CN102881981A - Lumped element power divider integrated with band-pass filtering function - Google Patents
Lumped element power divider integrated with band-pass filtering function Download PDFInfo
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- CN102881981A CN102881981A CN2012103180929A CN201210318092A CN102881981A CN 102881981 A CN102881981 A CN 102881981A CN 2012103180929 A CN2012103180929 A CN 2012103180929A CN 201210318092 A CN201210318092 A CN 201210318092A CN 102881981 A CN102881981 A CN 102881981A
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Abstract
The invention discloses a lumped element power divider integrated with a band-pass filtering function. The lumped element power divider comprises an upper lumped element structure layer, an intermediate dielectric substrate layer and a lower grounding metal layer, wherein the power divider for a single-frequency band-pass filter with the lumped element comprises three branches; one branch is grounded through a resonator, and the additional two branches respectively consist of three resonators; the intersection of the two branches is connected through a matched resistor; and the input impedance and the output impedance of the power divider for the single-frequency band-pass filter with the lumped element are the same. The power divider for the single-frequency band-pass filter designed by employing combination of the power divider and the filter can be used for various radio frequency front-end systems and has the power distribution and frequency selection functions, the integration and miniaturization of the device are promoted, and the model has high originality.
Description
Technical field
The present invention relates to a kind of power divider with filter function, particularly a kind of lamped element power divider distributor based on integrated band-pass filtering function can be applicable to the power divider with filter 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 almost all will use in all aerial arrays and balancing circuitry.And band pass filter is another kind of indispensable device in the wireless communication system, because it can isolate the frequency band that needs.These two kinds of devices 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.
On the other hand, band pass filter also is important field of research in the passive circuit design.The single-pass band is two different research directions with comb filter.On the one hand, ultra broadband, harmonic wave suppresses and tunable filter is that single-pass band Design of Bandpass will be considered emphatically.On the other hand, the stepped impedance filter is widely used in the design of many passbands band pass filter.Recently, there are some researches show that the multifrequency response can be loaded into the resonator center by the open circuit detail and obtain.
In a lot of devices, power divider and filter need to link together to realize to separate the function with filtered signal usually.Yet their characteristic own is all just paid attention in all power dividers above-mentioned and filter research, 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.Therefore, in order to reduce size, double-function device has demand.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, and no. 12, pp. 2830-2833, Dec mentions in 2010., and Π-type transmission line can be integrated in the power divider, yet, just can be used for realizing characteristic with Π-type transmission line rather than real filter in the article.Up to the present, lamped element not yet occurs using, really filter is integrated into device in the power divider, in order to fill up this blank, the present invention proposes a kind of power divider of single band bandpass filter of novel lamped element.
Summary of the invention
A kind of power divider of novel single band bandpass filter based on lamped element has been proposed in the present invention.Among the design, lumped element filters is used as impedance transducer to replace traditional quarter-wave transmission line.Resistance is as isolation, and matching element is connected in the output of two lumped element filters to obtain good isolation effect and matching effect.Because integrated single band bandpass filter in the power divider, so can realize simultaneously the function that power division and frequency are selected.
For realizing the object of the invention, the technical solution adopted in the present invention is as follows:
The lamped element power divider distributor of integrated band-pass filtering function comprises upper strata lumped element configuration, interlayer substrate and lower floor's grounded metal; The upper strata lumped element configuration is attached to the interlayer upper surface of base plate, and lower floor's grounding plate is attached to the interlayer base lower surface; It is characterized in that: the upper strata lumped element configuration comprises main transmission line and three branch roads that are connected with main transmission line, one of them branch road is by the first resonator ground connection, two other branch road all is connected with the second resonator, the 3rd resonator and the 4th resonator separately, the second resonator is serially connected in the branch road, and the 3rd resonator and the 4th resonator all have an end to be attempted by on the branch road and other end ground connection; Circuit structure on two branch roads is in full accord, and two branch roads are symmetrically distributed in the interlayer upper surface of base plate; The second resonator, the 3rd resonator and the 4th resonator form a filter, two described filters on two branch roads share an input port, the output port of two described filters has formed two output ports of the lamped element power divider distributor of described integrated band-pass filtering function, and these two output ports also are connected to a build-out resistor.
The lamped element power divider distributor of above-mentioned integrated band-pass filtering function is characterized in that described the first resonator comprises electric capacity and the inductance that is connected in parallel; The second resonator comprises electric capacity and the inductance that is connected in parallel; The 3rd resonator comprises electric capacity and the inductance that is connected in series; The 4th resonator comprises electric capacity and the inductance that is connected in parallel.
The lamped element power divider distributor of above-mentioned integrated band-pass filtering function, it is characterized in that, connected by microstrip line between the second resonator, the 3rd resonator and the 4th resonator, wherein the second resonator is connected on the main transmission line, directly determines the left side transmission zero of filter passband; The 3rd resonator and the 4th resonator are directly parallel on the branch road by microstrip line, and the 3rd resonator directly determines the right transmission zero of filter.
The power divider of the single band bandpass filter of the lamped element of the high selectivity of above-mentioned miniaturization, during resonator resonance, the phase deviation that the input end signal of the logical lumped element filters of terminal single band and output end signal have approximately-90 °.
The power divider of the single band bandpass filter of the lamped element of the high selectivity of above-mentioned miniaturization, the input impedance of the power divider of the single band bandpass filter of lamped element is identical with output impedance, the input impedance of the power divider of the single band bandpass filter of the input and output impedance of the logical lumped element filters of each terminal single band is integrated lamped element or 1 times of output impedance.
The power divider of the single band bandpass filter of the lamped element of the high selectivity of above-mentioned miniaturization, isolated component are resistance.
With respect to prior art, the present invention has following advantage:
1) integrated single band bandpass filter in traditional power divider, can realize simultaneously the function of power division and trap signal, and size has more greatly than independent two discrete power dividers and filter and reduces, and is conducive to the integrated and miniaturization of radio-frequency front-end system.
The power divider of (2) integrated single band bandpass filter has the system that forms than traditional discrete power divider and filter bank that lower insertion loss is arranged.
(3) based on lamped element integrated the power divider of single band bandpass filter more be conducive to integrated and miniaturization.
Description of drawings
Fig. 1 is the structure chart of the lamped element power divider distributor of integrated band-pass filtering function;
Fig. 2 is the structure schematic diagram of the lamped element power divider distributor of integrated band-pass filtering function;
Fig. 3 is the transfer curve figure of the lamped element power divider distributor of integrated band-pass filtering function;
Fig. 4 is the lamped element power divider distributor of integrated band-pass filtering function changes left side transmission zero by the inductance that increases the second resonator curve chart;
Fig. 5 is the lamped element power divider distributor of integrated band-pass filtering function changes the right transmission zero by the inductance that reduces the 3rd resonator curve chart;
Fig. 6 is the output return loss of lamped element power divider distributor of integrated band-pass filtering function and the curve chart of isolating coefficient.
Specific embodiments
The present invention is further detailed explanation below in conjunction with accompanying drawing, but the scope of protection of present invention is not limited to the scope of lower example statement.
As shown in Figure 1, the lamped element power divider distributor of integrated band-pass filtering function comprises upper strata lumped element configuration, interlayer substrate and lower floor's grounded metal; The upper strata lumped element configuration is attached to the interlayer upper surface of base plate, and lower floor's grounding plate is attached to the interlayer base lower surface; It is characterized in that: the upper strata lumped element configuration comprises main transmission line and three branch roads that are connected with main transmission line, one of them branch road is by the first resonator ground connection, two other branch road all is connected with the second resonator, the 3rd resonator and the 4th resonator separately, the second resonator is serially connected in the branch road, and the 3rd resonator and the 4th resonator all have an end to be attempted by on the branch road and other end ground connection; Circuit structure on two branch roads is in full accord, and two branch roads are symmetrically distributed in the interlayer upper surface of base plate; The second resonator, the 3rd resonator and the 4th resonator form a filter, two described filters on two branch roads share an input port, the output port of two described filters has formed two output ports of the lamped element power divider distributor of described integrated band-pass filtering function, and these two output ports also are connected to a build-out resistor.
The lamped element power divider distributor of above-mentioned integrated band-pass filtering function is characterized in that described the first resonator comprises electric capacity and the inductance that is connected in parallel; The second resonator comprises electric capacity and the inductance that is connected in parallel; The 3rd resonator comprises electric capacity and the inductance that is connected in series; The 4th resonator comprises electric capacity and the inductance that is connected in parallel.
The lamped element power divider distributor of above-mentioned integrated band-pass filtering function, it is characterized in that, connected by microstrip line between the second resonator, the 3rd resonator and the 4th resonator, wherein the second resonator is connected on the main transmission line, directly determines the left side transmission zero of filter passband; The 3rd resonator and the 4th resonator are directly parallel on the branch road by microstrip line, and the 3rd resonator directly determines the right transmission zero of filter.
Embodiment
5, the structure of the lamped element power divider distributor of integrated band-pass filtering function is shown in figure one, and relevant dimensions is illustrated in fig. 2 shown below.The thickness of medium substrate is 0.81mm, and relative dielectric constant is 3.38, and loss angle tangent is 0.0027.
The first electric capacity 8 of the first resonator is 4.8 ± 0.2pF, and the first inductance 13 is 2.7 ± 0.2nH; The second electric capacity 1 in the second resonator is 3.5 ± 0.2pF, and the second inductance 5 is 20.0 ± 2nH; The 3rd electric capacity 2 in the 3rd resonator is 7.0 ± 1pF, and the 3rd inductance 6 is 4.0 ± 1nH; The 4th electric capacity 3 in the 4th resonator is 4.0 ± 1pF, and the 4th inductance 7 is 1.5 ± 0.2nH; Described build-out resistor 4 is 110 ± 10 Ω.
Fig. 3 is the result of emulation of transmission characteristic of the lamped element power divider distributor 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 of the power divider that represents the single band bandpass filter integrated, S
21During expression input port coupling, the insertion loss from the first output port to input port, S
31During expression input port coupling, the insertion loss from the second output port to input port; By simulation result as seen, the insertion loss curve S of emulation
21And S
31The basic coincidence, the centre frequency of passband is at 0.8GHz, and the 1dB relative bandwidth that emulation obtains is 10.1%, the insertion loss S in center frequency point that measures
21And S
31For-3.9dB.Because the integrated cause of filter, the insertion loss of the power of integrated single band bandpass filter will be a bit larger tham the power divider of standard.In passband, the return loss S of the power divider of integrated single band bandpass filter
11All be higher than-20dB, and on the passband both sides transmission zero arranged respectively, improved greatly the roll-off characteristic of filter function in the power divider.Fig. 6 is the output return loss S of the lamped element power divider distributor of an integrated band-pass filtering function designing according to above-mentioned parameter
22With isolating coefficient S
23Simulation result.The output return loss S that obtains of emulation wherein
22Be higher than-20dB; On operating frequency point, the port 2 that emulation obtains with the isolating coefficient of port 3 is-30dB.
Fig. 4 is the lamped element power divider distributor of an integrated band-pass filtering function designing according to above-mentioned parameter, by increasing the inductance of the second resonator, so that S
21And S
31The skew of turning left of left side transmission zero.Fig. 5 is by reducing the inductance of the 3rd resonator, so that S
21And S
31The skew of turning right of the right transmission zero.
The simulation result of embodiment shows that device of the present invention 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 invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the lamped element power divider distributor of integrated band-pass filtering function comprises upper strata lumped element configuration, interlayer substrate and lower floor's grounded metal; The upper strata lumped element configuration is attached to the interlayer upper surface of base plate, and lower floor's grounding plate is attached to the interlayer base lower surface; It is characterized in that: the upper strata lumped element configuration comprises main transmission line and three branch roads that are connected with main transmission line, one of them branch road is by the first resonator ground connection, two other branch road all is connected with the second resonator, the 3rd resonator and the 4th resonator separately, the second resonator is serially connected in the branch road, and the 3rd resonator and the 4th resonator all have an end to be attempted by on the branch road and other end ground connection; Circuit structure on two branch roads is in full accord, and two branch roads are symmetrically distributed in the interlayer upper surface of base plate; The second resonator, the 3rd resonator and the 4th resonator form a filter, two described filters on two branch roads share an input port, the output port of two described filters has formed two output ports of the lamped element power divider distributor of described integrated band-pass filtering function, and these two output ports also are connected to a build-out resistor.
2. the lamped element power divider distributor of integrated band-pass filtering function according to claim 1 is characterized in that, described the first resonator comprises electric capacity and the inductance that is connected in parallel; The second resonator comprises electric capacity and the inductance that is connected in parallel; The 3rd resonator comprises electric capacity and the inductance that is connected in series; The 4th resonator comprises electric capacity and the inductance that is connected in parallel.
3. the lamped element power divider distributor of integrated band-pass filtering function according to claim 2 is characterized in that, is connected by microstrip line between the second resonator, the 3rd resonator and the 4th resonator, and wherein the second resonator is connected on the main transmission line; The 3rd resonator and the 4th resonator are directly parallel on the branch road by microstrip line.
4. according to claim 2 or the lamped element power divider distributor of 3 described integrated band-pass filtering functions, it is characterized in that, the operating frequency of described power divider is 800MHz, and first electric capacity (8) of the first resonator is 4.8 ± 0.2pF, and the first inductance (13) is 2.7 ± 0.2nH; The second electric capacity (1) in the second resonator is 3.5 ± 0.2pF, and the second inductance (5) is 20.0 ± 2nH; The 3rd electric capacity (2) in the 3rd resonator is 7.0 ± 1pF, and the 3rd inductance (6) is 4.0 ± 1nH; The 4th electric capacity (3) in the 4th resonator is 4.0 ± 1pF, and the 4th inductance (7) is 1.5 ± 0.2nH; Described build-out resistor (4) is 110 ± 10 Ω.
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| CN2012103180929A CN102881981A (en) | 2012-08-31 | 2012-08-31 | Lumped element power divider integrated with band-pass filtering function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332534A (en) * | 2017-07-02 | 2017-11-07 | 中国航空工业集团公司雷华电子技术研究所 | A kind of circuit structure and its design method for filtering power splitter |
| CN107403988A (en) * | 2016-05-20 | 2017-11-28 | 鸿富锦精密工业（深圳）有限公司 | The power divider of power distributing circuit and the application power distributing circuit |
| CN107403989A (en) * | 2016-05-20 | 2017-11-28 | 鸿富锦精密工业（深圳）有限公司 | The power divider of power distributing circuit and the application power distributing circuit |
| 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 |
| CN109510604A (en) * | 2018-11-13 | 2019-03-22 | 上海艾为电子技术股份有限公司 | A kind of filter circuit applied to radio-frequency front-end |
| CN111162360A (en) * | 2020-01-07 | 2020-05-15 | 上海科技大学 | Dual-frequency band-pass response lumped element power divider with-/+ 45 DEG phase shift |
| CN113922032A (en) * | 2021-10-08 | 2022-01-11 | 南京国博电子股份有限公司 | Filtering power divider with third-order filtering response |
| CN116527009A (en) * | 2023-06-20 | 2023-08-01 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
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Cited By (14)
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| US10097154B2 (en) | 2016-05-20 | 2018-10-09 | Nanning Fugui Precision Industrial Co., Ltd. | Power dividing circuit and power divider |
| CN107403988A (en) * | 2016-05-20 | 2017-11-28 | 鸿富锦精密工业（深圳）有限公司 | The power divider of power distributing circuit and the application power distributing circuit |
| CN107403989A (en) * | 2016-05-20 | 2017-11-28 | 鸿富锦精密工业（深圳）有限公司 | The power divider of power distributing circuit and the application power distributing circuit |
| 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 |
| US10079588B2 (en) * | 2016-05-20 | 2018-09-18 | Nanning Fugui Precision Industrial Co. Ltd. | Power dividing circuit and power divider |
| 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 |
| CN107332534A (en) * | 2017-07-02 | 2017-11-07 | 中国航空工业集团公司雷华电子技术研究所 | A kind of circuit structure and its design method for filtering power splitter |
| CN109510604A (en) * | 2018-11-13 | 2019-03-22 | 上海艾为电子技术股份有限公司 | A kind of filter circuit applied to radio-frequency front-end |
| CN109510604B (en) * | 2018-11-13 | 2023-10-13 | 上海艾为电子技术股份有限公司 | Filter circuit applied to radio frequency front end |
| CN111162360A (en) * | 2020-01-07 | 2020-05-15 | 上海科技大学 | Dual-frequency band-pass response lumped element power divider with-/+ 45 DEG phase shift |
| CN113922032A (en) * | 2021-10-08 | 2022-01-11 | 南京国博电子股份有限公司 | Filtering power divider with third-order filtering response |
| CN113922032B (en) * | 2021-10-08 | 2024-01-02 | 南京国博电子股份有限公司 | Filtering power divider with third-order filtering response |
| CN116527009A (en) * | 2023-06-20 | 2023-08-01 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
| CN116527009B (en) * | 2023-06-20 | 2023-12-05 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
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Application publication date: 20130116 |