CN214797663U - Filter adopting annular microstrip patch resonator - Google Patents
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- CN214797663U CN214797663U CN202121003146.3U CN202121003146U CN214797663U CN 214797663 U CN214797663 U CN 214797663U CN 202121003146 U CN202121003146 U CN 202121003146U CN 214797663 U CN214797663 U CN 214797663U
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Abstract
The utility model provides an adopt wave filter of annular microstrip paster syntonizer, belongs to passive microwave device technical field, includes: the device is characterized by comprising a PCB mounting plate, an annular microstrip patch, a first slot line, a second slot line, an input channel and an output channel, wherein only two slot lines with set sizes are arranged on the annular microstrip patch, so that the filtering of alternating current signals from un-accessed use ends is realized; in addition, compared with other traditional microwave component devices in a micro-strip form, the internal space of the structure of the utility model can be better utilized and developed, which greatly reduces the specification of the appearance of the device; the utility model has better isolation between the output end interface and the input end interface, and realizes the integration of power distribution and a filter; finally, the utility model discloses the accessible sets up the slot line of setting for the size at annular microstrip paster, realizes the function of high order filter.
Description
Technical Field
The utility model relates to a passive microwave device technical field, especially an adopt wave filter of annular microstrip paster syntonizer.
Background
With the rapid development of mobile communication technology, a radio frequency front end with multiple frequency bands, multiple modes and reconfigurable functions becomes a current research hotspot. The filter is a key component of the radio frequency front end, but the traditional filter cannot meet the requirement of a complex communication environment. The switchable multi-frequency band-pass filter can selectively filter out useless signals, more flexibly meets the multiplexing requirement of a communication system, and reduces the design size and cost of the filter, so that the research of the switchable filter is more and more focused.
Currently, the mainstream filter switching method includes: the switching of a double pass band or a single pass band of the filter is realized by turning on or off the PIN diode; the switching from a three-frequency band to a double-frequency band and a single-frequency band is realized through a detuning technology; the switching of two frequency bands of 7.81GHz and 8.35GHz is realized by controlling the MEMS switch.
In summary, the conventional filter has a technical development bottleneck that the manufacturing is complicated and the triggering condition is harsh.
SUMMERY OF THE UTILITY MODEL
There is the complicated and harsh problem of trigger condition of preparation in order to solve current wave filter, the utility model provides an adopt wave filter of annular microstrip paster syntonizer.
A filter employing a ring microstrip patch resonator, the filter comprising: the device comprises a PCB mounting plate, an annular microstrip patch, a first slot line, a second slot line, an input channel and an output channel; the annular microstrip patch is attached to the PCB mounting plate; the input channel is arranged on the PCB mounting plate and is electrically communicated with the annular microstrip patch; the output channel is centrosymmetric relative to the input channel, is arranged on the PCB mounting plate and is electrically communicated with the annular microstrip patch; the first slot line and the input channel are arranged on the annular microstrip patch at a vertical angle; the second slot line is symmetrical about the center of the first slot line and is arranged on the annular microstrip patch.
Preferably, the first slot line and the second slot line have the same size, the length is 6.5mm, and the width is 1.0 mm.
Preferably, the diameter of the central circular hole of the annular microstrip patch is as follows: 4.5 mm.
Preferably, the filter further includes: a ground post; the grounding column is vertically arranged at the position of a central circular hole of the annular microstrip patch and grounds the annular microstrip patch.
Preferably, the annular microstrip patch further includes: a third slot line, a fourth slot line, a fifth slot line and a sixth slot line; the third slot line is arranged between the first slot line and the input channel and forms a first set angle with the input channel; the fifth slot line is arranged between the second slot line and the input channel and forms a second set angle with the input channel; the input channel and the output channel form a symmetry axis, and the fourth slot line and the third slot line are symmetrically arranged around the symmetry axis; the sixth slot line and the fifth slot line are symmetrically arranged about the symmetry axis.
Preferably, the first set angle is 20 °; the second set angle is 20 °.
Preferably, the first slot line and the second slot line have the dimensions of 8.0mm in length and 0.5mm in width; the third slot line and the fourth slot line are equal in size, and the width of the third slot line is 8.0mm and 0.5 mm; the fifth slot line and the sixth slot line are equal in size, and the width of the fifth slot line is 8.0mm and the width of the sixth slot line is 0.5 mm.
Preferably, the input channel is made of a conductive material with 50 ohms and is integrally formed with the annular microstrip patch; the output channel is made of 50 ohm conductive materials and is integrally formed with the annular microstrip patch.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an among the technical scheme: the device is characterized by comprising a PCB mounting plate, an annular microstrip patch, a first slot line, a second slot line, an input channel and an output channel, wherein only two slot lines with set sizes are arranged on the annular microstrip patch, so that the filtering of alternating current signals from un-accessed use ends is realized; in addition, compared with other traditional microwave component devices in a micro-strip form, the internal space of the structure of the utility model can be better utilized and developed, which greatly reduces the specification of the appearance in the period; the utility model has better isolation between the output end interface and the input end interface, and realizes the integration of power distribution and a filter; finally, the utility model discloses the accessible sets up the slot line of setting for the size at annular microstrip paster, realizes the function of high order filter.
Drawings
Fig. 1 is a schematic structural diagram of a second-order middle filter according to the present invention;
fig. 2 is a schematic diagram of the filtering effect of the middle-second order filter of the present invention;
fig. 3 is a schematic structural diagram of a third-order filter in the present invention;
fig. 4 is a schematic diagram of the filtering effect of the third-order filter of the present invention;
1-PCB mounting plate; 2-an annular microstrip patch; 3-a first slot line; 4-a second slot line; 5-an input channel; 6-an output channel; 7-a central circular hole; 8-a grounding post; 9-a third slotline; 10-a fourth slotline; 11-fifth slotline; 12-sixth slotline.
Detailed Description
Example one:
this example provides a second order filter that adopts annular microstrip paster syntonizer, and the schematic diagram of the structure of second order filter is shown in fig. 1, and second order filter in this embodiment includes upper circuit and ground mechanism, and the ground mechanism can be lower floor's metal ground plate or ground post 8 in this embodiment, upper circuit layer is located the superiors of whole PCB mounting panel 1, comprises following part: the input channel 5 and the output channel 6 are positioned on an upper circuit layer to form a central axis; the input channel 5 is used for connecting with an external testing device and accessing an input signal; the output end interface is connected with an external display device and used for outputting the filtered signals; the annular microstrip patch 2 is positioned in the middle of the PCB; a first slot line 3 of the annular microstrip patch 2 and a second slot line 4 of the annular microstrip patch 2 are positioned in the annular microstrip patch 2, one side of the first slot line is in tangent connection with the annular microstrip patch 2 for electric conduction, and the first slot line 3 and the second slot line 4 are symmetrically arranged around a central axis; in the present embodiment, the size of the first slot line 3 is 6.5mm × 1.0mm, the size of the second slot line 4 is 6.5mm × 1.0mm, the radius of the post 8 and the diameter of the central through hole 7 are 4.5mm, and the post 8 penetrates through the central through hole 7.
In this embodiment, the input interface is a 50 ohm microstrip conduction band, and the 50 ohm microstrip conduction band is input.
The second order filter in this embodiment filters the unprocessed electrical signal from the input port through the first slot line 3 and the second slot line 4, and filters the filtered electrical signal. Output through the output channel 6, as shown in fig. 2, where the abscissa is the time axis (in the unit of s), the ordinate is the frequency band (in the unit of dB), and the dashed line is the insertion loss and the solid line is the return loss; the return loss curve is filtered by the second-order filter in this embodiment when the insertion loss reaches the peak, and two troughs (as represented by the curve relationship in fig. 2 in the time period of 2.50-5.00) appear.
Example two
Based on the second-order filter provided in the first embodiment, in this embodiment, on the basis of the second-order filter, a third-order filter using an annular microstrip patch resonator is obtained by adding a set number of slot lines, and is used for processing electric signals carrying three different bandwidth signals. In this embodiment, a schematic structural diagram of the third-order filter is shown in fig. 3, a schematic filtering effect diagram of the third-order filter is shown in fig. 4, a third slot line 9 is disposed between the first slot line 3 and the input channel, a fourth slot line 10 and the third slot line 9 are symmetrical with respect to the central axis, and an included angle of 20 degrees is formed between the third slot line 9 and the central axis. The fifth slot line 11 of the annular microstrip patch 2 is located between the second slot line 4 and the input channel 5, the sixth slot line 12 and the fifth slot line 11 are symmetrical about the central axis, and the fifth slot line 11 and the central axis form an included angle of 20 degrees.
The input interface is an input 50 ohm microstrip line conduction band, one end of the input 50 ohm microstrip line conduction band extends to the left side edge of the upper circuit layer, and the other end of the input 50 ohm microstrip line conduction band is tangent to the annular microstrip patch 2.
The first output end interface is used for outputting a 50 ohm microstrip line conduction band, one end of the 50 ohm microstrip line conduction band is extended and connected to an external signal input circuit and used for receiving an external signal, and the other end of the 50 ohm microstrip line conduction band is tangent to the annular microstrip patch 2 and is electrically conducted.
The first wire grooves 3 are 6.5mm by 1.0mm in size, and the second wire grooves 4 are 6.5mm by 1.0mm in size; the third slot line 9 and the fourth slot line 10 have the same size, and the width of the third slot line is 8.0mm and 0.5 mm; the fifth slot line 11 and the sixth slot line 12 have the same size, and the width of the fifth slot line is 8.0mm and 0.5 mm.
The utility model discloses be through printed circuit board manufacturing process to the metal covering at the circuit substrate front and the back processing corruption in the manufacturing to formed metal pattern, this embodiment simple structure can realize, the integrated processing of being convenient for on the PCB board. Meanwhile, the design adopts the structure of the annular microstrip patch, and the circuit space is fully utilized, so that the occupied volume of the circuit is greatly reduced, and a third-order filter with good isolation characteristic is designed.
The underlying dielectric substrate used (designated by reference numeral 1 in FIG. 3) was R04003C matrix, and had a relative dielectric constant of 3.55, a thickness of 0.508mm, and a loss tangent of 0.0027.
The third order filter using the microstrip patch resonator of this example was modeled and simulated in the electromagnetic simulation software HFSS 17.0. Fig. 4 is an S-parameter simulation diagram of the pass band characteristic and isolation characteristic of the third-order filter using the microstrip patch resonator in this example, in which the abscissa is the time axis (in S) and the ordinate is the frequency band (in dB), as shown, the center frequency of the third-order filter using the microstrip patch resonator is 3.4438GHz, the 3-dB bandwidth is 2.0GHz, and the insertion loss is less than 0.1127dB in the pass band.
The annular microstrip patch has several resonance modes of the annular patch, and the electric field is distributed regularly at the corresponding resonance frequency. For the third order filter employing the microstrip patch resonator, the first and second slot lines affect the TM11 mode, defining three (what is TM) modes, the longer the slot line the lower the TM11 mode frequency. The first and second, third and fourth slotlines may all affect the TM31 mode, with the TM31 frequency being lower the longer the slotline, the TM21 mode remaining unchanged.
The utility model provides a method, the method of concrete realization this technical file and its way are many, above only the utility model discloses a preferred embodiment is worth pointing out, to technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improve and moist decorations, these are improved and moist look also regards as the utility model discloses a protection scope. All the components not specified in the present embodiment can be realized by the prior art.
Claims (8)
1. A filter employing a ring microstrip patch resonator, the filter comprising: the device comprises a PCB mounting plate (1), an annular microstrip patch (2), a first slot line (3), a second slot line (4), an input channel (5) and an output channel (6);
the annular microstrip patch (2) is attached to the PCB mounting plate (1);
the input channel (5) is arranged on the PCB mounting plate (1) and is electrically communicated with the annular microstrip patch (2); the output channel (6) is centrosymmetric with respect to the input channel (5), is arranged on the PCB mounting plate (1), and is electrically communicated with the annular microstrip patch (2);
the first slot line (3) and the input channel (5) are arranged on the annular microstrip patch (2) in a vertical angle; the second slot line (4) is centrosymmetric with respect to the first slot line (3) and is arranged on the annular microstrip patch (2).
2. A filter according to claim 1, characterised in that the first slot line (3) and the second slot line (4) are of the same size, 6.5mm in length and 1.0mm in width.
3. A filter according to claim 2, characterized in that the central circular hole (7) of the annular microstrip patch has a diameter of: 4.5 mm.
4. The filter of claim 3, further comprising: a ground post (8);
the grounding column (8) is vertically arranged at the position of a central round hole (7) of the annular microstrip patch (2) and grounds the annular microstrip patch (2).
5. The filter according to claim 1, characterized in that the annular microstrip patch (2) further comprises: a third slot line (9), a fourth slot line (10), a fifth slot line (11) and a sixth slot line (12);
the third slot line (9) is arranged between the first slot line (3) and the input channel (5) and forms a first set angle with the input channel (5); the fifth slot line (11) is arranged between the second slot line (4) and the input channel (5) and forms a second set angle with the input channel (5);
the input channel (5) and the output channel (6) form a symmetry axis, and the fourth slot line (10) and the third slot line (9) are symmetrically arranged around the symmetry axis;
the sixth slot line (12) and the fifth slot line (11) are arranged symmetrically with respect to the axis of symmetry.
6. The filter according to claim 5, wherein the first set angle is 20 °;
the second set angle is 20 °.
7. The filter of claim 5,
the first slot line (3) and the second slot line (4) have the dimensions of 8.0mm in length and 0.5mm in width;
the third slot line (9) and the fourth slot line (10) have the same size, the width of the third slot line is 8.0mm, and the width of the fourth slot line is 0.5 mm;
the fifth slot line (11) and the sixth slot line (12) are equal in size and are 8.0mm and 0.5mm in width.
8. A filter according to claim 1, characterised in that the input channel (5) is of 50 ohm conductive material and is provided integrally with the annular microstrip patch (2);
the output channel (6) is made of a 50-ohm conductive material and is integrally formed with the annular microstrip patch (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121003146.3U CN214797663U (en) | 2021-05-10 | 2021-05-10 | Filter adopting annular microstrip patch resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121003146.3U CN214797663U (en) | 2021-05-10 | 2021-05-10 | Filter adopting annular microstrip patch resonator |
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| Publication Number | Publication Date |
|---|---|
| CN214797663U true CN214797663U (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121003146.3U Expired - Fee Related CN214797663U (en) | 2021-05-10 | 2021-05-10 | Filter adopting annular microstrip patch resonator |
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| Country | Link |
|---|---|
| CN (1) | CN214797663U (en) |
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2021
- 2021-05-10 CN CN202121003146.3U patent/CN214797663U/en not_active Expired - Fee Related
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