electricity-feeding transmission method and its focal array imaging structure Download PDFInfo
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- CN1395338A CN1395338A CN 02138072 CN02138072A CN1395338A CN 1395338 A CN1395338 A CN 1395338A CN 02138072 CN02138072 CN 02138072 CN 02138072 A CN02138072 A CN 02138072A CN 1395338 A CN1395338 A CN 1395338A
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Abstract
The invention relates to the method for transmitting the spatial feeding of the heterodyne type millimeter wave as well as the imaging structure of the focal plane array. The method includes the following steps. The target-scattered electromagnetic wave of focalized on the focal plane array by the imaging lens. The array element antenna receives the wave, which through the polarization separator is sent to the mixer of the array element receiver. The local oscilaltion irradiates the another focal plane array, and then goes to the mixer of the array element receiver also. The imaging structure includes the lens and the focal plane array. The focal plane array consists of the mixer, the antenna array for receiving the local oscillation and the antenna array for receiving target-scattered electromagnetic wave.
Description
One, technical field
The present invention relates to a kind of space electricity-feeding transmission method and focal array imaging structure thereof that is used for the heterodyne millimetric wave of heterodyne millimetric wave focal array imaging.
Two, background technology
A critical component of millimeter wave focal array imaging system is a focal plane battle array structure.The a burst of unit of focal plane is an antenna, is used to receive imaging len (or speculum) and focuses on diffraction spot on the focal plane, and then the electromagnetic signal that receives is sent to array element receiver place.Multiple focal plane battle array structure has been proposed at present.For example, loudspeaker battle array, corrugated horn battle array, integrated loudspeaker battle array, integrated line of rabbet joint antenna array places the antenna integrated battle array, fly's eye battle array at the expansion hemisphere di-lens back side etc.The working method of array element receiver has heterodyne system and direct detection formula.The direct detection formula is the signal of sending here with detection tube or the direct induction antenna of other device, delivers to back one-level amplifier then signal is amplified.Direct detection amplifying type circuit structure is simple, but the sensitivity of wave detector is low, is difficult for surveying small-signal.Heterodyne system adopts frequency mixer, and frequency mixer has three ports.A port connects antenna, and a port connects local oscillator, and a port is as the output intermediate-freuqncy signal.The course of work is, the external signal of antenna input and signal mixing in frequency mixer of local oscillator input, and the difference frequency signal of getting both is intermediate-freuqncy signal output, through the amplifier amplification, delivers to late-class circuit then again.Heterodyne system is highly sensitive, but the circuit structure complexity.For 100 * 100 yuan face battle array, need 10,000 beat receivers altogether, local oscillation signal is transferred to this 10,000 tasks that the receiver place is a difficulty.At first, 10,000 receivers are lined up the face battle array, and array element abuts against together mutually, the distance of adjacent array element receiver is very near, the space that stays is very little, and the distribution of transmission line in battle array of transmission local oscillation signal is the thing of a difficulty with being connected, but also will reserve the space of settling the intermediate frequency outlet line.Secondly, be transferred to local oscillation signal needs low-loss transmission line on each receiver, but at millimeter wave frequency band, the loss of transmission line is bigger usually.Therefore bring some problems, the one, the requirement local oscillation power is big; The 2nd, the power delivery loss is big, and the power delivery loss greatly also brings the problem of parts heating heat radiation.Such as, if receiver needs the local oscillation power of 5 milliwatts, 10,000 just need 50 watts, suppose that there is 3 decibels loss on every road, then need 100 watts power, wherein 50 watts become heat and need dissipate.At millimeter wave frequency band, the power itself that produces tens watts is exactly the thing of a difficulty, has some power dissipation to fall again, and this is that system works is unallowable.The loss in fact average every road will be above 3 decibels.Therefore, the problem of beat receiver is how local oscillation signal effectively is transferred on the receiver frequency mixer to low consumption.Can significantly improve the working sensitivity of receiver like this, can effectively utilize local oscillation signal power again, also reduce focal plane battle array structure complexity and processing and fabricating cost and job costs simultaneously.
Three, technical scheme
Technical problem: the invention provides a kind of space electricity-feeding transmission method of the heterodyne millimetric wave that can reduce the local oscillation power loss and the focal array imaging structure of compact conformation thereof.
Technical scheme 1: the present invention is a kind of space electricity-feeding transmission method that is used for the heterodyne millimetric wave of heterodyne millimetric wave focal array imaging, the electromagnetic wave of target scattering is focused on the focal plane battle array by the imaging mirror, receives and deliver to by polarization separator the frequency mixer of array element receiver again through the focal plane array-element antenna; After shining on another front array-element antenna of focal plane battle array, local oscillation signal is sent to the frequency mixer of array element receiver, before local oscillation signal shines the focal plane battle array, after waiting amplitude wave beam radiator to shine again on the spatial power distributor, local oscillation power being distributed into several thin wave beams, deliver to array-element antenna earlier by power divider.
Technical scheme 2: the present invention is a kind of focal array imaging structure, comprise imaging mirror and focal plane battle array, the imaging mirror is positioned at a side of focal plane battle array, the focal plane battle array is made up of frequency mixer and the local oscillation signal receiving antenna array and the target scattering electromagnetic wave receiving antenna array that are positioned at the frequency mixer both sides, the every pair of array element that is positioned on frequency mixer both sides local oscillation signal receiving antenna array and the target scattering electromagnetic wave receiving antenna array is joined with therebetween frequency mixer, both sides at frequency mixer also are provided with polarization separator, are provided with the spatial power distributor and wait amplitude wave beam radiator at the opposite side of above-mentioned focal plane battle array.
Beneficial effect: 1. the characteristics of the method for the invention shine on the spatial power distributor after being to wait the amplitude wave beam to handle the local oscillation power, by the spatial power distributor it is distributed into the thin wave beam of multi beam again and exposes on the corresponding separately antenna array array element, that is: this method be the mode of taking space electricity-feeding with local oscillation power be transferred to the focal plane battle array in establish frequency mixer, rather than the method for employing wire transmission, so, this method has been avoided the power loss of local oscillation signal on transmission line, has reduced the power delivery loss of local oscillation signal.2. structure of the present invention, especially adopt amplitude wave beam radiator and spatial power distributors such as lens arra and di-lens, wire transmission local oscillation signal in the prior art is improved to the wireless mode mode of space electricity-feeding (promptly with) transmission local oscillation signal, therefore, from structure, saved the local oscillation signal transmission line between array element in the focal plane battle array, thereby saved this nervous space in the focal plane battle array, simplify the structure, also avoided simultaneously the power loss of local oscillation signal on transmission line, so structure of the present invention not only has advantage of simple structure, and can reduce the power delivery loss of local oscillation signal.
Four, description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is a burst of meta structure schematic diagram of the focal plane of the built-in polarization separator embodiment of the present invention (A among the figure, B are the built-in wiregrating that is positioned at the frequency mixer both sides).
Fig. 3 is another example structure schematic diagram of array element polarization separator of the present invention.
Fig. 4 is a spatial power distributor example structure schematic diagram of the present invention.
Fig. 5 is that the present invention waits amplitude wave beam radiator front view.
Fig. 6 is the structure enlarged diagram of the local at the present invention center again to edge of waiting amplitude wave beam radiator.
Fig. 7 is that the present invention waits amplitude wave beam radiator left view.
Fig. 8 is embodiment of the invention part (is core with a frequency mixer) structural representation.
Five, embodiment
1 one kinds of space electricity-feeding transmission methods that are used for the heterodyne millimetric wave of heterodyne millimetric wave focal array imaging of embodiment, the electromagnetic wave of target scattering is focused on the focal plane battle array by the imaging mirror, receives and deliver to by polarization separator the frequency mixer of array element receiver again through the focal plane array-element antenna; After shining on another front array-element antenna of focal plane battle array, local oscillation signal is sent to the frequency mixer of array element receiver, before local oscillation signal shines the focal plane battle array, after waiting amplitude wave beam radiator to shine again on the spatial power distributor, local oscillation power being distributed into several thin wave beams, deliver to array-element antenna earlier by power divider.
2 one kinds of focal array imaging structures of embodiment, comprise imaging mirror 4 and focal plane battle array 1, imaging mirror 4 both can be a refractor, it also can be diffraction lens, imaging mirror 4 is positioned at a side of focal plane battle array, focal plane battle array 1 is made up of frequency mixer 11 and the local oscillation signal receiving antenna array 12 and the target scattering electromagnetic wave receiving antenna array 13 that are positioned at frequency mixer 11 both sides, the every pair of array element that is positioned on frequency mixer 11 both sides local oscillation signal receiving antenna arrays 12 and the target scattering electromagnetic wave receiving antenna array 13 is joined with therebetween frequency mixer, both sides at frequency mixer 11 also are provided with polarization separator 5 and 6, opposite side in above-mentioned focal plane battle array is provided with spatial power distributor 2 and constant amplitude wave beam radiator 3, spatial power distributor 2 is a di-lens array 21, lens unit 211 on the di-lens array 21 corresponds to the array element on the antenna array 12, polarization separator 5 and 6 is the front polarization separator and adopts orthogonal wiregrating, and be positioned at the both sides of focal plane battle array, Deng amplitude wave beam radiator is di-lens, step cutting pattern 31 is arranged on lens, wait the amplitude beam radiation also can adopt the feed irradiator.
3 one kinds of focal array imaging structures of embodiment, comprise imaging mirror 4 and focal plane battle array 1, imaging mirror 4 both can be an imaging len, imaging mirror 4 is positioned at a side of focal plane battle array, focal plane battle array 1 is made up of frequency mixer 11 and the local oscillation signal receiving antenna array 12 and the target scattering electromagnetic wave receiving antenna array 13 that are positioned at frequency mixer 11 both sides, the every pair of array element that is positioned on frequency mixer 11 both sides local oscillation signal receiving antenna arrays 12 and the target scattering electromagnetic wave receiving antenna array 13 is joined with therebetween frequency mixer, both sides at frequency mixer 11 also are provided with polarization separator 5 and 6, opposite side in above-mentioned focal plane battle array is provided with spatial power distributor 2 and waits amplitude wave beam radiator 3, spatial power distributor 2 is a di-lens array 21, lens unit 211 on the di-lens array 21 corresponds to the array element on the antenna array 12, antenna array on the focal plane battle array is antenna integrated battle array, polarization separator is a coupling slot, be used for by the electromagnetic coupling slot 8 of target scattering perpendicular with coupling slot 7 by local oscillation signal, local oscillation signal enters frequency mixer 11 by local oscillation signal coupling slot 7, the target scattering electromagnetic wave enters frequency mixer 11 by target scattering electromagnetic wave coupling slot 8, also is provided with intermediate-freuqncy signal output line 114 on frequency mixer 11.
4 one kinds of focal array imaging structures of embodiment, comprise imaging mirror 4 and focal plane battle array 1, imaging mirror 4 both can be a refractor, it also can be diffraction lens, imaging mirror 4 is positioned at a side of focal plane battle array, focal plane battle array 1 is made up of frequency mixer 11 and the local oscillation signal receiving antenna array 12 and the target scattering electromagnetic wave receiving antenna array 13 that are positioned at frequency mixer 11 both sides, the every pair of array element that is positioned on frequency mixer 11 both sides local oscillation signal receiving antenna arrays 12 and the target scattering electromagnetic wave receiving antenna array 13 is joined with therebetween frequency mixer, both sides at frequency mixer 11 also are provided with polarization separator 5 and 6, opposite side in above-mentioned focal plane battle array is provided with spatial power distributor 2 and constant amplitude wave beam radiator 3, spatial power distributor 2 is a di-lens array 21, lens unit 211 on the di-lens array 21 corresponds to the array element on the antenna array 12, local oscillation signal receiving antenna array 12 and target scattering electromagnetic wave receiving antenna array 13 are the loudspeaker battle array, and polarization separator is an array element polarization separator and by in the loudspeaker unit that places the loudspeaker battle array; The array element polarization separator is the wiregrating of external diameter less than the loudspeaker bore, and the wiregrating that is positioned at local oscillation signal receiving antenna array 12 is perpendicular with the wiregrating that is positioned at target scattering electromagnetic wave receiving antenna array 13.
5 one kinds of focal array imaging structures of embodiment, comprise imaging mirror 4 and focal plane battle array 1, imaging mirror 4 both can be a refractor, it also can be diffraction lens, imaging mirror 4 is positioned at a side of focal plane battle array, it is characterized in that focal plane battle array 1 is made up of frequency mixer 11 and the local oscillation signal receiving antenna array 12 and the target scattering electromagnetic wave receiving antenna array 13 that are positioned at frequency mixer 11 both sides, the every pair of array element that is positioned on frequency mixer 11 both sides local oscillation signal receiving antenna arrays 12 and the target scattering electromagnetic wave receiving antenna array 13 is joined with therebetween frequency mixer, both sides at frequency mixer 11 also are provided with polarization separator 5 and 6, opposite side in above-mentioned focal plane battle array is provided with spatial power distributor 2 and constant amplitude wave beam radiator 3, spatial power distributor 2 is a di-lens array 21, lens unit 211 on the di-lens array 21 corresponds to the array element on the antenna array 12, local oscillation signal receiving antenna array 12 and target scattering electromagnetic wave receiving antenna array 13 are the loudspeaker battle array, and polarization separator is an array element polarization separator and by in the loudspeaker unit that places the loudspeaker battle array; The array element polarization separator adopts coupling slot, the coupling slot 51 that is positioned at local oscillation signal receiving antenna array 12 is perpendicular with the coupling slot 61 that is positioned at target scattering electromagnetic wave receiving antenna array 13, on frequency mixer 11, be provided with target scattering electromagnetic wave incoming line 62, frequency mixer 11 is made up of mixer tube 113, incoming line 112 and output line 111, incoming line 112 and intermediate frequency output line 111 are connected in mixer tube 113 respectively, and the target scattering electromagnetic wave enters frequency mixer 11 by coupling slot 61 target approach scattering electromagnetic wave incoming lines 62 and by coupler 621.
Claims (9)
1, a kind of space electricity-feeding transmission method that is used for the heterodyne millimetric wave of heterodyne millimetric wave focal array imaging, the electromagnetic wave of target scattering is focused on the focal plane battle array by the imaging mirror, receives and deliver to by polarization separator the frequency mixer of array element receiver again through the focal plane array-element antenna; After shining on another front array-element antenna of focal plane battle array, local oscillation signal is sent to the frequency mixer of array element receiver, it is characterized in that before local oscillation signal shines the focal plane battle array, after waiting amplitude wave beam radiator to shine again on the spatial power distributor, local oscillation power being distributed into several thin wave beams, deliver to array-element antenna earlier by power divider.
2, a kind of focal array imaging structure that is used to implement claim 1, comprise imaging mirror (4) and focal plane battle array (1), imaging mirror (4) is positioned at a side of focal plane battle array, it is characterized in that focal plane battle array (1) is made up of frequency mixer (11) and the local oscillation signal receiving antenna array (12) and the target scattering electromagnetic wave receiving antenna array (13) that are positioned at frequency mixer (11) both sides, the every pair of array element that is positioned on frequency mixer (11) both sides local oscillation signal receiving antenna arrays (12) and the target scattering electromagnetic wave receiving antenna array (13) is joined with therebetween frequency mixer, also be provided with polarization separator (5 and 6) in the both sides of frequency mixer (11), the opposite side of above-mentioned focal plane battle array be provided with spatial power distributor (2) and etc. amplitude wave beam radiator (3).
3, focal array imaging structure according to claim 2 is characterized in that spatial power distributor (2) is a di-lens array (21), and the lens unit (211) on the di-lens array (21) corresponds to the array element on the antenna array (12).
4,, it is characterized in that polarization separator (5 and 6) is the front polarization separator and adopts orthogonal wiregrating, and be positioned at the both sides of focal plane battle array according to claim 2 or 3 described focal array imaging structures.
5, according to claim 2 or 3 described focal array imaging structures, it is characterized in that polarization separator is a coupling slot, be used for by the electromagnetic coupling slot of target scattering (8) with perpendicular by the coupling slot (7) of local oscillation signal, local oscillation signal enters frequency mixer (11) by local oscillation signal coupling slot (7), the target scattering electromagnetic wave enters frequency mixer (11) by target heat radiation electromagnetic wave coupling slot (8), also is provided with intermediate-freuqncy signal output line (114) on frequency mixer (11).
6, according to claim 2 or 3 described focal array imaging structures, it is characterized in that local oscillation signal receiving antenna array (12) and target scattering electromagnetic wave receiving antenna array (13) are the loudspeaker battle array, polarization separator is an array element polarization separator and by in the loudspeaker unit that places the loudspeaker battle array.
7, focal array imaging structure according to claim 6, it is characterized in that the array element polarization separator is the wiregrating of external diameter less than the loudspeaker bore, the wiregrating that is positioned at local oscillation signal receiving antenna array (12) is perpendicular with the wiregrating that is positioned at target scattering electromagnetic wave receiving antenna array (13).
8, focal array imaging structure according to claim 6, it is characterized in that the array element polarization separator adopts coupling slot, the coupling slot (51) that is positioned at local oscillation signal receiving antenna array (12) is perpendicular with the coupling slot (61) that is positioned at target scattering electromagnetic wave receiving antenna array (13), on frequency mixer (11), be provided with target scattering electromagnetic wave incoming line (62), frequency mixer (11) is by mixer tube (113), incoming line (112) and output line (111) are formed, incoming line (112) and intermediate frequency output line (111) are connected in mixer tube (113) respectively, and the target scattering electromagnetic wave is by coupling slot (61) target approach scattering electromagnetic wave incoming line (62) and enter frequency mixer (11) by coupler (621).
9, according to claim 2 or 3 described focal array imaging structures, it is characterized in that waiting amplitude wave beam radiator is di-lens, and step cutting pattern is arranged on lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021380724A CN1158537C (en) | 2002-08-06 | 2002-08-06 | Heterodyne millimetric wave space electricity-feeding transmission method and its focal array imaging structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021380724A CN1158537C (en) | 2002-08-06 | 2002-08-06 | Heterodyne millimetric wave space electricity-feeding transmission method and its focal array imaging structure |
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| CN1395338A true CN1395338A (en) | 2003-02-05 |
| CN1158537C CN1158537C (en) | 2004-07-21 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866018A (en) * | 2010-05-27 | 2010-10-20 | 中国科学院上海微系统与信息技术研究所 | Radio frequency receiving and transmitting front end for millimeter wave holographic imaging security check system |
| CN101126776B (en) * | 2007-08-24 | 2012-01-04 | 中国科学院紫金山天文台 | Broad band and high resolution ratio millimeter wave and sub millimeter wave signal detecting method |
| CN102427168A (en) * | 2011-08-08 | 2012-04-25 | 东南大学 | Space feed transmission method of terahertz wave and focal plane array imaging structure |
| CN101689691B (en) * | 2007-09-07 | 2012-10-31 | 泰勒斯公司 | Omt type broadband multiband transmission-reception coupler-separator for RF frequency telecommunications antennas |
| CN106872975A (en) * | 2017-02-27 | 2017-06-20 | 东南大学 | A kind of millimeter wave active near-field imaging device |
| CN112526512A (en) * | 2020-11-23 | 2021-03-19 | 电子科技大学 | High-power large-caliber broadband millimeter wave air-fed phase control array radar system and imaging method |
| CN113740797A (en) * | 2021-09-09 | 2021-12-03 | 哈尔滨工程大学 | High-precision single-snapshot target arrival angle estimation method under lens array |
-
2002
- 2002-08-06 CN CNB021380724A patent/CN1158537C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126776B (en) * | 2007-08-24 | 2012-01-04 | 中国科学院紫金山天文台 | Broad band and high resolution ratio millimeter wave and sub millimeter wave signal detecting method |
| CN101689691B (en) * | 2007-09-07 | 2012-10-31 | 泰勒斯公司 | Omt type broadband multiband transmission-reception coupler-separator for RF frequency telecommunications antennas |
| CN101866018A (en) * | 2010-05-27 | 2010-10-20 | 中国科学院上海微系统与信息技术研究所 | Radio frequency receiving and transmitting front end for millimeter wave holographic imaging security check system |
| CN101866018B (en) * | 2010-05-27 | 2012-09-05 | 中国科学院上海微系统与信息技术研究所 | Radio frequency receiving and transmitting front end for millimeter wave holographic imaging security check system |
| CN102427168A (en) * | 2011-08-08 | 2012-04-25 | 东南大学 | Space feed transmission method of terahertz wave and focal plane array imaging structure |
| CN106872975A (en) * | 2017-02-27 | 2017-06-20 | 东南大学 | A kind of millimeter wave active near-field imaging device |
| CN106872975B (en) * | 2017-02-27 | 2019-04-30 | 东南大学 | A kind of millimeter wave active near-field imaging device |
| CN112526512A (en) * | 2020-11-23 | 2021-03-19 | 电子科技大学 | High-power large-caliber broadband millimeter wave air-fed phase control array radar system and imaging method |
| CN113740797A (en) * | 2021-09-09 | 2021-12-03 | 哈尔滨工程大学 | High-precision single-snapshot target arrival angle estimation method under lens array |
| CN113740797B (en) * | 2021-09-09 | 2023-10-03 | 哈尔滨工程大学 | High-precision single-snapshot target arrival angle estimation method under lens array |
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| CN1158537C (en) | 2004-07-21 |
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