CN204947051U - A kind of miniaturized cross-connect with filter function - Google Patents
A kind of miniaturized cross-connect with filter function Download PDFInfo
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- CN204947051U CN204947051U CN201520662545.9U CN201520662545U CN204947051U CN 204947051 U CN204947051 U CN 204947051U CN 201520662545 U CN201520662545 U CN 201520662545U CN 204947051 U CN204947051 U CN 204947051U
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Abstract
The utility model discloses a kind of miniaturized cross-connect with filter function, comprises upper-layer micro-strip structure, interlayer substrate and lower floor's grounding plate.Upper-layer micro-strip structure is made up of middle cross resonator and four couple feed parts.This circuit has horizontal and vertical two transmission paths, transmits low frequency and high-frequency signal respectively, and achieves passing crosswise of two paths of signals in the plane and be independent of each other.The capable minor matters of amounting to of two E that cross resonator adds are for regulating high frequency pass band.Two ports in lateral transport path are made up of the quarter-wave transmission line of two half-wavelength feed lines and a terminal short circuit.Two port sections of longitudinal transmission path are made up of two couple feed lines, have good isolation between two transmission paths.It is high that the utility model has filtering selectivity, and the isolation bandwidth between different frequency transmission path is very wide, and size is little, and plane is easy to the feature realized.
Description
Technical field
The utility model relates to a kind of miniaturized cross-connect with filter function, can be applicable to the cross-connect of radio-frequency (RF) front-end circuit band filter function, can be the antenna array feed of different frequency.
Background technology
Cross-connect is the basic passive device of one in antenna feeding network and microstrip circuit, and the microwave transmission line signal that transmitting two paths is different respectively that its allows two-way to intersect, also needs the high isolation performance ensured each other under low-loss prerequisite.In the middle of the Butter matrix application of aerial array, because two paths of signals inevitably intersects, the use of cross-linked device and the quality of performance thereof all seem particularly important.
In nearly ten years, have much about the research of cross-connect.Realize single-pass band cross-connect with twin nuclei and realize dual-passband cross-connect from initial to strip lines configuration, banded coupler structure or variable capacitance diode.Above-mentioned dual-passband cross-connect design or only have single-frequency point to isolate, or isolation bandwidth is limited.Connect circular patch with toroidal cavity resonator and can widen isolation bandwidth, its cost is that size is larger.Then be difficult to planar circuit integrated with the cross-connect that waveguide or 3 dimension sandwich constructions realize.In order to improve the shortcoming of above-mentioned cross-connect, the utility model proposes a kind of novel miniaturized cross-connect with filter function.
Utility model content
The purpose of this utility model is to overcome prior art above shortcomings, proposes a kind of miniaturized cross-connect with filter function.In the utility model, cross-connect can realize on planar microstrip, effectively utilizes the wide isolation bandwidth that resonator and port transmission linearly can realize between two transmission paths.Simultaneously because overall microstrip design is compact, the structure proposed has less size, circuit of being more convenient for integrated.
For realizing the utility model object, the technical scheme that the utility model adopts is as follows.
Have a miniaturized cross-connect for filter function, comprise upper-layer micro-strip structure, interlayer substrate and lower floor's grounding plate, upper-layer micro-strip structure and lower floor's grounding plate are attached to the upper and lower surface of interlayer substrate respectively; Upper-layer micro-strip structure comprises additional two E shapes and amounts to the cross resonator of minor matters and the port section of four couple feed, wherein low frequency signal is coupled on cross resonator by half-wavelength feed line by the input port of left side low frequency signal, by way of lateral transport path, on the quarter-wave transmission line being coupled to terminal short circuit and half-wavelength feed line, finally export at right side output port; High-frequency signal is coupled on cross resonator by transmission line by the input port of top high-frequency signal, by way of longitudinal transmission path, is coupled to lower output mouth and exports; Cross resonator comprises the transmission path of two horizontal and vertical different frequency signals; During transverse resonance device resonance in cross resonator, point of intersection is this resonator respective frequencies point
f l voltage's distribiuting zero point, longitudinal resonator is carried in this point to this frequency
f l impact can ignore; During longitudinal resonator resonance in cross resonator, point of intersection is this resonator respective frequencies point
f h voltage's distribiuting zero point, longitudinal resonator is carried in this point to this frequency
f h impact can ignore, realize horizontal and vertical height resonant frequency signal transmission time non-interference; The half of the longitudinal resonator of one half-sum of the transverse resonance device in cross resonator constitutes a half-wave resonator, the resonance frequency of a corresponding public mode of resonance
f m ,
f m be positioned at
f l with
f h between can produce a transmission zero by way of the half-wavelength feeding transmission line of lateral transport path input/output terminal, transmission zero frequency is positioned at
f l with
f h between and equal
f m , can public mode of resonance be suppressed
f m propagation, this transmission zero achieves the isolation between adjacent port signal, also improves the filtering performance of circuit.
Further, be positioned at middle cross resonator to amount to minor matters by a transverse resonance device, a longitudinal resonator and two E shapes and form; Wherein transverse resonance device is the microstrip line connected to form by the first microstrip line, the second microstrip line, the 3rd microstrip line, the 4th microstrip line and the 5th microstrip line, second microstrip line, the 3rd microstrip line all have one end to be connected with one end of the first microstrip line, and the 4th microstrip line is connected with the other end of the first microstrip line with the 5th even one end of microstrip line; Longitudinal resonator is the microstrip line connected to form by the 6th microstrip line, the 7th microstrip line, the 8th microstrip line, the 9th microstrip line, the tenth microstrip line and the 11 microstrip line, 6th microstrip line, the 7th microstrip line are located along the same line, and the 8th microstrip line, the 9th microstrip line all have one end to be connected with one end of the 6th microstrip line, the tenth microstrip line and the 11 microstrip line all have one end to be connected with the 7th microstrip line; It is the microstrip lines connected to form in turn by the 12 microstrip line, the 13 microstrip line, the 14 microstrip line, the 15 microstrip line, the 16 microstrip line and the 17 microstrip line that one of them E shape amounts to minor matters; It is the microstrip lines connected to form in turn by the 18 microstrip line, the 19 microstrip line, the 20 microstrip line, the 21 microstrip line, the 22 microstrip line and the 23 microstrip line that another E shape amounts to minor matters; Low frequency signal input port part connects a half-wavelength transmission line by first input end mouth and forms, and this half-wavelength transmission line is the microstrip line connected to form in turn by the 24 microstrip line, the 25 microstrip line, the 26 microstrip line, the 27 microstrip line and the 28 microstrip line; The quarter-wave transmission line that low frequency signal output port part connects a half-wavelength transmission line and a terminal short circuit by the first output port forms, this half-wavelength transmission line is the microstrip line connected to form in turn by the 29 microstrip line, the 30 microstrip line, the 31 microstrip line, the 32 microstrip line and the 33 microstrip line, and the quarter-wave transmission line of this terminal short circuit refers to the 34 microstrip line and it is connected with lower metal plate through interlayer plate by a metallization via hole; High-frequency signal input port part connects a coupled transmission line by the second input port and forms, and this coupled transmission line is the microstrip line connected to form in turn by the 35 microstrip line, the 36 microstrip line, the 37 microstrip line, the 38 microstrip line and the 39 microstrip line; High-frequency signal output port part connects a coupled transmission line by the second output port and forms, and this coupled transmission line is the microstrip line connected to form in turn by the 40 microstrip line, the 41 microstrip line, the 42 microstrip line, the 43 microstrip line and the 44 microstrip line.
Further, in cross resonator, the microstrip line equivalent length of transverse resonance device is low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/2nd; The microstrip line equivalent length of the longitudinal resonator in cross resonator is high-frequency signal resonance frequency
f h corresponding wavelength
λ h 1/2nd.
Further, two additional on cross resonator E shapes amount to minor matters for regulating the bandwidth of high frequency pass band.
Further, two E shapes additional on cross resonator amount to the size that the measures such as the bending of minor matters and feed line can reduce circuit greatly, and the generation of transmission zero achieves the Combined design of filter and cross-linked device.The above-mentioned miniaturized cross-connect with filter function, cross resonator transverse resonance device Microstrip Length is equivalent to low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/2nd; The longitudinal resonator Microstrip Length of cross resonator is equivalent to high-frequency signal resonance frequency
f h corresponding wavelength
λ h 1/2nd; The horizontal and vertical path-length of cross resonator is different, thus can realize the transmission of different height frequency signal.
Further, the length of transmission line of the terminal short circuit of low frequency output notch portion is equivalent to low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/4th, be conducive to expanding the bandwidth of low frequency pass band.
Further, the half-wavelength transmission line length of low frequency input/output terminal notch portion is equivalent to the half-wavelength corresponding to transmission zero frequency, and wherein transmission zero frequency is positioned at
f l with
f h between, this transmission zero effectively achieves the input/output port isolation of low-and high-frequency signal.
Relative to prior art, the utility model tool has the following advantages and technique effect:
(1) cross-connect allows different frequency signals pass through and have filtering performance, and the isolation performance between two paths of signals is good.
(2) cross-connect adopts planar microstrip structure, is equivalent to the filter that a traditional cross-linked device is integrated with two different frequencies, is easy to that planar circuit is integrated and circuit size is little.
Accompanying drawing explanation
Fig. 1 is the structure chart with filter function right-angled intersection connector;
Fig. 2 is the schematic diagram with filter function right-angled intersection connector;
Fig. 3 is emulation and the actual measurement transfer curve figure of low frequency pass band;
Fig. 4 is emulation and the actual measurement transfer curve figure of high frequency pass band;
Fig. 5 is emulation between low frequency port and high frequency port and actual measurement isolation characteristic curve chart.
Specific embodiments
Below in conjunction with accompanying drawing, the utility model is described in further detail, but the claimed scope of the utility model is not limited to the scope of lower example statement.
As shown in Figure 1, the right-angled intersection connector with filter function comprises upper-layer micro-strip structure, interlayer substrate and lower floor's grounding plate, and upper-layer micro-strip structure is attached to interlayer plate upper surface, and interlayer plate lower surface is grounded metal; Upper-layer micro-strip structure comprises additional two E shapes and amounts to the cross resonator of minor matters and the port section of four couple feed; Cross resonator comprises the transmission path of two horizontal and vertical different frequency signals; Low frequency signal is coupled on cross resonator by half-wavelength transmission line by the input port I/P1 of left side low frequency signal, by way of lateral transport path, on the quarter-wave transmission line being coupled to terminal short circuit and half-wavelength transmission line, finally export at right side output port O/P2; High-frequency signal is coupled on cross resonator by transmission line by the input port I/P3 of top high-frequency signal, by way of longitudinal transmission path, is coupled to lower output mouth O/P4 and exports.
As shown in Figure 1, be positioned at middle cross resonator to amount to minor matters by a transverse resonance device, a longitudinal resonator and two E shapes and form; Wherein transverse resonance device is the microstrip line of two ends, the left and right open circuit connected to form by the first microstrip line 1, second microstrip line 16, the 3rd microstrip line 17, the 4th microstrip line 18 and the 5th microstrip line 19; Longitudinal resonator is the microstrip line of the open circuit of two ends up and down connected to form by the 6th microstrip line 2, the 7th microstrip line 3, the 8th microstrip line 20, the 9th microstrip line 21, the tenth microstrip line the 22 and the 11 microstrip line 23; It is the microstrip lines connected to form successively by the 12 microstrip line the 4, the 13 microstrip line the 5, the 14 microstrip line the 6, the 15 microstrip line the 7, the 16 microstrip line the 8 and the 17 microstrip line 9 that one of them E shape amounts to minor matters; It is the microstrip lines connected to form successively by the 18 microstrip line the 10, the 19 microstrip line the 11, the 20 microstrip line the 12, the 21 microstrip line the 13, the 22 microstrip line the 14 and the 23 microstrip line 15 that another E shape amounts to minor matters; Low frequency signal input port part connects a half-wavelength transmission line by first input end mouth I/P1 and forms, and this half-wavelength transmission line is the microstrip line connected to form by the 24 microstrip line the 24, the 25 microstrip line the 25, the 26 microstrip line the 26, the 27 microstrip line the 27 and the 28 microstrip line 28; The quarter-wave transmission line that low frequency signal output port part connects a half-wavelength transmission line and a terminal short circuit by the first output port O/P2 forms, this half-wavelength transmission line is the microstrip line connected to form by the 29 microstrip line the 30, the 30 microstrip line the 31, the 31 microstrip line the 32, the 32 microstrip line the 33 and the 33 microstrip line 34, and the quarter-wave transmission line of this terminal short circuit refers to the 34 microstrip line 29 and its upper end is connected with lower metal plate through interlayer plate by a metallization via hole 45; High-frequency signal input port part connects a coupled transmission line by the second input port I/P3 and forms, and this coupled transmission line is the microstrip line connected to form by the 35 microstrip line the 35, the 36 microstrip line the 36, the 37 microstrip line the 37, the 38 microstrip line the 38 and the 39 microstrip line 39; High-frequency signal output port part connects a coupled transmission line by the second output port O/P4 and forms, and this coupled transmission line is the microstrip line connected to form by the 40 microstrip line the 40, the 41 microstrip line the 41, the 42 microstrip line the 42, the 43 microstrip line the 43 and the 44 microstrip line 44; Cross resonator transverse resonance device Microstrip Length is equivalent to low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/2nd; The longitudinal resonator Microstrip Length of cross resonator is equivalent to high-frequency signal resonance frequency
f h corresponding wavelength
λ h 1/2nd; The length of transmission line of the terminal short circuit of low frequency output notch portion is equivalent to low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/4th.
As shown in Fig. 2 right-angled intersection connector schematic diagram, each dimension of microstrip line parameter is as follows:
l 1 =11.2 ± 0.05mm,
l 2 =4.6 ± 0.05mm,
l 3 =3.0 ± 0.05mm,
l 4 =8.2 ± 0.05mm,
l 5 =4.8 ± 0.05mm,
l 6 =4.5 ± 0.05mm,
l 7 =2.8 ± 0.05mm,
l 8 =16.7 ± 0.05mm,
l 9 =25.2 ± 0.05mm,
l 10 =5.8 ± 0.05mm,
w 1 =1.56 ± 0.02mm,
w 2 =0.8 ± 0.02mm,
w 3 =0.8 ± 0.02mm,
w 4 =0.4 ± 0.02mm,
w 5 =0.3 ± 0.02mm,
g 1 =0.25 ± 0.01mm,
g 2 =0.2 ± 0.01mm,
g 3 =0.15 ± 0.01mm.
The impedance of each input/output port can be undertaken regulating to reach coupling by the stiffness of coupling between change resonator and port position.As four ports of Fig. 1, wherein the input impedance of input port I/P1 and I/P3 is 50 ohm, and the output impedance of output port O/P2 and O/P4 is also 50 ohm.Fig. 3, Fig. 4 and Fig. 5 comprise self and mutual amplitude simulated response of each input/output port of this right-angled intersection connector respectively.
Embodiment
Have the structure chart of the right-angled intersection connector of filter function as shown in Figure 1, regarding sizes specification as shown in Figure 2.The thickness of medium substrate is 0.81mm, and relative dielectric constant is 3.38.
Fig. 3 is emulation and the actual measurement transfer curve figure that of designing according to above-mentioned parameter has the low frequency pass band of the right-angled intersection connector of filter function; Transverse axis in transfer curve way represents frequency, and the longitudinal axis represents transmission characteristic, wherein S
11represent the return loss of first input end mouth I/P1, S
21represent the insertion loss of port I/P1 to port O/P2; From emulating and measured result, low frequency pass band centre frequency, at 2GHz, is-0.29dB at the actual measurement insertion loss of center frequency point, and actual measurement return loss is-26dB, and respectively there is a transmission zero on passband both sides, effectively improve the roll-off characteristic of filter function.Fig. 4 is the emulation with the high frequency pass band of the right-angled intersection connector of filter function and actual measurement transfer curve figure, wherein S that design according to above-mentioned parameter
33represent the return loss of the second input port I/P3, S
43represent the insertion loss of port I/P3 to port O/P4; From emulating and measured result, high frequency pass band centre frequency, at 2.45GHz, is-0.22dB at the actual measurement insertion loss of center frequency point, and actual measurement return loss is-19dB, and passband has a transmission zero.Fig. 5 is the emulation between the low frequency port with the right-angled intersection connector of filter function and high frequency port and actual measurement isolation characteristic curve chart that design according to above-mentioned parameter, S
31represent the isolating coefficient of the second input port I/P3 and first input end mouth I/P1, visible low frequency pass band and high frequency pass band and between the isolating coefficient of frequency range all below-20dB, embody the isolation performance that two frequency ranges are good.
The emulation measured result of embodiment all shows the utility model device, not only can realize the function of right-angled intersection transmission two-frequency signal, and isolation performance between two transmission paths is good.
The foregoing is only preferred embodiments of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (4)
1. one kind has the miniaturized cross-connect of filter function, it is characterized in that: comprise upper-layer micro-strip structure, interlayer substrate and lower floor's grounding plate, upper-layer micro-strip structure and lower floor's grounding plate are attached to the upper and lower surface of interlayer substrate respectively; Upper-layer micro-strip structure comprises additional two E shapes and amounts to the cross resonator of minor matters and the port section of four couple feed, wherein low frequency signal is coupled on cross resonator by half-wavelength feed line by the input port of left side low frequency signal, by way of lateral transport path, on the quarter-wave transmission line being coupled to terminal short circuit and half-wavelength feed line, finally export at right side output port; High-frequency signal is coupled on cross resonator by transmission line by the input port of top high-frequency signal, by way of longitudinal transmission path, is coupled to lower output mouth and exports; Cross resonator comprises the transmission path of two horizontal and vertical different frequency signals; During transverse resonance device resonance in cross resonator, point of intersection is this resonator respective frequencies point
f l voltage's distribiuting zero point, longitudinal resonator is carried in this point to this frequency
f l impact can ignore; During longitudinal resonator resonance in cross resonator, point of intersection is this resonator respective frequencies point
f h voltage's distribiuting zero point, longitudinal resonator is carried in this point to this frequency
f h impact can ignore, realize horizontal and vertical height resonant frequency signal transmission time non-interference; The half of the longitudinal resonator of one half-sum of the transverse resonance device in cross resonator constitutes a half-wave resonator, the resonance frequency of a corresponding public mode of resonance
f m ,
f m be positioned at
f l with
f h between can produce a transmission zero by way of the half-wavelength feeding transmission line of lateral transport path input/output terminal, transmission zero frequency is positioned at
f l with
f h between and equal
f m , this transmission zero achieves the isolation between adjacent port signal.
2. there is the miniaturized cross-connect of filter function according to claim 1, it is characterized in that being positioned at middle cross resonator and amount to minor matters by a transverse resonance device, a longitudinal resonator and two E shapes and form, wherein transverse resonance device is the microstrip line connected to form by the first microstrip line (1), the second microstrip line (16), the 3rd microstrip line (17), the 4th microstrip line (18) and the 5th microstrip line (19), second microstrip line (16), the 3rd microstrip line (17) all have one end to be connected with one end of the first microstrip line (1), and the 4th microstrip line (18) is evenly connected with the other end of the first microstrip line (1) one end with the 5th microstrip line (19), longitudinal resonator is the microstrip line connected to form by the 6th microstrip line (2), the 7th microstrip line (3), the 8th microstrip line (20), the 9th microstrip line (21), the tenth microstrip line (22) and the 11 microstrip line (23), 6th microstrip line (2), the 7th microstrip line (3) are located along the same line, and the 8th microstrip line (20), the 9th microstrip line (21) all have one end to be connected with one end of the 6th microstrip line (2), the tenth microstrip line (22) and the 11 microstrip line (23) all have one end to be connected with the 7th microstrip line (3), it is the microstrip lines connected to form in turn by the 12 microstrip line (4), the 13 microstrip line (5), the 14 microstrip line (6), the 15 microstrip line (7), the 16 microstrip line (8) and the 17 microstrip line (9) that one of them E shape amounts to minor matters, it is the microstrip lines connected to form in turn by the 18 microstrip line (10), the 19 microstrip line (11), the 20 microstrip line (12), the 21 microstrip line (13), the 22 microstrip line (14) and the 23 microstrip line (15) that another E shape amounts to minor matters, low frequency signal input port part connects a half-wavelength transmission line by first input end mouth (I/P1) and forms, and this half-wavelength transmission line is the microstrip line connected to form in turn by the 24 microstrip line (24), the 25 microstrip line (25), the 26 microstrip line (26), the 27 microstrip line (27) and the 28 microstrip line (28), the quarter-wave transmission line that low frequency signal output port part connects a half-wavelength transmission line and a terminal short circuit by the first output port (O/P2) forms, this half-wavelength transmission line is by the 29 microstrip line (30), 30 microstrip line (31), 31 microstrip line (32), the microstrip line that 32 microstrip line (33) and the 33 microstrip line (34) connect to form in turn, the quarter-wave transmission line of this terminal short circuit refers to the 34 microstrip line (29) and it is connected with lower metal plate through interlayer plate by metallization via hole (45), high-frequency signal input port part connects a coupled transmission line by the second input port (I/P3) and forms, and this coupled transmission line is the microstrip line connected to form in turn by the 35 microstrip line (35), the 36 microstrip line (36), the 37 microstrip line (37), the 38 microstrip line (38) and the 39 microstrip line (39), high-frequency signal output port part connects a coupled transmission line by the second output port (O/P4) and forms, and this coupled transmission line is the microstrip line connected to form in turn by the 40 microstrip line (40), the 41 microstrip line (41), the 42 microstrip line (42), the 43 microstrip line (43) and the 44 microstrip line (44).
3. the miniaturized cross-connect with filter function according to claim 1, is characterized in that the microstrip line equivalent length of transverse resonance device in cross resonator is low frequency signal resonance frequency
f l corresponding wavelength
λ l 1/2nd; The microstrip line equivalent length of the longitudinal resonator in cross resonator is high-frequency signal resonance frequency
f h corresponding wavelength
λ h 1/2nd.
4. there is the miniaturized cross-connect of filter function according to claim 1, it is characterized in that two E shapes additional on cross resonator amount to minor matters for regulating the bandwidth of high frequency pass band.
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| CN201520662545.9U CN204947051U (en) | 2015-08-27 | 2015-08-27 | A kind of miniaturized cross-connect with filter function |
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|---|---|---|---|
| CN201520662545.9U CN204947051U (en) | 2015-08-27 | 2015-08-27 | A kind of miniaturized cross-connect with filter function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070998A (en) * | 2015-08-27 | 2015-11-18 | 华南理工大学 | Miniaturized cross connector with filtering function |
| CN110459846A (en) * | 2019-07-17 | 2019-11-15 | 安徽蓝讯电子科技有限公司 | A kind of waveguide filter of the high degree of suppression of broadband |
-
2015
- 2015-08-27 CN CN201520662545.9U patent/CN204947051U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070998A (en) * | 2015-08-27 | 2015-11-18 | 华南理工大学 | Miniaturized cross connector with filtering function |
| CN105070998B (en) * | 2015-08-27 | 2018-05-15 | 华南理工大学 | A kind of miniaturization cross-connect with filter function |
| CN110459846A (en) * | 2019-07-17 | 2019-11-15 | 安徽蓝讯电子科技有限公司 | A kind of waveguide filter of the high degree of suppression of broadband |
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Granted publication date: 20160106 Termination date: 20180827 |