CN103943920B - Based on four passband duplexers of minor matters loading stepped-impedance resonator - Google Patents
Based on four passband duplexers of minor matters loading stepped-impedance resonator Download PDFInfo
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- CN103943920B CN103943920B CN201410181934.XA CN201410181934A CN103943920B CN 103943920 B CN103943920 B CN 103943920B CN 201410181934 A CN201410181934 A CN 201410181934A CN 103943920 B CN103943920 B CN 103943920B
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Abstract
The invention discloses a kind of four passband duplexers based on minor matters loading stepped-impedance resonator, mainly solve the independent regulation of passband in conventional diplexer passage, the problem of the large and poor selectivity of volume.It comprises micro-band medium substrate (1), metal ground plate (2), two minor matters loading stepped-impedance resonators (3,4), common feeder (5), two output feeders (6,7).Each minor matters loading stepped-impedance resonator forms by the open circuit minor matters loading stepped-impedance resonator of two interdigitated structures of puppet, each open circuit minor matters loading stepped-impedance resonator is by step electric impedance resonator and open circuit minor matters composition, and each step electric impedance resonator is in " U " shape, each open circuit minor matters are positioned at the centre of the step electric impedance resonator at place, form pseudo-interdigitated two " mountain " character form structure.The present invention can realize the passband of two independent regulation at each passage, and compact conformation, and volume is little, and passband selectivity is high, can be used for many passbands transceive communications system.
Description
Technical field
The invention belongs to technical field of electronic devices, particularly micro-band four passband duplexer, can be used for wireless communication system radio-frequency front-end.
Background technology
Along with the fast development of mobile communication, satellite communication and radar, remote sensing technology, wireless frequency spectrum is day by day crowded, meet the demand of multichannel real time bidirectional communication simultaneously, often need, at the multichannel radio frequency channel synthesis of radio-frequency apparatus Front-end Design and discrete device, therefore to propose more and more higher requirement to the frequency microwave transceiver in communication system.Micro-strip duplexer is as twin-channel frequency-selecting device, receive-transmit system can be made to share an antenna simultaneously, thus reducing the complexity of system and the crosstalk of receiving and transmitting signal, micro-strip duplexer has that size is little, lightweight, cost is low, the advantage of easy processing, in microwave circuit, be able to extensive use.
2013, the people such as Hung-WeiWu are at IEEETransactionsonMicrowaveandWirelessComponentsLetters periodical (vol.23, no.5, pp.240-242,2013) delivered on " DesignofNewQuad-ChannelDiplexerWithCompactCircuitSize ", utilized a kind of four passband duplexers of the Technology design of double-passband filter and duplexer first.This four passbands duplexer forms the step electric impedance resonator intercoupled and the feeder line with source and load coupling by two, obtain dual-passband response by the impedance ratio and length ratio regulating step electric impedance resonator, recycling uniform impedance transmission line is made public coupling feed and is realized duplexer design.Although this structure can realize two passbands in each passage, only rely on step electric impedance resonator to be difficult to the independent regulation realizing two passbands, and volume ratio is larger.
Summary of the invention
The object of the invention is the deficiency for above-mentioned prior art, proposes a kind of four passband duplexers based on minor matters loading stepped-impedance resonator, to realize the independent regulation of two passbands, and reduces volume.
For achieving the above object, the present invention is based on four passband duplexers of the loading stepped resonator of minor matters, comprise medium substrate, metal ground plate, two minor matters loading stepped-impedance resonators, common feeder and two output feeders; Common feeder and two output feeders are all placed on the top of micro-band medium substrate, and each minor matters loading stepped-impedance resonator forms a transmission channel, it is characterized in that:
First minor matters loading stepped-impedance resonator is made up of the open circuit minor matters loading stepped-impedance resonator of two interdigitated structures of puppet, each open circuit minor matters loading stepped-impedance resonator is made up of the first step electric impedance resonator and the first open circuit minor matters, and the first step electric impedance resonator is in " U " shape, first open circuit minor matters are positioned at the centre of the first step electric impedance resonator, are formed in interdigitated two " mountain " character form structure of puppet of vertical direction;
Second minor matters loading stepped-impedance resonator is made up of the open circuit minor matters loading stepped-impedance resonator of two interdigitated structures of puppet; Each open circuit minor matters loading stepped-impedance resonator is made up of the second step electric impedance resonator and the second open circuit minor matters, and the second step electric impedance resonator is in " U " shape, second open circuit minor matters are positioned at the centre of the second step electric impedance resonator, are formed in interdigitated two " mountain " character form structure of puppet of horizontal direction.
As preferably, the length of the first described step electric impedance resonator meets:
wherein, L
11and L
12the length of two different characteristic transmission lines in the first step electric impedance resonator, λ
g1for the operation wavelength of this resonator works when resonance frequency, c is the light velocity in vacuum, ε
efor the effective dielectric constant of this resonator, f
10it is the resonance frequency of the first minor matters loading stepped-impedance resonator (3).
As preferably, the length of the second described step electric impedance resonator meets:
wherein, L
21and L
22the length of two different characteristic transmission lines in the second step electric impedance resonator, λ
g2for the operation wavelength of this resonator works when resonance frequency, c is the light velocity in vacuum, ε
efor the effective dielectric constant of this resonator, f
20it is the resonance frequency of the second minor matters loading stepped-impedance resonator.
As preferably, the length L of described first open circuit minor matters
13meet: L
13< λ
g1/ 4, λ
g1be the operation wavelength of the first minor matters loading stepped-impedance resonator when being operated in resonance frequency.
As preferably, the length L of described second open circuit minor matters
23meet: L
23< λ
g2/ 4, λ
g2be the operation wavelength of the second minor matters loading stepped-impedance resonator when being operated in resonance frequency.
As preferably, described common feeder, it comprises 50 ohm of connecting lines of two input main feeders and input main feeder end; This first input main feeder is parallel with the second step electric impedance resonator both sides in the second minor matters loading stepped-impedance resonator; This second input main feeder is parallel with the first step electric impedance resonator both sides in the first minor matters loading stepped-impedance resonator.
As preferably, two output feeders, comprise the first output main feeder, second and export main feeder, export 50 ohm of connecting lines that main feeder end is connected with first, and export with second 50 ohm of connecting lines that main feeder end is connected; This first output main feeder is parallel with the both sides of the first step electric impedance resonator in the first minor matters loading stepped-impedance resonator; This second output main feeder is parallel with one side of the second step electric impedance resonator in the second minor matters loading stepped-impedance resonator.
The present invention has following technological merit:
1. the puppet interdigitated structure minor matters loading stepped-impedance resonator of the present invention owing to have employed two cascades, the passband of two independent regulation can be produced in a passage, simultaneously because the minor matters loading stepped-impedance resonator of each passage adopts two " mountain " character form structure, reduce the overall dimensions of duplexer.
2. the present invention is owing to have employed the step electric impedance resonator of minor matters loading, makes to produce a transmission zero between passband, improves the degree of suppression outside band.
3. the present invention is owing to have employed stepped impedance transmission line as common feeder, by the coupled outside regulating the length of transmission line ratio and impedance ratio to regulate two passages, can add the degree of freedom of adjustment.
4. the present invention is owing to adopting step electric impedance resonator, efficiently solves the problem of fundamental frequency integral multiple spurious response, makes parasitic frequency beyond 3 frequencys multiplication.
Accompanying drawing explanation
Fig. 1 is tomograph of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the transmission response curve chart of the embodiment of the present invention 1;
Fig. 4 is reflex response and the isolation response curve of the embodiment of the present invention 1;
Fig. 5 is the transmission response curve chart of the embodiment of the present invention 2;
Fig. 6 is reflex response and the isolation response curve of the embodiment of the present invention 2;
Fig. 7 is the transmission response curve chart of the embodiment of the present invention 3;
Fig. 8 is reflex response and the isolation response curve of the embodiment of the present invention 3.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated:
Embodiment 1: design size is the four passband duplexers of 38.15mm × 33.39mm.
See figures.1.and.2, the present invention forms primarily of micro-band medium substrate 1, metal ground plate 2, first minor matters loading stepped-impedance resonator 3, second minor matters loading stepped-impedance resonator 4, common feeder 5, first output feeder 6, second output feeder 7.Common feeder 5, first output feeder 6 and the second output feeder 7 are all placed on the top of micro-band medium substrate 1.Wherein:
Described micro-band medium substrate 1, select dielectric constant to be 2.45, thickness is the copper-clad plate of 1mm, and its copper face is as metal ground plate 2;
Described first minor matters loading stepped-impedance resonator 3, the open circuit minor matters loading stepped-impedance resonator 31 being cascaded into pseudo-interdigitated structure by two forms, and each open circuit minor matters loading stepped-impedance resonator 31 forms by the first step electric impedance resonator 311 and the first open circuit minor matters 312.Wherein, the width w of the first transmission line of the first step electric impedance resonator 311
11with the width w of the second transmission line
12meet: w
11=3mm, w
12=1mm, the length L of the first transmission line of this first step electric impedance resonator 311
11with the length L of the second transmission line
12meet:
and L
11=9.64mm, L
12=8.65mm, in formula, f
10be the resonance frequency of the first minor matters loading stepped-impedance resonator 3, and f
10=3.5GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.094.This first step electric impedance resonator 311 is " U " shape shape, and is positioned at the upper strata of micro-band medium substrate 1; These the first open circuit minor matters 312 are positioned at the centre of this first step electric impedance resonator 311.The width w of the first open circuit minor matters 312
13meet: w
13=4mm, its length L
13meet: L
13< λ
g1/ 4=10.4mm, these open circuit minor matters are used for the centre frequency f of first passband of generation first minor matters loading stepped-impedance resonator 3
11, i.e. f
11=2.4GHz, in formula, λ
g1be the operation wavelength of the first minor matters loading stepped-impedance resonator 3 when being operated in resonance frequency.Interdigitated two " mountain " character form structure of puppet that two open circuit minor matters loading stepped-impedance resonators 31 are formed in vertical direction jointly, to produce the passband of two independent regulation in first passage, and reduces volume.G is spaced apart between two parallel first open circuit minor matters 312
13=0.45mm, first open circuit minor matters 312 and the first adjacent step electric impedance resonator 311 between be spaced apart g
14=1.6mm;
Described second minor matters loading stepped-impedance resonator 4, the open circuit minor matters loading stepped-impedance resonator 41 being cascaded into pseudo-interdigitated structure by two forms, and each open circuit minor matters loading stepped-impedance resonator 41 forms by the second step electric impedance resonator 411 and the second open circuit minor matters 412.Wherein, the width w of the first transmission line of the second step electric impedance resonator 411
21with the width w of the second transmission line
22meet: w
21=1.7mm, w
22=1mm, the length L of the first transmission line of this second step electric impedance resonator 411
21with the length L of the second transmission line
22meet length to meet:
and L
21=5.01mm, L
22=2.86mm, in formula, f
20be the resonance frequency of the second minor matters loading stepped-impedance resonator 4, and f
20=5.8GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.120.This second step electric impedance resonator 411 is " U " shape shape, and is positioned at the upper strata of micro-band medium substrate 1; These the second open circuit minor matters 412 are positioned at the centre of this second step electric impedance resonator 411.The width w of the second open circuit minor matters 412
23meet: w
23=1.4mm, its length L
23meet: L
23< λ
g2/ 4=9.85mm, these open circuit minor matters are used for the centre frequency f of first passband of generation second minor matters loading stepped-impedance resonator 4
21, i.e. f
21=5.2GHz.In formula, λ
g2be the operation wavelength of the second minor matters loading stepped-impedance resonator 4 when being operated in resonance frequency.Interdigitated two " mountain " character form structure of puppet that two open circuit step electric impedance resonators 41 are formed in horizontal direction jointly, to produce the passband of two independent regulation in second passage, and reduces volume.G is spaced apart between two parallel second open circuit minor matters 412
23=0.37mm, second open circuit minor matters 412 and the second adjacent step electric impedance resonator 411 between be spaced apart g
24=0.37mm;
Described common feeder 5, it comprises the first input main feeder 51, second and inputs main feeder 52 and input with second 50 ohm of connecting lines 53 that main feeder 52 end is connected; This first input main feeder 51 is parallel with the second step electric impedance resonator 411 both sides; This second input main feeder 52 is parallel with the first step electric impedance resonator 311 both sides.The live width of this first main feeder 51 is 0.2mm, and the live width of the second main feeder 52 is 1mm, the interval g between a limit of the first main feeder 51 and the second adjacent step electric impedance resonator 411
20=0.2mm, the interval g between a limit of the second main feeder 52 and the first adjacent step electric impedance resonator 311
10=0.2mm;
Described first output feeder 6, comprises the first output main feeder 61 and exports with first 50 ohm of connecting lines 62 that main feeder 61 end is connected, and first to export main feeder 61 parallel with the both sides of the first step electric impedance resonator 311 for this.This first live width exporting main feeder 61 is 1mm, the interval g between itself and a limit of the first step electric impedance resonator 311
11=0.2mm;
Described second output feeder 7, comprises the second output main feeder 71 and exports with second 50 ohm of connecting lines 72 that main feeder 71 end is connected, and this second exports the parallel of main feeder 71 and the second step electric impedance resonator 411.This second live width exporting main feeder 71 is 0.5mm, the interval g between itself and a limit of the second step electric impedance resonator 411
21=0.2mm.
Common feeder 5 connects antenna, two passages that this four passbands duplexer is produced share an antenna, signal is inputted by this antenna, when this four passbands duplexer is operated in first passage, by the first output feeder 6, signal is exported, when this four passbands duplexer is operated in second channel, by the second output feeder 7, signal is exported.
Embodiment 2: design size is the four passband duplexers of 32.48mm × 32.02mm.
The structure of the present embodiment is identical with embodiment 1, below provides the structural parameters being different from embodiment 1:
The width w of the first transmission line of described first step electric impedance resonator 311
11with the width w of the second transmission line
12meet: w
11=2mm, w
12=1mm, the length L of the first transmission line of this first step electric impedance resonator 311
11with the length L of the second transmission line
12meet:
and L
11=9.35mm, L
12=5mm, in formula, f
10be the resonance frequency of the first minor matters loading stepped-impedance resonator 3, and f
10=4.1GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.10.The width w of the first open circuit minor matters 312
13=2mm, length L
13=11.5mm, it is f that these open circuit minor matters are used for first passband of generation first minor matters loading stepped-impedance resonator 3 and centre frequency
11the passband of=3.2GHz.G is spaced apart between two in this first minor matters loading stepped-impedance resonator 3 parallel first open circuit minor matters 312
13=1.08mm, first open circuit minor matters 312 and the first adjacent step electric impedance resonator 311 between be spaced apart g
14=0.3mm;
The width w of the first transmission line of described second step electric impedance resonator 411
21with the width w of the second transmission line
22meet: w
21=1.7mm, w
22=1mm.The length L of the first transmission line of this second step electric impedance resonator 411
21with the length L of the second transmission line
22meet length to meet: 2 (L
21+ L
22)=17.34mm, and L
21=6.01mm, L
22=2.66mm, in formula, f
20be the resonance frequency of the second minor matters loading stepped-impedance resonator 4, and f
20=6.9GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.133.The width w of the second open circuit minor matters 412
23=1.4mm, length L
23=6.65mm, it is f that these open circuit minor matters are used for first passband of generation second minor matters loading stepped-impedance resonator 4 and centre frequency
21the passband of=5.05GHz.G is spaced apart between two in this second minor matters loading stepped-impedance resonator 4 parallel open circuit minor matters 412
23=0.4mm, second open circuit minor matters 412 and the second adjacent step electric impedance resonator 411 between be spaced apart g
24=5.15mm;
The live width of described first main feeder 51 is 0.2mm, and the live width of the second main feeder 52 is 1.1mm, the interval g between a limit of the first main feeder 51 and the second adjacent step electric impedance resonator 411
20=0.2mm, the interval g between a limit of the second main feeder 52 and the first adjacent step electric impedance resonator 311
10=0.2mm;
Described first live width exporting main feeder 61 is 1.2mm, the interval g between itself and a limit of the first step electric impedance resonator 311
11=0.2mm;
Described second live width exporting main feeder 71 is 0.5mm, the interval g between itself and a limit of the second step electric impedance resonator 411
21=0.2mm.
Embodiment 3: design size is the four passband duplexers of 38.15mm × 33.02mm.
The structure of the present embodiment is identical with embodiment 1, below provides the structural parameters being different from embodiment 1:
The width w of the first transmission line of described first step electric impedance resonator 311
11with the width w of the second transmission line
12meet: w
11=3mm, w
12=1mm.The length L of the first transmission line of this first step electric impedance resonator 311
11with the length L of the second transmission line
12meet:
and L
11=10.64mm, L
12=7.15mm, in formula, f
10be the resonance frequency of the first minor matters loading stepped-impedance resonator 3, and f
10=3.3GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.092.The width w of these the first open circuit minor matters 312
13=4mm, length L
13=11.4mm, it is f that these open circuit minor matters are used for first passband of generation first minor matters loading stepped-impedance resonator 3 and centre frequency
11the passband of=2.27GHz.
The width w of the first transmission line of described second step electric impedance resonator 411
21with the width w of the second transmission line
22meet: w
21=1.7mm, w
22=1mm.The length L of the first transmission line of this second step electric impedance resonator 411
21with the length L of the second transmission line
22meet length to meet: 2 (L
21+ L
22)=18.32mm, and L
21=7.01mm, L
22=2.16mm, in formula, f
20be the resonance frequency of the second minor matters loading stepped-impedance resonator 4, and f
20=6.1GHz, c are the light velocity in vacuum, and c=3 × 10
8m/s, ε
efor the effective dielectric constant of this micro-strip resonantor, and ε
e=2.124.
The width w of the second open circuit minor matters 412
23=1.4mm, length L
23=7.65mm, it is f that these open circuit minor matters are used for first passband of generation second minor matters loading stepped-impedance resonator 4 and centre frequency
21the passband of=4.65GHz.
G is spaced apart between two in first minor matters loading stepped-impedance resonator 3 parallel first open circuit minor matters 312
13=0.45mm, first open circuit minor matters 312 and the first adjacent step electric impedance resonator 311 between be spaced apart g
14=0.6mm.
G is spaced apart between two in second minor matters loading stepped-impedance resonator 4 parallel second open circuit minor matters 412
23=0.4mm, second open circuit minor matters 412 and the second adjacent step electric impedance resonator 411 between be spaced apart g
24=6.05mm.
The live width of the first main feeder 51 is 0.2mm, and the live width of the second main feeder 52 is 1.1mm, the interval g between a limit of the first main feeder 51 and the second adjacent step electric impedance resonator 411
20=0.2mm, the interval g between a limit of the second main feeder 52 and the first adjacent step electric impedance resonator 311
10=0.2mm.
First live width exporting main feeder 61 is 0.9mm, the interval g between itself and a limit of the first step electric impedance resonator 311
11=0.2mm, the second live width exporting main feeder 71 is 0.5mm, the interval g between itself and a limit of the second step electric impedance resonator 411
21=0.2mm.
Effect of the present invention can be further illustrated by following simulation result:
Emulation 1: emulate the transmission characteristic of four passband duplexers in embodiment 1, result as shown in Figure 3; Emulate the reflection characteristic of this four passbands duplexer and isolation characteristic, result as shown in Figure 4.S21 in Fig. 3 is the transfer curve of the first minor matters loading stepped-impedance resonator 3 in this four passbands duplexer, and S31 is the transfer curve of the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer; S11 in Fig. 4 is the coverage diagram of this four passbands duplexer, and S32 is the isolation characteristic curve of the first minor matters loading stepped-impedance resonator 3 and the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer.
As seen from Figure 3, the centre frequency of four passband duplexers in embodiment 1 is respectively 2.4GHz, 3.5GHz, 5.2GHz and 5.8GHz, and relative bandwidth is respectively 2.5%, and 1.5%, 1.5%, 1.8%; Have a transmission zero between high frequency pass band in each passage of the transfer curve of this four passbands duplexer and low frequency pass band, therefore, this four passbands duplexer has good Out-of-band rejection characteristic;
As seen from Figure 4, the isolation characteristic curve of this four passbands duplexer is all below-30dB, and therefore, this four passbands duplexer has good isolation characteristic.
Emulation 2: emulate the transmission characteristic of four passband duplexers in embodiment 2, result as shown in Figure 5; Emulate the reflection characteristic of this four passbands duplexer and isolation characteristic, result as shown in Figure 6.S21 in Fig. 5 is the transfer curve of the first minor matters loading stepped-impedance resonator 3 in this four passbands duplexer, and S31 is the transfer curve of the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer; S11 in Fig. 6 is the coverage diagram of this four passbands duplexer, and S32 is the isolation characteristic curve of the first minor matters loading stepped-impedance resonator 3 and the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer.
As seen from Figure 5, the centre frequency of four passband duplexers in embodiment 2 is respectively 3.2GHz, 4.1GHz, 5.05GHz and 6.9GHz, and relative bandwidth is respectively 4.4%, and 2.4%, 2.3%, 1.9%; Have a transmission zero between high frequency pass band in each passage of the transfer curve of this four passbands duplexer and low frequency pass band, therefore, this four passbands duplexer has good Out-of-band rejection characteristic;
As seen from Figure 6, the isolation characteristic curve of this four passbands duplexer is all below-30dB, and therefore, this four passbands duplexer has good isolation characteristic.
Emulation 3: emulate the transmission characteristic of four passband duplexers in embodiment 3, result as shown in Figure 7.Emulate the reflection characteristic of this four passbands duplexer and isolation characteristic, result as shown in Figure 8.S21 in Fig. 7 is the transfer curve of the first minor matters loading stepped-impedance resonator 3 in this four passbands duplexer, and S31 is the transfer curve of the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer; S11 in Fig. 8 is the coverage diagram of this four passbands duplexer, and S32 is the isolation characteristic curve of the first minor matters loading stepped-impedance resonator 3 and the second minor matters loading stepped-impedance resonator 4 in this four passbands duplexer.
As seen from Figure 7, the centre frequency of four passband duplexers in embodiment 3 is respectively 2.27GHz, 3.3GHz, 4.65GHz and 6.1GHz, and relative bandwidth is respectively 3.5%, and 1.8%, 2.6%, 1.8%; Have a transmission zero between high frequency pass band in each passage of the transfer curve of this four passbands duplexer and low frequency pass band, therefore, this four passbands duplexer has good Out-of-band rejection characteristic;
As seen from Figure 8, the isolation characteristic curve of this four passbands duplexer is all below-30dB, and therefore, this four passbands duplexer has good isolation characteristic.
Above-mentioned all embodiments are the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. four passband duplexers based on minor matters loading stepped-impedance resonator, comprise micro-band medium substrate (1), metal ground plate (2), two minor matters loading stepped-impedance resonators (3,4), common feeder (5) and two output feeders (6,7); This common feeder (5) and two output feeders (6,7) are all placed on the top of micro-band medium substrate (1), and each minor matters loading stepped-impedance resonator forms a transmission channel, it is characterized in that:
First minor matters loading stepped-impedance resonator (3) is made up of the open circuit minor matters loading stepped-impedance resonator (31) of two interdigitated structures of puppet of the first minor matters, each open circuit minor matters loading stepped-impedance resonator (31) is made up of the first step electric impedance resonator (311) and the first open circuit minor matters (312), and the first step electric impedance resonator (311) is in " U " shape, first open circuit minor matters (312) is positioned at the centre of the first step electric impedance resonator (311), is formed in interdigitated two " mountain " character form structure of puppet of vertical direction;
Second minor matters loading stepped-impedance resonator (4) is made up of the open circuit minor matters loading stepped-impedance resonator (41) of two interdigitated structures of puppet of the second minor matters; Each open circuit minor matters loading stepped-impedance resonator (41) is made up of the second step electric impedance resonator (411) and the second open circuit minor matters (412), and the second step electric impedance resonator (411) is in " U " shape, second open circuit minor matters (412) is positioned at the centre of the second step electric impedance resonator (411), is formed in interdigitated two " mountain " character form structure of puppet of horizontal direction;
Common feeder (5), it comprises two inputs main feeder (51,52) and inputs with second 50 ohm of connecting lines (53) that main feeder (52) end is connected; First input main feeder (51) is parallel with the second step electric impedance resonator (411) both sides in the second minor matters loading stepped-impedance resonator (4); Second input main feeder (52) is parallel with the first step electric impedance resonator (311) both sides in the first minor matters loading stepped-impedance resonator (3);
Article two, output feeder (6,7), comprise the first output main feeder (61), second to export main feeder (71), to export 50 ohm of connecting lines (62) that main feeder end is connected with first, and export with second 50 ohm of connecting lines (72) that main feeder end is connected; First output main feeder (61) is parallel with the both sides of the first step electric impedance resonator (311) in the first minor matters loading stepped-impedance resonator (3); Second output main feeder (71) is parallel with one side of the second step electric impedance resonator (411) in the second minor matters loading stepped-impedance resonator (4).
2. four passband duplexers according to claim 1, is characterized in that, the length of the first step electric impedance resonator (311) meets:
wherein, L
11and L
12the length of two different characteristic transmission lines in the first step electric impedance resonator (311), λ
g1be the operation wavelength of the first minor matters loading stepped-impedance resonator (3) when being operated in resonance frequency, c is the light velocity in vacuum, ε
efor the effective dielectric constant of this resonator, f
10it is the resonance frequency of the first minor matters loading stepped-impedance resonator (3).
3. four passband duplexers according to claim 1, is characterized in that, the length of the second step electric impedance resonator (411) meets:
wherein, L
21and L
22the length of two different characteristic transmission lines in the second step electric impedance resonator (411), λ
g2be the operation wavelength of the second minor matters loading stepped-impedance resonator (4) resonator works when resonance frequency, c is the light velocity in vacuum, ε
efor the effective dielectric constant of this resonator, f
20it is the resonance frequency of the second minor matters loading stepped-impedance resonator (4).
4. four passband duplexers according to claim 1, is characterized in that, the length L of the first open circuit minor matters (312) in the first minor matters loading stepped-impedance resonator (3)
13meet: L
13< λ
g1/ 4, λ
g1be the operation wavelength of the first minor matters loading stepped-impedance resonator (3) when being operated in resonance frequency.
5. four passband duplexers according to claim 1, is characterized in that, the length L of the second open circuit minor matters (412) in the second minor matters loading stepped-impedance resonator (4)
23meet: L
23< λ
g2/ 4, λ
g2be the operation wavelength of the second minor matters loading stepped-impedance resonator (4) when being operated in resonance frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181934.XA CN103943920B (en) | 2014-04-30 | 2014-04-30 | Based on four passband duplexers of minor matters loading stepped-impedance resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181934.XA CN103943920B (en) | 2014-04-30 | 2014-04-30 | Based on four passband duplexers of minor matters loading stepped-impedance resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103943920A CN103943920A (en) | 2014-07-23 |
| CN103943920B true CN103943920B (en) | 2016-02-10 |
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| CN106549201B (en) * | 2016-10-09 | 2019-07-02 | 清华大学 | A kind of filter by having the H-type micro-strip resonantor for inserting finger tip mouth to form |
| CN107196027B (en) * | 2017-05-08 | 2019-07-23 | 电子科技大学 | A kind of eight double-channel duplex devices of miniaturization |
| CN107317589A (en) * | 2017-06-16 | 2017-11-03 | 京信通信系统（中国）有限公司 | Micro-strip combiner and its radio circuit |
| CN111082191B (en) * | 2019-12-25 | 2021-02-02 | 南通大学附属医院 | Duplexer with independently designed channels |
| CN113783632B (en) * | 2021-09-14 | 2024-04-05 | 福建星海通信科技有限公司 | Device and method for quantitatively measuring nonlinearity of passive device |
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| CN1414658A (en) * | 2002-12-20 | 2003-04-30 | 清华大学 | Folding micro strip line resonantor and its filter |
| JP2010232779A (en) * | 2009-03-26 | 2010-10-14 | Kyocera Corp | Diplexer, and wireless communication module and wireless communication device using the same |
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| CN102522614A (en) * | 2011-12-01 | 2012-06-27 | 华南理工大学 | Miniature high-selectivity frequency independently controllable tri-band bandpass filter |
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