CN111490320A - Reconfigurable power division filter - Google Patents
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- CN111490320A CN111490320A CN202010317899.5A CN202010317899A CN111490320A CN 111490320 A CN111490320 A CN 111490320A CN 202010317899 A CN202010317899 A CN 202010317899A CN 111490320 A CN111490320 A CN 111490320A
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- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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Abstract
The invention discloses a reconfigurable power division filter, which comprises a dielectric substrate, wherein a metal ground plate is arranged on the bottom surface of the dielectric substrate, an input port feeder line, a first output port feeder line and a second output port feeder line are arranged on the upper surface of the dielectric substrate, a parallel L C resonator is arranged between the input port feeder line and the first output port feeder line as well as between the input port feeder line and the second output port feeder line, and a first isolation resistor is arranged between the first output port feeder line and the second output port feeder line.
Description
Technical Field
The invention relates to the field of microwave passive devices, in particular to a reconfigurable power division filter.
Background
Power dividers and filters are two indispensable passive devices in modern wireless communication systems. In a system, they are usually cascaded together, which tends to result in larger circuit size and higher insertion loss. To solve this problem, the Power divider and the band pass filter are integrated into one component, i.e., a Power divider Filter (FPD), while implementing the functions of designated Power distribution or combination and frequency selectivity. In addition, with the development of modern wireless communication systems, the demand for reconfigurable microwave devices with multiple functions is increasing. However, the existing reconfigurable power division filter is rarely researched and mostly based on a two-way symmetric coupling structure, if the multifunctional reconfigurable filter is to be implemented, many varactor diodes are needed, and if a large number of varactor diodes are loaded, the original filtering is correspondingly affected, so that most of the existing reconfigurable power division filters can only implement the reconfiguration of one function.
Document 1[ h.zhu, a.m.abbosh, and L. Guo, "Planar In-Phase Filtering Power divider With Tunable Power Division and control Band for wireless communication Systems," IEEE transaction on Components, packaging and manufacturing Technology, vol.8, No.8,0 pp.1458-1468, aug.2018] FPD reconstructability is achieved by loading the branch and varactor diodes on the λ/4 impedance transformer of the wilkinson Power divider.
Document 2[ c.f.chen, c. -y. L in, b. -h.tseng, and s. -f.chang, "Compact micro-structural Tunable Power Divider With Chebyshevbandpass response," IEEE microwave Conference, vol.pp.1291-1293, nov.2014] and document 3[ L. Gao, x.y.zhang, and q.xue, "Compact Tunable Power Divider With Constant impedance band, IEEE Transactions on microwave transducers and technologies, vol.63, No.10, 3505-3513, oct.3513 ] use a pair of Tunable resonant structures With varactors to replace the design of the lambda/4 Tunable impedance sub-filters, although the high bandwidth of these filters can not be achieved by these designs, or by the alternative design of these filters.
Document 4[ p. L. Chi and t.yang, "a 1.3-2.08 GHz Filtering Power Divider with bandwidth Control and High In-Band Isolation," IEEE Microwave & wireless components L meters, vol.26, No.6, pp.407-409, may.2016] combines a three-port input tuning network with two second-order filters, proposing a varactor-based High Isolation fpd.
Disclosure of Invention
The invention provides a reconfigurable power division filter, which aims to solve the problem that the existing reconfigurable power division filter cannot realize continuous adjustment of center frequency and power division ratio.
The embodiment of the invention provides a reconfigurable power division filter, which comprises a dielectric substrate, wherein a metal grounding plate is arranged on the bottom surface of the dielectric substrate, an input port feeder line, a first output port feeder line and a second output port feeder line are arranged on the upper surface of the dielectric substrate, a parallel L C resonator is arranged between the input port feeder line and the first output port feeder line as well as between the input port feeder line and the second output port feeder line, and a first isolation resistor is arranged between the first output port feeder line and the second output port feeder line.
Further, in an implementation manner, the input port feeder includes a first 50 ohm microstrip conduction band, a first impedance match line, and a first dc blocking capacitor, one end of the first 50 ohm microstrip conduction band extends to the first side of the dielectric substrate, the other end of the first 50 ohm microstrip conduction band is connected to one end of the first impedance match line, and the other end of the first impedance match line is connected to the first dc blocking capacitor.
Further, in an implementation manner, the first output port feeder includes a second 50 ohm microstrip line conduction band and a second impedance match line, which are connected in sequence, one end of the second 50 ohm microstrip line conduction band extends to the second side edge of the dielectric substrate, and the other end of the second 50 ohm microstrip line conduction band is connected to the second impedance match line.
Further, in an implementation manner, the second output port feeder includes a third 50 ohm microstrip line conduction band and a third impedance match line, which are connected in sequence, one end of the third 50 ohm microstrip line conduction band extends to the second side of the dielectric substrate, and the other end of the third 50 ohm microstrip line conduction band is connected to the third impedance match line.
Further, in one implementation manner, the parallel L C resonator includes a first quarter-wavelength transmission line, a second quarter-wavelength transmission line, a third quarter-wavelength transmission line, and a fourth quarter-wavelength transmission line, the first quarter-wavelength transmission line and the third quarter-wavelength transmission line are located on the same straight line, the second quarter-wavelength transmission line and the fourth quarter-wavelength transmission line are located on the same straight line, the straight line on which the first quarter-wavelength transmission line is located is parallel to the straight line on which the second quarter-wavelength transmission line is located, and the first quarter-wavelength transmission line, the second quarter-wavelength transmission line, the third quarter-wavelength transmission line, and the fourth quarter-wavelength transmission line are connected to each other through a fifth quarter-wavelength transmission line.
Further, in one implementation, one end of the first quarter-wavelength transmission line is connected to a metal ground plate through a first ground post; one end of the second quarter-wavelength transmission line is connected to the metal grounding plate through a second grounding column; one end of the third quarter-wavelength transmission line is connected with a second blocking capacitor, one end of the second blocking capacitor is connected with the first direct-current voltage loading point through a second isolation resistor, the other end of the second blocking capacitor is connected with a third grounding post through a first variable capacitance diode, and the third grounding post is connected to the metal grounding plate; one end of the fourth quarter-wavelength transmission line is connected with a third blocking capacitor, one end of the third blocking capacitor is connected with the second direct-current voltage loading point through a third isolation resistor, the other end of the third blocking capacitor is connected with a fourth grounding post through a second variable capacitance diode, and the fourth grounding post is connected with the metal grounding plate.
Further, in one implementation, the first quarter-wavelength transmission line, the second quarter-wavelength transmission line, the third quarter-wavelength transmission line and the fourth quarter-wavelength transmission line are connected to each other by a fifth quarter-wavelength transmission line, and one end of the fifth quarter-wavelength transmission line is connected to a fourth isolation resistor, which is connected to the metal ground plate through a fifth ground pillar; the other end of the third quarter-wavelength transmission line is connected with a fourth DC blocking capacitor, one end of the fourth DC blocking capacitor is connected with a third DC voltage loading point through a seventh isolation resistor, and the other end of the fourth DC blocking capacitor is connected with the fourth quarter-wavelength transmission line through a third variable capacitance diode.
Further, in one implementation, the second quarter-wavelength transmission line and the fourth quarter-wavelength transmission line are connected with a fourth varactor and a fifth varactor respectively; one end of the fourth variable capacitance diode is connected to a second output port feeder line through a fifth isolation capacitor, and the other end of the fourth variable capacitance diode is connected to a fourth direct-current voltage loading point through a fifth isolation resistor;
one end of the fifth variable capacitance diode is connected to the first output port feeder line through a sixth blocking capacitor, and the other end of the fifth variable capacitance diode is connected to a fifth direct-current voltage loading point through a sixth isolation resistor.
As can be seen from the foregoing technical solutions, an embodiment of the present invention provides a reconfigurable power division filter, including a dielectric substrate, where a metal ground plate is disposed on a bottom surface of the dielectric substrate, an input port feeder, a first output port feeder, and a second output port feeder are disposed on an upper surface of the dielectric substrate, a parallel L C resonator is disposed between the input port feeder and the first output port feeder, and a first isolation resistor is disposed between the first output port feeder and the second output port feeder.
However, the reconfigurable power division filter utilizes the mode that an output port indirectly isolates a resistor, and two paths of outputs share the electromagnetic double coupling between two L C resonators, so that the power division filter which has the advantages of compact structure, low loss, high selectivity, good isolation, small using quantity of diodes and better out-of-band inhibition performance is realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a reconfigurable power division filter according to an embodiment of the present invention;
fig. 2 is a schematic top view of a reconfigurable power division filter according to an embodiment of the present invention;
fig. 3 is a schematic structural size diagram of a reconfigurable power division filter according to an embodiment of the present invention;
fig. 4a is a first simulation diagram of an S parameter of a reconfigurable power division filter according to an embodiment of the present invention;
fig. 4b is a second simulation diagram of the S parameter of the reconfigurable power division filter according to the embodiment of the present invention;
fig. 5a is a simulation diagram of matching characteristics and isolation characteristics S parameters of a first output port feeder of a reconfigurable power division filter according to an embodiment of the present invention;
fig. 5b is a simulation diagram of matching characteristics and isolation characteristics S parameters of a feeder line of a second output port of the reconfigurable power splitting filter according to the embodiment of the present invention.
1-dielectric substrate, 1001-first side, 1002-second side, 101-first dc voltage load point, 102-second dc voltage load point, 103-third dc voltage load point, 104-fourth dc voltage load point, 105-fifth dc voltage load point, 111-first varactor, 112-second varactor, 113-third varactor, 114-fourth varactor, 115-fifth varactor, 2-metal ground plane, 3-input port feed line, 31-first 50 ohm microstrip, 32-first impedance match line, 4-first output port feed line, 41-second 50 ohm microstrip, 42-second impedance match line, 5-second output port feed line, 51-third 50 ohm microstrip, 52-third impedance match line, 6-parallel L C resonator, 61-first quarter wave transmission line, 62-second quarter wave transmission line, 63-third quarter wave transmission line, 64-fourth quarter wave transmission line, 65-fourth quarter wave isolation column, 77-fifth quarter wave isolation resistor, 73-fourth isolation resistor, 77-isolation column, fifth isolation resistor, 73-fourth isolation resistor isolation column, fifth isolation resistor isolation, 73-isolation resistor isolation, fifth isolation column, fifth isolation resistor isolation, sixth isolation resistor isolation column, sixth isolation resistor isolation line, sixth isolation resistor isolation column, sixth isolation line, sixth isolation resistor isolation line, sixth isolation resistor isolation line, sixth isolation line, and fourth.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment of the invention discloses a reconfigurable power division filter with continuously adjustable center frequency and power division ratio, which is applied to the field of microwave radio frequency circuits of wireless communication, satellite navigation systems and the like.
As shown in fig. 1 and fig. 2, the reconfigurable power division filter according to this embodiment includes a dielectric substrate 1, a metal ground plate 2 is disposed on a bottom surface of the dielectric substrate 1, an input port feeder 3, a first output port feeder 4, and a second output port feeder 5 are disposed on an upper surface of the dielectric substrate 1, a parallel L C resonator 6 is disposed between the input port feeder 3 and the first output port feeder 4, and the second output port feeder 5, and a first isolation resistor 71 is disposed between the first output port feeder 4 and the second output port feeder 5.
In the reconfigurable power division filter according to this embodiment, the input port feeder 3 includes a first 50 ohm microstrip conduction band 31, a first impedance match line 32 and a first dc blocking capacitor 81, one end of the first 50 ohm microstrip conduction band 31 extends to a first side 1001 of the dielectric substrate 1, the other end of the first 50 ohm microstrip conduction band 31 is connected to one end of the first impedance match line 32, and the other end of the first impedance match line 32 is connected to the first dc blocking capacitor 81.
In the reconfigurable power division filter according to this embodiment, the first output port feeder 4 includes a second 50 ohm microstrip conduction band 41 and a second impedance match line 42, which are sequentially connected, one end of the second 50 ohm microstrip conduction band 41 extends to the second side 1002 of the dielectric substrate 1, and the other end of the second 50 ohm microstrip conduction band 41 is connected to the second impedance match line 42.
In the reconfigurable power division filter according to this embodiment, the second output port feeder 5 includes a third 50 ohm microstrip conduction band 51 and a third impedance match line 52, which are sequentially connected, one end of the third 50 ohm microstrip conduction band 51 extends to the second side 1002 of the dielectric substrate 1, and the other end of the third 50 ohm microstrip conduction band 51 is connected to the third impedance match line 52.
In the reconfigurable power division filter of this embodiment, the parallel L C resonator 6 includes a first quarter-wavelength transmission line 61, a second quarter-wavelength transmission line 62, a third quarter-wavelength transmission line 63, and a fourth quarter-wavelength transmission line 64, the first quarter-wavelength transmission line 61 and the third quarter-wavelength transmission line 63 are located on the same straight line, the second quarter-wavelength transmission line 62 and the fourth quarter-wavelength transmission line 64 are located on the same straight line, the straight line on which the first quarter-wavelength transmission line 61 is located is parallel to the straight line on which the second quarter-wavelength transmission line 62 is located, and the first quarter-wavelength transmission line 61, the second quarter-wavelength transmission line 62, the third quarter-wavelength transmission line 63, and the fourth quarter-wavelength transmission line 64 are connected to each other through a fifth quarter-wavelength transmission line 65.
In the reconfigurable power division filter according to this embodiment, one end of the first quarter-wavelength transmission line 61 is connected to the metal ground plate 2 through the first ground post 91; one end of the second quarter-wavelength transmission line 62 is connected to the metal ground plate 2 through a second ground post 92; one end of the third quarter-wavelength transmission line 63 is connected to a second dc blocking capacitor 82, one end of the second dc blocking capacitor 82 is connected to the first dc voltage loading point 101 through a second isolation resistor 72, the other end of the second dc blocking capacitor 82 is connected to a third grounding post 93 through a first varactor 111, and the third grounding post 93 is connected to the metal ground plate 2; one end of the fourth quarter-wavelength transmission line 64 is connected to a third blocking capacitor 83, one end of the third blocking capacitor 83 is connected to the second dc voltage loading point 102 through a third isolation resistor 73, the other end of the third blocking capacitor 83 is connected to a fourth grounding post 94 through a second varactor 112, and the fourth grounding post 94 is connected to the metal ground plate 2.
In the reconfigurable power division filter according to this embodiment, a first quarter-wavelength transmission line 61, a second quarter-wavelength transmission line 62, a third quarter-wavelength transmission line 63, and a fourth quarter-wavelength transmission line 64 are connected to each other by a fifth quarter-wavelength transmission line 65, one end of the fifth quarter-wavelength transmission line 65 is connected to a fourth isolation resistor 74, and the fourth isolation resistor 74 is connected to the metal ground plane 2 through a fifth ground pillar 95; the other end of the third quarter-wavelength transmission line 63 is connected to a fourth dc blocking capacitor 84, one end of the fourth dc blocking capacitor 84 is connected to the third dc voltage loading point 103 through a seventh isolation resistor 77, and the other end of the fourth dc blocking capacitor 84 is connected to the fourth quarter-wavelength transmission line 64 through a third varactor diode 113.
In the reconfigurable power division filter according to this embodiment, a junction of the second quarter-wavelength transmission line 62 and the fourth quarter-wavelength transmission line 64 is connected to a fourth varactor 114 and a fifth varactor 115, respectively; one end of the fourth varactor 114 is connected to the second output port feeder 5 through a fifth dc blocking capacitor 85, and the other end of the fourth varactor 114 is connected to the fourth dc voltage loading point 104 through a fifth isolation resistor 75;
one end of the fifth varactor 115 is connected to the first output port feeder 4 through the sixth blocking capacitor 86, and the other end of the fifth varactor 115 is connected to the fifth dc voltage loading point 105 through the sixth isolation resistor 76.
In this embodiment, the lengths of the first quarter-wavelength transmission line 61, the third quarter-wavelength transmission line 63, and the first varactor 111 of the parallel L C resonator 6 determine the position of one pole, the lengths of the first quarter-wavelength transmission line 61, the third quarter-wavelength transmission line 63, and the fifth quarter-wavelength transmission line 65 of the parallel L C resonator 6 and the lengths of the first varactor 111 and the third varactor 113 determine the position of the other pole, the lengths of the first varactor 111, the third varactor 113, and the fifth quarter-wavelength transmission line 65 determine the position of a zero, and the lengths of the first quarter-wavelength transmission line 61, the third quarter-wavelength transmission line 63, and the fifth quarter-wavelength transmission line 65 and the lengths of the first varactor 111 and the third varactor 113 can be adjusted to change the bandwidth and the center frequency of the initial passband.
By changing the dc voltage values of the first dc voltage loading point 101, the second dc voltage loading point 102, the third dc voltage loading point 103, the fourth dc voltage loading point 104, and the fifth dc voltage loading point 105, the resonant frequency can be changed by changing the capacitance values of the equivalent capacitances of the first varactor diode 111, the second varactor diode 112, and the third varactor diode 113, and the first dc blocking capacitor 81, the second dc blocking capacitor 82, and the third dc blocking capacitor 83, which are loaded at the end points of the third quarter-wavelength transmission line 63 and the fourth quarter-wavelength transmission line 64 of the parallel L C resonator 6.
The ratio of the equivalent capacitance capacities of the fourth dc blocking capacitor 85 and the fourth varactor 114 to the equivalent capacitance capacities of the fifth dc blocking capacitor 85 and the fifth varactor 115 determines the output power-dividing ratio. The output power ratio of the element can be changed by adjusting the capacities of the fourth isolation capacitor 84, the fourth varactor diode 114, the fifth blocking capacitor 85 and the fifth varactor diode 115.
By changing the dc voltage values of the fourth dc voltage load point 104 and the fifth dc voltage load point 105, the equivalent capacitance capacities of the fourth dc blocking capacitor 84, the fourth varactor diode 114, the fifth dc blocking capacitor 85, and the fifth varactor diode 115 are changed, and the output power ratio of the elements can be changed. In addition, the first isolation resistor 71 has a large influence on the isolation between the two output ports, and the optimal isolation can be obtained by adjusting the resistance value of the isolation resistor.
The reconfigurable power division filter utilizes the indirect isolation resistance of an output line, has good isolation degree, is suitable for a modern wireless communication system, and shares the same filtering part through double-path output, so that the using number of the variable capacitance diodes can be reduced, the size is reduced, and the production cost is reduced.
The structure of this embodiment is shown in fig. 1, the top view is shown in fig. 2, the relevant dimensional specifications are shown in fig. 3, the relative dielectric constant of the dielectric substrate 7 used is 3.55, the thickness is 0.508mm, and the loss tangent is 0.0027, in combination with fig. 3, the dimensional parameters of the reconfigurable power division filter are L-4, L-4, L-3.32, L-9.48, L-4-3, L-6, W0-1.12, W1-0.7, W2-0.27, W3-0.21, R0-123 Ω, Rb-123, Cb-100 Ω pF., the variable capacitance diode model D1 is SMW1, D2 is reconfigurable SMW2019, D20148 is SMW2019, Rb-55, λ 5817, λ 27, λ, length, λ, 5, equivalent to the total length, equivalent to the minimum guiding band width, equivalent to the length, equivalent to the.
The work reconfigurable sub-filter of the embodiment is simulated by joint modeling in electromagnetic simulation software HFSS.13.0 and ADS 2017. Fig. 4a and 4b are simulation diagrams of S parameters of the reconfigurable power division filter in this example, and it can be seen from the diagrams that the adjustable range of the passband center frequency of the reconfigurable power division filter is 1.00GHz-1.90GHz, and the output power division ratio can be from 1: 1, adjusting to 1: 2.8.
fig. 5a and 5b are simulation graphs of S-parameters of matching characteristics and isolation characteristics of two power output ports of the reconfigurable power division filter in the present example, and it can be seen from the graphs that return loss of the output ports in the pass band of the power division filter in the present example is lower than 19dB, and isolation in the pass band is better than 20 dB.
In summary, in the power division filter using the L C resonators connected in parallel according to this embodiment, by using the output port to indirectly isolate the resistor, and the two outputs share the electromagnetic double coupling between the two L C resonators, a power division filter having a compact structure, low loss, high selectivity, good isolation, a small number of diodes, and good out-of-band rejection performance is implemented.
The present invention provides a concept and a method of a reconfigurable power division filter, and a plurality of methods and ways for implementing the technical solution are provided, the above description is only a preferred embodiment of the present invention, it should be noted that, for those skilled in the art, a plurality of improvements and modifications may be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (8)
1. The reconfigurable power division filter is characterized by comprising a dielectric substrate (1), wherein a metal grounding plate (2) is arranged on the bottom surface of the dielectric substrate (1), an input port feeder (3), a first output port feeder (4) and a second output port feeder (5) are arranged on the upper surface of the dielectric substrate (1), a parallel L C resonator (6) is arranged between the input port feeder (3) and the first output port feeder (4) and between the input port feeder and the second output port feeder (5), and a first isolation resistor (71) is arranged between the first output port feeder (4) and the second output port feeder (5).
2. The reconfigurable power division filter according to claim 1, wherein the input port feeder (3) comprises a first 50 ohm microstrip conduction band (31), a first impedance matching line (32) and a first dc blocking capacitor (81), one end of the first 50 ohm microstrip conduction band (31) extends to the first side (1001) of the dielectric substrate (1), the other end of the first 50 ohm microstrip conduction band (31) is connected with one end of the first impedance matching line (32), and the other end of the first impedance matching line (32) is connected with the first dc blocking capacitor (81).
3. The reconfigurable power division filter according to claim 2, wherein the first output port feeder (4) comprises a second 50 ohm microstrip line conduction band (41) and a second impedance matching line (42) which are connected in sequence, one end of the second 50 ohm microstrip line conduction band (41) extends to the second side edge (1002) of the dielectric substrate (1), and the other end of the second 50 ohm microstrip line conduction band (41) is connected with the second impedance matching line (42).
4. The reconfigurable power division filter according to claim 3, wherein the second output port feeder (5) comprises a third 50 ohm microstrip line conduction band (51) and a third impedance matching line (52) which are connected in sequence, one end of the third 50 ohm microstrip line conduction band (51) extends to the second side edge (1002) of the dielectric substrate (1), and the other end of the third 50 ohm microstrip line conduction band (51) is connected with the third impedance matching line (52).
5. The reconfigurable power division filter according to claim 4, wherein the parallel L C resonator (6) comprises a first quarter-wavelength transmission line (61), a second quarter-wavelength transmission line (62), a third quarter-wavelength transmission line (63) and a fourth quarter-wavelength transmission line (64), the first quarter-wavelength transmission line (61) and the third quarter-wavelength transmission line (63) are located on the same straight line, the second quarter-wavelength transmission line (62) and the fourth quarter-wavelength transmission line (64) are located on the same straight line, the straight line of the first quarter-wavelength transmission line (61) is parallel to the straight line of the second quarter-wavelength transmission line (62), and the first quarter-wavelength transmission line (61), the second quarter-wavelength transmission line (62), the third quarter-wavelength transmission line (63) and the fourth quarter-wavelength transmission line (64) are connected to each other through a fifth quarter-wavelength transmission line (65).
6. The reconfigurable power division filter according to claim 5, wherein the first quarter-wave transmission line (61) is connected at one end to a metallic ground plane (2) by a first ground post (91); one end of the second quarter-wave transmission line (62) is connected to the metal grounding plate (2) through a second grounding column (92); one end of the third quarter-wavelength transmission line (63) is connected with a second direct-current blocking capacitor (82), one end of the second direct-current blocking capacitor (82) is connected with a first direct-current voltage loading point (101) through a second isolation resistor (72), the other end of the second direct-current blocking capacitor (82) is connected with a third grounding column (93) through a first variable capacitance diode (111), and the third grounding column (93) is connected to the metal grounding plate (2); one end of the fourth quarter-wavelength transmission line (64) is connected with a third blocking capacitor (83), one end of the third blocking capacitor (83) is connected with a second direct-current voltage loading point (102) through a third isolation resistor (73), the other end of the third blocking capacitor (83) is connected with a fourth grounding column (94) through a second variable capacitance diode (112), and the fourth grounding column (94) is connected to the metal grounding plate (2).
7. The reconfigurable power division filter according to claim 4, wherein a first quarter-wavelength transmission line (61), a second quarter-wavelength transmission line (62), a third quarter-wavelength transmission line (63) and a fourth quarter-wavelength transmission line (64) are interconnected by a fifth quarter-wavelength transmission line (65), and one end of the fifth quarter-wavelength transmission line (65) is connected to a fourth isolation resistor (74), the fourth isolation resistor (74) being connected to the metal ground plane (2) through a fifth ground pillar (95); the other end of the third quarter-wavelength transmission line (63) is connected with a fourth blocking capacitor (84), one end of the fourth blocking capacitor (84) is connected with a third direct-current voltage loading point (103) through a seventh isolation resistor (77), and the other end of the fourth blocking capacitor (84) is connected with a fourth quarter-wavelength transmission line (64) through a third variable capacitance diode (113).
8. The reconfigurable power division filter according to claim 6, wherein the second quarter-wave transmission line (62) and the fourth quarter-wave transmission line (64) are connected to a fourth varactor diode (114) and a fifth varactor diode (115), respectively; one end of the fourth variable capacitance diode (114) is connected to the second output port feeder line (5) through a fifth direct current blocking capacitor (85), and the other end of the fourth variable capacitance diode (114) is connected to a fourth direct current voltage loading point (104) through a fifth isolation resistor (75);
one end of the fifth variable capacitance diode (115) is connected to the first output port feeder line (4) through a sixth blocking capacitor (86), and the other end of the fifth variable capacitance diode (115) is connected to a fifth direct-current voltage loading point (105) through a sixth isolation resistor (76).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178701A (en) * | 2021-05-14 | 2021-07-27 | 西安电子科技大学 | Luneberg lens feed source antenna based on directional diagram is reconfigurable |
| CN114335952A (en) * | 2021-12-29 | 2022-04-12 | 重庆两江卫星移动通信有限公司 | Filtering power divider with reconfigurable phase difference and distribution ratio and antenna system |
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| CN104733813A (en) * | 2015-03-16 | 2015-06-24 | 华南理工大学 | Broadband bandpass filter with frequency and bandwidth reconfigurable |
| CN110474138A (en) * | 2019-08-29 | 2019-11-19 | 南京智能高端装备产业研究院有限公司 | A kind of restructural function filter-divider |
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| CN104733813A (en) * | 2015-03-16 | 2015-06-24 | 华南理工大学 | Broadband bandpass filter with frequency and bandwidth reconfigurable |
| CN110474138A (en) * | 2019-08-29 | 2019-11-19 | 南京智能高端装备产业研究院有限公司 | A kind of restructural function filter-divider |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178701A (en) * | 2021-05-14 | 2021-07-27 | 西安电子科技大学 | Luneberg lens feed source antenna based on directional diagram is reconfigurable |
| CN114335952A (en) * | 2021-12-29 | 2022-04-12 | 重庆两江卫星移动通信有限公司 | Filtering power divider with reconfigurable phase difference and distribution ratio and antenna system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111490320B (en) | 2022-06-07 |
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