CN202737076U - Equal power distributor integrated with band-pass filtering function - Google Patents
Equal power distributor integrated with band-pass filtering function Download PDFInfo
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- CN202737076U CN202737076U CN 201220414361 CN201220414361U CN202737076U CN 202737076 U CN202737076 U CN 202737076U CN 201220414361 CN201220414361 CN 201220414361 CN 201220414361 U CN201220414361 U CN 201220414361U CN 202737076 U CN202737076 U CN 202737076U
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- microstrip line
- pass filtering
- filtering function
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Abstract
The utility model discloses an equal power distributor integrated with a band-pass filtering function. The equal power distributor integrated with the band-pass filtering function includes an upper layer micro-strip structure, an isolating element, an interlayer medium substrate and a lower-layer grounding metal plate. The equal power distributor integrated with the band-pass filtering function includes two single-frequency band-pass filtering circuits and an isolating element connected between the two single-frequency band-pass filtering circuits. The input impedance and the output impedance of the equal power distributor integrated with the band-pass filtering function are equal. The input impedance and the output impedance of each of the single-frequency band-pass filtering circuits can be adjusted through changing the coupling strength and positions of ports among resonators, thereby realizing the power distributing and matching. Each of the single-frequency band-pass filtering circuits is composed by coupling three quarter-wave resonators together. The equal power distributor integrated with the band-pass filtering function provided by the utility model can be applied to radio frequency front-end systems in different types and has functions of power distribution and frequency selection. Compared with a filtering circuit and a power divider cascaded together, the equal power distributor integrated with the band-pass filtering function is smaller in size and is more in favor of the integration and the miniaturization of devices.
Description
Technical field
The utility model relates to a kind of power divider with filter function, particularly can be applicable to the five equilibrium power divider of the integrated band-pass filtering function of radio-frequency (RF) front-end circuit.
Background technology
Power divider is the part on a basis in the microwave circuit, because it has the function of separation and composite signal, so all will use in a lot of aerial arrays and balancing circuitry.And bandwidth-limited circuit is another kind of indispensable part in the wireless communication system, because it can isolate the frequency band that needs.These two kinds of elements exist in many microwave systems simultaneously.
In the past few decades, a large amount of researchs about power divider are arranged.The focus of research is to widen frequency band, reduces area, and double frequency response and harmonic wave suppress.Meanwhile, bandwidth-limited circuit also is important field of research in the passive circuit design.The single-pass band is two different research directions with the comb filtering circuit.The aspects such as the focus of research is to reduce volume, improve frequency selectivity, control flexibly the operating frequency of a plurality of passbands and bandwidth, increase transmission zero.
In a lot of Radio Frequency Subsystems, power divider and filter circuit need to link together to realize to separate the function with filtered signal usually.Yet their characteristic own is all just paid attention in the research of all power dividers above-mentioned and filter circuit, and the possibility of considering both combinations is seldom arranged.Usually use discrete devices in traditional system and realize this two functions.But size can be very large like this.Single device with dual-use function can have two kinds of functions simultaneously, can satisfy the requirement of miniaturization.The double-function device that has simultaneously separation/combined power signal and frequency to select has had some scholar's research mistakes.At K. J. Song, and Q. Xue, " Novel Ultra-Wideband (UWB) Multilayer Slotline Power Divider With Bandpass Response; " IEEE Microw. Wireless Compon. Lett., vol. 20, and no. 1, pp. 13-15, Jan, in 2010., the author has finished one and has had the logical corresponding ultra broadband power divider of band.The coupling of the little band slotted line of multilayer is for separating of/composite signal and intercept the unwanted frequency band.In addition, a kind of Wilkinson power divider that has band-pass response and harmonic wave inhibition concurrently designs at document P. Cheong, K. Lai, and K. Tam, " Compact Wilkinson Power Divider with Simultaneous Bandpass Response and Harmonic Suppression; " in 2010 IEEE MTT-S International Microwave Symposium Digest, Snaheim, USA, 2010. in be suggested, in this design, interdigital stepped impedance coupling line is used to practical function.In addition, at document X. Y. Tang, and K. Mouthaan, " Filter Integrated Wilkinson Power Dividers, " Microwave and Optical Technology Letters, vol. 52, no. 12, pp. 2830-2833, Dec mentions in 2010., Π-type transmission line can be integrated in the power divider, yet just with Π-type transmission line, its filter function has much room for improvement in the article.In order to fill up this blank, the utility model proposes a kind of five equilibrium power divider of novel integrated band-pass filtering function.
The utility model content
The purpose of this utility model is to overcome the prior art above shortcomings, has proposed the five equilibrium power divider of integrated band-pass filtering function.In in the utility model, the single-frequency bandwidth-limited circuit is used as impedance transducer to replace traditional quarter-wave transmission line.Resistance, electric capacity or inductance are connected in the open end of two single-frequency bandwidth-limited circuits to obtain good isolation effect as isolated component.Because the specific position that isolating device is put, the structure that proposes has less size, can improve the integrated level of circuit.Because integrated single-frequency bandwidth-limited circuit in the power divider, so can realize simultaneously the function that power division and frequency are selected.
For realizing the utility model purpose, the technical scheme that the utility model adopts is as follows:
The five equilibrium power divider of integrated band-pass filtering function comprises upper strata microstrip structure, isolated component, interlayer substrate and lower floor's grounding plate, and the upper strata microstrip structure is attached to interlayer plate upper surface, and interlayer plate lower surface is grounded metal; It is characterized in that: the upper strata microstrip structure comprises two single-frequency bandwidth-limited circuits, two single band pass filter circuit structures are identical, be arranged into laterally zygomorphic structure, two single-frequency bandwidth-limited circuits share an input port as the input port I/P of the five equilibrium power divider of integrated band-pass filtering function, and the output port of two single-frequency bandwidth-limited circuits is as the first output port O/P1 and the second output port O/P2 of the five equilibrium power divider of integrated band-pass filtering function.
The five equilibrium power divider of above-mentioned integrated band-pass filtering function, the single-frequency bandwidth-limited circuit that is positioned at the top is comprised of three quarter-wave resonance device couplings, is respectively the first resonator, the second resonator and the 3rd resonator; Wherein the first resonator is the top open circuit of the first microstrip line, the second microstrip line, the 3rd microstrip line and the 4th microstrip line formation of successively connection, the microstrip line of terminal ground connection; The second resonator is the top ground connection that the 5th microstrip line, the 6th microstrip line, the 7th microstrip line, the 8th microstrip line, the 9th microstrip line and the tenth microstrip line of successively connection consists of, the microstrip line of terminal open circuit; The 3rd resonator is the top ground connection that the 11 microstrip line, the 12 microstrip line, the 13 microstrip line and the 14 microstrip line of successively connection consists of, the microstrip line of terminal open circuit; Wherein the second microstrip line and the 13 microstrip line coupling, the 3rd microstrip line and the coupling of the 12 microstrip line, the 4th microstrip line and the coupling of the 5th microstrip line, an end of the 5th microstrip line and the coupling of an end of the 11 microstrip line; The open end of the first resonator is connected with input port I/P, and 13 microstrip lines of the 3rd resonator are connected with the first output port O/P; One end of isolated component is connected with the open end of the second resonator that is positioned at the top, and the other end is connected with the open end of the corresponding resonator of single-frequency bandwidth-limited circuit that is positioned at the below.
The five equilibrium power divider of above-mentioned integrated band-pass filtering function, the length of quarter-wave resonance device
LResonance frequency for described single-frequency bandwidth-limited circuit
fCorresponding wavelength
λ1/4th; Wherein,
LBe actual microstrip line length.
The five equilibrium power divider of above-mentioned integrated band-pass filtering function, single-frequency bandwidth-limited circuit passband left and right sides transmission zero is produced by the cross-couplings between resonator.
The five equilibrium power divider of above-mentioned integrated band-pass filtering function, the input impedance of the five equilibrium power divider of integrated band-pass filtering function is identical with output impedance, and the input and output impedance of each single-frequency bandwidth-limited circuit can regulate to realize coupling by the stiffness of coupling and the port position that change between the resonator.
The five equilibrium power divider of above-mentioned integrated band-pass filtering function, isolated component are resistance, electric capacity or inductance.
With respect to prior art, the utlity model has following advantage:
(1) integrated band-pass filtering function in traditional power divider, can realize simultaneously the function of power division and trap signal, and than filter circuit and the less integrated and miniaturization that is conducive to radio-frequency front-end system of power splitter size of cascade.
(2) the five equilibrium power divider of integrated band-pass filtering function has the system that forms than traditional discrete power divider and filter bank that lower insertion loss is arranged.
Description of drawings
Fig. 1 is the structure chart of the five equilibrium power divider of integrated band-pass filtering function.
Fig. 2 is the transfer curve figure of single-frequency bandwidth-limited circuit.
Fig. 3 is the structural representation of the five equilibrium power divider of integrated band-pass filtering function.
Fig. 4 a is the transfer curve figure of the five equilibrium power divider of integrated band-pass filtering function.
Fig. 4 b is output return loss and the isolating coefficient of the five equilibrium power divider of integrated band-pass filtering function.
Concrete real mode
Below in conjunction with accompanying drawing the utility model is described in further detail, but the claimed scope of the utility model is not limited to the scope of lower example statement.
As shown in Figure 1, the five equilibrium power divider of integrated band-pass filtering function comprises the upper strata microstrip structure, isolated component, interlayer substrate and lower floor's grounding plate, the upper strata microstrip structure is attached to interlayer plate upper surface, and interlayer plate lower surface is grounded metal; It is characterized in that: the upper strata microstrip structure comprises two single-frequency bandwidth-limited circuits, two single band pass filter circuit structures are identical, be arranged into laterally zygomorphic structure, two single-frequency bandwidth-limited circuits share an input port as the input port I/P of the five equilibrium power divider of integrated band-pass filtering function, and the output port of two single-frequency bandwidth-limited circuits is as the first output port O/P1 and the second output port O/P2 of the five equilibrium power divider of integrated band-pass filtering function.One end of isolated component 18 is connected with the open end of the second resonator 2 that is positioned at the top, and the other end is connected with the open end of the corresponding resonator of single-frequency bandwidth-limited circuit that is positioned at the below.Wherein, isolated component 18 can be resistance, electric capacity or inductance.
As shown in Figure 1, the single-frequency bandwidth-limited circuit in the square frame is comprised of three quarter-wave resonance device couplings, is respectively the first resonator 1, the second resonator 2 and the 3rd resonator 3; Wherein the first resonator 1 is the top open circuit of the first microstrip line 4, the second microstrip line 5, the 3rd microstrip line 6 and the 4th microstrip line 7 formations of successively connection, the microstrip line of terminal ground connection; The second resonator 2 is the top ground connection that the 5th microstrip line 8, the 6th microstrip line 9, the 7th microstrip line 10, the 8th microstrip line 11, the 9th microstrip line 12 and the tenth microstrip line 13 of successively connection consists of, the microstrip line of terminal open circuit; The 3rd resonator 3 is the top ground connection that the 11 microstrip line 14, the 12 microstrip line 15, the 13 microstrip line 16 and the 14 microstrip line 17 of successively connection consists of, the microstrip line of terminal open circuit; Wherein the second microstrip line 5 and 16 couplings of the 13 microstrip line, the 3rd microstrip line 6 and 15 couplings of the 12 microstrip line, the 4th microstrip line 7 and 8 couplings of the 5th microstrip line, an end of the 5th microstrip line 8 and the coupling of an end of the 11 microstrip line 14; The open end of the first resonator 1 is connected with input port I/P, and 13 microstrip lines 16 of the 3rd resonator 3 are connected with the first output port O/P1; The length of quarter-wave resonance device
LResonance frequency for described single-frequency bandwidth-limited circuit
fCorresponding wavelength
λ1/4th; Wherein,
LBe actual microstrip line length.
The input and output impedance of each single-frequency bandwidth-limited circuit can regulate to reach coupling by the stiffness of coupling and the port position that change between the resonator.The single-frequency bandwidth-limited circuit in the square frame as shown in Figure 1, its input impedance is 100 ohm, output impedance is 50 ohm.Fig. 2 is the amplitude simulated response of this single-frequency bandwidth-limited circuit.The five equilibrium power divider of integrated band-pass filtering function is by two single band pass filter the electric circuit constitutes that structure is identical, and these two single-frequency bandwidth-limited circuits are equivalent to parallel connection, so the circuit input impedance after the parallel connection and 50 ohm of couplings.Exactly because the input and output impedance of single-frequency bandwidth-limited circuit can regulate to realize coupling by the stiffness of coupling and the port position that change between the resonator, therefore can be used for replacing the quarter-wave transmission line used in the conventional power distributor, realize the function of impedance transformation, and only just can reach matching status by regulating the input and output impedance.So, when the input impedance of the five equilibrium power divider of integrated band-pass filtering function is identical with output impedance, the input impedance of each single-frequency bandwidth-limited circuit is 100 ohm, when output impedance is 50 ohm, and between two circuit and connect an isolation resistance, namely consist of a typical Wilkinson power divider.
Embodiment
The structure of the five equilibrium power divider of integrated band-pass filtering function as shown in Figure 1, relevant dimensions is illustrated in fig. 3 shown below.The thickness of medium substrate is 0.81mm, and relative dielectric constant is 3.38.Be connected to the resistance of the isolated component 18 employing 5.1k ohms between the single-frequency bandwidth-limited circuit, to strengthen isolation.As shown in Figure 3, each resonator length of single-frequency bandwidth-limited circuit
LResonance frequency for described single-frequency bandwidth-limited circuit
fCorresponding wavelength
λ1/4th, L is L1, L2, the summation of L3 and L4.According to Fig. 3 design power distributor, to obtain transmission characteristic and out-of band rejection characteristic in required input, output-resistor characteristic, the frequency band.
Fig. 4 a is the simulation result of transmission characteristic of the five equilibrium power divider of an integrated band-pass filtering function designing according to above-mentioned parameter; Transverse axis among the transfer curve figure represents frequency, and the longitudinal axis represents transmission characteristic, wherein S
11The return loss that represents the five equilibrium power divider of integrated band-pass filtering function, S
21The insertion loss of expression from input port I/P to the first output port O/P1, S
31The insertion loss of expression from input port I/P to the second output port O/P2; By simulation result as seen, the insertion loss curve S of actual test
21And S
31The basic coincidence, the centre frequency of passband is at 2GHz, at the insertion loss S of center frequency point
21And S
31For-4.0dB.Because the integrated cause of single-frequency bandwidth-limited circuit, the insertion loss of the five equilibrium power divider of integrated band-pass filtering function will be a bit larger tham the power divider of standard.In center frequency point, the return loss S of the five equilibrium power divider of integrated band-pass filtering function
11Be-31dB, and on the passband both sides transmission zero arranged respectively, improved greatly the roll-off characteristic of filter function in the power divider.Fig. 4 b is the output return loss S of the five equilibrium power divider of an integrated band-pass filtering function designing according to above-mentioned parameter
22With isolating coefficient S
23Simulation result.Output return loss S on center frequency point
22For-15dB, the isolating coefficient S of port 2 and port 3
23For-22dB.
The simulation result of embodiment shows that the utility model device has two functions, not only can mean allocation input energy, can also filter out needed frequency range.
The above only is preferred embodiments of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1. the five equilibrium power divider of integrated band-pass filtering function, comprise upper strata microstrip structure, isolated component, interlayer substrate and lower floor's grounding plate, the upper strata microstrip structure is attached to interlayer plate upper surface, and interlayer plate lower surface is grounded metal; It is characterized in that: the upper strata microstrip structure comprises two single-frequency bandwidth-limited circuits, two single band pass filter circuit structures are identical, be arranged into laterally zygomorphic structure, two single-frequency bandwidth-limited circuits share an input port as the input port (I/P) of the five equilibrium power divider of integrated band-pass filtering function, and the output port of two single-frequency bandwidth-limited circuits is as the first output port (O/P1) and second output port (O/P2) of the five equilibrium power divider of integrated band-pass filtering function.
2. the five equilibrium power divider of described integrated band-pass filtering function according to claim 1, it is characterized in that the single-frequency bandwidth-limited circuit that is positioned at the top is comprised of three quarter-wave resonance device couplings, is respectively the first resonator (1), the second resonator (2) and the 3rd resonator (3); Wherein the first resonator (1) is the top open circuit of the first microstrip line (4), the second microstrip line (5), the 3rd microstrip line (6) and the 4th microstrip line (7) formation of successively connection, the microstrip line of terminal ground connection; The second resonator (2) is the top ground connection that the 5th microstrip line (8), the 6th microstrip line (9), the 7th microstrip line (10), the 8th microstrip line (11), the 9th microstrip line (12) and the tenth microstrip line (13) of successively connection consists of, the microstrip line of terminal open circuit; The 3rd resonator (3) is the top ground connection that the 11 microstrip line (14), the 12 microstrip line (15), the 13 microstrip line (16) and the 14 microstrip line (17) of successively connection consists of, the microstrip line of terminal open circuit; Wherein the second microstrip line (5) and the 13 microstrip line (16) coupling, the 3rd microstrip line (6) and the 12 microstrip line (15) coupling, the 4th microstrip line (7) and the 5th microstrip line (8) coupling, an end of the 5th microstrip line (8) and the coupling of an end of the 11 microstrip line (14); The open end of the first resonator (1) is connected with input port (I/P), and 13 microstrip lines (16) of the 3rd resonator (3) are connected with the first output port (O/P1); One end of isolated component (18) is connected with the open end of the second resonator (2) that is positioned at the top, and the other end is connected with the open end of the corresponding resonator of single-frequency bandwidth-limited circuit that is positioned at the below.
3. the five equilibrium power divider of described integrated band-pass filtering function according to claim 2 is characterized in that the length of quarter-wave resonance device
LResonance frequency for described single-frequency bandwidth-limited circuit
fCorresponding wavelength
λ1/4th; Wherein,
LBe actual microstrip line length.
4. the five equilibrium power divider of described integrated band-pass filtering function according to claim 2, the input impedance of five equilibrium power divider that it is characterized in that integrated band-pass filtering function is identical with output impedance, and the input and output impedance of each single-frequency bandwidth-limited circuit regulates to realize coupling by the stiffness of coupling and the port position that change between the resonator.
5. the five equilibrium power divider of each described integrated band-pass filtering function is characterized in that isolated component (18) is resistance, electric capacity or inductance according to claim 1 ~ 4.
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| CN 201220414361 CN202737076U (en) | 2012-08-21 | 2012-08-21 | Equal power distributor integrated with band-pass filtering function |
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| CN 201220414361 CN202737076U (en) | 2012-08-21 | 2012-08-21 | Equal power distributor integrated with band-pass filtering function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832434A (en) * | 2012-08-21 | 2012-12-19 | 华南理工大学 | Equal power splitter integrating band-pass filtering function |
| TWI628843B (en) * | 2016-05-20 | 2018-07-01 | 新加坡商雲網科技新加坡有限公司 | Power distribution circuit and power divider using the same |
| TWI637553B (en) * | 2016-05-20 | 2018-10-01 | 新加坡商雲網科技新加坡有限公司 | Power distribution circuit and power divider using the same |
| CN112838840A (en) * | 2020-12-31 | 2021-05-25 | 南京航空航天大学 | Broadband equal-power distribution/synthesis circuit topology with broadband deep isolation |
-
2012
- 2012-08-21 CN CN 201220414361 patent/CN202737076U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832434A (en) * | 2012-08-21 | 2012-12-19 | 华南理工大学 | Equal power splitter integrating band-pass filtering function |
| CN102832434B (en) * | 2012-08-21 | 2014-10-08 | 华南理工大学 | Equal power splitter integrating band-pass filtering function |
| TWI628843B (en) * | 2016-05-20 | 2018-07-01 | 新加坡商雲網科技新加坡有限公司 | Power distribution circuit and power divider using the same |
| TWI637553B (en) * | 2016-05-20 | 2018-10-01 | 新加坡商雲網科技新加坡有限公司 | Power distribution circuit and power divider using the same |
| CN112838840A (en) * | 2020-12-31 | 2021-05-25 | 南京航空航天大学 | Broadband equal-power distribution/synthesis circuit topology with broadband deep isolation |
| CN112838840B (en) * | 2020-12-31 | 2024-03-22 | 南京航空航天大学 | Broadband equal-power distribution/synthesis circuit topology with broadband deep isolation |
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