CN103050754A - Microstrip line-coplanar stripline broadband transitional structure - Google Patents
Microstrip line-coplanar stripline broadband transitional structure Download PDFInfo
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- CN103050754A CN103050754A CN2012105867362A CN201210586736A CN103050754A CN 103050754 A CN103050754 A CN 103050754A CN 2012105867362 A CN2012105867362 A CN 2012105867362A CN 201210586736 A CN201210586736 A CN 201210586736A CN 103050754 A CN103050754 A CN 103050754A
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- microstrip line
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Abstract
The invention relates to a microstrip line-coplanar stripline broadband transitional structure, which consists of a microstrip line conduction band, a coplanar stripline, a microstrip line ground plate and a circuit substrate, wherein the microstrip line conduction band is located on the front of the circuit substrate, and the coplanar stripline and the microstrip line ground plate are integrally formed on the back of the circuit substrate; the coplanar stripline and the microstrip line conduction band are stereoscopically and vertically crossed, so that a stereoscopic and vertical intersection is formed; the microstrip line conduction band consists of a microstrip line input/output port, a microstrip line conduction band transmission section, a finite ground microstrip line conduction band transitional section, the stereoscopic and vertical intersection and a finite ground microstrip line conduction band open circuit end which are sequentially arranged; the microstrip line ground plate is provided with a finite ground microstrip line ground plate transitional section and a finite ground microstrip line ground plate; one end of the coplanar stripline is a coplanar stripline input/output port, and the other end of the coplanar stripline is a coplanar stripline short circuit end. The microstrip line-coplanar stripline broadband transitional structure has the advantages of small size, compact circuit structure and little high-frequency insertion loss.
Description
Technical field
The present invention relates to the microwave passive component technical field, particularly a kind of broadband transition structure of microstrip line coplanar stripline.
Background technology
In the field of antenna, dipole antenna belongs to the balanced type antenna, and dipole antenna needs balanced transmission line such as coplanar stripline to come feed.Coplanar stripline is a kind of single face transmission line of balance, has size little, is easy to the advantages such as integrated.And the most frequently used signal transmssion line is microstrip line in the microwave current integrated circuit (IC) design, and this is a kind of non-balanced transmission line, so we must carry out the conversion between the balanced-unbalanced transmission line when the designing integrated circuit system.Based on this background, we need to design, and a kind of loss is low, size is little, the broadband transition structure of microstrip line coplanar stripline.
Existing bibliographical information the transition structure of microstrip line to coplanar stripline:
Document 1 (Y.Qian and T.Itoh, A broadband uniplanar microstrip-to-CPS transition, 1997Asia Pacific Microwave Conf.Dig., 1997:609-612) use T-section power splitter and 180 degree phase shifters to realize the transition structure of microstrip line to coplanar stripline.
Document 2 (Y.-H.Suh and K.Chang, A wideband coplanar stripline to microstrip transition, IEEE Microwave Wireless Compon.Lett., 2001 (11): microstrip line is based on a matching principle realization to the transition structure of coplanar stripline 28-29).
Document 3 (W.-H.Tu and K.Chang, Wide-band microstrip-to-coplanar stripline/slotlinetransitions, IEEE Trans.Microw.Theory Tech., 2006 (54): be to use Chebyshev transformation device and the fan-shaped matching stub of quarter-wave to realize that microstrip line is to the transition structure of coplanar stripline 1084-1089).
(1) document 1,2, and three kinds of microstrip lines that propose in 3 are larger at the insertion loss of high frequency treatment to the transition structure of coplanar stripline.
(2) in the document 2,3 microstrip line to the transition structure of coplanar stripline owing to having used a matching section and impedance matching section, have the large shortcoming of size.
Summary of the invention
The broadband transition structure that the purpose of this invention is to provide microstrip line-coplanar stripline that a kind of size is little, circuit structure is compact, the high frequency insertion loss is little.
Realize that technical solution of the present invention is: a kind of broadband transition structure of microstrip line coplanar stripline, in comprising microstrip line conduction band, coplanar stripline, microstrip line floor, circuit substrate, microstrip line conduction band and microstrip line floor form microstrip line, wherein the microstrip line conduction band is positioned at the front of circuit substrate, and coplanar stripline and microstrip line floor integrated molding are positioned at the reverse side of circuit substrate; The three-dimensional square crossing of coplanar stripline and microstrip line conduction band, the groove of coplanar stripline and microstrip line conduction band form three-dimensional square crossing place.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described microstrip line conduction band comprise in turn the microstrip line input/output port that arranges, microstrip line conduction band span line, limitedly microstrip line conduction band changeover portion, three-dimensional square crossing place, microstrip line conduction band open end limitedly; Wherein microstrip line conduction band span line one end links to each other with the microstrip line input/output port, and the other end links to each other with microstrip line conduction band changeover portion limitedly, and width is consistent with the microstrip line input/output port; Limitedly microstrip line conduction band changeover portion is from the end that links to each other with microstrip line conduction band span line to three-dimensional square crossing, and by wide to narrow even gradual change; Limitedly microstrip line conduction band open end begins to the end of microstrip line conduction band from three-dimensional square crossing.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described coplanar stripline is positioned at limitedly microstrip line floor changeover portion and the limitedly centre on microstrip line floor, and perpendicular to limitedly microstrip line floor changeover portion and limitedly microstrip line floor, one end of coplanar stripline is the coplanar stripline input/output port, is the coplanar stripline short-circuit end through the other end after three-dimensional square crossing place.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described microstrip line floor is at the reverse side of circuit substrate and along the direction identical with the microstrip line conduction band: wherein the microstrip line floor is made as limitedly microstrip line floor changeover portion with the vertical corresponding part of microstrip line conduction band changeover portion limitedly, and the microstrip line floor is made as limitedly microstrip line floor with the vertical corresponding part of microstrip line conduction band open end limitedly.
The broadband transition structure of microstrip line-coplanar stripline of the present invention, described limitedly microstrip line conduction band changeover portion from microstrip line conduction band span line to three-dimensional square crossing by wide to narrow even gradual change, accordingly limitedly microstrip line floor changeover portion also by wide to narrow even gradual change.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described limitedly microstrip line conduction band open end and vertical corresponding limitedly microstrip line floor thereof all be rectangle, and limitedly the microstrip line floor extends to the edge of circuit substrate to three-dimensional square crossing place opposite direction straight line.
The present invention compared with prior art, its remarkable advantage:
(1) intersection region of the present invention has the effect of pattern conversion and impedance transformation, need not to make use matching section and impedance matching section;
(2) can reduce physical dimension, so that simple circuit is compact;
(3) have advantages of that the high frequency insertion loss is low.
Description of drawings
Fig. 1 is the structural representation of the broadband transition structure of microstrip line coplanar stripline of the present invention.
Fig. 2 is the physical dimension schematic diagram of embodiment 1 of the broadband transition structure of microstrip line coplanar stripline of the present invention.
Fig. 3 is the S parameters simulation figure of embodiment 1 of the broadband transition structure of microstrip line coplanar stripline of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with Fig. 1, the front of circuit substrate is the diagonal line hatches filling part in the drawings, and the reverse side of circuit substrate is the dot-hatched filling part.The broadband transition structure of this microstrip line-coplanar stripline, comprise microstrip line conduction band 1, coplanar stripline 2, microstrip line floor 3, circuit substrate 4, microstrip line conduction band 1 and microstrip line floor 3 form microstrip line, wherein microstrip line conduction band 1 is positioned at the front of circuit substrate 4, coplanar stripline 2 and the microstrip line floor 3 one-body molded reverse side that are positioned at circuit substrate 4; Coplanar stripline 2 and the 1 three-dimensional square crossing of microstrip line conduction band, the groove 21 of coplanar stripline 2 forms three-dimensional square crossing place 5 with microstrip line conduction band 1.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described microstrip line conduction band 1 comprise in turn the microstrip line input/output port 10 that arranges, microstrip line conduction band span line 11, limitedly microstrip line conduction band changeover portion 12, three-dimensional square crossing place 5, microstrip line conduction band open end 13 limitedly; Wherein microstrip line conduction band span line 11 1 ends link to each other with microstrip line input/output port 10, and the other end links to each other with microstrip line conduction band changeover portion 12 limitedly, and width is consistent with microstrip line input/output port 10; Limitedly microstrip line conduction band changeover portion 12 is from the end that links to each other with microstrip line conduction band span line 11 to three-dimensional square crossing 5, and by wide to narrow even gradual change; Limitedly microstrip line conduction band open end 13 begins to the end of microstrip line conduction band 1 from three-dimensional square crossing 5.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described coplanar stripline 2 is positioned at limitedly microstrip line floor changeover portion 32 and the limitedly centre on microstrip line floor 33, and perpendicular to limitedly microstrip line floor changeover portion 32 and limitedly microstrip line floor 33, one end of coplanar stripline 2 is coplanar stripline input/output ports 22, is coplanar stripline short-circuit end 23 through the other end after three-dimensional square crossing place 5.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described microstrip line floor 3 is at the reverse side of circuit substrate 4 and along the direction identical with microstrip line conduction band 1: wherein microstrip line floor 3 is made as limitedly microstrip line floor changeover portion 32 with microstrip line conduction band changeover portion 12 vertical corresponding parts limitedly, and microstrip line floor 3 is made as limitedly microstrip line floor 33 with microstrip line conduction band open end 13 vertical corresponding parts limitedly.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described limitedly microstrip line conduction band changeover portion 12 from microstrip line conduction band span line 11 to three-dimensional square crossing 5 by wide to narrow even gradual change, accordingly limitedly microstrip line floor changeover portion 32 also by wide to narrow even gradual change.
The broadband transition structure of microstrip line coplanar stripline of the present invention, described limitedly microstrip line conduction band open end 13 and vertical corresponding limitedly microstrip line floor 33 thereof all be rectangle, and limitedly microstrip line floor 33 extends to the edge of circuit substrate 4 to three-dimensional square crossing place 5 opposite direction straight lines.Three-dimensional square crossing place 5 is near the limitedly microstrip line conduction band open end 13 of microstrip line conduction band 1, and the coplanar stripline short-circuit end 23 of close coplanar stripline 2.
The course of work of the broadband transition structure of microstrip line-coplanar stripline of the present invention is as follows: electromagnetic signal enters microstrip line 1 from microstrip line input/output port 10, through microstrip line conduction band span line 11, limitedly three-dimensional square crossing place 5 of microstrip line conduction band changeover portion 12 arrival, be coupled on the coplanar stripline 2, be transferred to coplanar stripline input/output port 22 along coplanar stripline 2.Same, when electromagnetic signal enters coplanar stripline 2 from coplanar stripline input/output port 22, be coupled to microstrip line 1 through three-dimensional square crossing place 5, be transferred to microstrip line input/output port 10 along limitedly microstrip line conduction band changeover portion 12, microstrip line conduction band span line 11, also can realize the transmission of electromagnetic signal.Microstrip line conduction band open end 13 length, coplanar stripline short-circuit end 23 length reach the limitedly size of microstrip line floor changeover portion 32 by regulating limitedly, can regulate position and the transiting performance of passband.
Structurally, the width of microstrip line input/output port 10 is determined according to the impedance of port, generally is designed to width corresponding to 50 ohm microstrip.The live width of coplanar stripline input/output port 22 and groove width are determined according to port Impedance, generally be designed to high characteristic impedance (such as 155 ohm) corresponding live width and groove width, it is consistent that the live width of the other parts of coplanar stripline 2 and groove width keep wearing together the shape line cap.Coplanar stripline 2 forms three-dimensional square crossing place 5 with microstrip line 1, and crossing angle is generally 90 degree, and the microstrip line conduction band width of three-dimensional square crossing place 5 has a determined value in order to guarantee best Energy Coupling, generally is different from microstrip line input/output port 10.Limitedly the width on microstrip line floor 33 and limitedly the width of microstrip line conduction band open end 13 keep consistent with three-dimensional square crossing place 5.Limitedly microstrip line conduction band changeover portion 12 from microstrip line conduction band span line 11 to three-dimensional square crossing 5 by wide to narrow even gradual change, accordingly limitedly microstrip line floor changeover portion 32 also by wide to narrow even gradual change, guarantee to realize the impedance matching of circuit.
On making, by printed-circuit board manufacturing technology the circuit in circuit substrate front and the circuit fabrication at the back side are formed required metal pattern.
Below in conjunction with specific embodiment the present invention is described in further detail.
In conjunction with Fig. 2, Fig. 3, take the broadband transition structure of microstrip line-coplanar stripline of being operated in 6.3-18GHz as example, circuit substrate 4 relative dielectric constants of employing are 2.33, and thickness is 0.508mm.10 characteristic impedances of microstrip line input/output port are 50 ohm, the width w1 of microstrip line input/output port 10 is 1.55mm, the characteristic impedance of coplanar stripline input/output port 22 is 155 ohm, and the live width w0 of coplanar stripline input/output port 22 correspondences is 1mm, and groove width s is 0.2mm.Three-dimensional square crossing place 5 for the Energy Coupling that makes microstrip line 1 in coplanar stripline 2, obtaining three-dimensional square crossing place 5 microstrip line conduction band width w4 by the HFSS of simulation software is 0.9mm.Limitedly changeover portion 32 length L 0 in microstrip line floor are 3.4mm, are that evenly to fade to width w3 be 2.8mm to 5mm by width w2.Limitedly microstrip line floor 33 width w5 are 1.5mm.
Limitedly the length of microstrip line conduction band open end 13 and coplanar stripline short-circuit end 23 has the effect of detail coupling: limitedly the length L 1 of microstrip line conduction band open end 13 correspondences is 4mm, i.e. limitedly microstrip waveguide wavelength corresponding to 1/4 centre frequency; The length L 2 of coplanar stripline short-circuit end 23 correspondences is 6mm, the coplanar stripline guide wavelength that 1/4 centre frequency is corresponding.
Fig. 3 is the S parameters simulation figure of the broadband transition structure of the present embodiment microstrip line-coplanar stripline, as can be seen from the figure, and in the 6.3-18GHz frequency range, insertion loss is less than 3dB, the feed port reflection coefficient is less than-13dB, and relative bandwidth is 96%, has advantages of that the high frequency insertion loss is low.
Claims (6)
1. the broadband transition structure of a microstrip line-coplanar stripline, it is characterized in that comprising microstrip line conduction band (1), coplanar stripline (2), microstrip line floor (3), circuit substrate (4), microstrip line conduction band (1) and microstrip line floor (3) form microstrip line, wherein microstrip line conduction band (1) is positioned at the front of circuit substrate (4), coplanar stripline (2) and microstrip line floor (3) one-body molded reverse side that is positioned at circuit substrate (4); Coplanar stripline (2) and the three-dimensional square crossing of microstrip line conduction band (1), the groove (21) of coplanar stripline (2) forms three-dimensional square crossing place (5) with microstrip line conduction band (1).
2. the broadband transition structure of microstrip line-coplanar stripline according to claim 1 is characterized in that: described microstrip line conduction band (1) comprises the microstrip line input/output port (10) that arranges in turn, microstrip line conduction band span line (11), limitedly microstrip line conduction band changeover portion (12), three-dimensional square crossing place (5), microstrip line conduction band open end (13) limitedly; Wherein microstrip line conduction band span line (11) one ends link to each other with microstrip line input/output port (10), and the other end links to each other with microstrip line conduction band changeover portion (12) limitedly, and width is consistent with microstrip line input/output port (10); Limitedly microstrip line conduction band changeover portion (12) is from the end that links to each other with microstrip line conduction band span line (11) to three-dimensional square crossing (5), and by wide to narrow even gradual change; Limitedly microstrip line conduction band open end (13) begins to the end of microstrip line conduction band (1) from three-dimensional square crossing (5).
3. the broadband transition structure of microstrip line-coplanar stripline according to claim 1, it is characterized in that: described coplanar stripline (2) is positioned at limitedly microstrip line floor changeover portion (32) and the limitedly centre of microstrip line floor (33), and perpendicular to limitedly microstrip line floor changeover portion (32) and limitedly microstrip line floor (33), one end of coplanar stripline (2) is coplanar stripline input/output port (22), is coplanar stripline short-circuit end (23) through the other end after three-dimensional square crossing place (5).
4. the broadband transition structure of microstrip line-coplanar stripline according to claim 1 and 2, it is characterized in that: described microstrip line floor (3) is at the reverse side of circuit substrate (4) and along the direction identical with microstrip line conduction band (1): wherein microstrip line floor (3) are made as limitedly microstrip line floor changeover portion (32) with the vertical corresponding part of microstrip line conduction band changeover portion (12) limitedly, and microstrip line floor (3) are made as limitedly microstrip line floor (33) with the vertical corresponding part of microstrip line conduction band open end (13) limitedly.
5. the broadband transition structure of microstrip line-coplanar stripline according to claim 4, it is characterized in that: described limitedly microstrip line conduction band changeover portion (12) from microstrip line conduction band span line (11) to three-dimensional square crossing (5) by wide to narrow even gradual change, accordingly limitedly microstrip line floor changeover portion (32) also by wide to narrow even gradual change.
6. the broadband transition structure of microstrip line-coplanar stripline according to claim 4, it is characterized in that: described limitedly microstrip line conduction band open end (13) and vertical corresponding limitedly microstrip line floor (33) thereof all are rectangle, and limitedly microstrip line floor (33) extend to the edge of circuit substrate (4) to three-dimensional square crossing place (5) reverse linear.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441318A (en) * | 2013-08-01 | 2013-12-11 | 南京理工大学 | Balun based on ultra-wideband gradual change from microstrip lines to coplanar striplines |
| CN106501840A (en) * | 2016-11-13 | 2017-03-15 | 中国科学院近代物理研究所 | One kind of proton heavy ion beam current longitudinal direction beam group shape measure detector |
| CN112510333A (en) * | 2020-11-25 | 2021-03-16 | 安徽四创电子股份有限公司 | Multilayer board cross wiring network |
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| CN203119073U (en) * | 2012-12-30 | 2013-08-07 | 南京理工大学 | Microstrip line-coplanar stripline broadband transition structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441318A (en) * | 2013-08-01 | 2013-12-11 | 南京理工大学 | Balun based on ultra-wideband gradual change from microstrip lines to coplanar striplines |
| CN103441318B (en) * | 2013-08-01 | 2016-09-21 | 南京理工大学 | Based on microstrip line to coplanar stripline super-broadband graded ground barron device |
| CN106501840A (en) * | 2016-11-13 | 2017-03-15 | 中国科学院近代物理研究所 | One kind of proton heavy ion beam current longitudinal direction beam group shape measure detector |
| CN112510333A (en) * | 2020-11-25 | 2021-03-16 | 安徽四创电子股份有限公司 | Multilayer board cross wiring network |
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