CN107069164B - Substrate integrated slot line waveguide combined transmission line - Google Patents
Substrate integrated slot line waveguide combined transmission line Download PDFInfo
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- CN107069164B CN107069164B CN201710054650.8A CN201710054650A CN107069164B CN 107069164 B CN107069164 B CN 107069164B CN 201710054650 A CN201710054650 A CN 201710054650A CN 107069164 B CN107069164 B CN 107069164B
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- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/16—Dielectric waveguides, i.e. without a longitudinal conductor
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Abstract
A substrate integrated slot line waveguide combined transmission line relates to a transmission line, which consists of a dielectric substrate (1), an upper left polar plate (11) and an upper right polar plate (12) which are arranged on the dielectric substrate (1), and a lower left polar plate (13) and a lower right polar plate (14) which are arranged under the dielectric substrate (1); the left metalized via hole array (21) penetrates through the dielectric substrate (1) to connect the upper left polar plate (11) and the lower left polar plate (13) to form a substrate integrated waveguide (52); the upper right polar plate (12), the lower right polar plate (14) and a right metalized through hole array (22) for connecting the upper right polar plate and the lower right polar plate form a double-sided slot line (51) together with the lower left polar plate (13), the lower right polar plate (14) and the left metalized through hole array (21). The transmission line can support transmission of two horizontal and vertical polarization modes, wherein the characteristic impedance and phase speed of the double-sided slot line are wide in adjustable range and large in power capacity, and requirements of characteristic impedance and element packaging on gap spacing can be met simultaneously.
Description
Technical Field
The invention relates to a radio frequency microwave planar transmission line, in particular to a substrate integrated slot line waveguide combined transmission line.
Background
The transmission line is the most basic element in radio frequency microwave, and not only can transmit radio frequency microwave signals, but also can form radio frequency microwave components, such as impedance transformers, directional couplers, filters and the like. The slot line is a common planar transmission line and has the advantages of simple structure and wide working frequency range. However, the coupling capacitance at two sides of the slot line gap is provided by the edge capacitance, and the coupling capacitance at the edge is relatively small, so that compared with a microstrip line with relatively large coupling capacitance, the characteristic impedance of the slot line is relatively large, generally more than one hundred ohms, and thus, the use is inconvenient in a system with 50 ohms. In order to maintain the characteristic impedance of the slot line at around 50 ohms, the slot pitch of the slot line is generally narrow. When the gap is narrow, the relative error of the common PCB process is larger, the deviation of the characteristic impedance of the slot line is larger, and the narrow gap causes the reduction of power capacity, so that the slot line is not suitable for occasions with high-power application. On the other hand, it is sometimes necessary for the component to bridge both ends of the slot line, and the component package size of the surface mount is generally customized, so that the situation that the slot pitch required by the component package size is inconsistent with the slot pitch required by the characteristic impedance of the slot line often occurs, and the performance of the system is affected.
In radio frequency microwave systems, transmission lines of two different polarization types, horizontal and vertical, are sometimes required, especially in systems with multi-polarization or circularly polarized antennas. Generally, microstrip and substrate integrated waveguides are vertical polarization type transmission lines, and slot lines and coplanar waveguides are horizontal polarization type transmission lines, and the two types of transmission lines are separated in a system, which results in the system becoming bulky.
Disclosure of Invention
The invention aims to provide a substrate integrated slot line waveguide combined transmission line which is required to support mode transmission of horizontal and vertical polarization types; the characteristic impedance and phase speed adjustable range of the horizontal polarization transmission slot line is wide, the power capacity is large, and the requirements of the characteristic impedance and element packaging on the gap distance can be met.
The technical scheme is as follows: the substrate integrated slot line waveguide combined transmission line comprises a dielectric substrate, an upper left polar plate, an upper right polar plate, a lower left polar plate and a lower right polar plate, wherein the upper left polar plate, the upper right polar plate, the lower left polar plate and the lower right polar plate are arranged on two sides of the dielectric substrate; an upper left polar plate and an upper right polar plate are arranged on the dielectric substrate, the edges of the upper left polar plate and the upper right polar plate are parallel, and an upper gap is formed between the edges of the upper left polar plate and the upper right polar plate; a lower left polar plate and a lower right polar plate are arranged below the dielectric substrate, the edges of the lower left polar plate and the lower right polar plate are parallel, and a lower gap is formed between the edges of the lower left polar plate and the lower right polar plate; the left metalized via array is parallel to the right metalized via array, the left metalized via array penetrates through the dielectric substrate and is connected with the upper left polar plate and the lower left polar plate, and the right metalized via array penetrates through the dielectric substrate and is connected with the upper right polar plate and the lower right polar plate;
the upper left polar plate, the lower left polar plate and the left metallized through hole array are electrically connected and form a left polar plate of the substrate integrated slot line waveguide combined transmission line together; the upper right polar plate, the lower right polar plate and the right metalized through hole array are electrically connected to form a right polar plate of the substrate integrated slot line waveguide combined transmission line; the left polar plate, the right polar plate, and the dielectric substrates between the left polar plate and the right polar plate together form a double-sided slot line of the substrate integrated slot line waveguide combined transmission line;
the upper left polar plate, the lower left polar plate, the left metalized via hole array, and the dielectric substrate between the upper left polar plate and the lower left polar plate form the substrate integrated waveguide of the substrate integrated slot line waveguide combined transmission line together.
The characteristic impedance of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the upper gap between the edges of the upper left polar plate and the upper right polar plate; the characteristic impedance and phase velocity of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the lower gap between the edges of the lower left polar plate and the lower right polar plate.
The characteristic impedance and the phase speed of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the distance between the left metalized via array and the right metalized via array; the characteristic impedance and the phase speed of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the distance between the adjacent metallized through holes in the left metallized through hole array and the right metallized through hole array.
The characteristic impedance and phase velocity of the substrate integrated waveguide of the substrate integrated slot line waveguide combined transmission line can be finely adjusted by changing the distance between the adjacent metallized through holes in the left metallized through hole array.
The width of the upper left polar plate and the lower left polar plate from the left metalized through hole array to the left side in the direction deviating from the double-sided slot line is larger than a quarter of the working wavelength of a signal transmitted by the substrate integrated waveguide.
In the metalized via array, the pitch of adjacent metalized vias is less than one tenth of a wavelength.
The left polar plate and the right polar plate are not electrically connected, so that the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can transmit signals from direct current to radio frequency microwave, and the transmission mode of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line is horizontally polarized. And the substrate integrated slot line waveguide combined transmission line has a vertically polarized substrate integrated waveguide transmission mode.
The characteristic impedance and phase velocity of a transmission line are related to the coupling capacitance between the two plates of the transmission line. The larger the coupling capacitance, the lower the characteristic impedance. The coupling capacitance of the common slot line transmission line is provided only by the fringe capacitance between the slots, and the slot capacitance is relatively small, so that the characteristic impedance of the common slot line is difficult to be small. The coupling capacitance of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line is composed of three parts: the edge capacitance of an upper gap between the edges of the upper left polar plate and the upper right polar plate, the edge capacitance of a lower gap between the edges of the lower left polar plate and the lower right polar plate and the capacitance between the two rows of metallized via hole arrays. Therefore, the characteristic impedance of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be made smaller or larger, and the adjustable range of the characteristic impedance of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line is wide. And similarly, the adjustable range of the phase speed of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line is wide.
In use, the upper gap distance between the edges of the upper left polar plate and the upper right polar plate can be fixedly changed to meet the requirement of the package size of the bridging element on the gap distance, at this time, the lower gap distance between the edges of the lower left polar plate and the lower right polar plate can be changed, or the distance between the left metalized via array and the right metalized via array can be changed, and the characteristic impedance and the phase velocity of the double-sided slot line of the substrate integrated slot line waveguide combined transmission line can be adjusted to meet the requirement of a system on the characteristic impedance or the phase velocity.
Has the advantages that: the substrate integrated slot line waveguide combined transmission line has the advantages that the transmission line can support transmission in a horizontal polarization mode and a vertical polarization mode, the characteristic impedance and phase speed of a double-sided slot line supporting transmission in the horizontal polarization mode are wide in adjustable range and large in power capacity, and requirements of characteristic impedance and element packaging on gap spacing can be met simultaneously.
Drawings
Fig. 1 is a schematic diagram of a substrate integrated slot line waveguide combined transmission line structure.
Fig. 2 is a schematic cross-sectional view of a substrate integrated slot line waveguide combined transmission line structure.
The figure shows that: the dielectric substrate 1, the upper left polar plate 11, the upper right polar plate 12, the lower left polar plate 13, the lower right polar plate 14, the left metalized via array 21, the right metalized via array 22, the upper slot 31, the lower slot, the double-sided slot line 51 and the substrate integrated waveguide 52.
Detailed Description
The invention is further illustrated by the following figures and examples.
The embodiment adopted by the invention is as follows: the substrate integrated slot line waveguide combined transmission line comprises a dielectric substrate 1, an upper left polar plate 11, an upper right polar plate 12, a lower left polar plate 13 and a lower right polar plate 14 which are arranged on two sides of the dielectric substrate 1; an upper left polar plate 11 and an upper right polar plate 12 are arranged on the dielectric substrate 1, the edges of the upper left polar plate 11 and the upper right polar plate 12 are parallel, and an upper gap 31 is arranged between the edges of the upper left polar plate 11 and the upper right polar plate 12; a lower left polar plate 13 and a lower right polar plate 14 are arranged below the dielectric substrate 1, the edges of the lower left polar plate 13 and the lower right polar plate 14 are parallel, and a lower gap 32 is arranged between the edges of the lower left polar plate 13 and the lower right polar plate 14; the left metalized via array 21 is parallel to the right metalized via array 22, the left metalized via array 21 penetrates through the dielectric substrate 1 to connect the upper left polar plate 11 and the lower left polar plate 13, and the right metalized via array 22 penetrates through the dielectric substrate 1 to connect the upper right polar plate 12 and the lower right polar plate 14;
the upper left polar plate 11, the lower left polar plate 13 and the left metallized through hole array 21 are electrically connected and form a left polar plate of the substrate integrated slot line waveguide combined transmission line together; the upper right plate 12, the lower right plate 14 and the right metalized via array 22 are electrically connected to form a right plate of the substrate integrated slot line waveguide combined transmission line; the left polar plate, the right polar plate, the dielectric substrate 1 between the left polar plate and the right polar plate form a double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line together;
the upper left polar plate 11, the lower left polar plate 13, the left metalized via array 21, and the dielectric substrate 1 between the upper left polar plate 11 and the lower left polar plate 13 together form a substrate integrated waveguide 52 of the substrate integrated slot line waveguide combined transmission line.
The characteristic impedance of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the upper gap 31 between the edges of the upper left polar plate 11 and the upper right polar plate 12; the characteristic impedance and phase velocity of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the lower gap 32 between the edges of the lower left plate 13 and the lower right plate 14.
The characteristic impedance and phase velocity of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the distance between the left metalized via array 21 and the right metalized via array 22; by changing the pitch of the adjacent metallized vias in the left metallized via array 21 and the right metallized via array 22, the characteristic impedance and phase velocity of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be adjusted.
The characteristic impedance and phase velocity of the substrate integrated waveguide 52 of the substrate integrated slot line waveguide combined transmission line can be fine-tuned by changing the pitch of adjacent metallized vias in the left metallized via array 21.
The width of the upper left plate 11 and the lower left plate 13 from the left metalized via array 21 to the left deviating from the direction of the double-sided slot line 51 is greater than a quarter of the operating wavelength of the signal transmitted by the substrate integrated waveguide 52.
In the left metalized via array 21 and the right metalized via array 22, the pitch of the adjacent metalized vias is less than one tenth of a wavelength.
The left plate and the right plate are not electrically connected, so that the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can transmit signals from direct current to radio frequency microwave, and the transmission mode of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line is horizontally polarized. And the substrate integrated slot line waveguide combined transmission line substrate integrated waveguide 52 transmission mode is vertically polarized.
The characteristic impedance and phase velocity of a transmission line are related to the coupling capacitance between the two plates of the transmission line. The larger the coupling capacitance, the lower the characteristic impedance. The coupling capacitance of the common slot line transmission line is provided only by the fringe capacitance between the slots, and the slot capacitance is relatively small, so that the characteristic impedance of the common slot line is difficult to be small. And the coupling capacitance of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line is composed of three parts: the fringe capacitance of the upper gap 31 between the edges of the upper left plate 11 and the upper right plate 12, the fringe capacitance of the lower gap 32 between the edges of the lower left plate 13 and the lower right plate 14, and the capacitance between the left metalized via array 21 and the right metalized via array 22. Therefore, the characteristic impedance of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be made smaller or larger, and the adjustable range of the characteristic impedance of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line is wide. Similarly, the adjustable range of the phase speed of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line is wide.
In use, the distance between the upper gap 31 between the edges of the upper left plate 11 and the upper right plate 12 can also be fixedly changed to meet the requirement of the package size of the cross-over component on the distance, at this time, the distance between the lower gap 32 between the edges of the lower left plate 13 and the lower right plate 14 or the distance between the left metalized via array 21 and the right metalized via array 22 can be changed, and the characteristic impedance and the phase velocity of the double-sided slot line 51 of the substrate integrated slot line waveguide combined transmission line can be adjusted to meet the requirement of a system on the characteristic impedance or the phase velocity.
The upper right polar plate 12, the lower right polar plate 14, the right metalized via array 22, the dielectric substrate 1 between the upper right polar plate 12 and the lower right polar plate 14 can also be formed into a substrate integrated waveguide, so that the substrate integrated groove line waveguide combined transmission line can have three transmission line structures simultaneously: a double-sided slot line and two substrate integrated waveguides.
In terms of process, the substrate integrated slot line waveguide combined transmission line can be realized by adopting a common Printed Circuit Board (PCB) process, a low temperature co-fired ceramic (LTCC) process or integrated circuit processes such as CMOS (complementary metal oxide semiconductor), Si substrate and the like. The left metalized via array 21 and the right metalized via array 22 may be hollow metal vias or solid metal vias, and the shape of the metal vias may be circular, square or other shapes.
The present invention can be realized in light of the above.
Claims (5)
1. A substrate integrated slot line waveguide combined transmission line is characterized by comprising a dielectric substrate (1), an upper left polar plate (11), an upper right polar plate (12), a lower left polar plate (13) and a lower right polar plate (14) which are arranged on two sides of the dielectric substrate (1); an upper left polar plate (11) and an upper right polar plate (12) are arranged on the dielectric substrate (1), the edges of the upper left polar plate (11) and the upper right polar plate (12) are parallel, and an upper gap (31) is arranged between the edges of the upper left polar plate (11) and the upper right polar plate (12); a lower left polar plate (13) and a lower right polar plate (14) are arranged below the dielectric substrate (1), the edges of the lower left polar plate (13) and the lower right polar plate (14) are parallel, and a lower gap (32) is arranged between the edges of the lower left polar plate (13) and the lower right polar plate (14); the left metalized via array (21) is parallel to the right metalized via array (22), the left metalized via array (21) penetrates through the dielectric substrate (1) to connect the upper left electrode plate (11) and the lower left electrode plate (13), and the right metalized via array (22) penetrates through the dielectric substrate (1) to connect the upper right electrode plate (12) and the lower right electrode plate (14);
the upper left polar plate (11), the lower left polar plate (13) and the left metalized through hole array (21) are electrically connected and form a left polar plate of the substrate integrated slot line waveguide combined transmission line together; the upper right polar plate (12), the lower right polar plate (14) and the right metalized through hole array (22) are electrically connected and form a right polar plate of the substrate integrated slot line waveguide combined transmission line together; the left polar plate, the right polar plate, the dielectric substrate (1) between the left polar plate and the right polar plate form a double-sided slot line (51) of the substrate integrated slot line waveguide combined transmission line together;
the upper left polar plate (11), the lower left polar plate (13), the left metalized via hole array (21) and the medium between the upper left polar plate (11) and the lower left polar plate (13) of the medium substrate (1) form a substrate integrated waveguide (52) of the substrate integrated slot line waveguide combined transmission line;
the left polar plate and the right polar plate are not electrically connected, and the substrate integrated slot line waveguide combined transmission line can simultaneously support transmission in horizontal and vertical polarization modes; the double-sided slot line (51) of the substrate integrated slot line waveguide combined transmission line can transmit signals from direct current to radio frequency microwave, and the transmission mode of the double-sided slot line (51) is horizontally polarized; substrate integrated slot line waveguide the transmission mode of the substrate integrated waveguide (52) of the combined transmission line is vertically polarized.
2. The integrated slotline waveguide combined transmission line of claim 1, wherein the characteristic impedance of the double-sided slotline (51) of the integrated slotline waveguide combined transmission line of the substrate is adjusted by changing the upper gap (31) between the edges of the upper left plate (11) and the upper right plate (12) through the upper gap (31); the characteristic impedance and the phase speed of a double-sided slot line (51) of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing a lower gap (32) between the edges of the lower left polar plate (13) and the lower right polar plate (14).
3. The substrate integrated slot line waveguide combined transmission line according to claim 1, wherein the distance between the left metalized via array (21) and the right metalized via array (22) is changed to adjust the characteristic impedance and phase velocity of the double-sided slot line (51) of the substrate integrated slot line waveguide combined transmission line; the characteristic impedance and the phase speed of the double-sided slot line (51) of the substrate integrated slot line waveguide combined transmission line can be adjusted by changing the distance between the adjacent metallized through holes in the left metallized through hole array (21) and the right metallized through hole array (22).
4. The integrated slotline waveguide combined transmission line according to claim 1, wherein the left metallized via array (21) is capable of fine tuning the characteristic impedance and phase velocity of the integrated waveguide (52) of the integrated slotline waveguide combined transmission line by changing the pitch of adjacent metallized vias.
5. The integrated substrate slot line waveguide combined transmission line of claim 1, wherein the upper left plate (11) and the lower left plate (13) have the same width from the left metalized via array (21) to the left to the end of the plates, and the width is greater than one quarter of the operating wavelength of the signal transmitted by the integrated substrate waveguide (52) according to the impedance requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710054650.8A CN107069164B (en) | 2017-01-24 | 2017-01-24 | Substrate integrated slot line waveguide combined transmission line |
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| CN201710054650.8A CN107069164B (en) | 2017-01-24 | 2017-01-24 | Substrate integrated slot line waveguide combined transmission line |
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| CN107069164A CN107069164A (en) | 2017-08-18 |
| CN107069164B true CN107069164B (en) | 2020-05-01 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108550969A (en) * | 2018-05-25 | 2018-09-18 | 深圳市深大唯同科技有限公司 | A kind of tunable dielectric integrated RF transmission line, coupler and feeding network |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680136A (en) * | 2016-03-21 | 2016-06-15 | 南京邮电大学 | Transition circuit from coplanar waveguide to groove line and to substrate integrated non-radiation dielectric waveguides |
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- 2017-01-24 CN CN201710054650.8A patent/CN107069164B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680136A (en) * | 2016-03-21 | 2016-06-15 | 南京邮电大学 | Transition circuit from coplanar waveguide to groove line and to substrate integrated non-radiation dielectric waveguides |
Non-Patent Citations (1)
| Title |
|---|
| Postwall Slotline and Its Application in Design of Short-Pulse Tapered Slot Antennas;Shunli Li等;《IEEE Transactions on Antennas and Propagation》;20150831;3400-3409 * |
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