CN101630769B - Microwave double-frequency bandpass filtering device - Google Patents
Microwave double-frequency bandpass filtering device Download PDFInfo
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- CN101630769B CN101630769B CN 200910115578 CN200910115578A CN101630769B CN 101630769 B CN101630769 B CN 101630769B CN 200910115578 CN200910115578 CN 200910115578 CN 200910115578 A CN200910115578 A CN 200910115578A CN 101630769 B CN101630769 B CN 101630769B
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Abstract
The invention relates to a microwave double-frequency bandpass filtering device which comprises two three-section type hair-clip-shaped stepped impedance resonators (1, 2, 3) and (4, 5, 6) and two stepped impedance resonators (7) and (8), wherein the two three-section type hair-clip-shaped stepped impedance resonators are symmetrical and in gapless coupling through (3) and (6), the stepped impedance resonators (7) and the (2) in the three-section type hair-clip-shaped stepped impedance resonator (1, 2, 3) form a side-coupled feeding structure, the stepped impedance resonators (8) and the (5) in the three-section type hair-clip-shaped stepped impedance resonator (4, 5, 6) form a side-coupled feeding structure, the (11) end of the stepped impedance resonator (7) is an input port, and the (12) end of the stepped impedance resonator (8) is an output port. On the premise that the circuit area and the processing complexity are not increased, the filter can realize the double-frequency bandpass filtering function by adopting the symmetrical three-section type hair-clip-shaped distribution structures and the side-coupled feeding structures; and the invention also has the advantages of compact design, easy integration and convenient circuit processing.
Description
Technical field
The invention belongs to the microwave telecommunication devices technical field, particularly a kind of microwave band-pass filter.
Background technology
Microwave filter is a kind of as filter, in mobile communication, has a wide range of applications.The development of making rapid progress along with mobile communication at present; Double frequency and multiple-frequency operation are very general; To the also corresponding raising of the requirement of crossover frequency; Because one type of circuit such as parametric amplifier, microwave solids frequency multiplier, microwave solids frequency mixer all is a multiple-frequency operation, need corresponding filter, so realize multiband shared be an important topic of modern microwave telecommunication system design.As a Primary Component in the communication system, the multifrequencyization of microwave filter is designed to key technology wherein.Usually, the method for inserting a stopband at a broad passband realizes double-frequency bandpass filtering device, in order to realize the impedance matching of input/output terminal, need between port and filter, insert impedance matching network usually.But above-mentioned application all is based on one-segment Filter Design method, and simultaneously, the external impedance matching network will cause taking bigger circuit area and bigger discrepancy loss, strengthens difficulty of design.Characteristics such as step electric impedance resonator is simple owing to its circuit, and the resonator resonance frequency is easy to control are widely used in the design of band pass filter.What is worth mentioning is, the step electric impedance resonator coupled structure is because its excellent characteristic, and the manageable characteristics of fundamental frequency harmonic frequency of resonator are widely used in the design of two-band microwave filter.
Summary of the invention
The objective of the invention is to propose a kind of syllogic hair clip shape distributed architecture of symmetry and the compact double-frequency bandpass filtering device of limit coupling feed structure; Resulting filter can satisfy the demand of using GPS network and wlan network in the radio communication simultaneously, and the gained filter construction is simple, compact.
Technical scheme of the present invention is: on traditional step electric impedance resonator basis, use the syllogic hair clip shape distributed architecture and the limit coupling feed structure of symmetry, can be applicable to two kinds of different frequency ranges (GPS and WLAN) simultaneously.
Of Fig. 3; Specifically; Double-frequency bandpass filtering device of the present invention is made up of two syllogic hair clip shape step electric impedance resonators and two step electric impedance resonators; Wherein the 3rd impedance section (3) of first syllogic hair clip shape step electric impedance resonator is symmetry and adopts the coupling of no gap with the 3rd impedance section (6) of second syllogic hair clip shape step electric impedance resonator; The second impedance section (2) in first step electric impedance resonator (7) and first syllogic hair clip shape step electric impedance resonator constitutes limit coupling feed structure; Second step electric impedance resonator (8) constitutes limit coupling feed structure with the second impedance section (5) in second syllogic hair clip shape step electric impedance resonator; The input/output end port (11) of first step electric impedance resonator (7) is an input port, and the I/O end port (12) of second step electric impedance resonator (8) is an output port.
The coupled characteristic of two syllogic step electric impedance resonators of the present invention can be regulated with the overlap length of the 3rd impedance section (6) of second syllogic hair clip shape step electric impedance resonator through the 3rd impedance section (3) that changes first syllogic hair clip shape step electric impedance resonator; The coupled characteristic of syllogic hair clip shape step electric impedance resonator and step electric impedance resonator can be regulated through the gap length degree (9) that changes between the two; Change the clearance distance (10) between first step electric impedance resonator (7) and second step electric impedance resonator (8), can regulate the quality factor of double frequency-band, thereby reach control filter bandwidht.
The advantage that the present invention is compared with prior art had: the present invention is not increasing under circuit area and the processed complex degree prerequisite, adopts the syllogic hair clip shape distributed architecture of symmetry and the filter of limit coupling feed structure can make filter realize two-band bandpass filtering function; And the present invention is compact to design, be easy to integrated, convenient circuit processing.
Description of drawings
Below in conjunction with accompanying drawing and embodiment patent of the present invention is further specified.
Fig. 1 is a syllogic hair clip shape step electric impedance resonator distributed architecture sketch map;
Fig. 2 is the syllogic hair clip shape step electric impedance resonator distributed architecture sketch map of two symmetries;
Fig. 3 is the distributed architecture sketch map of double-frequency bandpass filtering device according to the invention;
Among the figure: 1,2,3 constitute first syllogic hair clip shape step electric impedance resonator; 4,5,6 constitute second syllogic hair clip shape step electric impedance resonator, and 7 is first step electric impedance resonator, and 8 is second step electric impedance resonator; 9 is resonator 2,7 gap widths; 10 is resonator 7,8 spacings, and 11 is input port, and 12 is output port.
Embodiment
The present invention will further specify through following examples.
Embodiment.
In Fig. 1, syllogic hair clip shape step electric impedance resonator is made up of the first impedance section 1, the second impedance section 2, the 3rd impedance section 3 three part step electric impedance resonators.
In Fig. 2; The syllogic hair clip shape step electric impedance resonator of symmetry is made up of two syllogic hair clip shape step electric impedance resonators; Wherein the 3rd impedance section 6 of the 3rd impedance section 3 of first syllogic hair clip shape step electric impedance resonator and second syllogic hair clip shape step electric impedance resonator adopts no gap coupled modes; Integral layout is a symmetrical structure; Have dual frequency characteristics, have two resonance frequencys, the length of the 3rd impedance section 3 that its coupled characteristic can also be through changing overlapping first syllogic hair clip shape step electric impedance resonator and the 3rd impedance section 6 of second syllogic hair clip shape step electric impedance resonator is regulated.
In Fig. 3; The second impedance section, the 2 formation limits coupling feed structure of first syllogic hair clip shape step electric impedance resonator in the syllogic hair clip shape step electric impedance resonator of first step electric impedance resonator 7 and symmetry; The second impedance section, the 5 formation limits coupling feed structure of second syllogic hair clip shape step electric impedance resonator in the syllogic hair clip shape step electric impedance resonator of second step electric impedance resonator 8 and symmetry, its coupled characteristic can be regulated through the gap width 9 that changes between first step electric impedance resonator 7 and second step electric impedance resonator 8.
The microwave double-frequency bandpass filtering device of present embodiment adopts syllogic hair clip shape distributed architecture and the limit coupling feed structure of symmetry as shown in Figure 3.Signal is input to symmetrical syllogic hair clip shape step electric impedance resonator by input port 11 inputs respectively through limit coupling feed structure, is coupled feed structure to output port 12 through the limit again then.Owing to adopt two syllogic hair clip shape step electric impedance resonators 1,2,3 and 4,5,6; Form the two-band of filter; The frequency range position can be controlled through the impedance and the length that change resonator, and frequency bandwidth can be controlled through the distance and the overlap length that change between resonator; The syllogic hair clip shape distributed architecture of symmetry adopts complete coupled modes, can improve the stopband characteristic of filter.The form of limit coupling feed structure is all adopted in input and output, changes the clearance distance 10 between first step electric impedance resonator 7 and second stepped impedance 8, can regulate the quality factor of double frequency-band, thereby reach the control to filter bandwidht.
Claims (4)
1. microwave double-frequency bandpass filtering device; It is characterized in that forming by two syllogic hair clip shape step electric impedance resonators and two step electric impedance resonators; Wherein the 3rd impedance section (3) of first syllogic hair clip shape step electric impedance resonator is symmetry and adopts the coupling of no gap with the 3rd impedance section (6) of second syllogic hair clip shape step electric impedance resonator; The second impedance section (2) in first step electric impedance resonator (7) and first syllogic hair clip shape step electric impedance resonator constitutes limit coupling feed structure; Second step electric impedance resonator (8) constitutes limit coupling feed structure with the second impedance section (5) in second syllogic hair clip shape step electric impedance resonator; The input/output end port (11) of first step electric impedance resonator (7) is an input port, and the I/O end port (12) of second step electric impedance resonator (8) is an output port.
2. filter according to claim 1 is characterized in that the coupled characteristic of two syllogic hair clip shape step electric impedance resonators can be regulated with the overlap length of the 3rd impedance section (6) of second syllogic hair clip shape step electric impedance resonator through the 3rd impedance section (3) that changes first syllogic hair clip shape step electric impedance resonator.
3. filter according to claim 1 is characterized in that the coupled characteristic of syllogic hair clip shape step electric impedance resonator and step electric impedance resonator can be regulated through the gap length degree (9) that changes between the two.
4. filter according to claim 1 is characterized in that changing the clearance distance (10) between first step electric impedance resonator (7) and second step electric impedance resonator (8), regulates the quality factor of double frequency-band.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910115578 CN101630769B (en) | 2009-06-24 | 2009-06-24 | Microwave double-frequency bandpass filtering device |
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| CN 200910115578 CN101630769B (en) | 2009-06-24 | 2009-06-24 | Microwave double-frequency bandpass filtering device |
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| CN101630769A CN101630769A (en) | 2010-01-20 |
| CN101630769B true CN101630769B (en) | 2012-10-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101944645A (en) * | 2010-08-19 | 2011-01-12 | 华东交通大学 | DGW structure-based micro-strip S-waveband band pass filter |
| CN113131108B (en) * | 2021-03-22 | 2021-11-02 | 华东交通大学 | Balance filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6819194B2 (en) * | 2001-04-11 | 2004-11-16 | Kyocera Wireless Corp. | Tunable voltage-controlled temperature-compensated crystal oscillator |
| CN1601924A (en) * | 2003-09-24 | 2005-03-30 | 海泰超导通讯科技（天津）有限公司 | Microstrip filter having group hairclip structure for microwave communication |
| CN2788377Y (en) * | 2005-01-14 | 2006-06-14 | 威盛电子股份有限公司 | Partial suspended open-circuit line resonator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6819194B2 (en) * | 2001-04-11 | 2004-11-16 | Kyocera Wireless Corp. | Tunable voltage-controlled temperature-compensated crystal oscillator |
| CN1601924A (en) * | 2003-09-24 | 2005-03-30 | 海泰超导通讯科技（天津）有限公司 | Microstrip filter having group hairclip structure for microwave communication |
| CN2788377Y (en) * | 2005-01-14 | 2006-06-14 | 威盛电子股份有限公司 | Partial suspended open-circuit line resonator |
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