CN1232577A - Improved waveguide for use in dual polarisation probe system - Google Patents
Improved waveguide for use in dual polarisation probe system Download PDFInfo
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- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
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- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
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Abstract
A waveguide for use with a dual polarization waveguide probe system which provides an improved frequency response across a desired frequency range (10.7 to 12.75 GHz) and particularly at the band edges. This is achieved by providing a waveguide with a rotator that incorporates a reflector plate in combination with a differential phase shifter in the form of a waveguide of slightly asymmetrical cross section so that orthogonal signals which travel through this portion have a different cut-off wavelength. This results in a rotator which achieves 180 DEG of phase shift between two orthogonal components across the frequency range of signals received by the waveguide. The reflector plate and the differential phase shifter have inverse frequency characteristics so that the combined phase shift characteristic of the rotator has a flatter frequency characteristic.
Description
The present invention relates to the waveguide in the dual polarization waveguide detection system, this detection system is used for receiving two kinds of signals of orthogonal polarization in the same frequency range that satellite sends in satellite antenna.Especially, the present invention relates to the modified model waveguide that uses together with the low noise block receiver, in this receiver, placed two detectors the broadcast singal that needs in the waveguide is coupled to external circuit.
The applicant encloses among the international application book WO92/22938 that provides, and has described a kind of dual polarization waveguide detection system.In this system, waveguide uses with the low noise block receiver, and two detectors are positioned over and are used for being received in linearly polarized energy on two orthogonal directions in the receiver.Detector and single column type bar reflector in same fore-and-aft plane, and with reflector on relative both sides.This reflector reflects the polarized signal of a certain direction, sees through the signal of quadrature with it simultaneously, make the insertion loss of its signal minimum, and then reflection is through the orthogonal signalling of rotation.Detector is positioned at from the quarter-wave place of reflector.Simultaneously placed the reflection circulator at an end of waveguide, this reflector becomes the thin slice of miter angle and the forward position that is positioned at this sheet local short-circuiting device of afterwards about quarter-wave (λ/4) to form by one with the signals having linear polarisation of incident.This dish resolves into two equal components in the orthogonal plane to the energy of incident.One-component is reflected back by the forward position, and another component is reflected back by the short-circuiting device of waveguide.Synthetic again by signal like this, the phase shifts of 180 degree just produce 90 degree and rotate between the reflecting component in the linear polarization plane of incident, thus the output signal that makes waveguide is still in same fore-and-aft plane.
In addition, among International Patent Application PCT/GB96/00332 that the applicant provides, a kind of follow-on dual polarization waveguide detection system that is used for novel satellite system broadband transmission has been described.In this improved detector, a stranded plane of reflection is arranged in the detector shell, this plane of reflection contains two signal reflex limits at least, can be used to produce two independently signal reflexs so at least.Many signal reflections off structures can make detection system make decay minimum at wideer band output signal.
Though follow-on system has good frequency response in given frequency range, discover that the consume level in band edge still produces quite serious performance reduction.Along with the increase of the channel number that uses in the satellite system, wish system in whole frequency range with performance work equally stably, that is to say, minimum decay is provided in the marginal portion of frequency range.
One of target of the present invention just provides a kind of modified model waveguide that is used for dual polarisation probe system to eliminate or to reduce described shortcoming.
Described conception can realize that this circulator includes the plane of reflection in conjunction with the differential phase shift part by the waveguide that is used for dual polarization waveguide detection system that has circulator is provided.Differential phase shift partly makes waveguide have slight asymmetric cross section, and Chuan Shu orthogonal signalling just have different cut-off wavelengths so in this section.This has just formed a circulator, and it can make the phase shifts that have 180 degree between two components of the signal that waveguide receives in frequency range.The plane of reflection and differential phase shift partly have complementary frequency characteristic, so the synthetic phase-shift characterisitc of circulator has frequency characteristic stably in required frequency range.
In a preferred version, reflector comprises the single reflector plate that only has a reflecting surface, the differential phase shift part is cast with two groups of planes of reflection in waveguide cavity, the first pair of Plane Installation with the position of this reflector plate at a distance of first distance, and the second pair of Plane Installation with this reflector plate at a distance of nearer second distance place, the degree of second pair of reflecting surface insertion chamber wall is more shallow, and such second pair of reflecting surface is shorter apart from the distance of reflector cavity or central axis.The another kind of implementation of reflector is to form the single plane of reflection in that the elliptical guide that is coupled with cylindrical waveguide is inner.Oval part just forms two kinds of different cut-off wavelengths for orthogonal signalling in the difference that different cross sections produce.In addition, thus asymmetric other appropriate configuration that produces different cut-off wavelengths by cross section also can realize the differential phase shift part.
A first aspect of the present invention provides the waveguide of the dual polarization waveguide detection system that is used for receiving at least two orthogonally polarized signals, and described waveguide comprises the waveguide that can receive two orthogonal signalling at least.This waveguide is by forming with the lower part:
Reach first detector of waveguide inside from the waveguide cavity wall.Described first detector be fit to receive described and detector at same fore-and-aft plane, navigate within the orthogonal signalling in the waveguide cavity.
From the reflector arrangement that the waveguide cavity wall is stretched, reflector arrangement is positioned at the downstream of fore-and-aft plane first detector, is used for the signal reflex in described first orthogonal plane to first sniffer, allows signal in second orthogonal plane along waveguide simultaneously; Be positioned at the downstream of described fore-and-aft plane first reflector and be stretched over second sniffer of waveguide inside from the waveguide cavity wall; The signal reflex and the whirligig that comprise the short-circuiting device of waveguide end, it is positioned at the downstream direction of described second detector, be used for receiving, rotate described second orthogonally polarized signal, and it is reflected back along described waveguide, such second sniffer just can receive through rotation, the signal of reflection, described signal reflex whirligig comprises and comprises forward position reflector plate thereon as the first reflection whirligig, to provide at least one reflection limit part to reflect first component of described second orthogonally polarized signal, this reflection limit part is positioned at the waveguide end-to-end distance from the suitable position of short-circuiting device.The contiguous Plane of rotation of differential phase shift device, described differential phase shift device has asymmetric a little cross section, and therefore described second orthogonally polarized signal, first and second components partly produce phase deviation at differential phase shift.Then, divide the further phase shift of phase shift part in the transmission return difference, reflect back from described reflection limit part and short-circuiting device respectively, so that synthetic again, described first and second components have different cut-off wavelengths, are used for detecting re-synthesizing signals by second sniffer.
Best, described reflection and whirligig have only single reflection limit part at the Width of waveguide.The differential phase shift device can be realized by the asymmetrical unit that is cast in the waveguide internal reflection surface easily.Best, these two reflectings surface lay respectively at the both sides of waveguide, stretch from the plane of reflection along wave guide direction abreast.In addition, this asymmetric part can be realized by elliptic waveguide.The upstream reflecting surface can be placed on than downstream reflecting surface from the farther place of waveguide surface, thereby forms impedance matching structure with first (downstream) reflecting surface.
Waveguide differential phase shift device can be realized by at least two pairs of step reflectings surface easily.In addition, asymmetric part can not realize by there be seamlessly transitting of obvious step along waveguide yet, thereby substitutes reflecting surface.Seamlessly transit and the side that is cast in waveguide with reflecting the limit partial parallel.
The second aspect of this aspect provides a kind of method, this method is in the frequency range of single waveguide, at least can receive the first and second two kinds of orthogonally polarized signals, and two kinds of output signals are provided in identical fore-and-aft plane, so that in frequency range, produce response characteristic stably.Said method comprising the steps of:
First detector is provided in described waveguide, receives first orthogonally polarized signal;
Provide the reflection unit that is parallel to the described first detector downstream in the waveguide, to reflect described first orthogonally polarized signal and to pass through described second orthogonally polarized signal;
Provide to be parallel to described reflection unit in the waveguide and at second detector of its downstream direction, second detector and the complete quadrature of described second orthogonally polarized signal make second orthogonally polarized signal see through second detector and are not received; End in waveguide provides signal reflex and whirligig, described second detector of the first component reflected back of described second orthogonally polarized signal;
Allow the second component of described second orthogonally polarized signal be transferred to the short-circuiting device of waveguide, the amplitude that changes this second component makes it to have the cut-off wavelength different with first component.
The short-circuiting device of described second component from waveguide reflected back.
Again first, second component of synthetic described second orthogonally polarized signal, generating synthetic reflected signal, reflected signal that this is synthetic and described second detector in same plane, thereby can be detected by second detector.Described first and second components have complementary frequency characteristic, just produce frequency response stably like this when synthetic in described frequency range.
Reflection and whirligig are made up of the differential phase shift part and the plane of reflection.The differential phase shift part becomes miter angle with incoming signal, so just produces phase shift between described first and second components of quadrature (level) signal.Further phase shift is produced by the reflecting surface in downstream.The combination of these steps just reconfiguring the phase shift that produces 180 degree between two parts of signal, provides composite signal in second detector plane.
Others of the present invention provide dual polarization waveguide sniffer, and described device comprises first and second detectors in the waveguide, waveguide and first reflector of isolating them, and (described the one the second detectors and reflector are in same plane.) and the second detectable signal generator that polarization components is provided for described second detector.And the described second detector generator comprises signal reflex and whirligig, this reflection and whirligig are the acceptance reflection rotary polarization component of second detector, described reflection and whirligig comprise reflection limit part and the differential phase shift part that reflects described polarized signal first component, and the differential phase shift part is made up of the short-circuiting device of slight asymmetrical guide part and waveguide end, thereby the second component that reflects back is had and the different cut-off wavelength of described first component.First and second components have complementary frequency characteristic, when synthesizing again, will produce frequency characteristic stably in frequency range.
In conjunction with the accompanying drawings in the description to this patent, described and other aspect will be clearer below, and description of drawings is as follows:
Fig. 1 is the low noise block receiver cross-sectional view taken that realizes according to the preferred embodiment of the present invention, and the waveguide photodetector in this receiver is made up of waveguide, the plane of reflection and differential phase shift device.
Fig. 2 be among Fig. 1 waveguide along the profile of 2-2 line.
Fig. 3 is along the profile of 3-3 line among Fig. 2.
Fig. 4 is along the profile of 4-4 line among Fig. 2.
Fig. 5 is for showing the variation along with frequency, the situation of change of guide wavelength and the ratio of unloaded wavelength.Show among the figure that guide wavelength is with the variation of frequency under two kinds of different unloaded wavelength situations.
The response of the dual polarization waveguide detection system that waveguide realizes among the embodiment that Fig. 6 a, b, c and d relatively show with Fig. 1-6.Here, Fig. 6 a shows the variation of phase shift with frequency; Fig. 6 b shows the variation of insertion loss with frequency; Fig. 6 c return loss is with the variation of frequency; Fig. 6 d shows the variation of phase shift with frequency, and is similar to Fig. 6 a, but yardstick is bigger.
Fig. 7 a, b shows the circulator of the reflecting surface that has the another kind of distribution scheme in the waveguide cavity wall.
Fig. 8 a, b show the another kind of waveguide have a shade of difference the profile of differential phase shift part.
Fig. 9 is similar to Fig. 8 b, but its plane of reflection has projection to suppress to insert loss " low-frequency disturbance ".
Figure 10 a, 10b are not with the plane of reflection or stranded plane, only have the side and the longitudinal sectional drawing of the waveguide on differential phase shift plane.
The variation relation of waveguide shown in Figure 11 displayed map 10a and the 10b phase shift and frequency in frequency range.
The variation relation of loss and frequency is inserted in waveguide shown in Figure 12 displayed map 10a and the 10b in frequency range.
Figure 13 a, b is similar to Fig. 3, shows the longitudinal sectional drawing of waveguide, and this two waveguide has the plane of reflection of 5mm and 3mm respectively.
Figure 14,15 and 16 show the waveguide phase place of the 5mm of having shown in Figure 16 and the 3mm plane of reflection, the relation of insertion loss, return loss and frequency respectively.
At first with reference to Fig. 1, the low noise block receiver among Fig. 1 (totally by identification number 10 expressions) is adjusted with the technical approach of routine and is installed in the satellite earth antenna.As everyone knows, low noise block receiver 10 receives from the high frequency radiation signal of satellite antenna and handles and provides output signal, this output signal is presented to receiving the satellite receiver decoding unit successively (for clarity sake, not shown in the diagram) cable 12, piece receiver 10 comprises that waveguide 14 (for clear its inner member that shows, is partly cut open.) waveguide is the cylindricity metal.Waveguide front-ends have opening 16 towards satellite antenna to receive from horn antenna 18 ELECTROMAGNETIC RADIATION SIGNATURE of (dotted line shows, is installed in the front end of waveguide).Waveguide and horn antenna 18 are described just the same with International Patent Application PCT/GB96/00332 and WO92/22938 that the applicant provides.What therefore, be positioned at the same fore-and-aft plane of waveguide is first detector 20, reflection post 22 and second detector 24.In this embodiment, reflection post 22 runs through the waveguide internal diameter.Detector 20 and 24 passes waveguide cavity wall 26 along same fore-and-aft plane (identification number 28 expressions).Distance between first detector 20 and the reflection post 22 and the distance between the reflection post 22 and second detector are demarcated to λ/4, go into the wavelength for the input waveguide internal signal here.In the downstream away from the waveguide of front opening, the plane of reflection 30 is placed in the inside of waveguide.Clearlyer in Fig. 2 find out that the plane of reflection becomes miter angle with the plane at detector 20,24 and reflection post 22 places.The far-end of the plane of reflection is in chamber wall 32 places termination, thus the formation short-circuiting device, and this will be discussed in more detail below.
The plane of reflection is very thin as can be seen, and has the forward position 34 with the waveguide axis quadrature.Forward position 34 and the fixing apart distance of short-circuiting device 32.By this arrangement, just having only single transmitting side with chamber wall 32 at a distance of the forward position 30 of the plane of reflection of preset distance as can be seen,
With reference to figs. 2 to 4, two pairs of planes 36 and 38 have been cast on the inner chamber wall of waveguide.In Fig. 2, know and find out that two groups of planes 36 are parallel with the plane of reflection 30 with 38 among this embodiment.Plane 36 deeper is cast into the waveguide cavity wall than plane 38, and this waveguide has cross section profile shown in Figure 4 like this, and waveguide is here assembled to the bottom of the plane of reflection 30.These planes cause the asymmetric of cross section that the differential phase shift part can be provided.These planes with respect to the size relationship of reflecting surface (millimeter unit) as shown in Figure 3.
At work, enter waveguide 14 by horn antenna 18 and opening 16, and according to general knowledge, signal can be along waveguide 14 transmission from the signal of satellite antenna.The signal that satellite sends comprises two groups of signals of orthogonal polarization in the same wave band, represents (seeing as Fig. 1) with V1 and V2 respectively, is polarized in respectively in vertical and the horizontal plane.These two groups of planes can influence two groups of quadrature component V that describe below
2OAnd V
2PCut-off wavelength.The change of cut-off wavelength causes guide wavelength λ
gChange because following relation is arranged between them:
Wherein: λ
oBe unloaded wavelength;
λ
gBe guide wavelength;
λ
cBe cut-off wavelength.
Because V
2PAnd V
2OHave different guide wavelengths, therefore every just formation between them through a unit waveguide length synthesized phase shift.This phase shift is the function of frequency, and frequency is low more, and phase shift is big more.By Fig. 5 just as can be seen.Frequency is low more, and the difference between the wavelength is big more, because work as cut-off wavelength λ at front end
cNear λ
oThe time, λ
gJust trend is infinitely great.This phase shift is opposite with the phase shift drift that is produced by the plane of reflection with the drift of frequency.When signal during along waveguide, first detector 20 receives perpendicular polarization component V2.First detector distance reflection post, 22 quarter-waves, thus guarantee maximum space between them, and with the detector optimum Match.Detector 20 does not influence horizontal polarization signal V2, and V2 can continue along waveguide.
Because reflection post 22 be a vertical direction, the post reflection and continuing along waveguide so the V2 component can not be reflected is also because of same former thereby through second detector 24.When the front edge of horizontal polarization component V2 reflection and whirligig (beginning of the plane of reflection), signal will resolve into V
2PAnd V
2OComponent.The influence of reflecting surface makes V
2PComponent produces one with respect to V
2OThe phase shift of component, when signal runs into the plane of reflection, V
2PComponent is reflected by limit 34.The combination of the phase shift that the plane of reflection produces makes reflected signal V
2ORAnd V
2PRBetween have the phase differences of 180 degree at the starting end of the plane of reflection, they synthesize output signal V again
2R
Referring now to Fig. 6 a,, 6b, 6c and 6d.At first with reference to figure 6a, in the frequency range of Astra satellite 10.7-12.75GHz, circulator brings the phase shift drift of 180 degree as can be seen.Also as can be seen at whole frequency range internal reflection signal V
2PRWith respect to V
2ORAlways have 180 fixing degree phase shifts.Existing stranded plane scheme has substantial improvement among the application PCT/GB96/00332 that this method provides than the applicant.The response that prior art produces is at Fig. 6 a, and 6b dots among 6c and the 6d.This synthetic very good again and second detector plane that signal also is described effectively can produce good frequency response and insert loss.
For this consideration, referring to Fig. 6 b, the comparison between the insertion loss of the stranded plane of the disclosed described step scheme in the insertion loss of the circulator of 4 illustrated embodiments and the described application of Fig. 1 shown in the figure.As can be seen, it is more much smaller than the scheme that adopts prior art to insert loss and loss (representing with decibel), special bound at wave band.That is to say in these frequency ranges, to have good frequency response and signal response.
Fig. 6 c is signal return loss figure.As can be seen, compare, in whole frequency range, have less loss of signal, and the frequency range of minimum return loss is also wideer, general improvement is also just arranged in frequency range with the stranded plane of step scheme.
With reference to figure 6d, it is the enlarged drawing of Fig. 6 a.Here phase-shift characterisitc is steady substantially about 180 degree as can be seen, and is significantly improved than prior art scheme (dotting).
In some cases, loss can take place to insert in the narrow relatively wave band of several megahertzes.It is generally acknowledged that this is slight asymmetric the causing of bringing the stranded plane or the plane of reflection owing to manufacture deviation.A kind of solution is to place semi-cylindrical projection 40,42 (as shown in Figure 9) in stranded plane 30, so just is suppressed at receivable level inserting loss.These projections 40,42 are with the plane of reflection 30 castings.
Referring to Figure 10 a, 10b, 11 and 12, there is not the waveguide of the stranded plane or the plane of reflection shown in the figure.Figure 10 a and Figure 10 b waveguide as can be seen only have plane 46, otherwise just the same with waveguide shown in Figure 1.To having the waveguide of illustrated dimension, Figure 11 be presented at the frequency range of 10.7-12.75GHz in phase shift.Figure 12 shows the relation of inserting loss and return loss and frequency.This waveguide is enclosed with the applicant and is provided the waveguide of describing among the application PCT/GB96/00332 the same as can be seen from Figure 11 and 12, and work is good.
As an example, Figure 14,15 and 16 relatively same sizes waveguide the plane of reflection (being respectively 5 millimeters and 3 millimeters) of different length and shown in Figure 13 a, 13b the superiority under the plane situation of different length.5 millimeters device shifts out the high-end of frequency range and only brings slight mis-behave inserting the loss interference.
Can do different changes to the circulator device that uses in the waveguide mentioned above, and not depart from the scope of the present invention.For example, single parallel plane, two groups or more groups of planes can process on the wall of the chamber of waveguide shown in Fig. 7 a.In addition, the plane also needs not to be step, can provide by seamlessly transitting curve shown in Fig. 7 b.Simultaneously, the asymmetric of waveguide cross section can have variform, oval shown in Fig. 8 a or shown in Fig. 8 b wideer part intersect.Be appreciated that different along with signal specific and required frequency range, the accurate dimension of plane, easement curve and cross section and the size of the plane of reflection can be different.Be appreciated that also projection can have other shape that is fit to, also can be by single or a pair of the composition.They can be installed on the plane of reflection after device is cast.So-called " shape that is fit to " is meant and can suppresses any insertion loss that brings owing to the plane is asymmetric on the narrow wavestrip.Yet should be appreciated that basic invention is the combination of differential phase shift part in the plane of reflection and the waveguide limit, here, slight asymmetric skewing mechanism provides the differential phase shift part, thereby the quadrature component that second orthogonally polarized signal is reflected has different cut-off wavelengths, when synthesizing again, synthetic reflected signal has 180 stable degree phase shifts in required frequency range.
Can find out major advantage of the present invention be the reflection and the rotation scheme can be in existing satellite band Use LNB in the scope, but the high-low limit in frequency has better frequency characteristic. This just can Use more channel in the whole frequency band and have the performance of same stable, on the limit of frequency band Edge provides minimum decay. This scheme additional advantage can use exactly existing manufacturing technology and Do not need special material. Can find out that also this special equipment and method can be used for improving described The bandwidth of outer other frequency range of Astra frequency range.
Claims (23)
1. one kind is used for the waveguide that dual polarization waveguide detection system can receive two kinds of orthogonally polarized signals at least, and described waveguide has the waveguide that can receive and transmit at least two kinds of orthogonally polarized signals, it is characterized in that, this waveguide comprises:
Stretch to first detector of waveguide inside from the waveguide cavity wall, this detector is fit to receive described and its orthogonally polarized signal in same fore-and-aft plane;
From the reflector arrangement that the waveguide cavity wall stretches out, this reflector arrangement is positioned at the downstream direction of fore-and-aft plane first detector, and it returns first sniffer to the signal reflex in first orthogonal plane, and allows signal in described second orthogonal plane along waveguide; Be positioned at the downstream direction of described first reflector arrangement of described fore-and-aft plane, stretch to second sniffer of waveguide inside from the waveguide cavity wall; Signal reflex and whirligig, it is positioned at the downstream direction of second sniffer, the short-circuiting device that comprises the waveguide end, this short-circuiting device reflects back described second orthogonally polarized signal along waveguide, so that described second sniffer can receive the signal of this reflection and rotation; First reflection and the whirligig that described reflection and whirligig comprise, it is to have plane thereon, a forward position, it has at least one reflection limit part to reflect first component of second orthogonally polarized signal, has required distance between the short-circuiting device of this reflection limit part and waveguide end; One differential phase shift device near reflection plane, this differential phase shift device has slight asymmetric cross section, thereby make first and second components of described second orthogonally polarized signal partly have different separately phase shifts at differential phase shift, reflect back from described reflection limit part and short-circuiting device respectively then, when they partly transmit back again when synthetic further phase shift along differential phase shift; Described first and second components have different cut-off wavelengths, with the re-synthesizing signals that is provided for being detected by described second sniffer.
2. waveguide as claimed in claim 1 is characterized in that, reflection and whirligig have the single reflection limit part that runs through the waveguide Width.
3. as claim 1 and 2 described waveguides, it is characterized in that the differential phase shift device is produced by the asymmetrical unit that is cast in waveguide interior arrangement midplane.
4. waveguide as claimed in claim 3 is characterized in that, the both sides of waveguide have two planes, they abreast along waveguide from the reflector planar extension.
5. waveguide as claimed in claim 1 or 2 is characterized in that, slight asymmetrical unit is produced by oval-shaped waveguide.
6. as waveguide as described in the claim 4, it is characterized in that the surface of waveguide is goed deep into more than plane, downstream (first) in the plane, upstream, thereby and the plane, downstream form impedance-matching device.
7. as claim 3,4 or 6 described waveguides, it is characterized in that waveguide differential phase shift device is produced by two pairs of step planes at least.
8. as claim 1,2 or 5 described waveguides, it is characterized in that asymmetric part is produced by the smooth gradual change section along waveguide.
9. waveguide as claimed in claim 8 is characterized in that, the smooth gradual change section is parallel to the side that reflection limit part is cast in waveguide.
10. as the described waveguide of above-mentioned any one claim, it is characterized in that having a projection on the plane of reflection at least, to suppress to insert in the required frequency range interference of loss.
11. method, its first and second orthogonally polarized signal at least can receive frequency range, and can in same fore-and-aft plane, produce two kinds of outputs at least, thus in frequency range the steady location response characteristic of generation, it is characterized in that, said method comprising the steps of:
In described waveguide, provide first detector to receive first orthogonally polarized signal;
In described waveguide, provide and be parallel to first detector and at the reflection unit of its downstream direction, to reflect described first orthogonally polarized signal, by second orthogonally polarized signal;
In described waveguide, provide to be parallel to described reflector arrangement and at second detector of its downstream direction, this detector fully with the described second orthogonally polarized signal quadrature, thereby allow it see through and be not received;
End in waveguide provides signal reflex and whirligig, described second detector of the first component reflected back of described second orthogonally polarized signal.
Described short-circuiting device, it allows the second component of described second orthogonally polarized signal be transferred to the waveguide short device, and changes the amplitude of second component, thereby makes it to have different cut-off wavelengths with first component;
From described waveguide short device second component is reflected back;
Again first and second components of synthetic described second orthogonally polarized signal are to generate the reflected signal after synthesizing, thereby this reflected signal and described second detector are detected in same plane, described first and second reflecting components have complementary frequency characteristic, and synthetic back has frequency response stably in described frequency range.
12. method as claimed in claim 11 is characterized in that, this method comprises the step that forms reflection and whirligig by the combination differential phase shift part and the plane of reflection.
13., it is characterized in that having phase shift as claim 11 or 12 described methods by differential phase shift part and incoming signal being oriented between first and second components that miter angle makes orthogonal signalling.
14. as any one the described method in any claim 10 to 13, it is characterized in that, comprising Min. ground reduces the method that institute inserts the loss interference at frequency range providing projection on the stranded plane.
15. dual polarization waveguide detecting structure, it is characterized in that, described device comprises waveguide, first and second detectors that waveguide inside is isolated by first reflector, described first, second detector and reflector are in same plane, the signal generator of second detector provides polarization components to second detector, the signal generator of described second detector comprises that signal reflex and whirligig receive to give second detector with reflection and rotary polarization component, described reflection and whirligig comprise reflection limit part and the differential phase shift part of the slight asymmetric part generation of waveguide and the waveguide short device of reflection second component that reflects described polarized signal first component, this second component has the cut-off wavelength different with first component, first and second components have complementary frequency characteristic, when they are synthetic again, in frequency range, has frequency characteristic stably.
16. a waveguide that is used for dual polarization waveguide detection system is characterized in that it receives the signal of two kinds of orthogonal polarizations at least, this waveguide is made up of the waveguide that can receive and transmit two kinds of orthogonally polarized signals at least, and this waveguide comprises:
Stretch to first detector of waveguide inside from the waveguide cavity wall, described first detector is fit to receive the polarized signal of transmission in the same fore-and-aft plane,
The reflector arrangement that stretches out from the waveguide cavity wall, the downstream direction of its first detector in fore-and-aft plane, this reflector returns first sniffer to the signal reflex in the plane between first, allow signal in second orthogonal plane see through and along waveguide, be positioned at second sniffer of second orthogonal plane of the downstream direction of first reflector arrangement, be stretched over the inside of waveguide from the waveguide cavity wall, the signal reflex and the whirligig that comprise the short-circuiting device that is positioned at the waveguide end, it is at the second detector downstream direction, be used for receiving, rotate described second orthogonally polarized signal and this signal is reflected back along described waveguide, allow second sniffer receive the signal of process rotation and reflection, described signal reflex and whirligig also comprise the differential phase shift device between second detector and short-circuiting device, this differential phase shift device has slight asymmetric cross section, therefore in the differential phase shift part, first and second components of described second orthogonally polarized signal have different phase shifts, then take place by differential phase shift part further phase shift be used for synthetic before, reflect from described short-circuiting device respectively, described first and second components have different cut-off wavelengths, for described second sniffer provides recombination signal.
17. waveguide as claimed in claim 16 is characterized in that, the differential phase shift device is produced by the asymmetrical unit on the plane that is cast in waveguide assembly inside.
18. waveguide as claimed in claim 17 is characterized in that, two planes are positioned at two sides of waveguide, are parallel to waveguide, and extend from the reflector plane along waveguide.
19. as claim 16 or 17 described waveguides, it is characterized in that, provide by elliptical guide to produce slight asymmetric part.
20. waveguide as claimed in claim 18 is characterized in that, the surface of waveguide is more goed deep into than plane, downstream (first) in the plane, upstream, thereby forms impedance-matching device with the plane, downstream.
21., it is characterized in that waveguide differential phase shift device is produced by two groups of step planes at least as claim 17,18 or 20 described waveguides.
22. as claim 16,17 or 19 described waveguides, it is characterized in that, asymmetric by smooth gradual change section generation along waveguide.
23. waveguide as claimed in claim 22 is characterized in that, the smooth gradual change section is parallel to the reflection limit and casts in part on the side of waveguide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9618744.8 | 1996-09-09 | ||
| GBGB9618744.8A GB9618744D0 (en) | 1996-09-09 | 1996-09-09 | Improved waveguide for use in dual polarisation probe system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1232577A true CN1232577A (en) | 1999-10-20 |
Family
ID=10799613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97198506 Pending CN1232577A (en) | 1996-09-09 | 1997-09-09 | Improved waveguide for use in dual polarisation probe system |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0935821B1 (en) |
| CN (1) | CN1232577A (en) |
| AU (1) | AU4214097A (en) |
| DE (1) | DE69722950T8 (en) |
| GB (1) | GB9618744D0 (en) |
| WO (1) | WO1998010479A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112385088A (en) * | 2018-04-27 | 2021-02-19 | 上海诺基亚贝尔股份有限公司 | Dual-band polarizer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9900411D0 (en) | 1999-01-08 | 1999-02-24 | Cambridge Ind Ltd | Multi-frequency antenna feed |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3020514A1 (en) * | 1980-05-30 | 1981-12-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | AERIAL FEEDING SYSTEM FOR A TRACKABLE AERIAL |
| GB9113090D0 (en) * | 1991-06-18 | 1991-08-07 | Cambridge Computer | Dual polarisation waveguide probe system |
| JPH07321502A (en) * | 1994-05-20 | 1995-12-08 | Fujitsu General Ltd | Primary radiator for linearly polarized wave |
| JP2636750B2 (en) * | 1994-09-12 | 1997-07-30 | 日本電気株式会社 | Quadrature polarization splitter |
| JPH08125403A (en) * | 1994-10-20 | 1996-05-17 | Fujitsu General Ltd | Primary radiator |
-
1996
- 1996-09-09 GB GBGB9618744.8A patent/GB9618744D0/en active Pending
-
1997
- 1997-09-09 CN CN 97198506 patent/CN1232577A/en active Pending
- 1997-09-09 DE DE69722950T patent/DE69722950T8/en not_active Expired - Fee Related
- 1997-09-09 WO PCT/GB1997/002428 patent/WO1998010479A1/en active IP Right Grant
- 1997-09-09 AU AU42140/97A patent/AU4214097A/en not_active Abandoned
- 1997-09-09 EP EP97940233A patent/EP0935821B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112385088A (en) * | 2018-04-27 | 2021-02-19 | 上海诺基亚贝尔股份有限公司 | Dual-band polarizer |
| CN112385088B (en) * | 2018-04-27 | 2022-06-10 | 上海诺基亚贝尔股份有限公司 | Dual-band polarizer |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9618744D0 (en) | 1996-10-23 |
| EP0935821A1 (en) | 1999-08-18 |
| DE69722950D1 (en) | 2003-07-24 |
| AU4214097A (en) | 1998-03-26 |
| DE69722950T8 (en) | 2004-09-16 |
| EP0935821B1 (en) | 2003-06-18 |
| WO1998010479A1 (en) | 1998-03-12 |
| DE69722950T2 (en) | 2004-05-13 |
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