CN210469246U - Adjustable amplitude equalizer based on SIR structure - Google Patents
Adjustable amplitude equalizer based on SIR structure Download PDFInfo
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- CN210469246U CN210469246U CN201922059446.2U CN201922059446U CN210469246U CN 210469246 U CN210469246 U CN 210469246U CN 201922059446 U CN201922059446 U CN 201922059446U CN 210469246 U CN210469246 U CN 210469246U
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Abstract
The utility model discloses an adjustable range equalizer based on SIR structure belongs to equalizer technical field. The dielectric substrate comprises a dielectric substrate, an input port, an output port, an SIR resonance unit and a metal stratum, wherein the input port is connected with the output port through a main transmission line; the SIR resonance unit comprises a rectangular strip microstrip line and an arc microstrip line, and the tail end of the arc microstrip line is in short circuit connection with the metal stratum; a PIN diode is arranged between the SIR resonance unit and the main transmission line, the cathode of the PIN diode is connected with the corresponding SIR resonance unit, and the anode of the PIN diode is connected with the main transmission line through a gold wire; the metal stratum is provided with a defected ground structure. The utility model discloses have broadband, small-size, range adjustable characteristic, have wide application prospect.
Description
Technical Field
The utility model belongs to the technical field of the balanced device, especially indicate an adjustable range balanced device based on SIR structure, can be used to satellite communication link's range balancing equipment.
Background
During the transmission process of the signal, the signal components with different frequencies have non-uniform amplitude variation, which is called amplitude distortion. The curves of the amplitude distortion can be classified into a parabolic type, a reverse bell type, a positive slope type and a negative slope type according to different signal links, wherein the negative slope type is the most common. The amplitude distortion is corrected by passing the signal before or after it is distorted through an equalization network having amplitude-frequency characteristics that are exactly opposite to those of the distorted signal, which is known as an amplitude equalizer.
The amplitude equalizer mainly has four forms of lumped parameter type, coaxial type, waveguide type and integrated transmission line type. The lumped parameter type is limited by components, is generally applied to a low frequency band and is not suitable for a high frequency band; the coaxial microwave equalizer is generally used for high-power circuit equalization; the waveguide type is suitable for the high end of microwave frequency; the integrated transmission line type microwave equalizer has the advantages of small volume, light weight and convenient integration with a solid-state circuit.
The resonant cell is the most basic component of an amplitude equalizer. The integrated transmission line type amplitude equalizer is mainly based on a micro-strip branch node type resonance unit loaded by resistors, and the resonance unit is composed of micro-strip lines with different lengths (lambda/4 or lambda/2, namely, a quarter wavelength or a half wavelength) and termination forms (short circuit or open circuit). Compared with the lambda/2 resonant unit with an open terminal, the lambda/4 resonant unit with a short terminal has smaller volume, parasitic passband is farther away from a resonance point, and the lambda/4 resonant unit with a short terminal has more advantages in terms of miniaturization and performance.
The amplitude equalizer can adopt a single resonance unit or a cascade connection mode of multiple resonance units to realize different equalization quantity requirements. However, for the satellite communication system, the core of the problem is not the size of the equalization amount, but the equalization amount is uncertain, the link devices are numerous, the signal distortion degree is difficult to predict in advance, and therefore the fixed equalizer in the prior art cannot meet the system requirements.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses an adjustable range equalizer based on SIR structure has operating frequency bandwidth, the balancing volume is big, the balancing volume is adjustable, small characteristics dynamically.
In order to realize the above purpose, the utility model discloses the technical scheme who adopts is:
an adjustable amplitude equalizer based on an SIR structure is characterized by comprising a medium substrate 1, wherein the front surface of the medium substrate is provided with an input port 2, an output port 4 and at least one pair of SIR resonance structures, the back surface of the medium substrate is a metal ground layer, and the input port 2 and the output port 4 are connected through a main transmission line 3; each pair of SIR resonance structures comprises two SIR resonance units which are respectively positioned at two sides of the main transmission line 3, each SIR resonance unit comprises a rectangular strip microstrip line part and an arc microstrip line part, the width of the arc microstrip line part is smaller than that of the rectangular strip microstrip line part, the short sides of the inner sides of the rectangular strip microstrip line parts of the two SIR resonance units in one pair are opposite, the arc microstrip line part extends out from the short side of the outer side of the rectangular strip microstrip line part, and the tail end of the arc microstrip line part is also provided with a grounding column which is in short circuit connection with a metal ground layer; a PIN diode is arranged between each SIR resonance unit and the main transmission line 3, the negative pole of each PIN diode is connected with the corresponding SIR resonance unit, and the positive pole of each PIN diode is connected with the main transmission line 3 through a gold wire; and a plurality of defected ground structures which correspond to the SIR resonant structures one by one are arranged on the metal ground layer, and orthographic projections of two rectangular strip microstrip line parts in each pair of SIR resonant structures are just positioned in the areas of the corresponding defected ground structures.
Further, the main transmission line 3 is a straight line, the SIR resonance structure has two pairs, the arc microstrip line portion is a semi-arc, the long side of the rectangular strip microstrip line portion is perpendicular to the main transmission line, the connection line of the two end points of the arc microstrip line portion is perpendicular to the long side of the rectangular strip microstrip line portion, and the extending and rotating directions of the two arc microstrip line portions on the same side of the main transmission line are opposite.
Further, the SIR resonance unit is a quarter-wave resonator.
Further, the PIN diode is in a tube core form, the junction capacitance of the PIN diode is 0.05pf, and the series resistance of the PIN diode is 2.0 omega.
Further, the medium substrate 1 is Al2O3The ceramic substrate had a dielectric constant of 9.8 and a thickness of 0.254 mm.
The utility model adopts the above technical scheme to produce for prior art beneficial effect lies in:
1. the utility model discloses a plurality of microstrip branch and knot line resonance units can be integrateed to the amplitude equalizer, have increased balanced dynamic range.
2. The utility model provides a microstrip branch and node line resonance unit comprises the lambda 4 microstrip line of terminal short circuit, has effectively reduced amplitude equalizer's volume.
3. The utility model provides a microstrip branch and node line resonance unit adopts SIR (Stepped Impedance Resonator) structure to replace traditional UIR (uniform Impedance Resonator) structure, has not only further reduced the size, and makes parasitic passband squint to the high frequency.
4. The utility model discloses amplitude equalizer adopts the PIN diode to replace the resistance in the fixed equalizer, and the PIN diode demonstrates different internal resistance values under the conduction current condition of difference, replaces the resistance in the fixed equalizer with it, and then the developments that balanced range can be realized to the equalizer are adjustable.
Drawings
Fig. 1 is a schematic structural diagram of an amplitude equalizer in an embodiment of the present invention;
FIG. 2 is a schematic structural view of the front side of FIG. 1;
FIG. 3 is a schematic view of the backside of FIG. 1;
FIG. 4 is a comparison diagram of S parameter simulation results corresponding to the presence or absence of DGS loading in the embodiment of the present invention;
fig. 5 is a diagram of simulation results of S parameters corresponding to different equalization values in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
An adjustable amplitude equalizer based on an SIR structure is characterized by comprising a medium substrate 1, wherein the front surface of the medium substrate is provided with an input port 2, an output port 4 and at least one pair of SIR resonance structures, the back surface of the medium substrate is a metal ground layer, and the input port 2 and the output port 4 are connected through a main transmission line 3; each pair of SIR resonance structures comprises two SIR resonance units which are respectively positioned at two sides of the main transmission line 3, each SIR resonance unit comprises a rectangular strip microstrip line part and an arc microstrip line part, the width of the arc microstrip line part is smaller than that of the rectangular strip microstrip line part, the short sides of the inner sides of the rectangular strip microstrip line parts of the two SIR resonance units in one pair are opposite, the arc microstrip line part extends out from the short side of the outer side of the rectangular strip microstrip line part, and the tail end of the arc microstrip line part is also provided with a grounding column which is in short circuit connection with a metal ground layer; a PIN diode is arranged between each SIR resonance unit and the main transmission line 3, the negative pole of each PIN diode is connected with the corresponding SIR resonance unit, and the positive pole of each PIN diode is connected with the main transmission line 3 through a gold wire; and a plurality of defected ground structures which correspond to the SIR resonant structures one by one are arranged on the metal ground layer, and orthographic projections of two rectangular strip microstrip line parts in each pair of SIR resonant structures are just positioned in the areas of the corresponding defected ground structures.
Specifically, as shown in fig. 1, an adjustable amplitude equalizer based on an SIR structure includes a dielectric substrate 1, where the front surface of the dielectric substrate 1 is provided with an input port 2, an output port 4, a main transmission line 3, a first SIR resonance unit 5, a second SIR resonance unit 6, a third SIR resonance unit 7, and a fourth SIR resonance unit 8, and the back surface of the dielectric substrate 1 is provided with a metal ground layer having a first defected ground structure 9 and a second defected ground structure 10. The main transmission line 3 is a straight line, the arc-shaped microstrip line part of the SIR resonance unit is a semi-arc, the long edge of the rectangular strip-shaped microstrip line part of the SIR resonance unit is perpendicular to the main transmission line, the connecting line of two end points of the arc-shaped microstrip line part is perpendicular to the long edge of the rectangular strip-shaped microstrip line part, and the extending and rotating directions of the two arc-shaped microstrip line parts on the same side of the main transmission line are opposite.
Fig. 2 is a schematic diagram of the front side of the amplitude equalizer, i.e. the plane of the main transmission line, where the main transmission line 1 connects the input port 2 and the output port 4, the first SIR resonance unit 5 is connected to the cathode of the first PIN diode D1, the anode of the first PIN diode D1 is connected to the main transmission line through gold wire, the second SIR resonance unit 6 is connected to the cathode of the second PIN diode D2, the anode of the second PIN diode D2 is connected to the main transmission line through gold wire, the third SIR resonance unit 7 is connected to the cathode of the third PIN diode D3, the anode of the third PIN diode D3 is connected to the main transmission line through gold wire, the fourth SIR resonance unit 8 is connected to the cathode of the fourth PIN diode D4, and the anode of the fourth PIN diode D4 is connected to the main transmission line through gold wire.
Fig. 3 is a schematic diagram of the front surface of the amplitude equalizer, i.e., a plane where the defected ground structure is located, where the first defected ground structure 9 is a hollow area of the metal layer directly below the first SIR resonance unit 1 and the second SIR resonance unit 2, and the second defected ground structure 10 is a hollow area of the metal layer directly below the third SIR resonance unit 3 and the fourth SIR resonance unit 4.
In the amplitude equalizer, four SIR resonance units are lambda/4 resonators with short-circuited terminals. When the amplitude equalizer is designed, according to design requirements, the resonant frequency can be changed by changing the length of the resonant unit, and then the working frequency band of the equalizer is changed. The length, width and position parameters of the defected ground structure influence the quality factor of the equivalent circuit of the resonance unit, so that when the amplitude equalizer is designed, the working frequency band of the equalizer can be adjusted without changing the size of the resonance unit.
Furthermore, the four PIN diodes D1-D4 are all in a tube core form, the junction capacitance is 0.05pf, and the series resistance is 2.0 omega; in addition, Al can be used as the dielectric substrate2O3The ceramic substrate had a dielectric constant of 9.8 and a thickness of 0.254 mm.
The working principle of the amplitude equalizer is as follows:
1. the amplitude equalizer adopts a mode of cascade connection of multi-stage microstrip branch lines to realize a broadband amplitude equalizer, each microstrip branch is a lambda/4 resonator with a short-circuited terminal, the resonator is equivalent to an LC parallel resonance circuit at a resonance point, the resonance point is a transmission peak value corresponding to the equalizer, and the position of the resonance point can be changed by adjusting the length of the microstrip branch.
2. The amplitude equalizer adopts an SIR structure to replace an UIR structure, after the size, the performance and the realizability are comprehensively considered, the high-low impedance ratio of the SIR is determined to be 0.43, at the moment, the low impedance value is 30 omega, the high impedance value is 70 omega, the length of a low-impedance microstrip line is 2.25mm, and the length of a high-impedance microstrip line is 2.42 mm. Wherein, the high impedance line adopts the form of semicircle, has further reduced the volume.
3. The amplitude equalizer introduces a Defected Ground Structure (DGS) on a metal stratum, and the DGS enables distributed capacitance and inductance of a main transmission line and a resonant unit to be changed, so that resonant frequency of the resonant unit is changed. During design, the size of the DGS can be adjusted according to the requirement of the resonant frequency. As shown in fig. 4, after the DGS is applied, the resonant frequency of the amplitude equalizer is shifted to the high frequency side, and when the DGS is not applied, the resonant frequency of the equalizer is 4.3GHz, and the resonant frequency of the equalizer after the DGS is applied is 5.5 GHz.
4. In the amplitude equalizer, four PIN diodes D1-D4 are oppositely arranged on two sides of a main transmission line in pairs, anodes of the four PIN diodes are connected with the main transmission line through gold wires respectively, and cathodes of the four PIN diodes are connected with four resonance units respectively. When the amplitude equalizer works, the four PIN diodes are equivalent to resistors, different resistance values correspond to different equalization values, specific numerical values are determined by voltage-controlled current values, when the voltage-controlled current is small, the equivalent resistance value is large, and at the moment, the equalization value is small; when the voltage-controlled current is large, the equivalent resistance value is small, and the equilibrium value is large, so that the equilibrium value can be dynamically adjusted. As shown in fig. 5, the equalization value for the no equalization curve is 0dB, and the equalization value for the maximum equalization curve is 22 dB.
In a word, the utility model discloses amplitude equalizer's operating frequency range can reach 0.4GHz ~ 5.0GHz, and the biggest balanced range can reach 22dB, and it has operating frequency bandwidth, the balance is big, the balance dynamic adjustable, small advantage, is an important improvement to prior art.
It should be understood that the above description of the embodiments of the present patent is only an exemplary description for facilitating the understanding of the patent scheme by the person skilled in the art, and does not imply that the scope of protection of the patent is only limited to these examples, and that the person skilled in the art can obtain more embodiments by combining technical features, replacing some technical features, adding more technical features, and the like to the various embodiments listed in the patent without any inventive effort on the premise of fully understanding the patent scheme, and therefore, the new embodiments are also within the scope of protection of the patent.
Claims (5)
1. An adjustable amplitude equalizer based on an SIR structure is characterized by comprising a dielectric substrate (1), wherein the front surface of the dielectric substrate is provided with an input port (2), an output port (4) and at least one pair of SIR resonance structures, the back surface of the dielectric substrate is a metal ground layer, and the input port (2) is connected with the output port (4) through a main transmission line (3); each pair of SIR resonance structures comprises two SIR resonance units which are respectively positioned at two sides of the main transmission line (3), each SIR resonance unit comprises a rectangular strip microstrip line part and an arc microstrip line part, the width of the arc microstrip line part is smaller than that of the rectangular strip microstrip line part, the short sides of the inner sides of the rectangular strip microstrip line parts of the two SIR resonance units in one pair are opposite, the arc microstrip line part extends out from the short side of the outer side of the rectangular strip microstrip line part, and the tail end of the arc microstrip line part is further provided with a grounding column which is in short circuit connection with a metal stratum; a PIN diode is arranged between each SIR resonance unit and the main transmission line (3), the negative pole of each PIN diode is connected with the corresponding SIR resonance unit, and the positive pole of each PIN diode is connected with the main transmission line (3) through a gold wire; and a plurality of defected ground structures which correspond to the SIR resonant structures one by one are arranged on the metal ground layer, and orthographic projections of two rectangular strip microstrip line parts in each pair of SIR resonant structures are just positioned in the areas of the corresponding defected ground structures.
2. The adjustable amplitude equalizer based on SIR structure as claimed in claim 1, wherein the main transmission line (3) is a straight line, the SIR resonance structure has two pairs, the arc microstrip line section is a semi-arc, the long side of the rectangular microstrip line section is perpendicular to the main transmission line, the connection line of the two end points of the arc microstrip line section is perpendicular to the long side of the rectangular microstrip line section, and the extending rotation directions of the two arc microstrip line sections on the same side of the main transmission line are opposite.
3. The adjustable amplitude equalizer based on an SIR structure of claim 1, wherein the SIR resonating element is a quarter-wave resonator.
4. The adjustable amplitude equalizer based on the SIR structure of claim 1, wherein the PIN diode is in the form of a die with a junction capacitance of 0.05pf and a series resistance of 2.0 Ω.
5. The adjustable amplitude equalizer based on SIR structure as claimed in claim 1, characterized in that the dielectric substrate (1) is Al2O3The ceramic substrate had a dielectric constant of 9.8 and a thickness of 0.254 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922059446.2U CN210469246U (en) | 2019-11-26 | 2019-11-26 | Adjustable amplitude equalizer based on SIR structure |
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| CN201922059446.2U CN210469246U (en) | 2019-11-26 | 2019-11-26 | Adjustable amplitude equalizer based on SIR structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110784187A (en) * | 2019-11-26 | 2020-02-11 | 中国电子科技集团公司第五十四研究所 | Adjustable amplitude equalizer based on SIR structure |
| CN112002975A (en) * | 2020-08-27 | 2020-11-27 | 电子科技大学 | Miniaturized equalizer based on double-helix resonator and defected ground structure |
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2019
- 2019-11-26 CN CN201922059446.2U patent/CN210469246U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110784187A (en) * | 2019-11-26 | 2020-02-11 | 中国电子科技集团公司第五十四研究所 | Adjustable amplitude equalizer based on SIR structure |
| CN110784187B (en) * | 2019-11-26 | 2024-10-29 | 中国电子科技集团公司第五十四研究所 | SIR structure-based adjustable amplitude equalizer |
| CN112002975A (en) * | 2020-08-27 | 2020-11-27 | 电子科技大学 | Miniaturized equalizer based on double-helix resonator and defected ground structure |
| CN112002975B (en) * | 2020-08-27 | 2021-09-24 | 电子科技大学 | Miniaturized equalizer based on double-helix resonator and defected ground structure |
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