CN101901951B - Bent dual-band bandpass filter applying defected ground level waveguide technology - Google Patents
Bent dual-band bandpass filter applying defected ground level waveguide technology Download PDFInfo
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- CN101901951B CN101901951B CN201010249848.XA CN201010249848A CN101901951B CN 101901951 B CN101901951 B CN 101901951B CN 201010249848 A CN201010249848 A CN 201010249848A CN 101901951 B CN101901951 B CN 101901951B
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Abstract
The invention relates to a bent dual-band bandpass filter applying a defected ground level waveguide technology, which comprises an upper surface micro-band part and a defected ground level waveguide structure of a ground part, wherein the upper surface micro-band part comprises a micro-band input port (1), a micro-band output port (2) and a pair of T-shaped coupling arms (3) and (4), wherein the input port (1) is coupled to the defected ground level waveguide structure of the ground through the coupling arm (3), and the output port (2) is coupled to the defected ground level waveguide structure of the ground through the coupling arm (4); and the defected ground level waveguide structure of the ground part is formed by bending and winding a big square defected ground level waveguide ring into three square defected ground level waveguide rings, wherein the three square defected ground level waveguide rings are respectively a defected ground waveguide square ring (5) which is positioned at the outermost layer, a defected ground waveguide square ring (6) which is bent inward and is positioned at the middle layer, and a defected ground waveguide square ring (7) which is bent inward and is positioned at the innermost layer. The invention is applied in intensive integrated circuits.
Description
Technical field
The present invention relates to a kind of bending type dual-band bandpass filter of applied defect ground level guide technology, belong to wave filter technology field.
Background technology
Along with the continuous progress of science and technology, mobile communication, satellite communication, radar and wireless telemetry be constantly development also, and the microwave of system to radio frequency receiving and transmitting front end, the design of radio-frequency filter have proposed more and more higher requirement.Microstrip filter, because size own is little, processed complex degree is relatively low, quality light and be easy to the advantages such as integrated, has obtained being widely used in the circuit such as microwave integrated circuit (MIC).
Two-band microwave filter, may be simultaneously operated in two different frequency ranges of radio communication.This filter is the signal of processing two wave bands with a two-band unit.This design concept provides infrastructure and the high performance product of easy realization.Traditional design double-frequency communication system, each communication system has its independently antenna, filter, the components and parts such as low noise amplifier, therefore volume is large, and power consumption is large.Employing has the dual-band antenna of single port input single port output, and filter and low noise amplifier, can reduce dual-frequency system volume greatly, improves system reliability.Therefore in communication equipment, two-band filter has become the critical elements in the Wireless Telecom Equipment of microwave frequency band.
Novel defect ground level waveguiding structure is a kind of novel waveguiding structure, and it has not only realized the space transmission electromagnetic wave that takes full advantage of ground to reach with logical effect, and the power carrying that has increased circuit, is easy to integrated, convenient for production.
Summary of the invention
The object of the invention is, in order to improve the function of band pass filter, the present invention proposes to adopt a kind of novel defect ground level waveguide (DGW) structure, and this structure takes full advantage of the space transmission electromagnetic wave on ground to reach with logical effect, and the power carrying that has increased circuit.In order to realize the miniaturization of circuit and to be applied in GSM/WLAN system, the present invention proposes to adopt a kind of structure bending inwards, both can greatly reduce the area that circuit takies, and can outside primary band, additionally produce a new band passband section, to reach the object that two-band band is logical.
The technical solution adopted for the present invention to solve the technical problems is: input and output microstrip feed line is also coupled to ground by a pair of T-shaped coupling arm gap, has opened on the ground the groove of three square defect ground level waveguides simultaneously, forms double band bandpass filter.
The bending type dual-band bandpass filter of a kind of applied defect ground level of the present invention guide technology is comprised of the defect ground plane waveguiding structure of the micro-band portion of upper surface and above ground portion.
The micro-band portion of upper surface is comprised of micro-tape input output port (1), (2) and a pair of T shape coupling arm (3), (4), input port (1) is coupled to the defect ground level waveguiding structure on ground by coupling arm (3), input port (2) is coupled to the defect ground level waveguiding structure on ground by coupling arm (4), coupling arm (3), (4) lay respectively at defect ground waveguide Q-RING (7) two opposite side directly over.
The defect ground level waveguiding structure of above ground portion is bent to process by a large square defect ground level waveguide ring and is coiled into three square defect ground level waveguide rings and is formed, they are respectively outermost defect ground waveguide Q-RINGs (5), the defect ground waveguide Q-RING (6) of the centre bending inwards, the innermost defect ground waveguide Q-RING (7) bending inwards.
Use this novel defect ground connection waveguiding structure, can realize by ground the function of ripple transmission.
The defect ground level waveguide of above ground portion of the present invention realizes by the technique bending inwards, and makes it to produce three defect ground waveguide Q-RING (5), (6), (7), and this structure can make circuit area greatly reduce.
The defect ground level waveguide of above ground portion bend inwards three defects ground waveguide Q-RING (5), (6), (7) that form, can on the basis of the frequency of basic passband, produce an extra band connection frequency, become double band bandpass filter.
Novel waveguide structure of the present invention can increase the load power of filter greatly, can be applicable in GSM/WLAN system.
The present invention compared with prior art had advantages of: the present invention is not increasing under the prerequisite of circuit area and processed complex degree, adopt defect ground level waveguiding structure can effectively utilize the space on ground, carry out electromagnetic transmission, and increase the power-carrying of its circuit; And by the bending processing of ground defect part, effectively the miniaturization of implementation structure and bilateral band band are logical.
Project organization compactness of the present invention, is easy to integratedly, is useful in intensive integrated circuit and uses.
Accompanying drawing explanation
Fig. 1 is the space structure figure of double band bandpass filter;
Fig. 2 is the structure chart of the micro-band portion of upper surface;
Fig. 3 is the structure chart of the defect ground plane waveguide of above ground portion;
Picture in picture number represents: (1) is micro-tape input port; (2) be micro-band output port; (3), (4) are a pair of T shape coupling arms; (5) be outermost defect ground waveguide Q-RING; (6) be the defect ground waveguide Q-RING of the centre that bends inwards; (7) be the innermost defect ground waveguide Q-RING bending inwards.
Embodiment
As shown in Figure 1, the present embodiment is to be 4.5 at dielectric constant to the bending type dual-band bandpass filter of a kind of applied defect ground level of embodiment of the present invention guide technology, implements to produce on the dielectric-slab that thickness is 0.8mm.
The structure of the micro-band portion of upper surface in the embodiment of the present invention as shown in Figure 2, the micro-band portion of upper surface is comprised of micro-tape input output port (1), (2) and a pair of T shape coupling arm (3), (4), input port (1) is coupled to the defect ground level waveguiding structure on ground by coupling arm (3), input port (2) is coupled to the defect ground level waveguiding structure on ground by coupling arm (4), coupling arm (3), (4) lay respectively at defect ground waveguide Q-RING (7) two opposite side directly over.
The defect ground ground plane waveguiding structure of the above ground portion in the embodiment of the present invention as shown in Figure 2, a large square defect ground level waveguide ring is bent to process and be coiled into three square defect ground level waveguide rings, they are respectively outermost defect ground waveguide Q-RINGs (5), the defect ground waveguide Q-RING (6) of the centre bending inwards, the innermost defect ground waveguide Q-RING (7) bending inwards.The total length of defect ground level waveguide ring (5), (6), (7) has determined the passband working frequency range of the gsm system of 1.8GHz, and the length of defect ground level waveguide ring (6), (7) has determined the passband working frequency range of the wlan system of 2.45GHz.The circuit area that has not only greatly reduced this filter is processed in the bending of the defect ground level waveguiding structure in Fig. 2, and at the primary band of 1.8GHz, by cross-couplings, obtained extraly the working frequency range of 2.4GHz outward, to have reached the logical function of double frequency-band band, be applied in GSM/WLAN system.
Claims (2)
1. a bending type dual-band bandpass filter for applied defect ground level guide technology, is characterized in that, described filter is comprised of the defect ground level waveguiding structure of the micro-band portion of upper surface and above ground portion;
The micro-band portion of upper surface is comprised of micro-tape input port (1), micro-band output port (2), a T shape coupling arm (3) and the 2nd T shape coupling arm (4), micro-tape input port (1) is coupled to the defect ground level waveguiding structure of above ground portion by a T shape coupling arm (3), micro-band output port (2) is coupled to the defect ground level waveguiding structure of above ground portion by the 2nd T shape coupling arm (4);
The defect ground level waveguiding structure of above ground portion is bent to process by a large square defect ground level waveguide ring and is coiled into three square defect ground level waveguide rings and is formed, they are respectively outermost defect ground level waveguide Q-RINGs (5), the defect ground level waveguide Q-RING (6) of the centre bending inwards, the innermost defect ground level waveguide Q-RING (7) bending inwards; Wherein, a T shape coupling arm (3) and the 2nd T shape coupling arm (4) lay respectively at innermost defect ground level waveguide Q-RING (7) two opposite side directly over;
Use this defect ground level waveguiding structure, a T shape coupling arm and the 2nd T shape coupling arm can be directly coupled to innermost defect ground level waveguide Q-RING, realize the function of ripple transmission by ground.
2. the bending type dual-band bandpass filter of a kind of applied defect ground level guide technology according to claim 1, it is characterized in that, the defect ground level waveguiding structure of described above ground portion is realized by the technique bending inwards, make it to produce three defect ground level waveguide Q-RINGs (5), (6), (7), this structure can make circuit area greatly reduce and make filter on the basis of the frequency of basic passband, produce an extra band connection frequency by cross-couplings, becomes double band bandpass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010249848.XA CN101901951B (en) | 2010-08-10 | 2010-08-10 | Bent dual-band bandpass filter applying defected ground level waveguide technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010249848.XA CN101901951B (en) | 2010-08-10 | 2010-08-10 | Bent dual-band bandpass filter applying defected ground level waveguide technology |
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| Publication Number | Publication Date |
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| CN101901951A CN101901951A (en) | 2010-12-01 |
| CN101901951B true CN101901951B (en) | 2014-04-16 |
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| CN201010249848.XA Expired - Fee Related CN101901951B (en) | 2010-08-10 | 2010-08-10 | Bent dual-band bandpass filter applying defected ground level waveguide technology |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496755B (en) * | 2011-12-06 | 2013-11-13 | 北京航空航天大学 | Miniaturized double-stopband microstrip filter |
| CN102856614B (en) * | 2012-08-30 | 2015-01-14 | 南通大学 | Compact microwave distributed band-pass filter with double pass-bands |
| CN103022599A (en) * | 2012-11-28 | 2013-04-03 | 杨磊 | PCB (Printed Circuit Board) filter |
| CN104051827A (en) * | 2014-06-24 | 2014-09-17 | 中国科学院微电子研究所 | Broadband band-pass filter based on spiral defected ground |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2809909Y (en) * | 2004-05-18 | 2006-08-23 | 威盛电子股份有限公司 | Parallel-coupling line form filter |
| CN2886828Y (en) * | 2006-01-26 | 2007-04-04 | 东南大学 | Millimeter wave positioning coupler |
| CN101436696A (en) * | 2008-11-28 | 2009-05-20 | 杭州华三通信技术有限公司 | Microstrip filter |
| CN101777678A (en) * | 2010-03-08 | 2010-07-14 | 华东交通大学 | Double-mode double-band band-pass filter based on hexagonal ring resonator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7248129B2 (en) * | 2004-05-19 | 2007-07-24 | Xytrans, Inc. | Microstrip directional coupler |
| CN101515661B (en) * | 2009-03-26 | 2012-10-31 | 上海大学 | Microstrip dual-mode filter of nesting ring-structured parallel feeder lines |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2809909Y (en) * | 2004-05-18 | 2006-08-23 | 威盛电子股份有限公司 | Parallel-coupling line form filter |
| CN2886828Y (en) * | 2006-01-26 | 2007-04-04 | 东南大学 | Millimeter wave positioning coupler |
| CN101436696A (en) * | 2008-11-28 | 2009-05-20 | 杭州华三通信技术有限公司 | Microstrip filter |
| CN101777678A (en) * | 2010-03-08 | 2010-07-14 | 华东交通大学 | Double-mode double-band band-pass filter based on hexagonal ring resonator |
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