CN203760598U - High-isolation slot wire duplexer applied to ultra-wideband channel and narrowband channel - Google Patents
High-isolation slot wire duplexer applied to ultra-wideband channel and narrowband channel Download PDFInfo
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- CN203760598U CN203760598U CN201420073671.6U CN201420073671U CN203760598U CN 203760598 U CN203760598 U CN 203760598U CN 201420073671 U CN201420073671 U CN 201420073671U CN 203760598 U CN203760598 U CN 203760598U
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- filter
- minor matters
- circuit minor
- duplexer
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Abstract
The utility model provides a high-isolation slot wire duplexer applied to an ultra-wideband channel and a narrowband channel. The high-isolation slot wire duplexer comprises a first filter and a second filter. The first filter and the second filter share one medium substrate and adopt a slotted line structure and a microstrip line structure. The slotted line structure is arranged at the lower layer of the medium substrate. The microstrip line structure is arranged at the upper layer of the medium substrate. Bandwidth of the first filter is controlled via coupling among a U-shaped slotted line resonator, a first open circuit branch knot and a second open circuit branch knot by adjusting distance g1 among the three; and the resonance mode of the second filter can be controlled via loading length of the branch knots so that bandwidth of the second filter can be adjusted via adjusting size of l5. The bandwidth of the two filters can be independently adjusted so that the high-isolation slot wire duplexer is compact in structure, simple in circuit and quite high in frequency selectivity.
Description
Technical field
The utility model relates to duplexer field, specifically a kind of height isolation line of rabbet joint duplexer that is applied to ultra broadband channel and arrowband channel.
Background technology
Microwave diplexer is a kind of important microwave device that is widely used in radio receiver, has been that modern multifrequency is served the shared vital parts with common antenna of receive-transmit system more, and the quality of its performance directly has influence on the service behaviour of radio-frequency front-end.Traditional duplexer design is first to design respectively two filters, then by a matching network, it is connected, and the existence of matching network has increased circuit size, is unfavorable for miniaturization.Accordingly, some scholars adopt common resonant device technology to replace matching network, although this has reduced circuit size greatly, this technology can only apply to narrowband systems, and bandwidth is difficult for regulating.The duplexer that designs a kind of compact that is applied to radio ultra wide band system is extremely necessary.
Utility model content
The utility model is in order to solve the problem that lacks ultra broadband channel line of rabbet joint duplexer in prior art, a kind of line of rabbet joint duplexer of the high-isolation that is applied to ultra broadband channel and arrowband channel is provided, and its bandwidth can independent regulation, compact conformation, circuit is simple, has very high frequency selectivity.
The utility model comprises the first filter and the second filter, the first filter and the second filter share a medium substrate, all adopt slotted line structure and microstrip line construction, slotted line structure is positioned at the lower floor of medium substrate, and microstrip line construction is positioned at the upper strata of medium substrate;
The slotted line structure of the first filter is U-shaped slotted line resonator; Microstrip line construction comprises: the first feeder line, the second feeder line, the first open circuit minor matters, the second open circuit minor matters, wherein the first feeder line adopts T-shaped shape, it is the common feeder of the first filter and the second filter, the first open circuit minor matters are connected to one end of the first feeder line T connector perpendicular, the second open circuit minor matters are connected to one end of the second feeder line perpendicular, two open circuit minor matters are parallel with two arms of U-shaped slotted line resonator respectively, and the spacing in two open circuit minor matters horizontal directions is adjustable, is designated as
g 1;
The slotted line structure of the second filter is multimode slotted line resonator, microstrip line construction comprises: the first feeder line, the 3rd feeder line, the first short circuit minor matters, the second short circuit minor matters, wherein the first short circuit minor matters are connected to the other end of the first feeder line T connector, and vertical with it, the second short circuit minor matters are connected to one end of the 3rd feeder line vertical with it; Multimode slotted line resonator adopts U-shaped structure, and its bosom position is loaded with slotted line minor matters, and the adjustable in length of slotted line minor matters, is designated as
l 5.
Described the first filter is three rank filters, and U-shaped slotted line resonator length is that the 1/2nd, first open circuit minor matters and the second open circuit minor matters of ultra broadband channel center frequency corresponding wavelength are quarter-wave resonance device.
In the second described filter, U-shaped slotted line resonator is 1/2nd of arrowband channel center frequency corresponding wavelength.
Described medium substrate is pcb board, comprises upper metal patch and the lower metal patch of dielectric substrate and coated dielectric substrate, and microstrip line construction is formed at metal patch, and slotted line structure is that lower metal patch etching forms.
The first described short circuit minor matters are provided with the first grounding through hole, and the second short circuit minor matters are provided with the second grounding through hole.
The utility model beneficial effect is:
1, two of duplexer channel bandwidths can independently regulate.The bandwidth of the first filter is by the coupling control between U-shaped slotted line resonator, the first open circuit minor matters and the second open circuit minor matters, by adjusting its spacing
g 1can control its bandwidth; The mode of resonance of the second filter can be controlled by loading minor matters length, thereby by adjusting
l 5size can regulate its bandwidth, the two can independent regulation.
2, there is high-isolation and high selectivity.Described duplexer has multiple transmission zeros between two passband edge and passband, makes duplexer have very high isolation and frequency selectivity.Source-load coupling between the first feeder line and the second feeder line can produce a transmission zero at the lower limb of ultra broadband frequency band; Source-load coupling between the first feeder line and the 3rd feeder line can produce transmission zero at upper stopband and deepen stopband; The first filter and the second filter loading effect each other can produce multiple transmission zeros, improve the isolation between two passages.
3, simple and compact for structure, circuit is simple, is easy to processing.
Brief description of the drawings
Fig. 1 is the schematic diagram of single-layer printed circuit plate.
Fig. 2 is duplexer schematic diagram.
Fig. 3 is duplexer upper strata circuit diagram.
Fig. 4 is duplexer lower circuit schematic diagram.
Fig. 5 is the simulate and test result of duplexer scattering parameter.
Fig. 6 is the isolation simulate and test result of duplexer.
Fig. 7 is the group delay simulate and test result of duplexer ultra broadband channel.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
It is 2.2 that the utility model adopts relative dielectric constant, and the pcb board that thickness is 0.508mm, as substrate, also can adopt the pcb board of other specifications as substrate.As shown in Figure 1, be coated with respectively metal patch 13 and lower metal patch 14 on the upper and lower surface of the dielectric substrate 12 of pcb board.Hereinafter described upper strata microstrip line construction is formed at the upper strata of dielectric substrate, and slotted line structure will form after lower metal patch 14 etchings.
Fig. 2 is the structural representation of slotted line duplexer, and in figure, U-shaped slotted line resonator 6 and multimode slotted line resonator 11 are positioned at medium substrate lower floor, and all the other microstrip line constructions are all positioned at medium substrate upper strata.Described duplexer comprises the first filter and the second filter, is applied to respectively ultra broadband channel and arrowband channel, and arrowband channel is taking WLAN (wireless local area network) WLAN as example explanation.Described the first filter comprises: the first feeder line 1, the second feeder line 2, the first open circuit minor matters 4, the second open circuit minor matters 5 and U-shaped slotted line resonator 6; Described the second filter comprises: the first feeder line 1, the 3rd feeder line 3, the first short circuit minor matters 7, the second short circuit minor matters 9 and multimode slotted line resonator 11.Wherein the first feeder line 1 is T-shaped structure, it is the common feeder of the first filter and the second filter, the first open circuit minor matters 4 are connected to first one end of feeder line 1T shape head and one end of the second feeder line 2 vertical with it with the second open circuit minor matters 5, the two is parallel to each other and is parallel with two arms of U-shaped slotted line resonator 6 respectively, U-shaped slotted line resonator 6 length are that the 1/2nd, first open circuit minor matters 4 and second open circuit minor matters 5 length of ultra broadband channel center frequency corresponding wavelength are about 1/4th of ultra broadband channel center frequency corresponding wavelength.The first short circuit minor matters 7 are connected to first other end of feeder line 1T shape head and one end of the 3rd feeder line 3 vertical with it with the second short circuit minor matters 9; Multimode slotted line resonator 11 adopts U-shaped structure, and position loads slotted line minor matters therebetween, U-shaped slotted line resonator length is 1/2nd of arrowband channel center frequency corresponding wavelength, and slotted line minor matters length is l5, by regulating l5 can control the bandwidth of arrowband channel; The first short circuit minor matters 7 and the second short circuit minor matters 9 provide close coupling as high resistant feeder line.
Fig. 3 and Fig. 4 are respectively described duplexer upper strata microstrip line schematic diagram and lower floor's slotted line structural representation.In order to show more clearly the circuit structure of duplexer, in Fig. 3 and Fig. 4, illustrate respectively its upper and lower circuit structure.Upper strata circuit all adopts microstrip line construction, the U-shaped slotted line resonator 6 of lower floor and multimode slotted line resonator 11 will form after lower metal paster 14 etchings, the first grounding through hole 8 is in medium substrate 12, to add metal column that microstrip line corresponding upper strata is connected with lower metal paster 14 with the second grounding through hole 10, forms short circuit
Duplexer described in the utility model has three ports, and wherein the other end of the first feeder line is as input port P1, and the other end of the second feeder line and the 3rd feeder line is respectively as two output port P2, P3.The input port of described duplexer and output port are all with the welding of SMA head, so that access test or practical devices.
Adopt HFSS software to carry out emulation, adopt Agilent N5230C vector network analyzer to test.
Fig. 5 is emulation and the Entity measurement result of described duplexer scattering parameter.This result is based on HFSS simulation software and Agilent N5230C vector network analyzer gained.As can be seen from the figure, duplexer works in ultra broadband channel and arrowband channel, Entity measurement result and simulation result coincide good, wherein ultra broadband channel center frequency is 3.1GHz, its 3dB relative bandwidth is 57.1%, narrowband systems centre frequency, at 5.35GHz, is positioned at WLAN (wireless local area network) WLAN channel, and its 3dB relative bandwidth is 4.86%.Upper edge at lower limb, top edge and second passband of the first passband respectively has a transmission zero, has improved the frequency selectivity of passband.Return loss in frequency band is all below 10dB.
Fig. 6 is the isolation simulate and test result between two passbands of described duplexer.Isolation is the value of the transmission coefficient S32 between output port 1P2 and output port 2P3.As can be seen from the figure simulation result and Entity measurement result are coincide well, and its isolation is all greater than 30dB at ultra broadband channel, and is all greater than 45dB at arrowband channel.
Fig. 7 is the group delay characteristic of duplexer ultra broadband channel filter.Group delay is to weigh the important parameter of broadband or ultra-wide band network, and its flatness has been reacted the characteristic quality of microwave network.As can be seen from the figure, described duplexer is in the group delay of ultra broadband channel at 0.3-0.65ns, and group delay is very little and have a very smooth characteristic.
The result of Fig. 5 to Fig. 7 shows that described duplexer has good effect in ultra broadband channel and arrowband channel.
The concrete application approach of the utility model is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvement, these improve and also should be considered as protection range of the present utility model.
Claims (5)
1. one kind is applied to the height isolation line of rabbet joint duplexer of ultra broadband channel and arrowband channel, it is characterized in that: comprise the first filter and the second filter, the first filter and the second filter share a medium substrate, all adopt slotted line structure and microstrip line construction, slotted line structure is positioned at the lower floor of medium substrate, and microstrip line construction is positioned at the upper strata of medium substrate;
The slotted line structure of the first filter is U-shaped slotted line resonator (6); Microstrip line construction comprises: the first feeder line (1), the second feeder line (2), the first open circuit minor matters (4), the second open circuit minor matters (5), wherein the first feeder line (1) adopts T-shaped structure, it is the common feeder of the first filter and the second filter, the first open circuit minor matters (4) are connected to one end of the first feeder line (1) T connector perpendicular, the second open circuit minor matters (5) are connected to one end of the second feeder line (2) perpendicular, two open circuit minor matters are parallel with two arms of U-shaped slotted line resonator (6) respectively, spacing in two open circuit minor matters horizontal directions is adjustable, is designated as
g 1;
The slotted line structure of the second filter is multimode slotted line resonator (11), microstrip line construction comprises: the first feeder line (1), the 3rd feeder line (3), the first short circuit minor matters (7), the second short circuit minor matters (9), wherein the first short circuit minor matters (7) are connected to the other end of the first feeder line (1) T connector, and vertical with it, the second short circuit minor matters (9) are connected to one end of the 3rd feeder line (3) vertical with it; Multimode slotted line resonator (11) adopts U-shaped structure, and its bosom position is loaded with slotted line minor matters, and the adjustable in length of slotted line minor matters, is designated as
l 5.
2. the height isolation line of rabbet joint duplexer that is applied to ultra broadband channel and arrowband channel according to claim 1, it is characterized in that: described the first filter is three rank filters, U-shaped slotted line resonator (6) length is that the 1/2nd, first open circuit minor matters (4) and the second open circuit minor matters (5) of ultra broadband channel center frequency corresponding wavelength are quarter-wave resonance device.
3. the height isolation line of rabbet joint duplexer that is applied to ultra broadband channel and arrowband channel according to claim 1, is characterized in that: in the second described filter, U-shaped slotted line resonator (11) length is 1/2nd of arrowband channel center frequency corresponding wavelength.
4. the height isolation line of rabbet joint duplexer that is applied to ultra broadband channel and arrowband channel according to claim 1, it is characterized in that: described medium substrate is pcb board, comprise upper metal patch (13) and the lower metal patch (14) of dielectric substrate (12) and coated dielectric substrate (12), microstrip line construction is formed at metal patch (13), and slotted line structure is that lower metal patch (14) etching forms.
5. the height isolation line of rabbet joint duplexer that is applied to ultra broadband channel and arrowband channel according to claim 1, it is characterized in that: the first described short circuit minor matters (7) are provided with the first grounding through hole (8), and the second short circuit minor matters (9) are provided with the second grounding through hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073671.6U CN203760598U (en) | 2014-02-20 | 2014-02-20 | High-isolation slot wire duplexer applied to ultra-wideband channel and narrowband channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073671.6U CN203760598U (en) | 2014-02-20 | 2014-02-20 | High-isolation slot wire duplexer applied to ultra-wideband channel and narrowband channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760598U true CN203760598U (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420073671.6U Withdrawn - After Issue CN203760598U (en) | 2014-02-20 | 2014-02-20 | High-isolation slot wire duplexer applied to ultra-wideband channel and narrowband channel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811833A (en) * | 2014-02-20 | 2014-05-21 | 南京航空航天大学 | High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel |
| CN108232380A (en) * | 2018-03-26 | 2018-06-29 | 华南理工大学 | A kind of highly integrated bimodulus rectangle resonator individual layer plane duplexer |
-
2014
- 2014-02-20 CN CN201420073671.6U patent/CN203760598U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811833A (en) * | 2014-02-20 | 2014-05-21 | 南京航空航天大学 | High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel |
| CN103811833B (en) * | 2014-02-20 | 2016-04-13 | 南京航空航天大学 | Be applied to the height isolation line of rabbet joint duplexer of ultra wide band channel and narrowband channels |
| CN108232380A (en) * | 2018-03-26 | 2018-06-29 | 华南理工大学 | A kind of highly integrated bimodulus rectangle resonator individual layer plane duplexer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140806 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |