CN104577287A - Harmonic suppression broadband patch coupler and method of adjusting power-dividing ratio and method of simultaneously achieving suppression broadband and second harmonics - Google Patents
Harmonic suppression broadband patch coupler and method of adjusting power-dividing ratio and method of simultaneously achieving suppression broadband and second harmonics Download PDFInfo
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- CN104577287A CN104577287A CN201510035102.1A CN201510035102A CN104577287A CN 104577287 A CN104577287 A CN 104577287A CN 201510035102 A CN201510035102 A CN 201510035102A CN 104577287 A CN104577287 A CN 104577287A
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Abstract
The invention relates to a harmonic suppression broadband patch coupler and a method of adjusting power-dividing ratio and a method of simultaneously achieving suppression of broadband and second harmonics. According to the structure, the harmonic suppression broadband patch coupler comprises a fan-shaped patch layer, a top layer dielectric substrate, an electromagnetism band-gap layer, a bottom layer dielectric substrate and a metal ground layer, wherein the fan-shaped patch layer, the top layer dielectric substrate, the electromagnetism band-gap layer, the bottom layer dielectric substrate and the metal ground layer are arranged in sequence from top to bottom, the fan-shaped patch layer comprises two fan-shaped patch sets with different radiuses and same central angle of 90 degrees, two fan-shaped patches of each fan-shaped patch set are symmetrical about an origin. An output end opening is arranged between the two fan-shaped patches; the electromagnetism band-gap layer is provided with N*N rectangular good conductor patches arranged in array, and the N is a positive integer which is equal to or bigger than 2; the center, corresponding to the rectangular good conductor patches, of the bottom layer dielectric substrate is provided with metal via holes, the metal via holes penetrate through the bottom layer dielectric substrate, and the metal via holes are connected with the rectangular good conductor patches and the metal ground layer respectively. Output of any one power-dividing ratio of the broadband and the second harmonics suppression function can be simultaneously achieved.
Description
Technical field
The present invention relates to the coupler used in microwave communication, particularly a kind of any merit that simultaneously can realize broadband and second harmonic suppression divides the harmonics restraint wideband patch coupler of specific output.
Background technology
Coupler is the directive power divider of a kind of tool, it can from the forward wave of main transmission system according to different proportion power division to coupled end.In the feeding network of power gain controller part, balance amplifier, modulation-demodulation circuit, phased array radar system, all need to use coupler.
Nowadays the method being used for realizing broadband and harmonics restraint mainly contains following several:
One is design a kind of structure based on the orthocoupler of paster structure, and realize the expansion of bandwidth, it is 90 ° by four central angles, and the fan-shaped metal patch that radius is adjustable is formed.But this design cannot simultaneously the passing through of harmonic inhabitation.
Two is design a kind of structure based on the branch line coupler of electro-magnetic bandgap, realizes the inhibit feature of harmonic wave.Due to the existence of Slow-wave effect, the size of this design is also reduced further.But this design sacrifices the bandwidth of coupler.
Three is a kind of couplers using lump original paper band to hinder resonator of design, because band resistance resonator itself possesses harmonic restraining function, by using band resistance resonator to realize high pass required for harmonics restraint and low-pass characteristic in coupler, realize the function of harmonics restraint.
Four is Low ESR microstrip lines of use one section of coupling line partial insertion conventional coupler, due to the intrinsic asymmetry in odd harmonic, can realize the harmonics restraint of coupler.
But the research of any output work proportion by subtraction coupler of above broadband and harmonics restraint singlely can only realize one of broadband or harmonic restraining function, fail realize both simultaneously and meet any merit proportion by subtraction output function.Therefore, need a kind ofly to realize broadband and second harmonic suppresses and exports the coupler structure of any merit proportion by subtraction simultaneously.
Summary of the invention
The object of the invention is to overcome the deficiency existed in above-mentioned prior art structure, and provide a kind of simple and reasonable for structure, the harmonics restraint wideband patch coupler of any centimetre specific output of broadband and second harmonic inhibit feature can be realized simultaneously.
The object of the present invention is achieved like this:
A kind of harmonics restraint wideband patch coupler, is characterized in that, comprise fan-shaped patch layer, top layer medium substrate, electromagnetic belt gap layer, underlying dielectric substrate and the metal ground layer of arranging successively from top to bottom; Described fan-shaped patch layer comprises the fan-shaped paster group that HBV"liang dui ban" footpath small one and large one and central angle are 90 °, and two fan-shaped pasters of every a pair fan-shaped paster group are with origin symmetry.Output port is provided with between adjacent two fan-shaped pasters; Described electromagnetic belt gap layer arranged in arrays has N*N rectangle good conductor paster, N be more than or equal to 2 positive integer; The center of described underlying dielectric substrate corresponding rectangle good conductor paster is provided with metallic vias, and metallic vias runs through underlying dielectric substrate and is connected with rectangle good conductor paster and metal ground layer respectively.
Above-mentioned two is adjustable to the radius of fan-shaped paster group totally four fan-shaped pasters, and central angle is 90 °, in order to realize basic orthocoupler function.Rectangle good conductor paster and metallic vias form mushroom-shaped structure jointly, in order to realize broadband and the second harmonic inhibit feature of institute's proposition coupler simultaneously.Immediately below the home position being centrally located at rectangle good conductor paster of described mushroom-shaped structure, whole coupler is suppressed by top layer dielectric substrate and underlying dielectric substrate and is formed, thus realizes broadband and the second harmonic inhibit feature of institute's proposition coupler simultaneously.The present invention proposes one first can realize broadband and second harmonic suppression simultaneously, and exports the paster coupler of any merit proportion by subtraction, greatly reduces different cost and the complexity requiring coupler of design.Can be used for the wireless communication systems such as C-band satellite television broadcasting and very small aperture terminal.
Above-mentioned fan-shaped patch layer comprises the fan-shaped paster group that HBV"liang dui ban" footpath small one and large one and central angle are 90 °, two fan-shaped pasters of every a pair fan-shaped paster group are with origin symmetry, that is paster coupler comprises HBV"liang dui ban" footpath and not to wait and its central angle is equal to four fan-shaped compositions of 90 °, radius is equal fan-shaped with origin symmetry and radius is adjustable, to change energy drag scale, thus affect port merit and divide specific output.Described fan-shaped radius joint effect coupler operating frequency, coupler operating frequency can reduce along with the increase of fan-shaped radius.
Described mushroom-shaped structure is a kind of electromagnetic bandgap structure, and the signal for characteristic frequency has stopband effect, thus realizes the inhibit feature of second harmonic.In addition, its Slow-wave effect produced ensure that proposed coupler size does not strengthen further.Due to the intervention of top layer medium substrate (second layer dielectric substrate), carry out impedance matching for fan-shaped patch layer (paster coupler), thus realize broadband feature.
Object of the present invention can also adopt following technical measures to solve:
As a kind of scheme more specifically, the output port of described fan-shaped patch layer is provided with four, and each output port is connected to 50 ohm microstrip.
Described N is 4 or 5.
Described two is not the first fan-shaped paster group and the second fan-shaped paster group to fan-shaped patch components, and in the first fan-shaped paster group, the radius R 1 of fan-shaped paster is 4.9mm, R2 is 6.6mm, and in the second fan-shaped paster group, the radius R 1 of fan-shaped paster is 1.3mm, R2 is 4.9mm.By adjusting the radius size of fan-shaped paster, realizing any merit at any single frequency and dividing specific output.
Described rectangle good conductor paster is the square that the length of side is Wp, and in the first fan-shaped paster group, the Wp of fan-shaped paster is 2.8mm, and in the second fan-shaped paster group, the Wp of fan-shaped paster is 2.6mm, and in two fan-shaped paster groups, between rectangle good conductor paster, clearance G is 0.8mm.
The radius R v of described metallic vias is 0.25mm
Described rectangle good conductor paster and metallic vias connect and compose mushroom-shaped structure, and the thickness after rectangle good conductor paster is connected with metallic vias equals underlying dielectric substrate thickness h, and h is 0.508mm.Adopt the paster coupler of mushroom-shaped structure, broadband can be realized and second harmonic suppresses and realizes the output of any power-division ratios simultaneously.Distance in mushroom-shaped structure between the area of single rectangle good conductor paster, rectangle good conductor paster, the diameter of metallic vias are controlled variable, in order to realize broadband for the different merit proportion by subtraction of proposed coupler and second harmonic inhibit feature simultaneously.
Described top layer medium substrate equal with underlying dielectric substrate thickness and be pressed into one.
A method for harmonics restraint wideband patch coupler adjustment merit proportion by subtraction, is characterized in that, by adjusting two can to control any merit proportion by subtraction of coupler output to the radii ratio of fan-shaped paster group.
A kind of harmonics restraint wideband patch coupler realizes the method for broadband and second harmonic suppression simultaneously, it is characterized in that, when need merit proportion by subtraction by adjust two the radii ratio of fan-shaped paster group is obtained time, change the length of side of rectangle good conductor paster, gap between adjacent rectangle good conductor, the radius of metallic vias, the value of rectangle good conductor paster quantity can realize the function of coupler broadband and second harmonic suppression simultaneously, the mushroom-shaped structure that rectangle good conductor paster and metallic vias are connected and composed only affects the operating frequency of coupler, and do not affect power splitting/synthesis network, realize signal suppressing at second harmonic frequency simultaneously.
Compared with prior art, implement the paster coupler of the mushroom-shaped structure adopted in the present invention, there is following effect:
1, below the dielectric substrate of paster, use mushroom-shaped structure, the signal of characteristic frequency can be made by coupler, suppress the signal of characteristic frequency by coupler simultaneously, thus realize harmonic restraining function.The fan-shaped radius that can be 90 ° by on-chip four central angles of adjustment top layer realizes any merit and divides specific output.
2, described mushroom-shaped structure is electromagnetic bandgap structure, and due to Slow-wave effect wherein, the electrical length in unit length is longer, and the size of designed circuit can not increase further thus.
3, replace in the past used branch line structure with paster, make structure simpler, cost is lower.
4, for other structure, the present invention can provide wider relative bandwidth.
5, for branch line structure, the present invention can realize larger merit proportion by subtraction, and its coupling coefficient is maximum can reach 6 dB.
6, for other microstrip line construction, use when the present invention is adapted at high operate frequency more.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention structural representation.
Fig. 2 is the location diagram of fan-shaped patch layer and mushroom-shaped structure under the present invention overlooks state.
Fig. 3 is side structure schematic diagram of the present invention.
Fig. 4 is the fan-shaped patch layer structural representation of the present invention.
Fig. 5 is electro-magnetic bandgap Rotating fields schematic diagram of the present invention.
Fig. 6 is the side perspective view reflecting the mushroom-shaped structure of the present invention.
Fig. 7 is emulation and the measured result comparison diagram of the contrast of invention one embodiment coupling coefficient.
Fig. 8 is emulation and the measured result comparison diagram of the contrast of invention one embodiment phase difference.
Fig. 9 is emulation and the measured result comparison diagram of the contrast of another embodiment coupling coefficient of invention.
Figure 10 is emulation and the measured result comparison diagram of the contrast of another embodiment phase difference of invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, detailed description to the technical scheme that the embodiment of the present invention adopts, described embodiment is only a part of embodiment in the present invention, instead of whole embodiments.Based on embodiments of the invention, other embodiments that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the protection range of the embodiment of the present invention.
Shown in Fig. 1 and Fig. 6, a kind of harmonics restraint wideband patch coupler, comprises fan-shaped patch layer 101, top layer medium substrate 102, electromagnetic belt gap layer 103, underlying dielectric substrate 104 and the metal ground layer 105 of arranging successively from top to bottom; Described fan-shaped patch layer 101 comprises the fan-shaped paster group 201 that HBV"liang dui ban" footpath small one and large one and central angle are 90 °, and two fan-shaped pasters of every a pair fan-shaped paster group 201, with origin symmetry, are provided with output port 203 between adjacent two fan-shaped pasters; Described electromagnetic belt gap layer 103 arranged in arrays have N*N rectangle good conductor paster 202, N be more than or equal to 2 positive integer; The center of described underlying dielectric substrate 104 corresponding rectangle good conductor paster 202 is provided with metallic vias, and metallic vias runs through underlying dielectric substrate 104 and is connected with rectangle good conductor paster 202 and metal ground layer 105 respectively.
The output port 203 of described fan-shaped patch layer 101 is provided with four, and each output port 203 is connected to 50 ohm microstrip (connection microstrip line).
Described N is 4 or 5.
Described two are respectively the first fan-shaped paster group and the second fan-shaped paster group to fan-shaped paster group 201, and in the first fan-shaped paster group, the radius R 1 of fan-shaped paster is 4.9mm, R2 is 6.6mm, and in the second fan-shaped paster group, the radius R 1 of fan-shaped paster is 1.3mm, R2 is 4.9mm.Described rectangle good conductor paster 202 is the square of Wp in the length of side, in first fan-shaped paster group, the Wp of fan-shaped paster is 2.8mm, in second fan-shaped paster group, the Wp of fan-shaped paster is 2.6mm, and in two fan-shaped paster groups, between rectangle good conductor paster 202, clearance G is 0.8mm.
The radius R v of described metallic vias is 0.25mm.
Described rectangle good conductor paster 202 connects and composes mushroom-shaped structure with metallic vias, and the thickness after rectangle good conductor paster 202 is connected with metallic vias equals underlying dielectric substrate 104 thickness h, and h is 0.508mm.
Described top layer medium substrate 102 equal with underlying dielectric substrate 104 thickness and be pressed into one.
Above-mentioned top layer medium substrate 102 adopts thickness to be the Rogers RO4003C material medium substrate of 0.508 mm, and its dielectric constant is 3.38.Underlying dielectric substrate 104 adopts thickness to be the Rogers RO 4003C material medium substrate of 0.508mm, and its dielectric constant is 3.38.Metal ground layer 105 adopts the structure being paved with good conductor.
Because the present invention adopts paster structure, change the dimensional parameters in its structure, size as R1, R2, Wp, G, Rv, N can affect the merit proportion by subtraction of coupler simultaneously, the performance that broadband and second harmonic suppress, therefore can be realized broadband, second harmonic suppression, arbitrarily merit divide the coupler structure of specific output by the size adjusting above-mentioned size.
The method of adjustment merit proportion by subtraction:
Change the R1 in institute's proposition coupler, R2 can be used for adjusting the power-division ratios of coupler, and when R2, Wp, G, Rv parameter constant, when the size of adjustment R1 diminishes, coupling coefficient S21 will become large, and coupling coefficient S31 will diminish.When R1, Wp, G, Rv parameter constant, when R2 diminishes, coupling coefficient S21 will diminish, and coupling coefficient S31 will become large, can draw thus, and the ratio of R1 and R2 can control the output of any merit proportion by subtraction of coupler.
Realize the method for broadband and second harmonic suppression simultaneously:
When the merit proportion by subtraction needed is obtained by the ratio adjusting R1 and R2, the value changing Wp, G, Rv, N can realize the function of coupler broadband and second harmonic suppression simultaneously, make mushroom-shaped structure only affect the operating frequency of coupler and not affect power splitting/synthesis network, realize signal suppressing at second harmonic frequency simultaneously.
Provide two groups of different emulation below and measured result contrast shows effect of the present invention to show.
Shown in Fig. 7 and Fig. 8, what it was shown is with the present invention 6.85 GHz realize simultaneously broadband and second harmonic inhibit feature etc. merit divide the emulation of output and survey comparison diagram, design example 1 is 3.5 ± 0.5dB at the coupling coefficient of output port 203.Physical circuit parameter is: R1=4.9 mm, R2=6.6 mm, Wp=2.8 mm, G=0.8 mm, Rv=0.25 mm, N=4.This coupler operating frequency is 5.6 GHz-8.1 GHz, and relative bandwidth is 36.5%z.In this operating frequency range, between port 3 and port 2, phase difference is 89 ° ± 2 °, and between port 2 and port 3, amplitude imbalance degree is less than 1 dB.Designed Circuit display goes out good second harmonic inhibit feature, achieves and lack the harmonic restraining function of 14db at second harmonic frequency.
Shown in Fig. 9 and Figure 10, what it was shown is the emulation of the large merit minute specific output simultaneously realizing broadband and second harmonic inhibit feature with the present invention at higher operational frequency point and actual measurement comparison diagram, and design example two provides the coupling coefficient of 6dB (coupling range is 6.5 ± 0.5dB) at 2 ports.In figure, the parameter of circuit is: R1=1.3 mm, R2=6.1 mm, Wp=2.6 mm, G=0.8 mm, Rv=0.25 mm, N=5.This coupler operating frequency is 5 GHz-8 GHz, and relative bandwidth is 46.2%.In this operating frequency range, between port 3 and port 2, phase difference is 90 ° ± 6 °.Within the scope of second harmonic frequency, designed Circuit display goes out good second harmonic inhibit feature, achieves and lack the harmonic restraining function of 15dB, and visible the present invention can export in order to realize high coupling coefficient.
Wherein, in Fig. 7 and Figure 10, S-parameters refers to coupling coefficient, and Frequency refers to frequency, Phase Difference(Degree) refer to phase difference (degree), Simulated refers to emulation, and Measured refers to reality.
Above result is all Rogers RO4003C at baseplate material, and dielectric constant is 3.38, and substrate thickness is recorded by network analyzer under the true environment of 0.508 mm.Can be found by emulation and test comparison figure above, emulate and the goodness of fit of measured curve higher, indicate the solution of the present invention practical.
Be more than to the present invention a kind of can realize simultaneously broadband and second harmonic suppress and provide arbitrarily not etc. merit divide the novel coupler of specific output institute to provide the detailed introduction of embodiment, include the method realizing adjusting operating frequency and adjusting its merit proportion by subtraction in relevant work frequency simultaneously.Used specific case to set forth principle of the present invention and execution mode herein, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.
For one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Claims (10)
1. a harmonics restraint wideband patch coupler, is characterized in that, comprises fan-shaped patch layer (101), top layer medium substrate (102), electromagnetic belt gap layer (103), underlying dielectric substrate (104) and the metal ground layer (105) of arranging successively from top to bottom;
Described fan-shaped patch layer (101) comprises the fan-shaped paster group (201) that HBV"liang dui ban" footpath small one and large one and central angle are 90 °, two fan-shaped pasters of every a pair fan-shaped paster group (201), with origin symmetry, are provided with output port (203) between adjacent two fan-shaped pasters;
Described electromagnetic belt gap layer (103) arranged in arrays has N*N rectangle good conductor paster (202), N be more than or equal to 2 positive integer;
The center of described underlying dielectric substrate (104) corresponding rectangle good conductor paster (202) is provided with metallic vias, and metallic vias runs through underlying dielectric substrate (104) and is connected with rectangle good conductor paster (202) and metal ground layer (105) respectively.
2. harmonics restraint wideband patch coupler according to claim 1, it is characterized in that, the output port (203) of described fan-shaped patch layer (101) is provided with four, and each output port (203) is connected to 50 ohm microstrip.
3. harmonics restraint wideband patch coupler according to claim 1, it is characterized in that, described N is 4 or 5.
4. harmonics restraint wideband patch coupler according to claim 1, it is characterized in that, described two are respectively the first fan-shaped paster group and the second fan-shaped paster group to fan-shaped paster group (201), the radius R of fan-shaped paster in the first fan-shaped paster group
1for 1.3mm, R
2for 6.1mm, the radius R of fan-shaped paster in the second fan-shaped paster group
1for 4.9mm, R
2for 6.6mm.
5. harmonics restraint wideband patch coupler according to claim 1, it is characterized in that, described rectangle good conductor paster (202) is W in the length of side
psquare, W in the first fan-shaped paster group
pfor 2.6mm, W in fan-shaped paster in the second fan-shaped paster group
pfor 2.8mm, between two fan-shaped paster group rectangles good conductor paster (202), clearance G is 0.8mm.
6. harmonics restraint wideband patch coupler according to claim 1, is characterized in that, the radius R of described two fan-shaped paster group metallic vias
vfor 0.25mm.
7. harmonics restraint wideband patch coupler according to claim 1, it is characterized in that, described rectangle good conductor paster (202) and metallic vias connect and compose mushroom-shaped structure, thickness after rectangle good conductor paster (202) is connected with metallic vias equals underlying dielectric substrate (104) thickness h, and h is 0.508mm.
8. harmonics restraint wideband patch coupler according to claim 1, is characterized in that, described top layer medium substrate (102) is equal with underlying dielectric substrate (104) thickness and be pressed into one.
9. a method for harmonics restraint wideband patch coupler adjustment merit proportion by subtraction, is characterized in that, by adjusting two can to control any merit proportion by subtraction of coupler output to the radii ratio of fan-shaped paster group (201).
10. a harmonics restraint wideband patch coupler realizes the method that broadband and second harmonic suppress simultaneously, it is characterized in that, when need merit proportion by subtraction by adjust two the radii ratio of fan-shaped paster group (201) is obtained time, change the length of side of rectangle good conductor paster (202), gap between adjacent rectangle good conductor, the radius of metallic vias, the value of rectangle good conductor paster (202) quantity can realize the function of coupler broadband and second harmonic suppression simultaneously, the mushroom-shaped structure that rectangle good conductor paster (202) and metallic vias are connected and composed only affects the operating frequency of coupler, and do not affect power splitting/synthesis network, realize signal suppressing at second harmonic frequency simultaneously.
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| CN201510035102.1A CN104577287B (en) | 2015-01-23 | 2015-01-23 | Harmonics restraint wideband patch coupler and its adjustment work(divide the method for ratio while realize broadband and the method that second harmonic inhibits |
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| CN111416183A (en) * | 2020-03-19 | 2020-07-14 | 南京智能高端装备产业研究院有限公司 | Novel single-passband filter coupler adopting double-layer circular patches |
| CN112072249A (en) * | 2020-07-20 | 2020-12-11 | 西安电子科技大学 | Broadband slow wave substrate integrated waveguide with high slow wave coefficient |
| CN112385141A (en) * | 2018-07-10 | 2021-02-19 | 华为技术有限公司 | Improved harmonic termination integrated passive device |
| CN113285187A (en) * | 2021-05-13 | 2021-08-20 | 上海大学 | Miniaturized low-pass filter with slow-wave characteristic and inverted mushroom nail structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113285187A (en) * | 2021-05-13 | 2021-08-20 | 上海大学 | Miniaturized low-pass filter with slow-wave characteristic and inverted mushroom nail structure |
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| CN104577287B (en) | 2018-06-19 |
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