CN202997024U - Non-equant power divider integrated with band-pass filtering function - Google Patents
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Abstract
The utility model discloses a non-equant power divider integrated with a band-pass filtering function. The non-equant power divider integrated with the band-pass filtering functioncomprises an upper-layer microstrip structure, an isolating element, an intermediate layer medium substrate and a lower-layer grounding metal plate. Each non-equant power divider integrated with the band-pass filtering function comprises two single frequency band-pass filtering circuits and the isolating element connected between the two single frequency band-pass filtering circuits, the input impedance and the output impedance of the non-equant power divider are same, and the input and output impedances of each single frequency band-pass filtering circuit can be adjusted by changing a coupling intensity and a port position between resonators to thereby carry out the power distribution of different rates and realize matching. The non-equant power divider integrated with the band-pass filtering function of the utility model enables the one-fourth wavelength impedance transformation segment needed by a conventional Wilkinson non-equant power divider at an output port to be saved and the dimension to be reduced effectively, can be used in various radio frequency front-end systems, has the power distribution and the frequency selection functions simultaneously, and is conducive to the integration and miniaturization of the device.
Description
Technical Field
The utility model relates to a power divider with filtering capability, in particular to non-uniform power divider that can be applied to the integrated single-frequency band-pass filtering capability of radio frequency front end circuit.
Background
Power dividers are a fundamental part of microwave circuits and are used in many antenna arrays and balanced circuits because of their ability to separate and combine signals. The band pass filter circuit is another indispensable part of the wireless communication system because it can separate a desired frequency band. Both of these elements are present in many microwave systems.
Over the past several decades, there has been a great deal of research on power splitters. The focus of research is on broadening the band, reducing the area, dual frequency response and harmonic rejection. Meanwhile, the band-pass filter circuit is also an important research field in passive circuit design. Single-passband and multi-passband filter circuits are two different directions of research. The research focuses on the aspects of reducing the volume, improving the frequency selectivity, flexibly controlling the working frequency and the bandwidth of a plurality of pass bands, increasing the transmission zero point and the like.
In many rf subsystems, the power splitter and the filter circuit are typically connected together to perform the functions of separating and filtering the signals. However, all the above mentioned studies of power dividers and filter circuits only focus on their own characteristics, and there are few possibilities to consider the combination of the two. Conventional systems typically employ discrete devices to perform both functions, but such dimensions can be quite large.
And the single device with double functions can simultaneously have two functions, and can meet the requirement of miniaturization. Some researchers have studied dual-function devices with both splitting/combining power signals and frequency selection. A Wilkinson Power Divider design with both Bandpass Response and Harmonic Suppression is proposed in the documents 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 this design, interdigitated stepped impedance coupled lines are used to implement the function. In addition, it is mentioned in the documents x.y. Tang and k. mouthan, "Filter Integrated Wilkinson Power Dividers," Microwave and Optical Technology Letters, vol.52, No. 12, pp. 2830-.
In addition, in the radio frequency circuit, there is often a requirement for unbalanced distribution of radio frequency power, so that the non-uniform microstrip power divider has an important application value in the actual radio frequency circuit. Compared with an equal power divider, the design of a non-equal microstrip power divider is more complex, and the power divider is required to be as small as possible and easy to integrate while realizing power unbalanced distribution. In document d, Hawatmeh, k.a. shamaleh and n. Dib, "Design and Analysis of Compact un square-Split Wilkinson Power Divider Using Non-Uniform Transmission Lines," Applied Electrical Engineering and Computing Technologies, pp.1-6, Dec, 2011, the authors have replaced the conventional Uniform Transmission Lines with Non-Uniform Transmission Lines, which effectively reduces the size, but this configuration still requires a quarter-wavelength impedance transformation section at the output port location, which does not further reduce the size, and has no filtering function.
Consider the demand of small-size and the unbalanced distribution of radio frequency power, the utility model provides a novel integrated band-pass filtering function's unequal power divider. Need add the quarter wavelength impedance transformation section for traditional wilkinson power divider at output port department, the utility model provides a design can save this quarter wavelength impedance transformation section, has effectively reduced the size, has realized the unbalanced distribution of power simultaneously.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that prior art exists, provided the unequal power divider of integrated band-pass filtering function. The utility model discloses in, single-frequency band-pass filter circuit is used as impedance converter in order to replace traditional quarter wavelength transmission line. The input impedance of the single-frequency band-pass filter circuit positioned above and the input impedance of the single-frequency band-pass filter circuit positioned below are different, so that unequal power distribution can be realized. And the input and output impedances of the two single-frequency band-pass filter circuits can be adjusted by changing the coupling strength between the resonators and the port positions so as to distribute power with different ratios and realize matching. The resistor, the capacitor or the inductor is used as an isolation element and connected to the open ends of the two single-frequency band-pass filter circuits so as to obtain a good isolation effect. The proposed structure has a smaller size because of the special position of the placement of the isolation devices, which can improve the integration level of the circuit. Because the power divider is integrated with the single-frequency band-pass filter circuit, and the input impedance of the two single-frequency band-pass filter circuits is different, the functions of frequency selection and unequal power division can be realized simultaneously.
For realizing the purpose of the utility model, the utility model discloses the technical scheme who adopts as follows:
the non-equal power divider integrating the band-pass filtering function comprises an upper-layer microstrip structure, an isolation element, a middle-layer dielectric substrate and a lower-layer grounding metal plate, wherein the upper-layer microstrip structure is attached to the upper surface of the middle-layer dielectric plate, and the lower surface of the middle-layer dielectric plate is made of grounding metal; the method is characterized in that: the upper-layer microstrip structure comprises two single-frequency band-pass filter circuits, the input impedances of the two single-frequency band-pass filter circuits are different so as to realize unequal distribution of power, the two single-frequency band-pass filter circuits share one input port to serve as the input port I/P of the unequal power distributor with the integrated band-pass filter function, and the output ports of the two single-frequency band-pass filter circuits serve as the first output port O/P1 and the second output port O/P2 of the unequal power distributor with the integrated band-pass filter function.
In the non-uniform power divider integrating the band-pass filtering function, the single-frequency band-pass filtering circuit positioned above is formed by coupling three quarter-wavelength resonators, namely a first resonator, a second resonator and a third resonator; the first resonator is a microstrip line with an open circuit at the starting end and a grounded tail end, and the microstrip line consists of a first microstrip line, a second microstrip line, a third microstrip line and a fourth microstrip line which are connected in sequence; the second resonator is a microstrip line with a grounded initial end and an open tail end, and the microstrip line consists of a fifth microstrip line, a sixth microstrip line, a seventh microstrip line, an eighth microstrip line, a ninth microstrip line and a tenth microstrip line which are connected in sequence; the third resonator is a microstrip line with a grounded initial end and an open tail end, and the microstrip line is formed by an eleventh microstrip line, a twelfth microstrip line, a thirteenth microstrip line, a fourteenth microstrip line and a fifteenth microstrip line which are connected in sequence; the second microstrip line is coupled with the thirteenth microstrip line, the third microstrip line is coupled with the twelfth microstrip line, the fourth microstrip line is coupled with the fifth microstrip line, and one end of the fifth microstrip line is coupled with one end of the eleventh microstrip line; the open end of the first resonator is connected with the input port I/P, and the thirteenth microstrip line of the third resonator is connected with the first output port O/P; the single-frequency band-pass filter circuit positioned below is formed by coupling three quarter-wavelength resonators, namely a fourth resonator, a fifth resonator and a sixth resonator; the fourth resonator is a microstrip line with an open circuit at the starting end and a grounded tail end, and the microstrip line consists of a sixteenth microstrip line, a seventeenth microstrip line, an eighteenth microstrip line and a nineteenth microstrip line which are sequentially connected; the fifth resonator is a microstrip line with an initial end grounded and a tail end open circuit, and the microstrip line is formed by a twentieth microstrip line, a twenty-first microstrip line, a twenty-second microstrip line, a twenty-third microstrip line, a twenty-fourth microstrip line and a twenty-fifth microstrip line which are connected in sequence; the sixth resonator is a microstrip line with a grounded initial end and an open-circuit tail end, and the microstrip line consists of a twenty-sixth microstrip line, a twenty-seventh microstrip line, a twenty-eighth microstrip line, a twenty-ninth microstrip line and a thirty microstrip line which are connected in sequence; the seventeenth microstrip line is coupled with the twenty-ninth microstrip line, the eighteenth microstrip line is coupled with the twenty-eighth microstrip line, the nineteenth microstrip line is coupled with the twentieth microstrip line, and one end of the twentieth microstrip line is coupled with one end of the twenty-seventh microstrip line; the open end of the fourth resonator is connected with the input port I/P, and the twenty-eighth microstrip line of the sixth resonator is connected with the second output port O/P; one end of the isolation element is connected to the open end of the second resonator located above, and the other end is connected to the open end of the fifth resonator located below.
According to the non-uniform power distributor integrating the band-pass filtering function, the input impedance of the single-frequency band-pass filtering circuit positioned above and the input impedance of the single-frequency band-pass filtering circuit positioned below are different, so that unequal power distribution can be realized. The input and output impedance of each single-frequency band-pass filter circuit can be adjusted by changing the coupling strength between the resonators and the port position so as to distribute power in different ratios and realize matching, and compared with a cascade structure of the filter circuit and the unequal power divider, the structure can save an impedance transformation section of a quarter wavelength required by the traditional Wilkinson unequal power divider at an output port, and effectively reduces the size.
The non-equal power divider with integrated band-pass filtering function has the length of a quarter-wave resonatorLIs the resonance frequency of the single-frequency band-pass filter circuitfCorresponding wavelengthλOne fourth of (a); wherein,Lis the actual microstrip line length.
According to the non-equal power divider integrating the band-pass filtering function, the left transmission zero point and the right transmission zero point of the passband of the single-frequency band-pass filtering circuit are generated by cross coupling among the resonators.
In the above non-equal power divider integrating the band-pass filtering function, the isolation element 36 is a resistor, a capacitor or an inductor.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the band-pass filtering function is integrated in the traditional power divider, and the functions of power division and signal filtering can be realized simultaneously.
(2) The input impedance of the single-frequency filter circuit can be changed by changing the coupling strength between the resonators and the position of the port to obtain power distribution with different ratios, and compared with a cascade structure of the filter circuit and the unequal power divider, the structure can omit an impedance transformation section with a quarter wavelength required by the traditional Wilkinson unequal power divider at the output port, the size is greatly reduced, and the integration and the miniaturization of a radio frequency front-end system are facilitated.
(3) The non-equal power divider with integrated band-pass filtering function has lower insertion loss than the traditional system formed by combining a discrete power divider and a filter.
Drawings
Fig. 1 is a block diagram of a 2:1 non-equally dividing power divider with integrated bandpass filtering.
Fig. 2 is a graph of the transmission characteristics of a single frequency bandpass filter circuit.
Fig. 3 is a block diagram of a 4:1 non-equally dividing power divider with integrated bandpass filtering.
Fig. 4a is a graph of the transmission characteristics of a 2:1 non-equally dividing power divider with integrated bandpass filtering.
Figure 4b is the output return loss and isolation factor of a 2:1 non-equally divided power divider with integrated bandpass filtering.
Fig. 5a is a graph of the transmission characteristics of a 4:1 non-equally dividing power divider with integrated bandpass filtering.
Figure 5b is the output return loss and isolation factor of a 4:1 non-equally dividing power divider with integrated bandpass filtering.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, but the scope of the invention is not limited to the following examples.
As shown in fig. 1, the microstrip patch comprises an upper layer microstrip structure, an isolation element, a middle layer dielectric substrate and a lower layer grounding metal plate, wherein the upper layer microstrip structure is attached to the upper surface of the middle layer dielectric plate, and the lower surface of the middle layer dielectric plate is grounding metal; the method is characterized in that: the upper-layer microstrip structure comprises two single-frequency band-pass filter circuits, the input impedances of the two single-frequency band-pass filter circuits are different so as to realize unequal distribution of power, one input port is shared by the two single-frequency band-pass filter circuits and serves as an input port I/P of the unequal power distributor with the integrated band-pass filter function, and output ports of the two single-frequency band-pass filter circuits serve as a first output port O/P1 and a second output port O/P2 of the unequal power distributor with the integrated band-pass filter function; the first isolation element 36 has one end connected to the open end of the second resonator 2 located above and the other end connected to the open end of the fifth resonator 5 located below. The first isolation element 36 may be a resistor, a capacitor, or an inductor.
As shown in fig. 1, each single-frequency bandpass filter circuit is formed by coupling three quarter-wavelength resonators; length of quarter wave resonatorLIs the resonance frequency of the single-frequency band-pass filter circuitfCorresponding wavelengthλOne fourth of (a); wherein,Lis the actual microstrip line length.
As shown in fig. 1, the single-frequency band-pass filter circuit located above is formed by coupling three quarter-wavelength resonators, namely a first resonator 1, a second resonator 2 and a third resonator 3; the first resonator 1 is a microstrip line with an open start end and a grounded tail end, and the microstrip line is formed by a first microstrip line 7, a second microstrip line 8, a third microstrip line 9 and a fourth microstrip line 10 which are connected in sequence; the second resonator 2 is a microstrip line with a grounded initial end and an open tail end, and the microstrip line is composed of a fifth microstrip line 11, a sixth microstrip line 12, a seventh microstrip line 13, an eighth microstrip line 14, a ninth microstrip line 15 and a tenth microstrip line 16 which are connected in sequence; the third resonator 3 is a microstrip line with a grounded initial end and an open tail end, and the microstrip line is composed of an eleventh microstrip line 17, a twelfth microstrip line 18, a thirteenth microstrip line 19, a fourteenth microstrip line 20 and a fifteenth microstrip line 21 which are connected in sequence; the second microstrip line 8 is coupled with the thirteenth microstrip line 19, the third microstrip line 9 is coupled with the twelfth microstrip line 18, the fourth microstrip line 10 is coupled with the fifth microstrip line 11, and one end of the fifth microstrip line 11 is coupled with one end of the eleventh microstrip line 17; the open end of the first resonator 1 is connected with the input port I/P, and the thirteenth microstrip line 19 of the third resonator 3 is connected with the first output port O/P1; the single-frequency band-pass filter circuit positioned below is formed by coupling three quarter-wavelength resonators, namely a fourth resonator 4, a fifth resonator 5 and a sixth resonator 6; the fourth resonator 4 is a microstrip line with an open start end and a grounded tail end, and the microstrip line is composed of a sixteenth microstrip line 22, a seventeenth microstrip line 23, an eighteenth microstrip line 24 and a nineteenth microstrip line 25 which are connected in sequence; the fifth resonator 5 is a microstrip line with a grounded initial end and an open tail end, and the microstrip line is composed of a twentieth microstrip line 26, a twenty-first microstrip line 27, a twenty-second microstrip line 28, a twenty-third microstrip line 29, a twenty-fourth microstrip line 30 and a twenty-fifth microstrip line 31 which are connected in sequence; the sixth resonator 6 is a microstrip line with a grounded start end and an open end, and the microstrip line is composed of a twenty-sixth microstrip line 31, a twenty-seventh microstrip line 32, a twenty-eighth microstrip line 33, a twenty-ninth microstrip line 34 and a thirty microstrip line 35 which are connected in sequence; the seventeenth microstrip line 23 is coupled with the twenty-ninth microstrip line 34, the eighteenth microstrip line 24 is coupled with the twenty-eighth microstrip line 33, the nineteenth microstrip line 25 is coupled with the twentieth microstrip line 26, and one end of the twentieth microstrip line 26 is coupled with one end of the twenty-seventh microstrip line 32; the open end of the fourth resonator 4 is connected to the input port I/P, and the twenty-eighth microstrip line of the sixth resonator 6 is connected to the second output port O/P2.
As shown in fig. 1, the single frequency bandpass filter circuit in the upper box has an input impedance of 150 ohms and an output impedance of 50 ohms. Fig. 2 is an amplitude simulation response of this single frequency bandpass filter circuit.
The input and output impedance of each single-frequency band-pass filter circuit can be adjusted by changing the coupling strength between the resonators and the port position so as to distribute power in different ratios and realize matching, and compared with a cascade structure of the filter circuit and the unequal power divider, the structure can save an impedance transformation section of a quarter wavelength required by the traditional Wilkinson unequal power divider at an output port. The single frequency bandpass filter circuit, shown in fig. 1, located above, has an input impedance of 75 ohms and an output impedance of 50 ohms; the input impedance of the single-frequency band-pass filter circuit located below is 150 ohms, and the output impedance of the single-frequency band-pass filter circuit is 50 ohms. The two single-frequency band-pass filter circuits are equivalently connected in parallel, so that the input impedance of the circuit after parallel connection is just matched with 50 ohms, and the power distribution ratio is 2: 1. A single-frequency band-pass filter circuit (the input and output ports of which correspond to those of fig. 1) located above the single-frequency band-pass filter circuit shown in fig. 3 has an input impedance of 62.5 ohms and an output impedance of 50 ohms; the input impedance of the single-frequency band-pass filter circuit positioned below is 250 ohms, the output impedance of the single-frequency band-pass filter circuit is 50 ohms, and the power distribution ratio is 4: 1. The input and output impedance of the single-frequency band-pass filter circuit can be adjusted by changing the coupling strength between the resonators and the port position to obtain power distribution with different ratios and realize matching, so that the single-frequency band-pass filter circuit can be used for replacing a quarter-wavelength transmission line used in the traditional power divider to realize the function of impedance transformation, the matching state can be achieved only by adjusting the input and output impedance, and a quarter-wavelength impedance transformation section required by the traditional Wilkinson non-equal division power divider at an output port can be omitted. Therefore, when the input impedance and the output impedance of the power divider integrated with the single-frequency band-pass filter are the same, two single-frequency band-pass filter circuits are connected in parallel, and an isolation resistor is connected in parallel between the two circuits, so that a typical Wilkinson power divider is formed.
Examples
The structure of the non-uniform power divider with the power division ratio of 2:1 and the integrated band-pass filtering function is shown in fig. 1, the thickness of the dielectric substrate is 0.81mm, and the relative dielectric constant is 3.38. The isolation element 36 connected between the single frequency bandpass filter circuits employs a 5.1k ohm resistor to enhance isolation. The structure of the non-uniform power divider with the power division ratio of 4:1 and the integrated band-pass filtering function is shown in fig. 3, the thickness of the dielectric substrate is 0.81mm, and the relative dielectric constant is 3.38. The second isolation element 37 connected between the single frequency band pass filter circuits employs a 12k ohm resistor to enhance isolation. The power splitter is designed according to fig. 1 and 3 to obtain the desired input and output impedance characteristics, in-band transmission characteristics and out-of-band attenuation characteristics.
Fig. 4a is a simulation result of the transmission characteristics of an unequal power divider with integrated band-pass filtering function designed according to fig. 1; the horizontal axis in the transmission characteristic graph represents frequency and the vertical axis represents transmission characteristic, where S11Representing the return loss, S, of a non-equal-division power divider integrating a band-pass filtering function21Representing the insertion loss, S, from the input port I/P to the first output port O/P131Represents the insertion loss from the input port I/P to the second output port O/P2; according to simulation results, the center frequency of the passband is 2GHz, and the insertion loss S at the center frequency point21Is-2.7 dB, S31Is-5.7 dB. Due to the fact that the single-frequency band-pass filter circuit is integrated, the insertion loss of the non-equal-division power divider integrating the band-pass filter function is slightly larger than that of a standard power divider. At a central frequency point, the return loss S of the non-equal power divider integrating the band-pass filtering function11Is-44 dB, and two transmission zeros are respectively arranged at two sides of the passband, thereby greatly improving the roll-off characteristic of the filtering function in the power divider. FIG. 4b shows the output return loss S of an integrated bandpass filter non-equal-division power divider designed according to FIG. 122，S33And an isolation systemNumber S23 And (4) obtaining a simulation result. Output return loss S at the central frequency point22Is-17 dB, S33Is-25 dB, the isolation coefficient S of port 2 and port 323Is-20 dB.
Fig. 5a is a simulation result of the transmission characteristics of an integrated band-pass filter function non-equal-division power divider designed according to fig. 3; the horizontal axis in the transmission characteristic graph represents frequency and the vertical axis represents transmission characteristic, where S11Representing the return loss, S, of a non-equal-division power divider integrating a band-pass filtering function21Indicating the insertion loss, S, from the first output port to the input port when the input ports match31Indicating the insertion loss from the second output port to the input port when the input ports match; according to simulation results, the center frequency of the passband is 2GHz, and the insertion loss S at the center frequency point21Is-2.2 dB, S31Is-8.2 dB. Due to the fact that the single-frequency band-pass filter circuit is integrated, the insertion loss of the non-equal-division power divider integrating the band-pass filter function is slightly larger than that of a standard power divider. At a central frequency point, the return loss S of the non-equal power divider integrating the band-pass filtering function11The power divider has-36 dB and two transmission zeros at two sides of the pass band, so that the roll-off characteristic of the filtering function in the power divider is greatly improved. FIG. 5b shows the output return loss S of an integrated bandpass filter non-equal-division power divider designed according to FIG. 322，S33And isolation factor S23 And (4) obtaining a simulation result. Output return loss S at the central frequency point22Is-13 dB, S33At-27 dB, the port 2 and port 3 isolation factor S23Is-21 dB.
The simulation result of the embodiment shows that the device of the utility model has two functions, not only can the average distribution input energy, can also select required frequency channel.
The above description is only a preferred example of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The non-equal power divider integrating the band-pass filtering function comprises an upper-layer microstrip structure, an isolation element, a middle-layer dielectric substrate and a lower-layer grounding metal plate, wherein the upper-layer microstrip structure is attached to the upper surface of the middle-layer dielectric plate, and the lower surface of the middle-layer dielectric plate is made of grounding metal; the method is characterized in that: the upper-layer microstrip structure comprises two single-frequency band-pass filter circuits, the input impedances of the two single-frequency band-pass filter circuits are different so as to realize unequal distribution of power, the two single-frequency band-pass filter circuits share one input port to serve as an input port (I/P) of the unequal power distributor with the integrated band-pass filter function, and the output ports of the two single-frequency band-pass filter circuits serve as a first output port (O/P1) and a second output port (O/P2) of the unequal power distributor with the integrated band-pass filter function.
2. The unequal power divider integrating the band-pass filtering function according to claim 1, wherein the input impedance of the upper single-frequency band-pass filtering circuit is different from that of the lower single-frequency band-pass filtering circuit, thereby achieving unequal power division; the input and output impedance of each single-frequency band-pass filter circuit can be adjusted by changing the coupling strength between the resonators and the port position so as to carry out power distribution in different ratios and realize matching.
3. The non-equal power divider with integrated band-pass filtering function according to claim 1, characterized in that the single-frequency band-pass filtering circuit located above is composed of three quarter-wave resonators coupled, respectively a first resonator (1), a second resonator (2) and a third resonator (3); the first resonator (1) is a microstrip line with an open start end and a grounded tail end, and the microstrip line is formed by a first microstrip line (7), a second microstrip line (8), a third microstrip line (9) and a fourth microstrip line (10) which are sequentially connected; the second resonator (2) is a microstrip line which is composed of a fifth microstrip line (11), a sixth microstrip line (12), a seventh microstrip line (13), an eighth microstrip line (14), a ninth microstrip line (15) and a tenth microstrip line (16) which are connected in sequence, the starting end of the microstrip line is grounded, and the tail end of the microstrip line is open; the third resonator (3) is a microstrip line with a grounded initial end and an open tail end, and the microstrip line consists of an eleventh microstrip line (17), a twelfth microstrip line (18), a thirteenth microstrip line (19), a fourteenth microstrip line (20) and a fifteenth microstrip line (21) which are connected in sequence; the second microstrip line (8) is coupled with the thirteenth microstrip line (19), the third microstrip line (9) is coupled with the twelfth microstrip line (18), the fourth microstrip line (10) is coupled with the fifth microstrip line (11), and one end of the fifth microstrip line (11) is coupled with one end of the eleventh microstrip line (17); the open end of the first resonator (1) is connected with the input port (I/P), and the thirteenth microstrip line (19) of the third resonator (3) is connected with the first output port (O/P1); the single-frequency band-pass filter circuit positioned below is formed by coupling three quarter-wavelength resonators, namely a fourth resonator (4), a fifth resonator (5) and a sixth resonator (6); the fourth resonator (4) is a microstrip line with an open starting end and a grounded tail end, and the microstrip line is formed by a sixteenth microstrip line (22), a seventeenth microstrip line (23), an eighteenth microstrip line (24) and a nineteenth microstrip line (25) which are connected in sequence; the fifth resonator (5) is a microstrip line with a grounded initial end and an open-circuit tail end, and the microstrip line is formed by a twentieth microstrip line (26), a twenty-first microstrip line (27), a twenty-second microstrip line (28), a twenty-third microstrip line (29), a twenty-fourth microstrip line (30) and a twenty-fifth microstrip line (31) which are sequentially connected; the sixth resonator (6) is a microstrip line with a grounded initial end and an open tail end, and the microstrip line consists of a twenty-sixth microstrip line (31), a twenty-seventh microstrip line (32), a twenty-eighth microstrip line (33), a twenty-ninth microstrip line (34) and a thirty-third microstrip line (35) which are connected in sequence; the seventeenth microstrip line (23) is coupled with the twenty-ninth microstrip line (34), the eighteenth microstrip line (24) is coupled with the twenty-eighth microstrip line (33), the nineteenth microstrip line (25) is coupled with the twentieth microstrip line (26), and one end of the twentieth microstrip line (26) is coupled with one end of the twenty-seventh microstrip line (32); the open end of the fourth resonator (4) is connected with the input port (I/P), and the twenty-eighth microstrip line of the sixth resonator (6) is connected with the second output port (O/P2); one end of the isolation element is connected with the open end of the second resonator (2) positioned above, and the other end is connected with the open end of the fifth resonator (5) positioned below.
4. The integrated band-pass filter function non-uniform power divider according to claim 3, wherein the length L of the quarter-wave resonator is a quarter of the wavelength λ corresponding to the resonance frequency f of the single-frequency band-pass filter circuit; where L is the actual microstrip line length.
5. The integrated band-pass filter function unequal power divider according to any one of claims 1-4, characterized in that the isolation element (36) is a resistor, a capacitor or an inductor.
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| CN 201220415600 Expired - Fee Related CN202997024U (en) | 2012-08-21 | 2012-08-21 | Non-equant power divider integrated with band-pass filtering function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832433A (en) * | 2012-08-21 | 2012-12-19 | 华南理工大学 | Non-uniform power divider with integrated band-pass filtering function |
| CN103915669A (en) * | 2014-03-07 | 2014-07-09 | 华南理工大学 | Filtering power divider with double passing bands |
| CN105977600A (en) * | 2016-06-28 | 2016-09-28 | 西安工业大学 | Small-size three-passband differential power divider |
| RU171566U1 (en) * | 2016-03-22 | 2017-06-06 | Сергей Дмитриевич Кирилюк | MICROWAVE TWO CHANNEL DIVIDER |
| CN113992280A (en) * | 2021-10-25 | 2022-01-28 | 广州通则康威智能科技有限公司 | Insertion loss calibration device of broadband channel production and measurement clamp and working method thereof |
-
2012
- 2012-08-21 CN CN 201220415600 patent/CN202997024U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832433A (en) * | 2012-08-21 | 2012-12-19 | 华南理工大学 | Non-uniform power divider with integrated band-pass filtering function |
| CN102832433B (en) * | 2012-08-21 | 2015-01-28 | 华南理工大学 | Non-uniform power divider with integrated band-pass filtering function |
| CN103915669A (en) * | 2014-03-07 | 2014-07-09 | 华南理工大学 | Filtering power divider with double passing bands |
| RU171566U1 (en) * | 2016-03-22 | 2017-06-06 | Сергей Дмитриевич Кирилюк | MICROWAVE TWO CHANNEL DIVIDER |
| CN105977600A (en) * | 2016-06-28 | 2016-09-28 | 西安工业大学 | Small-size three-passband differential power divider |
| CN113992280A (en) * | 2021-10-25 | 2022-01-28 | 广州通则康威智能科技有限公司 | Insertion loss calibration device of broadband channel production and measurement clamp and working method thereof |
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